Does the xx7 series have a watchdog relay? How is it activated?

FAQ #100067


Yes. It is activated by calling system function SFC 239 approx.

every 350 ms (320…380ms). Further information is provided in Technical

Information TI 26/353 (Operating system xx7). For detailed information on

programming these functions, consult Manual 26/797. This documentation can be

downloaded under:



xx7 Series / CPU and operating system

Last update: 24.05.2015 04:50

First release: 08.06.2004 14:19

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