Plc Diagnosis Represented As A Ladder Diagram - Siemens SINUMERIK 802D sl Programming And Operating Manual

PLC diagnosis represented as a ladder diagram

Functionality
A PLC user program consists to a large degree of logical operations to realize safety func-
tions and to support process sequences. These logical operations include the linking of vari-
ous 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 of-
fered in the "System" operating area.
Note
It is not possible to edit the program here.
Operating sequence
Press the PLC softkey which is to be found in the "System" operating area.
The project stored in the permanent memory is opened.
Grinding
Programming and Operating manual, 06/2006, 6FC5398-4CP10-0BA0
10
10-1