Mitsubishi Electric MELSEC Q Series / L Series / iQ-R Series PLC Special Relays (SM) and Special Registers (SD)

Based on the QCPU User's Manual (Hardware Design, Maintenance and Inspection) and the MELSEC iQ-R CPU Module User's Manual, special relays (SM) and special registers (SD) are grouped by device number, with support for each model shown by 〇.

Special relay (SM) list

Diagnostic information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SM0	Diagnostic error	S	○	○	○	○	○	○	○			○	○	(Note 1)
SM1	Self-diagnostic error	S	○	○	○	○	○	○	○			○	○	(Note 1)
SM5	Error common information	S	○	○	○	○	○	○	○	○	○	○
SM16	Error individual information	S	○	○	○	○	○	○	○	○	○	○
SM50	Error reset	U	○	○	○	○	○	○	○	○	○	○	○
SM51	Battery low latch	S	○	○	○	○	○	○	○	○	○	○	○	(Note 1)
SM52	Low battery	S	○	○	○	○	○	○	○	○	○	○	○
SM53	AC/DC DOWN detection	S	○	○	○	○	○	○	○	○	○	○	○	(Note 1)
SM56	Operation error	S	○	○	○	○	○	○	○	○	○	○	○
SM60	Blown fuse detection	S	○	○	○	○	○	○	○	○	○	○	○
SM61	I/O module verification error	S	○	○	○	○	○	○	○	○	○	○	○
SM62	Annunciator detection	S	○	○	○	○	○	○	○	○	○	○	○
SM80	CHK detection	S				○	○	○					○	iQ-R: Detailed information 1 in-use flag
SM84	Error reset	U								○	○	○
SM90-99	Step transition watchdog timer start (valid only when there is an SFC program)	U				○	○	○
SM100	Serial communication function use flag	S		○	○				○			○
SM101	Communication protocol status flag	S		○	○				○			○
SM110	Protocol error	S		○	○				○			○
SM111	Communication status	S		○	○				○			○
SM112	Clear error information	U		○	○				○			○	○	iQ-R: Detailed information 2 in-use flag
SM113	Overrun error	S		○	○				○			○
SM114	Parity error	S		○	○				○			○
SM115	Framing error	S		○	○				○			○
SM150	Power-off/power supply voltage drop detection												○
SM151	Power supply failure detection												○
SM152	Momentary power failure detection (power supply 1)												○
SM153	Momentary power failure detection (power supply 2)												○
SM154	Power supply module not recognized												○
SM165	Program memory batch transfer execution status	S							○			○

(Note 1) The contents vary by model. Check the manual for details.

System information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM202	LED off command	U				○	○	○	○			○
SM203	STOP contact	S	○	○	○	○	○	○	○	○	○	○		○
SM204	PAUSE contact	S	○	○	○	○	○	○	○	○	○	○		○
SM206	PAUSE enable coil	U	○	○	○	○	○	○	○	○	○	○
SM210	Clock data set request	U	○	○	○	○	○	○	○	○	○	○		○
SM211	Clock data error	S	○	○	○	○	○	○	○	○	○	○		○
SM213	Clock data read request	U	○	○	○	○	○	○	○	○	○	○		○
SM214	Device write from external disabled status	S								○	○
SM217	Daylight saving time flag													○
SM220	CPU No.1 preparation completed	S	○	○	○	○	○	○	○	○	○			○
SM221	CPU No.2 preparation completed	S							○					○
SM222	CPU No.3 preparation completed	S							○					○
SM223	CPU No.4 preparation completed	S							○					○
SM230	CPU No.1 error flag													○
SM231	CPU No.2 error flag													○
SM232	CPU No.3 error flag													○
SM233	CPU No.4 error flag													○
SM235	Online module change flag	S					○
SM236	ON for one scan only after online module change flag	S					○
SM237	Device range check disable flag	U							○			○
SM240	CPU No.1 reset flag	S		○	○	○	○		○			○		○
SM241	CPU No.2 reset flag	S		○	○	○	○		○					○
SM242	CPU No.3 reset flag	S		○	○	○	○		○					○
SM243	CPU No.4 reset flag	S				○	○		○					○
SM244	CPU No.1 error flag	S		○	○	○	○		○			○
SM245	CPU No.2 error flag	S		○	○	○	○		○
SM246	CPU No.3 error flag	S		○	○	○	○		○
SM247	CPU No.4 error flag	S				○	○		○
SM250	Maximum loaded I/O read	U				○	○	○
SM254	All stations refresh command	U				○	○	○	○						(Note 1)
SM255-257	MELSECNET/10, MELSECNET/H module 1 information	S/U				○	○	○
SM260-262	MELSECNET/10, MELSECNET/H module 2 information	S/U				○	○	○
SM265-267	MELSECNET/10, MELSECNET/H module 3 information	S/U				○	○	○
SM270-272	MELSECNET/10, MELSECNET/H module 4 information	S/U				○	○	○
SM280	CC-Link error	S				○	○	○
SM310	RS-232, RS-422/485 adapter present/absent	S										○
SM315	Communication reserved time wait enable/disable flag	U	○	○	○
SM319	CC-Link auto start status	S										○
SM320	SFC program present/absent	S	○	○	○	○	○	○	○			○		○
SM321	SFC program start/stop	S/U	○	○	○	○	○	○	○			○		○
SM322	SFC program start status	S/U	○	○	○	○	○	○	○			○		○
SM323	Continuous transition for all blocks present/absent	U	○	○	○	○	○	○	○			○		○
SM324	Continuous transition prevention flag	S	○	○	○	○	○	○	○			○		○
SM325	Output mode at block stop	S/U	○	○	○	○	○	○	○			○		○
SM326	SFC device clear mode	U	○	○	○	○	○	○	○			○		○
SM327	Output at end step execution	S/U	○	○	○	○	○	○	○			○		○
SM328	Clear processing mode at end step	U	○	○	○				○			○		○
SM329	Online change of inactive block in progress flag	S							○				○	○
SM330	Operation mode of low-speed execution type program	U				○	○
SM331	Normal SFC program execution status	S				○	○	○
SM332	Program execution management SFC program execution status	S				○	○	○
SM339	Latch clear function execution command	U								○	○	○
SM384	System operation setting request													○
SM385	System operation setting error													○
SM386	Operation history lost flag	S								○	○			○	iQ-R: Program restoration information write status LED control setting status
SM387	Program restoration information write status													○
SM388	File batch online change operation setting status													○
SM390	Access execution flag	S				○	○	○
SM391	GINT instruction execution completion flag	S		○	○	○	○		○

(Note 1) The contents vary by model. Check the manual for details.

System clock/counter

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R
SM400	Always ON	S	○	○	○	○	○	○	○	○	○	○	○
SM401	Always OFF	S	○	○	○	○	○	○	○	○	○	○	○
SM402	ON for 1 scan only after RUN	S	○	○	○	○	○	○	○			○	○
SM403	OFF for 1 scan only after RUN	S	○	○	○	○	○	○	○			○	○
SM404	ON for one scan only after low-speed execution type program RUN	S				○	○
SM405	OFF for one scan only after low-speed execution type program RUN	S				○	○
SM409	0.01 s clock	S				○	○	○	○			○	○
SM410	0.1 s clock	S	○	○	○	○	○	○	○	○	○	○	○
SM411	0.2 s clock	S	○	○	○	○	○	○	○	○	○	○	○
SM412	1 s clock	S	○	○	○	○	○	○	○	○	○	○	○
SM413	2 s clock	S	○	○	○	○	○	○	○	○	○	○	○
SM414	2n s clock	S	○	○	○	○	○	○	○	○	○	○	○
SM415	2n (ms) clock	S				○	○	○	○			○	○
SM420-424	User timing clock No.0-4	S	○	○	○	○	○	○	○	○	○	○	○
SM430-234	User timing clock No.5-9	S				○	○
SM440	ON only the first time after I44 RUN												○
SM441	ON only the first time after I45 RUN												○
SM1184	System clock (SM400-403) update at every END setting request												○
SM1185	System clock (SM400-403) update at every END setting error												○
SM1186	System clock (SM400-403) update at every END setting status												○

Fixed cycle function information (iQ-R additional items)

No.	Name	iQ-R
SM480	Inter-module synchronous interrupt program (I44) cycle error flag	○
SM481	Inter-CPU synchronous interrupt program (I45) cycle error flag	○
SM484	Inter-CPU synchronous interrupt program execution section excess error flag	○
SM488	Inter-module synchronization error (CPU module detected loss of synchronization)	○
SM522	Scan time clear request	○

Scan information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM510	Low-speed execution type program execution flag	S				○	○
SM551	Module service interval read	U				○	○	○

I/O refresh

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM580	I/O refresh between programs	U	○	○	○

