Test functions
12.1 Test functions
S7-1500R/H redundant system
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System Manual, 10/2018, A5E41814787-AA
Testing with a data block editor
The data block editor offers different options for monitoring and modifying tags. These
functions directly access the actual values of the tags in the online program. Actual values
are the current values of tags in the CPU work memory at any given moment during program
execution. The following functions for monitoring and modifying are available in the database
editor.
●
Monitor tags online
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Modify individual actual values
●
Create a snapshot of the actual values
Note
Setting data values during commissioning
During plant commissioning, you often need to adjust data values to adapt the program to
local conditions.
The declaration table for data blocks offers some functions for this purpose.
Testing with the LED flash test
In many online dialogs, you can perform an LED flash test. This feature is useful if you are
not sure which device in the hardware configuration corresponds to the device currently
selected in the software.
If you click on the "Flash LED" button in STEP 7 under Online & diagnostics (online access),
an LED flashes on the device currently selected. The RUN/STOP, ERROR, and MAINT
LEDs flash on the CPU. The LEDs flash until you cancel the flash test.
Testing with a trace function
The trace function is used to record the CPU tags, depending on the settable trigger
conditions. Examples of tags are the system and user tags of a CPU. The CPU saves the
recordings. If necessary, you can display the recordings with STEP 7 and evaluate them.
●
Requirement: The storage of measurements on the SIMATIC memory card
(measurements in the device) is not supported for R/H-CPUs.
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Procedure
–
The trace function can be called from the folder of the top CPU in the project tree,
under the name "Traces".
–
In the "Measurements" system folder, double-click to open the recording to display the
measurement. The "Diagram" tab for the measurement opens in the work area.
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Feature to note
–
No trace recordings take place in the primary CPU during the "Finish tasks
(Page 203)" phase in the SYNCUP system state. Trace recording resumes once the
"Finish tasks" phase ends. The recording is identical on both R/H-CPUs. From this
point, trace recording for the two R/H-CPUs is synchronized.
Please also see the FAQs on the Internet
https://support.industry.siemens.com/cs/ww/en/view/102781176
) for testing with the trace
function.
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