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11.17 Tracing and recording CPU data on trigger conditions
Easy Book
274 Manual, 03/2014, A5E02486774-AF
11.17
Tracing and recording CPU data on trigger conditions
STEP 7 provides trace and logic analyzer functions with which you can configure variables
for the PLC to trace and record. You can then upload the recorded trace data to your
programming device and use STEP 7 tools to analyze, manage, and graph your data. You
use the Traces folder in the STEP 7 project tree to create and manage traces.
The following figure shows the various steps of the trace feature:
①
Configure the trace in the trace editor of STEP 7. You can configure the data values to record,
the recording duration, the recording frequency, and the trigger condition.
②
Transfer the trace configuration from STEP 7 to the PLC.
③
The PLC executes the program, and when the trigger condition occurs, begins recording the
trace data.
④
Transfer the recorded values from the PLC to STEP 7.
⑤
Use the tools in STEP 7 to analyze the data, display it graphically, and save it.
Note that the trace feature is only available as of V4.0 of the S7-1200 CPU.
See the STEP 7 information system for details about how to program a trace, how to
download the configuration, upload the trace data, and display the data in the logic analyzer.