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Problem with clearing alarm F07900

Created by: omoefd at: 7/29/2011 10:51 PM (7 Replies)

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7/29/2011 10:51 PM	Rate (0)
omoefd Posts: 1 Rating: (0)	I have two identical systems, but with one I get the 7900 "Drive : Motor locked/speed controller at its limit" alarm. I have crosschanged between the systems and motor, motorcable, encodercable, encoder, drive_cliq cable and drive module works on the other system. There is no mechanical resistance for the motor and it rotates freely it I turn it with my hands. I have even compared the config of the drive for the two drives and cant find any difference. Really dont know what to try. Anyone have any tips of what else I might try? Best regards, omo
omoefd Posts: 1 Rating: (0)
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7/30/2011 7:38 PM	Rate (0)
ŠΜS Gold Member Joined: 6/7/2010 Last visit: 7/9/2024 Posts: 571 Rating: (37)	Hi, In which system or in which Drive you are getting this alarm no.
	Regards, ŠΜS
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10/12/2012 3:46 PM	Rate (0)
Ziemens Gold Member Joined: 3/2/2007 Last visit: 1/9/2026 Posts: 999 Rating: (5)	kindly, how did you solve this problem ? thanks
	... thank you ...
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2/25/2013 12:04 PM	Rate (0)
dya11 Posts: 1 Rating: (0)	i have aproblem in drive 6sl3120-2te ,it give f07900 fault pleas give me the solution for this problem
dya11 Posts: 1 Rating: (0)
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2/25/2013 4:24 PM	Rate (0)
DenisMor Posts: 344 Rating: (50)	Swapping motor phases when wiring to the drive will cause this to happen.
DenisMor Posts: 344 Rating: (50)
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2/26/2013 8:15 AM	Rate (0)
Deep Bhatt Posts: 241 Rating: (50)	omoefd I have two identical systems, but with one I get the 7900 "Drive : Motor locked/speed controller at its limit" alarm. I have crosschanged between the systems and motor, motorcable, encodercable, encoder, drive_cliq cable and drive module works on the other system. There is no mechanical resistance for the motor and it rotates freely it I turn it with my hands. I have even compared the config of the drive for the two drives and cant find any difference. Really dont know what to try. Anyone have any tips of what else I might try? Best regards, omo You can change either drive phases or encoder tracks on smc if u are using it
Deep Bhatt Posts: 241 Rating: (50)
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2/27/2013 8:44 PM	Rate (0)
zako_ Posts: 895 Rating: (67)	You couldtry tomove the drive in sensorless mode - maybe the drive will move in the wrong direction (phases U V W incorrect), or the sign of the speed value r61 is incorrect for example (you caninverse the tracks with parameters too).
zako_ Posts: 895 Rating: (67)	Last edited by: zako_ at: 2/27/2013 8:46 PM
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3/5/2013 11:29 AM	Rate (0)
Ziemens Gold Member Joined: 3/2/2007 Last visit: 1/9/2026 Posts: 999 Rating: (5)	It could be one or more of the following: damaged power cable power cable and drive cliq cable not connected to the same axis. loose connection in the power connector. power cable phases connected differently on both ends of the cable drive click cable on drive A is connected to motor B
	... thank you ...
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