Drive information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SM600	Memory card usable flag	S				○	○	○	○	○	○	○	○	(Note 1)
SM601	Memory card protect flag	S				○	○	○	○			○	○
SM602	Drive 1 flag	S				○	○	○	○
SM603	Drive 2 flag	S				○	○	○	○	○	○	○	○	(Note 1)
SM604	Memory card in-use flag	S				○	○	○	○			○	○
SM605	Memory card remove/insert prohibit flag	S/U				○	○	○	○	○	○	○	○	(Note 1)
SM606	SD memory card forced disable instruction	U								○	○	○	○
SM607	SD memory card forced disable status flag	S								○	○	○	○
SM609	Memory card remove/insert enable flag	S/U				○	○	○	○
SM620	Drive 3/4 usable flag	S	○	○	○	○	○	○	○	○	○	○
SM621	Drive 3/4 protect flag	S	○	○	○	○	○	○	○	○	○	○
SM622	Drive 3 flag	S	○	○	○	○	○	○	○			○
SM623	Drive 4 flag	S	○	○	○	○	○	○	○	○	○	○
SM624	Drive 3/4 in-use flag	S				○	○	○	○			○	○	iQ-R: Battery-less option cassette mounted flag
SM625	Battery-less function executing flag												○
SM626	Extended SRAM cassette mounted flag	S								○	○		○
SM628	Program memory write error												○
SM629	Program memory write flag												○
SM630	Program memory overwrite count error flag												○
SM632	Data memory write error												○
SM633	Data memory write flag												○
SM634	Project batch save completion flag	S										○	○	iQ-R: Data memory overwrite count error flag
SM636	Project batch load completion flag	S										○
SM638	Directory batch delete flag	S								○	○
SM640	File register use	S	○	○	○	○	○	○	○			○
SM650	Comment use	S				○	○	○	○			○
SM652	Function memory clear request												○
SM653	Data memory file transfer request												○
SM660	Boot operation	S	○	○	○	○	○	○	○			○		(Note 1)
SM671	Latch data backup to standard ROM completion flag	S							○			○
SM672	Memory card file register access range flag	S/U				○	○	○
SM675	Latch data backup to standard ROM completed with error	S							○			○
SM676	Restore repeat execution specification	U							○			○
SM680	Program memory write error	S							○			○
SM681	Program memory writing flag	S							○			○
SM682	Program memory overwrite count error flag	S							○			○
SM685	Standard ROM write error	S							○			○
SM686	Standard ROM writing flag	S							○			○
SM687	Standard ROM overwrite count error flag	S							○			○
SM691	Backup start preparation status flag	S							○			○
SM692	Restore completion flag	S							○			○

(Note 1) The contents vary by model. Check the manual for details.

Instruction related

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM699	Dedicated instruction not executed flag													○
SM700	Carry flag	S	○	○	○	○	○	○	○	○	○	○		○
SM701	Output character count switching	U				○	○	○	○			○		○
SM702	Search method	U	○	○	○	○	○	○	○	○	○	○		○
SM703	Sort order	U	○	○	○	○	○	○	○	○	○	○		○
SM704	Block comparison	S	○	○	○	○	○	○	○	○	○	○		○
SM705	Conversion digit count switching													○
SM709	DT.TM instruction invalid data detection flag	S/U							○			○		○
SM710	CHK instruction priority flag	S				○	○	○
SM715	EI flag	S	○	○	○	○	○	○	○	○	○	○
SM716	Block comparison (other than interrupt programs)	S							○			○
SM717	Block comparison (interrupt programs)	S							○			○
SM718	Block comparison (interrupt program (I45))	S							○
SM719	SMOV instruction BCD conversion disable flag	U								○	○	○
SM720	Comment read completion flag	S				○	○	○	○			○			(Note 1)
SM721	File access in progress	S				○	○	○	○	○	○	○			(Note 1)
SM722	BIN/DBIN instruction error disable flag	U	○	○	○	○	○	○	○	○	○	○
SM734	XCALL instruction execution condition specification	U				○
SM735	SFC comment read instruction executing flag	S				○	○	○	○				○
SM738	MSG instruction acceptance flag	S				○		○
SM739	Refresh device write/read instruction executing flag	S							○			○
SM740	Display unit usable flag	S										○
SM750	Scaling instruction search method setting	U							○			○
SM752	Dedicated instruction completion bit control flag													○
SM753	File access in progress													○
SM754	BIN/DBIN instruction error control flag													○
SM755	Scaling data check setting													○
SM756	Module access completion wait control flag													○
SM772	CCD and CRC instruction 16-bit/8-bit conversion mode specification	U								○	○	○		○
SM773	SMOV instruction BCD change disable flag													○
SM774	PID bumpless processing (for complete derivative)	U	○	○	○	○		○	○			○		○	iQ-R: Data table sort instruction sort order
SM775	Refresh processing selection when COM/CCOM instruction is executed	U	○	○	○	○	○	○	○			○		○
SM776	Local device enable/disable setting at CALL	U				○	○	○	○			○		○
SM777	Local device enable/disable setting in interrupt programs	U				○	○	○	○			○		○
SM792	PID bumpless processing (for complete derivative PIDCONT instruction)													○
SM794	PID bumpless processing (for incomplete derivative)	U	○	○	○	○		○	○			○		○
SM796	Multiple CPU high-speed communication dedicated instruction used block information (for CPU No.1)	S							○					○
SM797	Multiple CPU high-speed communication dedicated instruction used block information (for CPU No.2)	S							○					○
SM798	Multiple CPU high-speed communication dedicated instruction used block information (for CPU No.3)	S							○					○
SM799	Multiple CPU high-speed communication dedicated instruction used block information (for CPU No.4)	S							○					○

(Note 1) The contents vary by model. Check the manual for details.

Debug

No.	Name	Set by	Qn(H)	QnPH	QnPRH	QnU	QnUDV	LCPU	Remarks
SM800	Trace preparation	S	○	○	○	○		○
SM801	Trace start	S/U	○	○	○	○		○
SM802	Trace executing	S	○	○	○	○		○
SM803	Trace trigger	S/U	○	○	○	○		○
SM804	After trace trigger	S	○	○	○	○		○
SM805	Trace completed	S	○	○	○	○		○
SM826	Trace error	S	○	○	○	○		○
SM829	Forced registration specification of trace setting	U				○		○
SM830	Real-time monitor executing	S						○
SM841	Auto logging	S					○	○	(Note 1)

(Note 1) The contents vary by model. Check the manual for details.

Latch area

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SM916	Backup error presence flag	S	○	○
SM922	Restore error presence flag	S	○	○		○	iQ-R: Firmware update error completion presence
SM923	Backup data count upper limit operation setting flag	U	○	○
SM924	Automatic backup retry failure flag	S	○	○
SM940	Device test with execution condition operation setting					○
SM953	CPU module backup error presence flag					○
SM959	CPU module restore error presence flag					○
SM960	Data logging error presence flag	S	○	○	○	○	iQ-R: CPU module backup data count upper limit operation setting flag
SM961	Automatic backup retry failure flag					○

A→Q/L conversion

No.	Name	Qn(H)	QnPH	QnU	LCPU	Remarks
SM1000	Blown fuse	○	○	○	○
SM1002	I/O module verification error	○	○	○	○
SM1005	AC DOWN detection	○	○	○	○	(Note 1)
SM1006	Low battery	○	○	○	○
SM1007	Battery low latch	○	○	○	○
SM1008	Self-diagnostic error	○	○	○	○
SM1009	Annunciator detection	○	○	○	○
SM1011	Operation error flag	○	○	○
SM1012	Carry flag	○	○
SM1016	Data memory clear flag	○	○
SM1017	Data memory clear flag	○	○
SM1020-1024	User timing clock No.0-4	○	○	○	○
SM1025	Clock data set request	○	○	○	○
SM1026	Clock data error	○	○	○	○
SM1028	Clock data read request	○	○	○	○
SM1029	Data communication request batch processing	○	○
SM1030	0.1 s clock	○	○	○	○
SM1031	0.2 s clock	○	○	○	○
SM1032	1 s clock	○	○	○	○
SM1033	2 s clock	○	○	○	○
SM1034	2n s clock (1 min clock)	○	○	○	○
SM1036	Always ON	○	○	○	○
SM1037	Always OFF	○	○	○	○
SM1038	ON for 1 scan only after RUN	○	○	○	○
SM1039	RUN flag (OFF for one scan only after RUN)	○	○	○	○
SM1040	PAUSE enable coil	○	○
SM1041	PAUSE status contact	○	○	○	○
SM1042	STOP status contact	○	○	○	○
SM1043	Sampling trace completed	○	○	○	○
SM1045	Watchdog timer (WDT) reset	○	○
SM1046	Sampling trace	○	○	○	○
SM1047	Sampling trace preparation	○	○
SM1049	Output character count switching	○	○
SM1051	CHG instruction execution disable	○	○
SM1052	SEG instruction switching	○	○
SM1056	Main side P.I set request	○	○
SM1057	Sub (1) side P.I set request	○	○
SM1058	Main side P.I set completed	○	○
SM1059	Sub side P.I set completed	○	○
SM1060	Sub 2 side P.I set request	○	○
SM1061	Sub 3 side P.I set request	○	○
SM1070	A8UPU/A8PUJ*3 search time	○	○
SM1084	Error check	○	○
SM1091	Operation error detail flag	○	○
SM1100	SFC program present/absent	○	○
SM1101	SFC program start/stop	○	○
SM1102	SFC program start status	○	○
SM1103	Continuous transition present/absent	○	○
SM1104	Continuous transition prevention flag	○	○
SM1108	Step transition watchdog timer start (corresponds to SD90)	○	○
SM1109	Step transition watchdog timer start (corresponds to SD91)	○	○
SM1110	Step transition watchdog timer start (corresponds to SD92)	○	○
SM1111	Step transition watchdog timer start (corresponds to SD93)	○	○
SM1112	Step transition watchdog timer start (corresponds to SD94)	○	○
SM1113	Step transition watchdog timer start (corresponds to SD95)	○	○
SM1114	Step transition watchdog timer start (corresponds to SD96)	○	○
SM1196	Operation output at block stop	○	○
SM1197	Blown fuse, I/O verification error display switching	○	○
SM1198	Blown fuse, I/O verification error display switching	○	○
SM1199	Data recovery of online sampling trace/status latch	○	○

(Note 1) The contents vary by model. Check the manual for details.

