adccommunitymod (AutomationDirect) asked a question.
Can a Slave PLC Sense a Comm Failure?
Created Date: January 17,2007
Created By: dc
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If you have a Master DL-06 simply READING values from a Slave DL-06 through Port 2, is there any way the slave PLC can determine a communication failure. In other words, is there a special bit for Port 2 that I can monitor for a period of time and if the bit does not become true, then the slave PLC can assume there has been a Communication Failure. If there are any suggestions, please pass them my way.
Created Date: January 17,2007
Created by: Andy
There is no special bit in the slave mode but you can build your own watchdog timer. Just have the master set a bit in the slave. Then once the slave acknowledges it have the slave reset it. If the master does not set it within a certain time frame then the slave can consider it a comm failure.
Hope this helps
Created Date: January 17,2007
Created by: dc
If you have a Master DL-06 simply READING values from a Slave DL-06 through Port 2, is there any way the slave PLC can determine a communication failure.
In other words, is there a special bit for Port 2 that I can monitor for a period of time and if the bit does not become true, then the slave PLC can assume there has been a Communication Failure.
If there are any suggestions, please pass them my way.