MICROMASTER

Red LED MM440 + Profibus + External 24VDC

Thread Starter: aitorurteaga   Started: 6/8/2012 1:12 PM   Replies: 0

  6/8/2012, 1:12 PM

aitorurteaga Joined 1/30/2012 Last visit: 4/2/2013 Posts: 6 Rating:  (0)

(0)  Hi all, We have a MM440 with a Profibus module. We also have a external 24VDC source, because we want comms keep running even when the drive is not feeded. When the contactor is opened, the LED is green until the DC bus goes to 0V. Then, the LED first turns orange and after a second it goes red. In this sequence, we se an A0503 alarm, but this is "normal" and can be ignored. When we turn to feed the drive, the LED goes green again and comms are restored. We have more drives with the same configuration and don't have any problem. We have tried with a new drive, a new Profibus module, a new 24VDC source, we have checked PE connections whitch are OK, but the problem still remains. Could you help me? === Edited by aitorurteaga @ 6/8/2012 1:34 PM [GMT ] ===

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