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7-412
TRACE,TRACER
TRACE
(1) The TRACE instruction turns ON SM803, executes sampling by the number of times set for
"After trigger number of times" in the Trace condition settings, latches the data and stops
sampling trace.
(2) The sampling is stopped if SM801 is turned OFF during the trace execution.
(3) After the TRACE instruction is executed and the trace is completed, SM805 is turned ON.
(4) Once the TRACE instruction is executed, the second and the subsequent TRACE
instructions are ignored.
When the TRACER instruction is executed, the TRACE instruction is enabled again.
TRACER
(1) The TRACER instruction resets the TRACE instruction. When the TRACER instruction is
executed, the TRACE instruction is enabled again.
(2) When the TRACER instruction is executed, SM803 to SM805 are turned OFF.
Remark
1. For details of the trace, refer to the QnUCPU User's Manual (Function
Explanation, Program Fundamentals) or Qn(H)/QnPH/QnPRHCPU User's
Manual (Function Explanation, Program Fundamentals).
2. For trace execution with GX Developer, refer to the GX Developer Operating
Manual.
Operation Error
(1) There are no operation errors associated with the TRACE or TRACER instruction.
Program Example
(1) The following program executes the TRACE instruction when X0 is turned ON, and resets
the TRACE instruction with the TRACER instruction when X1 is turned ON.
[Ladder Mode] [List Mode]
Instruction
Device
Step