Siemens SIMATIC TI500 Dokumentacja Pobierz pdf (Strona 234)

100

101

Troubleshooting

9-14

SIMATIC 545/555/575 System Manual

Troubleshooting CPU Fatal Errors (continued)

When a fatal error occurs, the CPU causing the error attempts to do the

following actions:

• SYSFAIL* is asserted on the VMEbus. This action causes all 575 CPUs

in the system to enter the FAULT mode.

• The SYF LED is turned on.

• The PCG LED is turned off.

• The fault relay is opened.

• I/O ports are disabled, discrete outputs are turned off, and word

outputs are held in their last valid state. (This action can be overruled

by a remote base controller configuration option.)

• Communication ports are cleared and re-initialized.

• Applications are reconnected to their local ports.

• Pending or queued tasks are cleared.

575 CPU Responses

to Fatal Errors

1 2 ... 229 230 231 232 233 234 235 236 237 238 239 ... 321 322

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