Diagnostics And Troubleshooting - Siemens SIMATIC S5-100U System Manual

Simatic s5 series cpu 100/102/103
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5

Diagnostics and Troubleshooting

5.1
Indication of Errors by LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2
CPU Malfunctions
5.2.1
"ISTACK" Analysis Function
5.2.2
Interrupt Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3
Errors during Program Copying . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.4
Explanation of the Mnemonics Used in "ISTACK"
5.3
Program Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1
Locating the Error Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2
Tracing the Program with the "BSTACK" Function
5.4
I/O Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5
System Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.6
The Last Resort
EWA 4NEB 812 6120-02b
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