Creating Sysmac Studio Trace Data with RecSSConvert (2/4)

Record settings

Here the following data is traced, output to files and then imported into Sysmac Studio data trace

Trace data
Data to trace	16 bits, plus one each of INT, DINT, LINT, REAL and LREAL
Number of buffer elements	10,000
Number of buffers	2
Trace period	2ms

The record start flag accumulates data in the first buffer
When data reaches the end of the buffer, it switches to the second buffer and accumulates data
When the buffer switches, the buffer is written to SD with the FileWriteVar instruction

Step 1: Create the Buffers

1-1. Create the buffer structure

RecSSConvert create buffer structure — Sysmac Studio data types

Create the sData structure to hold the data you want to trace
Put the Data structure into a double-buffer structure and set the array to the size needed for buffering
The number of array elements is the buffer size

Structures
Name		Data type	Description
sData		STRUCT	Buffer
	RecTime	DATE_AND_TIME	Time of day
	SamplingNo	UINT	Sampling No.
	Idx	UINT	Index
	B	BOOL[16]	16 BOOLs
	INT16	INT	Integer 16-bit
	INT32	DINT	Integer 32-bit
	INT64	LINT	Integer 64-bit
	R	REAL	Real types
	LR	LREAL	Real, double precision

1-2. Create the buffers

RecSSConvert create buffers — Sysmac Studio create buffers in the variable table

Create the buffer variables named Data0 and Data1
Each is an array of sData structures with 10,000 elements

Step 2: Create the PLC Program

2-1. Add data to the buffer

RecSSConvert data addition ladder — Sysmac Studio data addition ladder

Create a single sData variable named RecData
Turning ON the record start flag (Rec) sets the data to trace into RecData
and the RecData with data set is added to the buffer with the RingBufPut function
Here global variables named Dummy... are used as the data to trace

// Store the data to record in RecData

RecData.RecTime := GetTime();
RecData.SamplingNo := SamplingNo;
RecData.Idx := index;

RecData.B := DummyInputBool;
RecData.INT16 := DummyInputInt16;
RecData.INT32 := DummyInputInt32;
RecData.INT64 := DummyInputInt64;
RecData.R := DummyInputReal;
RecData.LR := DummyInputLReal;

IF DataNo = 0 THEN
Data0[index] := RecData;
ELSE
Data1[index] := RecData;
END_IF;

index := index + 1;
END_FOR;

2-2. When the buffer is full

RecSSConvert when the buffer is full — Sysmac Studio buffer full ladder

When the buffer is full, a file name is created and a command is issued to write the buffer to SD with the FileWriteVar instruction
At the same time the buffer is switched, so recording continues in the other buffer even while the file is being written
Switching and writing are repeated whenever the buffer is full

On the next page

Convert the output files to data trace CSV files with SSConvert