PLC commissioning
6.7 Testing the PLC program
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
183
Assignment of values to variables of the PLC user program or of the CPU module.
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Release PA and Activate control values
Assignment of values to I/O outputs of the PLC user program or of the CPU module in the
operating mode STOP.
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Forcing variables
Assigning values to variables of the PLC user program or CPU module that cannot be
overwritten from the PLC user program.
Variable types
The values of the following variable types can be defined or displayed:
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Inputs, outputs, bit memory, timers and counters
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Contents of data blocks
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I/O
The variables that are to be displayed or controlled are grouped in variable tables.
You determine when and how often variables will be monitored or overwritten with values by
defining trigger points and trigger conditions.
Additional test functions
The menu command Target system > ... provides the following additional test functions:
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Displaying accessible devices
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CPU messages ...
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Display force values
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Diagnosing hardware
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Module status ...
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Operating mode ...
6.7.4
Monitor/control using HMI Advanced
PLC status display
The PLC status display of HMI Advanced is used to monitor and control:
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Inputs, outputs, flags, timers, and counters
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Contents of data blocks
The menu of the PLC status display is located at operation path Operating range switchover
> Diagnosis > PLC status.
