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Programming and Operating Manual, 11/2012, 6FC5398-5CP10-3BA0
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SURJUDP
PLC diagnostics
13
13.1 PLC diagnosis represented as a ladder diagram
Functionality
A PLC user program consists to a large degree of logical operations to realize safety
functions and to support process sequences. These logical operations include the linking of
various contacts and relays. As a rule, the failure of a single contact or relay results in a
failure of the whole system/installation.
To locate causes of faults/failures or of a program error, various diagnostic functions are
offered in the "System" operating area.
Operating sequence
Press the "PLC" softkey in the <SYSTEM> operating area.
Press "PLC program".
The project stored in the residual memory is opened.
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