Built-in Ethernet port QCPU, built-in Ethernet port LCPU, built-in Ethernet function

No.	Name	Set by	QnU	QnUDV	QnUDPV	LCPU	iQ-R
SM1258	MELSOFT connection extended setting network No., station No. valid flag	S		○	○
SM1270	Time setting function (SNTP client) execution	U	○			○
SM1273	Clear cumulative count of remote password mismatches	U	○			○
SM1292	IP address storage area write request	U	○			○
SM1293	IP address storage area write completed	S	○			○
SM1294	IP address storage area write error	S	○			○
SM1295	IP address storage area clear request	U	○			○
SM1296	IP address storage area clear completed	S	○			○
SM1297	IP address storage area clear error	S	○			○
SM1298	FTP client connection status	S				○
SM1512	Enable FTP server function file path name switching setting						○
SM1513	FTP server function file path name switching setting error						○
SM1520	IP address storage area write request						○
SM1521	IP address storage area write error						○
SM1522	IP address storage area clear request						○
SM1523	IP address storage area clear error						○
SM1524	Initial processing normal completion status						○
SM1525	Initial processing error completion status						○

Communication protocol function

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SM1332	Built-in/adapter serial communication protocol ready	S			○
SM1333	Built-in/adapter serial communication protocol setting check request	S/U			○
SM1334	Built-in/adapter serial communication protocol RS-422/485 echo back enable/disable specification	U			○
SM1354	Built-in Ethernet communication protocol ready	S	○	○	○	○	iQ-R: CPU module restore execution request
SM1355	Built-in Ethernet communication protocol setting check request	S/U	○	○	○

iQ Sensor Solution

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R
SM1360	iQ Sensor Solution backup/restore right of use request					○
SM1361	iQ Sensor Solution backup request					○
SM1362	iQ Sensor Solution backup normal completion					○
SM1363	iQ Sensor Solution backup error completion					○
SM1364	iQ Sensor Solution restore request					○
SM1365	iQ Sensor Solution restore normal completion					○
SM1366	iQ Sensor Solution restore error completion					○
SM1367	iQ Sensor Solution backup/restore abort request					○
SM1435	iQ Sensor Solution backup/restore execution enable	S/U	○	○	○
SM1436	iQ Sensor Solution backup request	S/U	○	○	○
SM1437	iQ Sensor Solution backup normal completion	S	○	○	○
SM1438	iQ Sensor Solution backup error completion	S	○	○	○
SM1439	iQ Sensor Solution restore request	S/U	○	○	○
SM1440	iQ Sensor Solution restore normal completion	S	○	○	○
SM1441	iQ Sensor Solution restore error completion	S	○	○	○
SM1442	iQ Sensor Solution backup/restore abort request	S	○	○	○
SM1445	iQ Sensor Solution backup/restore bridge area extension support flag	S	○	○

FTP client (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM1392	FTP client connection status													○

Global labels (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM1398	Operation setting during global label allocation information update													○

Event history function (iQ-R additional items)

No.	Name	iQ-R
SM1464	Event history save restriction status	○
SM1466	CPU module event history save restriction status (minor error)	○
SM1467	CPU module event history save restriction status (information, warning)	○

Memory dump function (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM1472	Memory dump executing													○
SM1473	Memory dump completed													○

CPU module database access function (iQ-R additional items)

No.	Name	iQ-R
SM1497	CPU module database storage memory card free space flag	○
SM1498	CPU module database startup completion flag	○
SM1499	CPU module database startup failure	○

Process control instructions

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SM1500	Hold mode	U					○	○			○
SM1501	Hold mode	U					○	○			○

Redundant system (own system CPU information)

No.	Name	Set by	QnPRH	iQ-R	Remarks
SM1510	Operating mode	S	○
SM1511	System A identification flag	S	○
SM1512	System B identification flag	S	○	○	iQ-R: Enable FTP server function file path name switching setting
SM1513	Debug mode operating	S	○	○	iQ-R: FTP server function file path name switching setting error
SM1515	Control system identification flag	S	○
SM1516	Standby system identification flag	S	○
SM1517	CPU module startup status	S	○
SM1518	ON for one scan only after switching from standby to control system	S	○
SM1519	Previous control system identification flag	S	○
SM1520	Block 1	S/U	○	○	iQ-R: IP address storage area write request
SM1521	Block 2	S/U	○	○	iQ-R: IP address storage area write error
SM1522	Block 3	S/U	○	○	iQ-R: IP address storage area clear request
SM1523	Block 4	S/U	○	○	iQ-R: IP address storage area clear error
SM1524	Block 5	S/U	○	○	iQ-R: Initial processing normal completion status
SM1525	Block 6	S/U	○	○	iQ-R: Initial processing error completion status
SM1526-1535	Blocks 7-16	S/U	○
SM1536	Block 17	S/U	○	○	iQ-R: Cyclic transmission status
SM1537-1539	Blocks 18-20	S/U	○
SM1540	Block 21	S/U	○	○	iQ-R: Data link status
SM1541-1583	Blocks 22-64	S/U	○
SM1590	System switching from network module presence flag	S	○
SM1591	Standby system error detection disable flag at system switching	U	○
SM1592	Manual switching enable flag	U	○
SM1593	Access setting to extension base units of the standby CPU	U	○
SM1595	Memory copy from control to standby system start flag	U	○
SM1596	Memory copy from control to standby system executing flag	S	○
SM1597	Memory copy from control to standby system completion flag	S/U	○
SM1598	Memory copy from control to standby system standard ROM copy flag	U	○

SM1510 to SM1599 are valid only in redundant systems. In stand-alone systems, they are all OFF.

Redundant system (other system CPU information)

No.	Name	Set by	QnPRH
SM1600	Other system error flag	S	○
SM1610	Other system diagnostic error presence	S	○
SM1611	Other system self-diagnostic error presence	S	○
SM1615	Other system error common information presence	S	○
SM1626	Other system error individual information presence	S	○
SM1649	Standby system error cancel command	U	○

SM1600 to SM1649 are valid only in backup mode of redundant systems. They are invalid in separate mode. In stand-alone systems, SM1600 to SM1649 are all OFF.

E-mail send/receive function

No.	Name	Set by	LCPU
SM1659	E-mail function MC protocol command processing flag	S	○
SM1660	E-mail function MC protocol command error flag	S	○
SM1661	Mail address backup processing flag	S	○
SM1662	Received mail presence flag	S	○

Redundant system (tracking)

No.	Name	Set by	QnPRH
SM1700	Transfer trigger completion flag	S	○
SM1709	User switching disable/enable setting during online change redundant tracking	S/U	○
SM1710	Device memory tracking transfer presence during online change redundant tracking	U	○
SM1712-1775	Blocks 1-64	S	○

SM1700 to SM1799 are valid in both backup mode and separate mode. In stand-alone systems, they are all OFF.

Redundant power supply module information

No.	Name	Set by	Qn(H)	QnPH	QnPRH	QnU
SM1780	Power-off detection flag	S	○	○	○	○
SM1781	Power supply failure detection flag	S	○	○	○	○
SM1782	Momentary power failure detection flag for power supply 1	S	○	○	○	○
SM1783	Momentary power failure detection flag for power supply 2	S	○	○	○	○

CC-Link IE Field Network Basic function

No.	Name	Set by	QnUDV	QnUDPV	LCPU
SM1700	Cyclic transmission status	S	○	○	○
SM1704	Data link status	S	○	○	○
SM1718	Reserved station specification status	S	○	○	○
SM1741	Diagnostic information display request	S/U	○	○	○

Built-in I/O function

No.	Name	Set by	LCPU
SM1840	Axis 1 BUSY	S	○
SM1841	Axis 1 positioning complete	S	○
SM1842	Axis 1 home position return request	S	○
SM1843	Axis 1 home position return complete	S	○
SM1844	Axis 1 speed 0	S	○
SM1845	Axis 1 error occurrence	S	○
SM1846	Axis 1 warning occurrence	S	○
SM1847	Axis 1 start during operation	S/U	○
SM1848	Axis 1 start instruction executing	S	○
SM1850	Axis 1 error reset	U	○
SM1851	Axis 1 home position return request OFF request	U	○
SM1852	Axis 1 speed/position switching enable	U	○
SM1860	Axis 2 BUSY	S	○
SM1861	Axis 2 positioning complete	S	○
SM1862	Axis 2 home position return request	S	○
SM1863	Axis 2 home position return complete	S	○
SM1864	Axis 2 speed 0	S	○
SM1865	Axis 2 error occurrence	S	○
SM1866	Axis 2 warning occurrence	S	○
SM1867	Axis 2 start during operation	S/U	○
SM1868	Axis 2 start instruction executing	S	○
SM1870	Axis 2 error reset	U	○
SM1871	Axis 2 home position return request OFF request	U	○
SM1872	Axis 2 speed/position switching enable	U	○
SM1880	CH1 counter value large No.1	S	○
SM1881	CH1 counter value coincidence No.1	S	○
SM1882	CH1 counter value small No.1	S	○
SM1883	CH1 counter value large No.2	S	○
SM1884	CH1 counter value coincidence No.2	S	○
SM1885	CH1 counter value small No.2	S	○
SM1886	CH1 external preset (phase Z) request detection	S	○
SM1887	CH1 error occurrence	S	○
SM1888	CH1 warning occurrence	S	○
SM1890	CH1 coincidence signal No.1 reset command	U	○
SM1891	CH1 coincidence signal No.2 reset command	U	○
SM1892	CH1 coincidence output enable command	U	○
SM1893	CH1 preset command	U	○
SM1894	CH1 down count command	U	○
SM1895	CH1 count enable command	U	○
SM1896	CH1 counter function selection start command	U	○
SM1897	CH1 external preset (phase Z) request detection reset command	U	○
SM1898	CH1 pulse measurement start command	U	○
SM1899	CH1 error reset command	U	○
SM1900	CH2 counter value large No.1	S	○
SM1901	CH2 counter value coincidence No.1	S	○
SM1902	CH2 counter value small No.1	S	○
SM1903	CH2 counter value large No.2	S	○
SM1904	CH2 counter value coincidence No.2	S	○
SM1905	CH2 counter value small No.2	S	○
SM1906	CH2 external preset (phase Z) request detection	S	○
SM1907	CH2 error occurrence	S	○
SM1908	CH2 warning occurrence	S	○
SM1910	CH2 coincidence signal No.1 reset command	U	○
SM1911	CH2 coincidence signal No.2 reset command	U	○
SM1912	CH2 coincidence output enable command	U	○
SM1913	CH2 preset command	U	○
SM1914	CH2 down count command	U	○
SM1915	CH2 count enable command	U	○
SM1916	CH2 counter function selection start command	U	○
SM1917	CH2 external preset (phase Z) request detection reset command	U	○
SM1918	CH2 pulse measurement start command	U	○
SM1919	CH2 error reset command	U	○

