10/31/2021 2:32 PM | |
Joined: 9/27/2006 Last visit: 10/13/2024 Posts: 12287 Rating: (2685) |
Hello Brave boy; A0503 (for a MM4 drive) sgnifies Alarm_Undervoltage. F0070 refers to a communication fault. For possible causes of the comm fault (F0070), look at this document: https://support.industry.siemens.com/cs/ww/en/view/22329309 A0503 is described in this fashion in the MM4 Parameter List manual: - A0503 Undervoltage limit value
- line supply has failed. - line voltage and therefore also the DC link voltage (r0026) below the defined limit value (refer to parameter r0026).
- check the line voltage. For a discussion on the simultaneous appearance of both A0503 and F0070 , look here; maybe some suggestions can be helpful: Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 10/31/2021 14:33:48 |
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