Yaskawa MP940 - Manual (Page 380)

10.2 Troubleshooting
10-13
10
„ 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
„ A.74
A.74: Overload of Surge Current Limit Resistor
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
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 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.
Alarm Outputs
Alarm Code Outputs
ALM Output
ALO1 ALO2 ALO3
ON ON ON OFF
A B
When servo OFF signal
turned ON
At power ON