CPU module backup/restore function

No.	Name	Set by	QnUDV	QnUDPV	iQ-R
SM1350	CPU module backup executing flag				○
SM1351	CPU module backup execution request				○
SM1353	CPU module restore executing flag				○
SM1356	CPU module automatic backup retry executing flag				○
SM1925	Backup executing flag	S	○	○
SM1926	Backup execution request	S/U	○	○
SM1928	Restore executing flag	S	○	○
SM1929	Restore execution request	S/U	○	○
SM1931	Automatic backup retry executing flag	S	○	○

Data logging

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R
SM1200	Auto logging setting file and registration status					○
SM1201	SD memory card setting file in-use flag					○
SM1202	Data memory setting file in-use flag					○
SM1203	Data logging file transfer stop request					○
SM1210	Data logging setting No.1 data logging preparation					○
SM1211	Data logging setting No.1 data logging start					○
SM1212	Data logging setting No.1 data logging data collecting					○
SM1213	Data logging setting No.1 data logging completed					○
SM1214	Data logging setting No.1 data logging trigger					○
SM1215	Data logging setting No.1 after data logging trigger					○
SM1216	Data logging setting No.1 data logging error					○
SM1217	Data logging setting No.1 data logging data saving					○
SM1218	Data logging setting No.1 logging data save file switching					○
SM1219	Data logging setting No.1 data logging file transfer execution status flag					○
SM1220-SM1229	Data logging setting No.2					○
SM1230-SM1239	Data logging setting No.3					○
SM1240-SM1249	Data logging setting No.4					○
SM1250-SM1259	Data logging setting No.5					○
SM1260-SM1269	Data logging setting No.6					○
SM1270-SM1279	Data logging setting No.7					○
SM1280-SM1289	Data logging setting No.8					○
SM1290-SM1299	Data logging setting No.9					○
SM1300-SM1309	Data logging setting No.10					○
SM1312-SM1321	Data logging setting No.1-10 data logging pause/resume flag					○
SM1938	Data logging resume flag at error stop	U	○	○	○
SM1940	Data logging setting No.1 data logging preparation	S	○	○	○
SM1941	Data logging setting No.1 data logging start	S/U	○	○	○
SM1942	Data logging setting No.1 data logging collecting	S	○	○	○
SM1943	Data logging setting No.1 data logging completed	S	○	○	○
SM1944	Data logging setting No.1 data logging trigger	S/U	○	○	○
SM1945	Data logging setting No.1 after data logging trigger	S	○	○	○
SM1946	Data logging setting No.1 data logging error	S	○	○	○
SM1947	Data logging setting No.1 data logging saving to SD memory card	S	○	○	○
SM1948	Data logging setting No.1 data logging file transfer function execution status flag	S	○	○	○
SM1950～SM1958	Data logging setting No.2		○	○	○
SM1960～SM1968	Data logging setting No.3		○	○	○
SM1970～SM1978	Data logging setting No.4		○	○	○
SM1980～SM1988	Data logging setting No.5		○	○	○
SM1990～SM1998	Data logging setting No.6		○	○	○
SM2000～SM2008	Data logging setting No.7		○	○	○
SM2010～SM2018	Data logging setting No.8		○	○	○
SM2020～SM2028	Data logging setting No.9		○	○	○
SM2030～SM2038	Data logging setting No.10		○	○	○

Special register (SD) list

Diagnostic information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SD0	Diagnostic error	S	○	○	○	○	○	○	○	○	○	○	○
SD1	Diagnostic error occurrence time	S	○	○	○	○	○	○	○	○	○	○	○
SD2	Diagnostic error occurrence time	S	○	○	○	○	○	○	○	○	○	○	○
SD3	Diagnostic error occurrence time	S	○	○	○	○	○	○	○	○	○	○	○
SD4	Error information category	S	○	○	○	○	○	○	○	○	○	○	○
SD5-15	Error common information	S	○	○	○	○	○	○	○	○	○	○		(Note 1)
SD16-26	Error individual information	S	○	○	○	○	○	○	○	○	○	○		(Note 1)
SD5-7	Latest self-diagnostic error occurrence time												○
SD10-25	Self-diagnostic error code												○
SD49	Error detection disable setting												○
SD50	Error reset	U	○	○	○	○	○	○	○	○	○	○
SD51	Battery low latch	S	○	○	○	○	○	○	○	○	○	○
SD52	Low battery	S	○	○	○	○	○	○	○	○	○	○
SD53	AC/DC DOWN detection	S	○	○	○	○	○	○	○	○	○	○	○
SD60	Blown fuse module No.	S	○	○	○	○	○	○	○	○	○	○	○
SD61	I/O module verification error No.	S	○	○	○	○	○	○	○	○	○	○	○
SD62	Annunciator number	S	○	○	○	○	○	○	○	○	○	○	○
SD63	Number of annunciators	S	○	○	○	○	○	○	○	○	○	○	○
SD64-79	Annunciator detection number table	S	○	○	○	○	○	○	○	○	○	○	○
SD80	CHK number	S				○	○	○					○	iQ-R: Detailed information 1 category
SD81	Continuation error cause	S								○	○	○
SD81-111	(1) Program position information												○
SD81-111	(2) Drive No., file name												○
SD81-111	(4) Parameter information												○
SD81-111	(5) System configuration information												○
SD81-111	(6) Count information												○
SD81-111	(7) Time information												○
SD81-111	(24) Failure information												○
SD81-111	(46) CPU backup/restore folder information												○
SD82	Continuation error cause	S								○	○	○		(Note 1)
SD84-85	Continuation error clear	U								○	○	○
SD90-99	Step transition watchdog timer setting (valid only when there is an SFC program)	U				○	○	○
SD100	Transmission speed storage area	S		○	○				○			○
SD101	Communication setting storage area	S		○	○				○			○
SD102	Transmission wait time storage area	S		○	○				○			○
SD105	CH1 transmission speed setting (RS-232)	S				○	○	○	○			○		(Note 1)
SD110	Data send result storage area	S		○	○				○			○
SD111	Data receive result storage area	S		○	○				○			○
SD112	Detailed information 2 category												○
SD113-143	(2) Drive No., file name												○
SD113-143	(3) Annunciator No.												○
SD113-143	(4) Parameter information												○
SD113-143	(5) System configuration information												○
SD118	Battery usage	S							○			○
SD119	Battery life extension factor	S							○			○
SD130-137	Blown fuse module	S	○	○	○
SD150-157	I/O module verification error	S	○	○	○
SD150	Power-off/power supply voltage drop detection status												○
SD151	Power supply failure detection status												○
SD152	Momentary power failure detection count (power supply 1)												○
SD153	Momentary power failure detection count (power supply 2)												○
SD154	Power supply module not recognized status												○
SD180-181	Latest IP packet relay data amount	S							○			○
SD182-183	Maximum IP packet relay data amount	S							○			○

(Note 1) The contents vary by model. Check the manual for details.

