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8. DEBUGGING FUNCTION
(c) "Trace Condition"
Select one of the following:
(4) Retrieve the trace results from the CPU module and display them.
1) Read the trace results from the CPU module by using "4. ( ) Read from PC
(Results)" on the "Sampling Trace" screen.
2) Display the trace results by using "4. ( ) Trace Results Display" on the
"Sampling Trace" screen.
NOTE
1) Set sampling trace files in the RAM area of the memory card.
2) It is possible to execute sampling trace from another station in the network, or
from a serial communication module. However, sampling trace cannot be
executed from more than one site at the same time. With the QnACPU,
sampling trace can be executed from only one site at a time.
3) Since the trace condition registered in the CPU module is latched, the
condition data is retained even when the PLC power is turned OFF. The data
can be cleared by performing a latch clear operation using the RUN/STOP
key switch on the QnACPU.
4) The QnACPU must be connected to the peripheral device capable of GPP
functions in order to execute sampling trace.
1) Overwrite Conditions onto CPU's : The trace condition in an existing trace
file is overwritten.
2) Use Condition in CPU : Sampling trace under the condition in the
trace file designated in "2. Sampling
Trace Data" is executed.
POINT
Once the sampling trace has been executed, the second is not executed. To
execute the trace again, execute the STRAR instruction to reset sampling trace.
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