Drives

[wbaker]

I have an ultra 3000 drive that will run for a few hours and lose the drive enable bit. The program is not stopping the drive. The enable wiring is an E-Stop circuit  that is common to other drives. The other drives are not having the problem. The drive is on a sercos network. We have replaced the drive and the break out board to the enable circuit. What should I check next?

[J Hvidberg]

In the Axis Properties for that axis - Remember to check the "Drive Enable Input Checking" on the "Drive/Motor" tab.

Also remember that this input NOT is a safety input. Go for the Kinetix 6000 with SafeOff to get a Cat3 / Sil2 solution.

[wbaker]

The drive enable input is checked, thank you for the response. I have been checking the drive status bits when the drive stops.

I have noticed that bit 0 (Servo action status ) goes low every time. Bit 1 (Drive Enable Status) goes low about half the time. Bit 11 (Drive Enable Input) is always high.

So I am not losing the input from the E stop circuit like I originally thought. I can not find any information on what might case me to lose the (servo action status bit) without a fault or stop command from the plc.    

[J Hvidberg]

Are you sure that no fault is occuring when the drive stops? 

Try to look at the knowledgebase Answer ID 26830.

What settings do you use in the "Fault Actions" tab under axis properties?

[wbaker]

I am sure that no faults are getting back to the PLC. I monitored all the fault codes for a fault. I have looked at the drive with ultra ware to see if it shows faults. I see 10 faults in the fault history. I know the drive has stopped well over 10 times in the last 2 days. The fault actions tabs are all set to disable drive. 

[tincho]

I had the same problem. In my case it was the loss of one incoming phase.

Martin.