System information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SD160	Firmware version												○
SD164-171	Manufacturing information												○
SD200	Switch status	S	○	○	○	○	○	○	○	○	○	○	○	(Note 1)
SD201	LED status	S	○	○	○	○	○	○	○			○	○	(Note 1)
SD202	LED off command	U				○	○	○	○			○		(Note 1)
SD203	CPU operating status	S	○	○	○	○	○	○	○	○	○	○	○
SD204	LED display color	S							○			○		(Note 1)
SD207	LED display priority	U	○	○	○	○	○	○	○			○
SD208	LED display priority	U	○	○	○	○	○	○	○			○
SD209	LED display priority	U	○	○	○	○	○	○	○			○
SD210	Clock data	S/U	○	○	○	○	○	○	○	○	○	○	○
SD211	Clock data	S/U	○	○	○	○	○	○	○	○	○	○	○
SD212	Clock data	S/U	○	○	○	○	○	○	○	○	○	○	○
SD213	Clock data	S/U	○	○	○	○	○	○	○	○	○	○	○
SD214	Clock data												○
SD215	Clock data												○
SD216	Clock data												○
SD218	Time zone setting												○
SD220-227	Display data	S	○	○	○	○	○	○	○	○	○	○
SD228-233	Multiple CPU system information												○
SD235	Module being changed online	S					○	○
SD240	Base mode	S	○	○	○	○	○	○	○	○	○
SD241	Number of extension stages/extension blocks	S	○	○	○	○	○	○	○	○	○	○	○	QCPU: number of extension stages LCPU*9: number of extension blocks iQ-R: number of extension stages
SD242	A/Q base identification / Q base mounted	S	○	○	○	○	○	○	○				○	Qn(H)/QnPH/QnPRH: A/Q base identification Q00J/Q00/Q01: Q base mounted QnU: A/Q base identification iQ-R: Q series module mountable identification
SD243-244	Number of base slots	S	○	○	○	○	○	○	○
SD243	Number of base slots												○
SD244	Number of base slots												○
SD245-246	Number of base slots (mounted status)	S	○	○	○
SD250	Maximum loaded I/O	S	○	○	○	○	○	○	○			○	○	(Note 1)
SD254-259	MELSECNET/10, MELSECNET/H information	S	○	○	○	○	○	○	○	○	○			(Note 1)
SD260-264	MELSECNET/10, MELSECNET/H information	S				○	○	○	○					(Note 1)
SD265-269	MELSECNET/10, MELSECNET/H information	S				○	○	○	○					(Note 1)
SD270-274	MELSECNET/10, MELSECNET/H information	S				○	○	○	○					(Note 1)
SD260	Number of X points assigned (L)												○
SD261	Number of X points assigned (H)												○
SD262	Number of Y points assigned (L)												○
SD263	Number of Y points assigned (H)												○
SD264	Number of M points assigned (L)												○
SD265	Number of M points assigned (H)												○
SD266	Number of B points assigned (L)												○
SD267	Number of B points assigned (H)												○
SD268	Number of SB points assigned (L)												○
SD269	Number of SB points assigned (H)												○
SD270	Number of F points assigned (L)												○
SD271	Number of F points assigned (H)												○
SD272	Number of V points assigned (L)												○
SD273	Number of V points assigned (H)												○
SD274	Number of L points assigned (L)												○
SD275	Number of L points assigned (H)												○
SD276	Number of S points assigned (L)												○
SD277	Number of S points assigned (H)												○
SD280-281	CC-Link error	S				○	○	○					○	(Note 1), iQ-R: number of D points assigned
SD282-283	Device allocation	S								○	○
SD282	Number of W points assigned (L)												○
SD283	Number of W points assigned (H)												○
SD284-285	Device allocation	S								○	○
SD284	Number of SW points assigned (L)												○
SD285	Number of SW points assigned (H)												○
SD286-287	Device allocation	S							○			○
SD288-289	Device allocation	S							○			○
SD288	Number of T points assigned (L)												○
SD289	Number of T points assigned (H)												○
SD290-291	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: number of ST points assigned
SD292-293	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: number of C points assigned
SD294-295	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: number of LT points assigned
SD296-297	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: number of LST points assigned
SD298-299	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: number of LC points assigned
SD300-301	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: number of Z points assigned
SD302-303	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: number of LZ points assigned
SD304	Device assignment (same as the parameter contents)	S	○	○	○	○	○	○	○	○	○	○
SD305	Device assignment (index registers)	S							○			○
SD306-307	Device assignment (same as the parameter contents)	S							○			○	○	iQ-R: number of ZR points assigned
SD308-309	Device assignment (including extended data register (D) and extended link register (W) settings)	S							○			○	○	iQ-R: number of RD points assigned
SD310	Device assignment (including extended data register (D) and extended link register (W) settings)	S							○			○
SD311	Device assignment (including extended data register (D) and extended link register (W) settings)	S							○			○
SD312	File register block No.												○
SD315	Communication processing reserved time	U	○	○	○	○	○	○
SD329	Target block No. for online change of inactive block	S							○			○	○	iQ-R: Target block No. for SFC block online change
SD339	Latch clear function operation setting	S/U								○	○	○
SD340-344	Ethernet information	S	○	○	○	○	○	○	○	○	○	○
SD345-347	Ethernet information	S				○	○	○	○			○
SD348-354	Ethernet information	S				○	○	○	○			○
SD355-361	Ethernet information	S				○	○	○	○			○
SD362-368	Ethernet information	S				○	○	○	○
SD384	System operation setting												○
SD385	System operation setting error cause												○

(Note 1) The contents vary by model. Check the manual for details.

System clock/counter

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R
SD412	1 s counter	S	○	○	○	○	○	○	○	○	○	○	○
SD414	2n s clock setting	U	○	○	○	○	○	○	○	○	○	○	○
SD415	2n ms clock setting	U				○	○	○	○			○	○
SD420	Scan counter	S	○	○	○	○	○	○	○			○	○
SD430	Low-speed scan counter	S				○	○
SD1184	System clock (SM400-403) update at every END setting												○
SD1185	System clock (SM400-403) update at every END setting error cause												○

Fixed cycle function information (iQ-R additional items)

No.	Name	iQ-R
SD480	Inter-module synchronous program (I44) cycle over count	○
SD481	Inter-CPU synchronous program (I45) cycle over count	○
SD484	Inter-CPU synchronous interrupt program execution section excess error count	○
SD518	Initial scan time (ms)	○
SD519	Initial scan time (μs)	○
SD530	Scan program execution time (ms)	○
SD531	Scan program execution time (μs)	○

Scan information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SD500	Executing program No.	S				○	○	○	○			○	○
SD510	Low-speed execution type program No.	S				○	○
SD520	Current scan time	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: Current scan time (ms)
SD521	Current scan time	S	○	○	○	○	○	○	○	○	○	○	○	iQ-R: Current scan time (μs)
SD522	Initial scan time	S				○	○	○	○			○	○	iQ-R: Minimum scan time (ms)
SD523	Initial scan time	S				○	○	○	○			○	○	iQ-R: Minimum scan time (μs)
SD524	Minimum scan time	S	○	○	○	○	○	○	○			○	○	iQ-R: Maximum scan time (ms)
SD525	Minimum scan time	S	○	○	○	○	○	○	○			○	○	iQ-R: Maximum scan time (μs)
SD526	Maximum scan time	S	○	○	○	○	○	○	○			○	○	iQ-R: END processing time (ms)
SD527	Maximum scan time	S	○	○	○	○	○	○	○			○	○	iQ-R: END processing time (μs)
SD528	Current scan time for low-speed execution type programs	S				○	○						○	iQ-R: Constant scan wait time (ms)
SD529	Current scan time for low-speed execution type programs	S				○	○						○	iQ-R: Constant scan wait time (μs)
SD532	Minimum scan time for low-speed execution type programs	S				○	○
SD533	Minimum scan time for low-speed execution type programs	S				○	○
SD534	Maximum scan time for low-speed execution type programs	S				○	○
SD535	Maximum scan time for low-speed execution type programs	S				○	○
SD540	END processing time	S				○	○	○	○			○
SD541	END processing time	S				○	○	○	○			○
SD542	Constant scan wait time	S	○	○	○	○	○	○	○	○	○	○
SD543	Constant scan wait time	S	○	○	○	○	○	○	○	○	○	○
SD544	Low-speed execution type program cumulative execution time	S				○	○
SD545	Low-speed execution type program cumulative execution time	S				○	○
SD546	Low-speed execution type program execution time	S				○	○
SD547	Low-speed execution type program execution time	S				○	○
SD548	Scan program execution time / scan execution type program execution time	S	○	○	○	○	○	○	○			○		(Note 1)
SD549	Scan program execution time / scan execution type program execution time	S	○	○	○	○	○	○	○			○		(Note 1)
SD550	Service interval measurement module	U				○	○	○
SD551	Service interval time	S				○	○	○
SD552	Service interval time	S				○	○	○

(Note 1) The contents vary by model. Check the manual for details.

Display unit information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD581	Display unit language information	S										○

Drive information

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SD600	Memory card type	S				○	○	○	○	○	○	○	○	(Note 1)
SD602	Drive 1 (memory card RAM) capacity	S				○	○	○	○
SD603	Drive 2 (memory card ROM) capacity / drive 2 (memory card SD) capacity	S				○	○	○	○	○	○			(Note 1)
SD604	Memory card usage status	S				○	○	○	○	○	○	○	○	(Note 1) iQ-R: SD memory card (drive 2) usage status
SD606	Drive 2 (memory card SD) capacity	S								○	○	○	○	iQ-R: SD memory card (drive 2) capacity: lower (KB)
SD607	Drive 2 (memory card SD) capacity	S								○	○	○	○	iQ-R: SD memory card (drive 2) capacity: upper (KB)
SD610	SD memory card (drive 2) free space: lower (KB)												○
SD611	SD memory card (drive 2) free space: upper (KB)												○
SD614	Device/label memory (drive 3) usage status												○
SD616	Drive 2 (memory card SD) capacity	S								○	○	○	○	iQ-R: Device/label memory (drive 3) capacity: lower (KB)
SD617	Drive 2 (memory card SD) capacity	S								○	○	○	○	iQ-R: Device/label memory (drive 3) capacity: upper (KB)
SD618	Device/label memory (file storage area) (drive 3) capacity: lower (KB)												○
SD619	Device/label memory (file storage area) (drive 3) capacity: upper (KB)												○
SD620	Drive 3/4 type	S	○	○	○	○	○	○	○			○	○	(Note 1) iQ-R: Data memory (drive 4) usage status
SD622	Drive 3 (standard RAM) capacity	S	○	○	○	○	○	○	○			○	○	(Note 1) iQ-R: Data memory (drive 4) capacity: lower (KB)
SD623	Drive 4 (standard ROM) capacity	S	○	○	○	○	○	○	○			○	○	(Note 1) iQ-R: Data memory (drive 4) capacity: upper (KB)
SD624	Drive 3/4 usage status	S	○	○	○	○	○	○	○	○	○	○		(Note 1)
SD626	Extended SRAM cassette capacity identification information												○
SD629	Program memory write (transfer) status												○
SD630	Program memory write count index												○
SD631	Program memory write count index												○
SD633	Data memory write (transfer) status												○
SD634	Project batch save error cause	S										○	○	iQ-R: Data memory write count index
SD635	Project batch save status	S										○	○	iQ-R: Data memory write count index
SD636	Project batch load error cause	S										○
SD637	Project batch load status	S										○
SD638	Directory batch delete end status	S								○	○
SD639	Directory batch delete status	S								○	○
SD640	File register drive	S	○	○	○	○	○	○	○			○	○	iQ-R: Internal buffer free area usage status
SD641	File register file name	S	○	○	○	○	○	○	○			○		(Note 1)
SD642	File register file name	S	○	○	○	○	○	○	○			○	○	(Note 1) iQ-R: Internal buffer capacity lower (KB)
SD643	File register file name	S	○	○	○	○	○	○	○			○	○	(Note 1) iQ-R: Internal buffer capacity upper (KB)
SD644	File register file name	S	○	○	○	○	○	○	○			○	○	(Note 1) iQ-R: Internal buffer free area capacity lower (KB)
SD645	File register file name	S	○	○	○	○	○	○	○			○	○	(Note 1) iQ-R: Internal buffer free area capacity upper (KB)
SD646	File register file name	S	○	○	○	○	○	○	○			○		(Note 1)
SD647	File register capacity	S	○	○	○	○	○	○	○			○		(Note 1)
SD648	File register block No.	S	○	○	○	○	○	○	○			○	○	iQ-R: Function memory capacity lower (KB)
SD649	Function memory capacity upper (KB)												○
SD650	Comment drive	S				○	○	○	○			○	○	iQ-R: Function memory free area capacity lower (KB)
SD651	Comment file name	S				○	○	○	○			○	○	iQ-R: Function memory free area capacity upper (KB)
SD652	Comment file name	S				○	○	○	○			○	○	iQ-R: Function memory clear error cause
SD653	Comment file name	S				○	○	○	○			○	○	iQ-R: Data memory file transfer error cause
SD654	Comment file name	S				○	○	○	○			○
SD655	Comment file name	S				○	○	○	○			○
SD656	Comment file name	S				○	○	○	○			○
SD660-666	Boot operation specified file	S				○	○	○	○			○
SD670	Parameter valid drive information	S							○			○		(Note 1)
SD671	Latch data backup function status	S							○			○
SD672-675	Backup information	S							○			○
SD676-679	Backup data restore information	S							○			○
SD681	Program memory write (transfer) status	S							○			○
SD682	Program memory write count index	S							○			○
SD683	Program memory write count index	S							○			○
SD686	Standard ROM write (transfer) status	S							○			○
SD687	Standard ROM write count index	S							○			○
SD688	Standard ROM write count index	S							○			○
SD689	Backup error cause	S							○			○
SD690	Backup status	S							○			○
SD691	Backup execution status	S							○			○
SD692	Restore error cause	S							○			○
SD693	Restore status	S							○			○
SD694	Restore execution status	S							○			○
SD695	Write instruction execution count specification to standard ROM	U							○			○
SD696-697	Memory card free space / memory card free space at backup execution	S							○	○	○	○
SD698-699	Backup data capacity	S							○			○

