Yaskawa Large Capacity Sigma II Series - Manual (Page 354)

8.2 Troubleshooting
8-15
8
„ A.73
A.73: Dynamic Brake Overload
Display and Outputs
Note: OFF:Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
ON ON ON OFF
Cause Remedy
A The product of the square of rotational
motor speed and the combined moment of
inertia of the motor and load (rotation
energy) exceeds the capacity of the dynamic
brake resistor built into SERVOPACK. • Lower the rotational speed.
• Lower the load moment of inertia.
• Minimize the use of the dynamic brake.
B Circuit board (1PWB) defective. Replace SERVOPACK.
When servo OFF signal
turned ON
A At power ON B