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Sigma II User's Manual
n
A.73
A.73: Dynamic Brake Overload
Display and Outputs
Status and Remedy for Alarm
When the Servo OFF (/S-ON)
signal is turned ON.
Cause of the Problem
The product of the square of rotational motor
speed, the combined inertia of the motor, and
A
load (rotation energy) exceeds the capacity of the
dynamic brake resistor built into servo amplifier.
B
Defective circuit board (1PWB).
Alarm Outputs
Alarm Code Output
ALO1
ALO2
ON
ON
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
ON
OFF
At power ON.
A
• Reduce the rotational speed.
• Decrease the load inertia.
• Minimize use of the dynamic brake.
Replace servo amplifier.
9-16
B
Solution
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