(Note 1) The contents vary by model. Check the manual for details.

Instruction related

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SD705	Mask pattern	U	○	○	○	○	○	○
SD706	Mask pattern	U	○	○	○	○	○	○
SD710	Data logging file name addition status	S								○	○
SD711	Data logging file name addition instruction error status	S								○	○
SD712	Data logging file name addition instruction next execution enable status	S								○	○
SD715	IMASK instruction mask pattern	S	○	○	○	○	○	○	○	○	○	○
SD716	IMASK instruction mask pattern	S	○	○	○	○	○	○	○	○	○	○
SD717	IMASK instruction mask pattern	S	○	○	○	○	○	○	○	○	○	○
SD718	Accumulator	S/U	○	○	○	○	○	○	○	○	○	○
SD719	Accumulator	S/U	○	○	○	○	○	○	○	○	○	○
SD720	PLOADP instruction program No. specification	U				○	○
SD738-SD769	Message storage	S				○
SD757	Current interrupt priority												○
SD758	Interrupt disable priority setting												○
SD760	Unicode text file line number (lower)												○
SD761	Unicode text file line number (upper)												○
SD771	Write instruction execution count specification to data memory												○
SD774	PID limit setting (for complete derivative)	U	○	○	○								○	iQ-R: Data table sort instruction execution status
SD774-SD775	PID limit setting (for complete derivative)	U				○		○	○			○		(Note 1)
SD775	Refresh processing selection when COM instruction is executed												○
SD778	Refresh processing selection when COM/CCOM instruction is executed	U	○	○	○	○	○	○	○			○		(Note 1)
SD781-SD785	IMASK instruction mask pattern	S	○	○	○									(Note 1)
SD781-SD793	IMASK instruction mask pattern	S				○	○	○	○			○		(Note 1)
SD792-SD793	PID limit setting (for complete derivative)												○	(Note 1)
SD794	PID limit setting (for incomplete derivative)	U	○	○	○									(Note 1)
SD794-SD795	PID limit setting (for incomplete derivative)	U				○		○	○			○	○	(Note 1)
SD796	Multiple CPU high-speed communication dedicated instruction maximum number of used blocks setting (for CPU No.1)	U							○				○
SD797	Multiple CPU high-speed communication dedicated instruction maximum number of used blocks setting (for CPU No.2)	U							○				○
SD798	Multiple CPU high-speed communication dedicated instruction maximum number of used blocks setting (for CPU No.3)	U							○				○
SD799	Multiple CPU high-speed communication dedicated instruction maximum number of used blocks setting (for CPU No.4)	U							○				○

(Note 1) The contents vary by model. Check the manual for details.

Debug

No.	Name	Set by	QnU	LCPU	iQ-R
SD830	Real-time monitor buffer free space	S		○
SD840	Debug function usage status	S	○	○
SD1488	Debug function usage status				○

Firmware update function (iQ-R additional items)

No.	Name	iQ-R
SD904	Version after update (network)	○
SD905	Version before update (network)	○
SD906	Version after update (network)	○
SD907	Version before update (network)	○
SD924	Execution time (month)	○
SD925	Execution time (day)	○
SD926	Execution time (hour)	○
SD929	Execution time (day of week)	○
SD930	Version after update (CPU)	○
SD931	Version before update (CPU)	○
SD932	Target	○
SD933	Result	○

Latch area

No.	Name	Set by	QnU	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SD909	Auto loading target folder No.	S/U				○
SD910	CPU module backup/restore function (backup function)	U		○	○
SD912	CPU module backup/restore function (backup function)	U		○	○		○	iQ-R: Execution time (year)
SD913	CPU module backup/restore function (backup function)	U		○	○		○	iQ-R: Execution time (month)
SD914	CPU module backup/restore function (backup function)	U		○	○		○	iQ-R: Execution time (day)
SD915	CPU module backup/restore function (backup function)	U		○	○		○	iQ-R: Execution time (hour)
SD916	CPU module backup/restore function (backup function)	S		○	○		○	iQ-R: Execution time (minute)
SD917	CPU module backup/restore function (restore function)	U		○	○		○	iQ-R: Execution time (second)
SD918	CPU module backup/restore function (restore function)	U		○	○		○	iQ-R: Execution time (day of week)
SD919	CPU module backup/restore function (restore function)	U		○	○		○	iQ-R: Version after update (CPU)
SD920	CPU module backup/restore function (restore function)	U		○	○		○	iQ-R: Version before update (CPU)
SD921	CPU module backup/restore function (restore function)	U		○	○		○	iQ-R: Target
SD922	CPU module backup/restore function (restore function)	S		○	○		○	iQ-R: Execution result
SD923	CPU module backup/restore function (restore function)	S		○	○		○	iQ-R: Execution time (year)
SD927	Device information when "RAM ERROR" (error code: 1161) occurs	S	○			○	○	iQ-R: Execution time (minute)
SD928	Device information when "RAM ERROR" (error code: 1161) occurs	S	○			○	○	iQ-R: Execution time (second)
SD940	Stop instruction at file change in label specification						○
SD944	CPU module backup/restore backup function (backup function setting)						○
SD947	CPU module backup/restore backup function (automatic backup date/time setting (day))						○
SD948	CPU module backup/restore backup function (automatic backup date/time setting (hour))						○
SD949	CPU module backup/restore backup function (automatic backup date/time setting (minute))						○
SD950	CPU module backup/restore backup function (automatic backup time/day of week setting (hour))						○
SD951	CPU module backup/restore backup function (automatic backup time/day of week setting (minute))						○
SD952	CPU module backup/restore backup function (automatic backup time/day of week setting (day of week))						○
SD953	CPU module backup/restore backup function (backup error cause)						○
SD954	CPU module backup/restore restore function (restore target data setting)						○
SD955	CPU module backup/restore restore function (restore function setting)						○
SD956	CPU module backup/restore restore function (restore target date folder setting)						○
SD957	CPU module backup/restore restore function (restore target date folder setting)						○
SD958	CPU module backup/restore restore function (restore target number folder setting)						○
SD959	CPU module backup/restore restore function (restore error cause)						○
SD960	CPU module backup/restore backup function (backup data count upper limit status)						○

Redundant CPU information (own system CPU information)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD952	Memory copy from control to standby system execution history	S						○						○	iQ-R: CPU module backup/restore backup function (automatic backup time/day of week setting (day of week))

Remote password cumulative count

No.	Name	Set by	QnU	LCPU
SD979	MELSOFT direct connection	S	○	○
SD980-SD995	Connections 1-16	S	○	○
SD997	MELSOFT connection UDP port	S	○	○
SD998	MELSOFT connection TCP port	S	○	○
SD999	FTP communication port	S	○	○

A→Q/L conversion

No.	Name	Qn(H)	QnPH	QnU	LCPU
SD1000	Blown fuse	○	○	○	○
SD1001	Blown fuse	○	○
SD1002	I/O module verification error	○	○	○	○
SD1005	AC DOWN counter	○	○	○	○
SD1008	Self-diagnostic error	○	○	○	○
SD1009	Annunciator detection	○	○	○	○
SD1010	Error step	○	○
SD1011	Error step	○	○
SD1014	I/O control method	○	○
SD1015	CPU operating status	○	○	○	○
SD1016	Program number	○	○
SD1017	Scan time	○	○	○	○
SD1018	Scan time	○	○	○	○
SD1019	Scan time	○	○	○	○
SD1020	Constant scan	○	○
SD1021	Scan time	○	○	○	○
SD1022	1 s counter	○	○	○	○
SD1025-1028	Clock data	○	○	○	○
SD1035	Extended file register	○	○	○	○
SD1036	For extended file register device number specification	○	○
SD1037	For extended file register device number specification	○	○
SD1038	LED display priority	○	○
SD1039	LED display priority	○	○
SD1044	For sampling trace	○	○
SD1049	Work area for SFC program execution	○	○
SD1050	SFC program error number	○	○
SD1051	Error block	○	○
SD1052	Error step	○	○
SD1053	Error transition	○	○
SD1054	Error sequence step	○	○
SD1055	Status latch execution step No.	○	○
SD1072	PC communication check	○	○
SD1085	Time check time	○	○
SD1090	Microcomputer subroutine INPUT data area first device No.	○	○
SD1091	Instruction error	○	○	○	○
SD1094	First I/O number of replaced I/O module	○	○
SD1095	DIP switch information	○	○
SD1100-1107	Blown fuse module	○	○	○	○
SD1108-1114	Step transition watchdog timer setting	○	○
SD1116-1123	I/O module verification error	○	○	○	○
SD1124	Number of annunciators detected	○	○	○	○
SD1125-1132	Annunciator detection number	○	○	○	○

