MTB_Hardtail
Member
We have approx 100 PF40 conveyors in our building. Occasionally one stops without a fault being sent to the PLC. We reset/start the conveyor and it runs OK.
When I check the PF40 Fault Queue I always see: F4 F71 F4, indicating DC Buss Undervoltage, followed by the Comm Loss. We are using Profibus, and when I run Profitrace, the buss checks out normal.
I'm wondering if the motor startup load can momentarily bring the AC Buss down along with the DC Buss, enough to cause the Comm Card to glitch, resulting in the F71 Fault?
TIA for your feedback...
When I check the PF40 Fault Queue I always see: F4 F71 F4, indicating DC Buss Undervoltage, followed by the Comm Loss. We are using Profibus, and when I run Profitrace, the buss checks out normal.
I'm wondering if the motor startup load can momentarily bring the AC Buss down along with the DC Buss, enough to cause the Comm Card to glitch, resulting in the F71 Fault?
TIA for your feedback...