rankhornjp
Member
Processor: Modicon 140 CPU 652 60
Ethernet Card: 140 NOC 771 01
Device: Eaton C441R
I have set up a starter using the Eaton C441R attached to the OL block. If the starter is ON and I unplug the Ethernet cable (to simulate network failure) the starter will switch OFF. However, when the cable is plugged back up the starter pulls back in. I need the starter to stay OFF after a communication failure.
How can I program this?
I have tried to use the "Comms Failed" fault bit, but it chatters (quickly on/off) the starter upon reestablishing communications. I assume this is due to it taking a scan to update the bits.
I'm thinking of some kind of timer ran test - every 500ms or so it checks to see if it can still communicate. If not, it sets a bit that I can use in the logic to turn off the output. I just don't know where to have it look...
Ethernet Card: 140 NOC 771 01
Device: Eaton C441R
I have set up a starter using the Eaton C441R attached to the OL block. If the starter is ON and I unplug the Ethernet cable (to simulate network failure) the starter will switch OFF. However, when the cable is plugged back up the starter pulls back in. I need the starter to stay OFF after a communication failure.
How can I program this?
I have tried to use the "Comms Failed" fault bit, but it chatters (quickly on/off) the starter upon reestablishing communications. I assume this is due to it taking a scan to update the bits.
I'm thinking of some kind of timer ran test - every 500ms or so it checks to see if it can still communicate. If not, it sets a bit that I can use in the logic to turn off the output. I just don't know where to have it look...
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