Built-in Ethernet port QCPU, built-in Ethernet port LCPU, built-in Ethernet function

No.	Name	Set by	QnU	QnUDV	QnUDPV	LCPU	iQ-R
SD1256	Total number of files processed	S				○
SD1257	Number of files processed	S				○
SD1258	MELSOFT connection extended setting network No.	S		○	○
SD1259	MELSOFT connection extended setting station No.	S		○	○
SD1260-1265	IP address in use	S	○			○
SD1266-1268	MAC address	S	○			○
SD1270	Time setting function (operation result)	S	○			○
SD1271-1274	Time setting function (execution time)	S	○			○
SD1275	Time setting function (response time)	S	○			○
SD1276	Forced connection invalidation	U	○			○
SD1277	Forced connection invalidation	U	○			○
SD1282	Open completion signal	S	○			○
SD1284	Open request signal	S	○			○
SD1286	Reception status signal	S	○			○
SD1288	Built-in Ethernet port connection status	S	○			○
SD1289	Ethernet basic timeout time	U	○			○
SD1292-1297	IP address setting	S/U	○			○
SD1298	IP address storage area write error cause	S	○			○
SD1299	IP address storage area clear error cause	S	○			○
SD1395	Built-in Ethernet port counter	S	○
SD1504	Open completion signal						○
SD1505	Open request signal						○
SD1506	Socket communication reception status signal						○
SD1512	FTP server function file path name switching setting						○
SD1513	FTP server function file path name switching setting error cause						○
SD1514	FTP server function file path name switching setting status						○
SD1518	IP address setting (network No.)						○
SD1519	IP address setting (station No.)						○
SD1520	IP address setting (IP address (lower))						○
SD1521	IP address setting (IP address (upper))						○
SD1522	IP address setting (subnet mask pattern (lower))						○
SD1523	IP address setting (subnet mask pattern (upper))						○
SD1524	IP address setting (default gateway IP address (lower))						○
SD1525	IP address setting (default gateway IP address (upper))						○
SD1526	IP address storage area write error cause						○
SD1527	IP address storage area clear error cause						○

Communication protocol function

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R	Remarks
SD1337-1340	Built-in/adapter serial communication protocol setting data error information	S			○
SD1341	Number of built-in/adapter serial protocols registered	S			○
SD1342-1349	Built-in/adapter serial protocol registration presence	S			○
SD1351	Built-in/adapter serial communication protocol function error code	S			○	○	iQ-R: CPU module backup/restore progress
SD1359-1362	Built-in Ethernet protocol setting data error information	S	○	○	○
SD1363	Number of built-in Ethernet protocols registered	S	○	○	○	○	iQ-R: iQ Sensor Solution backup/restore target folder number setting
SD1365-1372	Built-in Ethernet protocol registration presence	S	○	○	○
SD1381	Built-in Ethernet communication protocol function error code	S	○	○	○	○	iQ-R: iQ Sensor Solution backup/restore error detailed information (target device 1)

Blown fuse module

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1300-1331	Blown fuse module	S				○	○	○	○			○

I/O module verification

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1400-1431	I/O module verification error	S				○	○	○	○			○

iQ Sensor Solution

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R
SD1364	iQ Sensor Solution backup/restore target setting (target module)					○
SD1365	iQ Sensor Solution backup/restore target setting (target device 1)					○
SD1366	iQ Sensor Solution backup/restore target setting (target device 2)					○
SD1367	iQ Sensor Solution backup/restore operation setting					○
SD1368	iQ Sensor Solution backup/restore communication timeout time					○
SD1371	iQ Sensor Solution backup/restore execution status (total number of target devices)					○
SD1372	iQ Sensor Solution backup/restore execution status (number of devices completed normally)					○
SD1373	iQ Sensor Solution backup/restore execution status (number of devices completed with error)					○
SD1374	iQ Sensor Solution backup/restore execution status (progress per device)					○
SD1375	iQ Sensor Solution backup target folder number					○
SD1376	iQ Sensor Solution backup/restore module error cause					○
SD1377	iQ Sensor Solution backup/restore target device error cause					○
SD1378	iQ Sensor Solution backup/restore error target model/execution unit information					○
SD1379	iQ Sensor Solution backup/restore error target folder number information					○
SD1380	iQ Sensor Solution backup/restore error detailed information (target module)					○
SD1382	iQ Sensor Solution backup/restore error detailed information (target device 2)					○
SD1435	iQ Sensor Solution backup/restore use request	S/U	○	○	○
SD1436	iQ Sensor Solution backup/restore right of use acquisition status	S	○	○	○
SD1437	iQ Sensor Solution backup/restore target type/execution unit setting	U	○	○	○
SD1438	iQ Sensor Solution backup/restore target folder number setting	U	○	○	○
SD1439	iQ Sensor Solution backup/restore target setting (target module)	U	○	○	○
SD1440	iQ Sensor Solution backup/restore target setting (target device 1)	U	○	○	○
SD1441	iQ Sensor Solution backup/restore target setting (target device 2)	U	○	○	○
SD1444	iQ Sensor Solution backup/restore operation setting	U	○	○	○
SD1445	iQ Sensor Solution backup/restore communication timeout time	U	○	○	○
SD1446	iQ Sensor Solution backup/restore status	S	○	○	○
SD1447	iQ Sensor Solution backup/restore execution status (total number of target devices)	S	○	○	○
SD1448	iQ Sensor Solution backup/restore execution status (number of devices completed normally)	S	○	○	○
SD1449	iQ Sensor Solution backup/restore execution status (number of devices completed with error)	S	○	○	○
SD1450	iQ Sensor Solution backup/restore execution status (progress per device)	S	○	○	○
SD1451	iQ Sensor Solution backup folder number	S	○	○	○
SD1452	iQ Sensor Solution backup/restore module error cause	S	○	○	○
SD1453	iQ Sensor Solution backup/restore target device detailed error cause	S	○	○	○
SD1454	iQ Sensor Solution backup/restore error target model/execution unit information	S	○	○	○
SD1455	iQ Sensor Solution backup/restore error target folder number information	S	○	○	○
SD1456	iQ Sensor Solution backup/restore error detailed information (target module)	S	○	○	○
SD1457	iQ Sensor Solution backup/restore error detailed information (target device 1)	S	○	○	○
SD1458	iQ Sensor Solution backup/restore error detailed information (target device 2)	S	○	○	○

Interrupt pointer mask pattern (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1400-1463	Interrupt pointer mask pattern													○

Event history function (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1464-1467	Event history save restriction operating module status													○

Memory dump function (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1472	Memory dump error cause													○

Real-time monitor function (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1484	Real-time monitor internal buffer free space													○

CPU module database access function (iQ-R additional items)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1498	CPU module database startup status													○

Process control instructions

No.	Name	Set by	QnPH	QnPRH	QnUDPV
SD1500,SD1501	Execution cycle	U	○	○	○
SD1502	Process control instruction detailed error code	S	○	○	○
SD1503	Process control instruction error location	S	○	○	○
SD1506,SD1507	Dummy device	U	○	○	○
SD1508	Process control instruction function selection	U	○	○	○

Redundant system (own system CPU information)

No.	Name	Set by	QnPRH
SD1585	Redundant system LED status	S	○
SD1588	System switching cause	S	○
SD1589	System switching disable cause	S	○
SD1590	Module No. issuing system switching request from own system network module	S	○
SD1595	Memory copy destination I/O No.	U	○
SD1596	Memory copy status	S	○

SD1510 to SD1599 are valid only in redundant systems. In stand-alone systems, they are all "0".

Redundant system (other system CPU information)

No.	Name	Set by	QnPRH
SD1600	System error information	S	○
SD1601	System switching result	S	○
SD1602	Control system switching instruction argument	S	○
SD1610	Other system diagnostic error	S	○
SD1611-1613	Other system diagnostic error occurrence time	S	○
SD1614	Other system error information category	S	○
SD1615-1625	Other system error common information	S	○
SD1626-1636	Other system error individual information	S	○
SD1649	Standby system error cancel command	S	○
SD1650	Other system operation information	S	○
SD1690	Module No. issuing system switching request from other system network module	S	○

SD1600 to SD1650 are valid only in backup mode of redundant systems and invalid in separate mode. SD1651 to SD1690 are valid in both backup mode and separate mode. In stand-alone systems, SD1600 to SD1690 are all "0".

E-mail send/receive function

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1659	E-mail send language information	U										○
SD1660	E-mail function MC protocol command error code	S										○

Redundant system (tracking information)

No.	Name	Set by	Q00J	Q00	Q01	Qn(H)	QnPH	QnPRH	QnU	QnUDV	QnUDPV	LCPU	L06 L26 L26CPU-BT	iQ-R	Remarks
SD1700	Tracking error detection count	S						○
SD1710	Standby system online change start wait time	S/U						○

SD1700 to SD1779 are valid only in redundant systems. In stand-alone systems, they are all "0".

Redundant power supply module information

No.	Name	Set by	Qn(H)	QnPH	QnPRH	QnU
SD1780	Power-off detection status	S	○	○	○	○
SD1781	Power supply failure detection status	S	○	○	○	○
SD1782	Momentary power failure detection counter for power supply 1	S	○	○	○	○
SD1783	Momentary power failure detection counter for power supply 2	S	○	○	○	○

SD1780 to SD1789 are valid only in redundant power supply systems.

