9.3 Troubleshooting Malfunction Based on Operation and Conditions of the Servomotor
9-29
Dynamic Brake
Does Not Operate
Improper Pn001.0 setting
Check the setting for parameter
Pn001.0.
Correct the setting for parameter
Pn001.0.
DB resistor disconnected
Check if excessive moment of iner-
tia, motor overspeed, or DB fre-
quently activated occurred.
Replace the dynamic brake unit or
change the external dynamic brake
circuit. And reduce the load.
DB drive circuit fault −
A defective component is in the
dynamic brake circuit inside SER-
VOPACK. Replace the SERVO-
PACK.
Wiring of the dynamic brake unit is
incorrect.
Check the wiring. Correct the wiring.
(cont’d)
Problem Probable Cause Investigative Actions Corrective Actions
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