Mitsubishi Electric L02SCPU User's Manual And Reference page 150

(c) Execution of a trigger
After completing a trace, execute a trigger.
[Debug]  [Sampling Trace]  [Execute Manual Trigger]
After a trigger is completed, trace results are displayed on "Sampling Trace" window.
The sampling trace can be performed from other stations in the network or serial communication modules. Note that these
functions cannot be simultaneously performed from several sites.
(7) Precautions
(a) Holding and clearing the trace setting
The trace setting (sampling trace file) registered with the CPU module is latched. Even if the CPU module is
powered off and then on or is reset, the sampling trace can be performed again with the trace setting at
registration.
However, the previous trace result cannot be read. Also in the following cases, even when the trigger condition
is established, the condition is not recognized. In these cases, the trace setting must be registered again since
the latched trace setting is cleared (SM800 turns off).
• With the size of a local device in the standard RAM set to be changed, the parameters have been written
to the CPU module and the CPU module is powered off and then on or it is set from STOP to RUN.
• With a sampling trace file corrupted, the CPU module is powered off and then on or it is reset.
(b) Reading trace result
The trace result cannot be read while the CPU module is in the STOP status.
(c) Registering sampling trace when the trigger condition is established.
Even if the trigger condition is established, the sampling trace setting can be registered by the following
procedure.
1.
Turn on SM829 (Forced registration specification of trace setting).
2.
Enable the forced execution registration.
[Debug]  [Sampling Trace]  [Forced Execution Registration Effective...]
For the above cases, start the trace in the status where the trigger condition is not established. With a trigger
condition established, the trigger may not be normally executed.
(d) Specifying a file register
When a file register is selected as a specified device by the detail setting of trace setting, do not change the
block numbers of file register file and file register after trace registration. Trace data may not be normally
sampled.
(e) Performing sampling trace during execution of another sampling trace
The first sampling trace is performed normally. The second sampling trace cannot be performed.
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