Hi
Just wondering has anyone had anything like this happen to them?
I have just split a safety cct which previously used a single safety relay to kill power to 10 powerflex40 inverters (connected via Devicenet 22-comm-d)), with power being restored to the inverters 5 at a time once the safety relay is reset.
I now have 2 safety relays, one killing 4 inverters, the other killing 6. Intermittently when the 6 inverter relay was operated while the 4 inv relay was ok, the 4 inverters which should have continued operating correctly, faulted to "F071" (comms fault - Devicenet).
Working on this i have narrowed it down to when one specific inverter (node 7) is killed, it causes the other 9 inverters to show the network/comms fault.
I swapped the DeviceNet adapter on the node 7 inverter - same fault.
Swapped the adapter with its neighbouring drives adapter, leaving nodes the same - fault stays with adapter.
If i remove node 7 from the network (and make it 15 for example) the problem dissapears.
If i set another to node 7, the fault goes to that drive.
Why does killing node 7 fault the network? Why does no other node have this effect? Is there a parameter for this, or is it just a quirk? Please let me know if anyone else has had this problem, or can put forward a theory as to why it does this, i greatley appreciate help or suggestions.
Thanks in advance, and all the best
Guy
Just wondering has anyone had anything like this happen to them?
I have just split a safety cct which previously used a single safety relay to kill power to 10 powerflex40 inverters (connected via Devicenet 22-comm-d)), with power being restored to the inverters 5 at a time once the safety relay is reset.
I now have 2 safety relays, one killing 4 inverters, the other killing 6. Intermittently when the 6 inverter relay was operated while the 4 inv relay was ok, the 4 inverters which should have continued operating correctly, faulted to "F071" (comms fault - Devicenet).
Working on this i have narrowed it down to when one specific inverter (node 7) is killed, it causes the other 9 inverters to show the network/comms fault.
I swapped the DeviceNet adapter on the node 7 inverter - same fault.
Swapped the adapter with its neighbouring drives adapter, leaving nodes the same - fault stays with adapter.
If i remove node 7 from the network (and make it 15 for example) the problem dissapears.
If i set another to node 7, the fault goes to that drive.
Why does killing node 7 fault the network? Why does no other node have this effect? Is there a parameter for this, or is it just a quirk? Please let me know if anyone else has had this problem, or can put forward a theory as to why it does this, i greatley appreciate help or suggestions.
Thanks in advance, and all the best
Guy