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MM4 with Profibus and encoder showing P-----------

5/6/2011 1:53 PM	Rate (0)
Jean-Francois Posts: 36 Rating: (0)	Hello I have a foreign customer with a MM440 C frame drive, running a small motor with an encoder feedback. Their is also a Profibus module to have the status word read by a plc It was working fine for a while but now according to the customer, it is showing "P-------" on the display for 30-60 minutes without working properly and then goes back to normal operation. What would cause this issue ?
Jean-Francois Posts: 36 Rating: (0)
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5/6/2011 6:53 PM	Rate (0)
AFP Posts: 7 Rating: (1)	Usually when is not a Hardware problem is because the I/O board isincorrectpluggedinto the drive. Recommendation: Turn Off the dirve, take off the boards and modules, the I/O board, clean the contacts, plug againeverything, power again and try. Take a look in: /tf/WW/en/Posts/38421 Regards.
AFP Posts: 7 Rating: (1)
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5/20/2011 5:43 PM	Rate (0)
Vithani Platinum Expert Joined: 7/8/2009 Last visit: 6/7/2025 Posts: 1977 Rating: (479)	Also have a look at following FAQ http://support.automation.siemens.com/WW/view/en/23623849 Also use search button for Help because there has been plenty of discussion regarding this problem in this forum Devesh
	I dont Like people driving Fast, thats the reason I overtake them ;)
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5/26/2011 6:36 PM	Rate (0)
diwa Silver Member Joined: 9/20/2006 Last visit: 8/1/2025 Posts: 307 Rating: (97)	this could be a problem of theinternal power supply of the drive.

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