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General => Technical support => Topic started by: FQ_ONG on May 04, 2006, 03:27:04 AM

Title: Watch Dog Timer (WDT)
Post by: FQ_ONG on May 04, 2006, 03:27:04 AM

What is Watch Dog Timer (WDT)?  ???
How to use Watch Dog Timer (WDT) in T100MD PLC?  ???

Thank You.

Title: Re:Watch Dog Timer (WDT)
Post by: support on May 04, 2006, 09:47:58 AM

Watch Dog Timer is built-in and is already activated. You don't have to configure it. If the CPU hangs because it has executed wrong instruction (due to noise), the WDT will reset the PLC and the CPU will restart. A WDT reset is quite similar to normal power on reset, but you can find out if the PLC is reset by WDT by checking the return value rom STATUS(1) function.