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General => Technical support => Topic started by: montyk on August 20, 2008, 07:32:11 AM

Title: Master Reset of Slave PLC
Post by: montyk on August 20, 2008, 07:32:11 AM

I am using an MD2424 as a master controller and using it to set  and read varibles in eight MD888, using the hostlink commands with a RS485 loop and then they control the processes. But I have run in to a porblem were on of the slave MD888 will get bad data loaded into a varible which causes it's program to pause because of a data out of range alarm, if I reset the unit it starts to run again. Is there a command that the Master controller can send to the slave to cause a Master Reset in the slave unit when it can not communicate with the slave unit.

Title: Re:Master Reset of Slave PLC
Post by: support on August 20, 2008, 02:58:32 PM

You can send the "CL" command to the slave to reset it.

Alternatively, in the slave PLC, add a circuit as follow:
      RLY1
|-----||---------------[MaRST]

This way you can turn on RLY1 in the slave to cause it to reset itself.