Siemens Micromaster 430 or MM430 Drive
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Jun 11, 2022 9:17 am
How can resolve problem A0502 alarm in siemens micromaster 430 or MM430 drive ?
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Jun 11, 2022 9:18 am
Cause : Overvoltage limit. Overvoltage limit is reached. This warning can occur during ramp down, if the dc-link controller is disabled (P1240 = 0).
Diagnose & Remedy
Check the following:
1. Supply voltage (P0210) must lie within limits indicated on rating plate
2. DC-link voltage controller must be enabled (P1240) and parameterized properly
3. Ramp-down time (P1121) must match inertia of load
4. Required braking power must lie within specified limits
