935
Debugging Instructions Section 3-27
Precautions TRSM(045) is processed as NOP(000) when data tracing is not being per-
formed or when the sampling interval set in the parameters with the CX-Pro-
grammer is not set to sample on TRSM(045) instruction execution.
Do not turn the Sampling Start Bit (A508.15) ON or OFF from the program.
This bit must be turned ON and OFF from the CX-Programmer.
Example The following example shows the overall data trace operation.
Note Trace Memory has a ring structure. Data is stored to the end of the Trace
Memory area and then wraps to the beginning of the area, ending just before
the first valid data sample.
Sampling
Operated from CX-Programmer
(Sampling Start Bit: A508.15)
Trace Start Bit: A508.14
Trace Busy Flag: A508.13
Trace Completed Flag: A508.12
Trace Trigger Monitor Flag: A508.11
Example: word data
Trace Memory
See note.
Valid from here on
Delay
setting
Valid
samples
Trace ends when
Trace Memory is full.
: Execution of TRSM(045)
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