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CU 240E-2 PN F7900

Created by: ashwini_sahoo at: 9/5/2013 9:26 AM (6 Replies)

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9/5/2013 9:26 AM	Rate (0)
ashwini_sahoo Posts: 47 Rating: (0)	What is fault code F7900 on CU 240E-2 PN.
ashwini_sahoo Posts: 47 Rating: (0)
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9/5/2013 9:34 AM	Rate (0)
ChristophD Grandmaster-Expert Joined: 5/12/2006 Last visit: 12/10/2024 Posts: 22474 Rating: (3037)	F07900 (N, A) Drive: Motor blocked/speed controller at its limit Message value: - Drive object: SERVO, SERVO_AC, SERVO_I_AC Reaction: OFF2 (NONE, OFF1, OFF3, STOP1, STOP2) Acknowledge: IMMEDIATELY Cause: Motor has been operating at the torque limit longer than the time specified in p2177 and below the speed threshold in p2175. This signal can also be initiated if the speed actual value is oscillating and the speed controller output repeatedly goes to its limit. See also: p2175, p2177 (Motor blocked delay time) Remedy: - check that the motor can freely move. - check the torque limit: For a positive direction of rotation r1538, for a negative direction of rotation r1539. - check the parameter, message "Motor blocked" and if required, correct (p2175, p2177). - check the inversion of the actual value (p0410). - check the motor encoder connection. - check the encoder pulse number (p0408). - for SERVO with encoderless operation and motors with low power ratings (< 300 W), increase the pulse frequency (p1800). - after de-selecting the "Basic positioner" (EPOS) function mode, check the motoring (p1528) and regenerative (p1529) torque limit and modify again. Reaction upon N: NONE Acknowl. upon N: NONE Reaction upon A: NONE Acknowl. upon A: NONE

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9/5/2013 10:01 AM	Rate (0)
ashwini_sahoo Posts: 47 Rating: (0)	Thanks Christoph My set parameters are p2175 = 120 p2177 = 3.00 Encoder is not connected. please refer some solution. Regards Ashwini
ashwini_sahoo Posts: 47 Rating: (0)
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9/5/2013 10:14 AM	Rate (0)
ChristophD Grandmaster-Expert Joined: 5/12/2006 Last visit: 12/10/2024 Posts: 22474 Rating: (3037)	Hello, to help you, please provide more informations. Which motor and power module you use? Servo or Vector , encoderless or not? Which application? Regards Christoph

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9/5/2013 12:53 PM	Rate (0)
ashwini_sahoo Posts: 47 Rating: (0)	Thank u Sir.....but the problem is now solved. [...snip...] New question was splitted to a new thread: BF led flashing in CPU & CU Blue Moderator
ashwini_sahoo Posts: 47 Rating: (0)	Last edited by: Blue Moderator at: 9/5/2013 1:20 PM
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9/5/2013 3:25 PM	Rate (0)
ChristophD Grandmaster-Expert Joined: 5/12/2006 Last visit: 12/10/2024 Posts: 22474 Rating: (3037)	Hello, and what was the problem/solution? Regards Christoph

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11/19/2021 10:27 AM	Rate (0)
Smart Barath Member Joined: 8/13/2021 Last visit: 10/23/2024 Posts: 1 Rating: (0)	ashwini_sahoo Thanks Christoph My set parameters are p2175 = 120 p2177 = 3.00 Encoder is not connected. please refer some solution. Regards Ashwini Sir, Motor is freely rotate but F7900 fault code shown in the CU240E-2. I have the lot of struggle of this problem. So please tell me how to solve this problem. As soon as possible. Thank you.

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