Tim Ganz
Member
I am i need of some sample logic for a comms good / heatbeat between a compact logix plc and a contrologix plc.
I also have a yaskawa drive runnignfrom a compact logix plc and the built in comms fault is disabled because the drive faults on startup due to the fact that our allen bradley 6000 switch takes longer than that to start up and start talking.
We are giving a speed command to the drive over ethernet and I was thinking maybe I could use the speed feedback coming into the plc to somehow do a heartbeat between the plc and drive like if the drive is running and the speed has not changed in so many seconds then alarm?
I have never done anything like this so I am at a loss on how to code it correctly. Does anyone have a example they could maybe post?
I also have a yaskawa drive runnignfrom a compact logix plc and the built in comms fault is disabled because the drive faults on startup due to the fact that our allen bradley 6000 switch takes longer than that to start up and start talking.
We are giving a speed command to the drive over ethernet and I was thinking maybe I could use the speed feedback coming into the plc to somehow do a heartbeat between the plc and drive like if the drive is running and the speed has not changed in so many seconds then alarm?
I have never done anything like this so I am at a loss on how to code it correctly. Does anyone have a example they could maybe post?