WIN Enterprises PL-10510, Руководство пользователя

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Appendix A : Programming the Watchdog Timer
The PL-10510 provides a watchdog timer that resets the CPU or enables LAN
bypass mode. This function ensures greater system reliability in industrial
stand-alone and unmanned environments.
In order to enable the watchdog timer, you have to output the value of the
watchdog timer interval to the controller. The value range is from 01H to FFH,
and the related time watchdog timer interval is 1 sec to 255 sec.
Data Timer interval
00 Disabled
01 1 sec
02 2 sec
* *
* *
FF 255 sec
If you want to disable the watchdog timer, just set the timer interval value to 00H.
After setting the timer interval value, the watchdog timer begins to count down.
You have to refresh the watchdog timer, so that the watchdog timer will return to
its initial value; otherwise, your system will reset after a time-out. Please
reference the sample code (includes in CD) that shows how to set the watchdog
timer.