DC Link Overvoltage

What does 413 mean?

A DC Link Over Voltage Alarm has been issued, indicating that the DC voltage in the main circuit power is excessively high. This can be caused by overvoltage from the supply, excessive regenerative energy, or issues with the regenerative discharge unit.

• Supply voltage for dynamic power exceeds its rated value.
• Regenerative energy per cycle exceeds the allowable regenerative energy of the servo amplifier module (for SVM1-4i/SVM1-20i without separate unit).
• Separate regenerative discharge unit is not properly connected.
• Resistance of the separate regenerative discharge unit is abnormal (not within ±20% of predetermined resistance).
• CZ6 connector not short-circuited with a dummy connector for SVM1-40i/SVM1-80i when the separate regenerative discharge unit is not used.

1. 1

   For SVM1-4i/SVM1-20i (without separate unit): Check specifications to confirm regenerative energy per cycle does not exceed the servo amplifier's allowable limit.

2. 2

   For SVM1-40i/SVM1-80i (without separate unit): Check if the CZ6 connector is short-circuited with a dummy connector.

3. 3

   Measure the supply voltage for dynamic power. If too high, reduce it to an appropriate level.

4. 4

   Verify the physical connection of the regenerative discharge unit.

5. 5

   Disconnect the separate regenerative discharge unit; measure its resistance. If it is not within ±20% of the predetermined resistance, replace the unit.

6. 6

   If all other steps fail, replace the servo amplifier unit.