CC-Link IE Field Network Basic function

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R
SD1536-1539	Cyclic transmission status of each station					○
SD1540-1543	Data link status of each station					○
SD1700-1703	Cyclic transmission status of each station	S	○	○	○
SD1704-1707	Data link status of each station	S	○	○	○
SD1716	Total number of connected devices	S	○	○	○
SD1718-1721	Reserved station specification status of each station	S	○	○	○
SD1722-1724	Link scan information	S	○	○	○
SD1726-1728	Link scan information	S	○	○
SD1730-1732	Link scan information	S	○	○
SD1734-1736	Link scan information	S	○	○
SD1741	Diagnostic request information	U	○	○	○
SD1742	Diagnostic information valid/invalid flag	S	○	○	○
SD1743	Diagnostic information 1*4	S	○	○	○
SD1744	Diagnostic information 1*4	S	○	○	○
SD1745	Diagnostic information 1*4	S	○	○	○
SD1746	Diagnostic information 1*4	S	○	○	○
SD1753	Diagnostic information 1*4	S	○	○	○
SD1754	Diagnostic information 1*4	S	○	○	○
SD1758	Diagnostic information 2*4	S	○	○	○
SD1760	Diagnostic information 2*4	S	○	○	○
SD1761	Diagnostic information 2*4	S	○	○	○
SD1762	Diagnostic information 2*4	S	○	○	○
SD1764	Diagnostic information 2*4	S	○	○	○
SD1765	Diagnostic information 2*4	S	○	○	○
SD1766	Diagnostic information 2*4	S	○	○	○
SD1767	Diagnostic information 2*4	S	○	○	○

CPU module backup/restore function

No.	Name	Set by	QnUDV	QnUDPV	iQ-R
SD1350	CPU module backup/restore number of incomplete folders/files				○
SD1353	CPU module backup/restore backup data count upper limit setting				○
SD1925	Number of incomplete backup/restore files	S	○	○
SD1926	Backup/restore progress	S	○	○
SD1928	Backup data count upper limit setting	S/U	○	○

Built-in I/O function

No.	Name	Set by	LCPU
SD1830-SD1833	Input signal function selection status	S	○
SD1834,SD1835	Output signal function selection status	S	○
SD1836	Positioning/high-speed counter function use status	S	○
SD1840,SD1841	Axis 1 feed current value	S	○
SD1842,SD1843	Axis 1 current speed	S	○
SD1844	Axis 1 axis operation status	S	○
SD1845	Axis 1 error code	S	○
SD1846	Axis 1 warning code	S	○
SD1847	Axis 1 external I/O signal	S	○
SD1848,SD1849	Axis 1 travel distance after near-point dog ON	S	○
SD1850	Axis 1 positioning data No. being executed	S	○
SD1860,SD1861	Axis 2 feed current value	S	○
SD1862,SD1863	Axis 2 current speed	S	○
SD1864	Axis 2 axis operation status	S	○
SD1865	Axis 2 error code	S	○
SD1866	Axis 2 warning code	S	○
SD1867	Axis 2 external I/O signal	S	○
SD1868,SD1869	Axis 2 travel distance after near-point dog ON	S	○
SD1870	Axis 2 positioning data No. being executed	S	○
SD1880,SD1881	CH1 current value	S	○
SD1882	CH1 status monitor	S	○
SD1883	CH1 external I/O status monitor	S	○
SD1884	CH1 operation mode monitor	S	○
SD1885	CH1 counter format monitor	S	○
SD1886	CH1 counter function selection monitor	S	○
SD1887	CH1 error code	S	○
SD1888	CH1 warning code	S	○
SD1900,SD1901	CH2 current value	S	○
SD1902	CH2 status monitor	S	○
SD1903	CH2 external I/O status monitor	S	○
SD1904	CH2 operation mode monitor	S	○
SD1905	CH2 counter format monitor	S	○
SD1906	CH2 counter function selection monitor	S	○
SD1907	CH2 error code	S	○
SD1908	CH2 warning code	S	○

Data logging

No.	Name	Set by	QnUDV	QnUDPV	LCPU	iQ-R
SD1200	Data logging function memory usage status					○
SD1203	Data logging file transfer stop information					○
SD1210	Data logging setting No.1 latest saved file number					○
SD1211	Data logging setting No.1 latest saved file number					○
SD1212	Data logging setting No.1 oldest saved file number					○
SD1213	Data logging setting No.1 oldest saved file number					○
SD1214	Data logging setting No.1 internal buffer free space (internal buffer free space size (KB))					○
SD1215	Data logging setting No.1 processing overflow count					○
SD1216	Data logging setting No.1 data logging error cause					○
SD1217	Data logging setting No.1 data logging file transfer error cause					○
SD1220-SD1227	Data logging setting No.2 (same structure as setting No.1)					○
SD1230-SD1237	Data logging setting No.3 (same structure as setting No.1)					○
SD1240-SD1247	Data logging setting No.4 (same structure as setting No.1)					○
SD1250-SD1257	Data logging setting No.5 (same structure as setting No.1)					○
SD1260-SD1267	Data logging setting No.6 (same structure as setting No.1)					○
SD1270-SD1277	Data logging setting No.7 (same structure as setting No.1)					○
SD1280-SD1287	Data logging setting No.8 (same structure as setting No.1)					○
SD1290-SD1297	Data logging setting No.9 (same structure as setting No.1)					○
SD1300-SD1307	Data logging setting No.10 (same structure as setting No.1)					○
SD1940,SD1941	Data logging setting No.1 latest saved file number	S	○	○	○
SD1942,SD1943	Data logging setting No.1 oldest saved file number	S	○	○	○
SD1944	Data logging setting No.1 buffer free space	S	○	○	○
SD1945	Data logging setting No.1 processing overflow count	S	○	○	○
SD1946	Data logging setting No.1 data logging error cause	S	○	○	○
SD1947	Data logging setting No.1 data logging file transfer function error code	S	○	○	○
SD1950-SD1957	Data logging setting No.2	-	○	○	○
SD1960-SD1967	Data logging setting No.3	-	○	○	○
SD1970-SD1977	Data logging setting No.4	-	○	○	○
SD1980-SD1987	Data logging setting No.5	-	○	○	○
SD1990-SD1997	Data logging setting No.6	-	○	○	○
SD2000-SD2007	Data logging setting No.7	-	○	○	○
SD2010-SD2017	Data logging setting No.8	-	○	○	○
SD2020-SD2027	Data logging setting No.9	-	○	○	○
SD2030-SD2037	Data logging setting No.10	-	○	○	○

System monitoring information (iQ-R additional items)

No.	Name	iQ-R
SD2000	Firmware version (for monitoring)	○
SD2001-SD2008	Manufacturing information (for monitoring)	○
SD2009	IP address (for monitoring) (IP address (lower))	○
SD2010	IP address (for monitoring) (IP address (upper))	○
SD2011	Subnet mask pattern (for monitoring) (subnet mask pattern (lower))	○
SD2012	Subnet mask pattern (for monitoring) (subnet mask pattern (upper))	○
SD2013	Default gateway IP address (for monitoring) (default gateway IP address (lower))	○
SD2014	Default gateway IP address (for monitoring) (default gateway IP address (upper))	○
SD2015	MAC address (for monitoring) (MAC address (5th and 6th octets))	○
SD2016	MAC address (for monitoring) (MAC address (3rd and 4th octets))	○
SD2017	MAC address (for monitoring) (MAC address (1st and 2nd octets))	○
SD2018	Network No. (for monitoring)	○
SD2019	Station No. (for monitoring)	○
SD2020	Firmware hash value (for monitoring) (firmware hash value (bytes 3 and 4))	○
SD2021	Firmware hash value (for monitoring) (firmware hash value (bytes 1 and 2))	○
SD2022	Parameter hash value (for monitoring) (parameter hash value (bytes 3 and 4))	○
SD2023	Parameter hash value (for monitoring) (parameter hash value (bytes 1 and 2))	○
SD2024	Program/global label setting hash value (for monitoring) (program/global label setting hash value (bytes 3 and 4))	○
SD2025	Program/global label setting hash value (for monitoring) (program/global label setting hash value (bytes 1 and 2))	○
SD2026	CPU operating status (for monitoring)	○
SD2027	Initial scan time (for monitoring) (initial scan time (ms))	○
SD2028	Initial scan time (for monitoring) (initial scan time (µs))	○
SD2029	Current scan time (for monitoring) (current scan time (ms))	○
SD2030	Current scan time (for monitoring) (current scan time (µs))	○
SD2031	Minimum scan time (for monitoring) (minimum scan time (ms))	○
SD2032	Minimum scan time (for monitoring) (minimum scan time (µs))	○
SD2033	Maximum scan time (for monitoring) (maximum scan time (ms))	○
SD2034	Maximum scan time (for monitoring) (maximum scan time (µs))	○
SD2035	Scan program execution time (for monitoring) (scan program execution time (ms))	○
SD2036	Scan program execution time (for monitoring) (scan program execution time (µs))	○

Source

Created from the appendix "Special Relay List" and "Special Register List" of the Mitsubishi Electric MELSEC Q Series QCPU User's Manual (Hardware Design, Maintenance and Inspection) and the appendix "Special Relay List" and "Special Register List" of the MELSEC iQ-R CPU Module User's Manual.
* Always check the official manuals for detailed specifications.
* The "L06 L26 L26CPU-BT" column is the support column for specific models that were listed separately from the other LCPU series in the original.
* The "iQ-R" column is marked with ○ when the same device number appears in the appendix of the iQ-R manual. On the iQ-R, the same device number may have a different name and use from the Q/L series; in that case it is noted in the remarks column in the form "iQ-R: name".