ECODRIVE DKC01.1/DKC11.1 Drive Controllers
DOK-ECODRV-ASE-02VRS**-WAR1-EN-P • 07.96 Description of Diagnostic Letters F... and E... 2-9
F873 Power Supply Driver Stage Fault
Description:
The voltage supply of the driver stage is monitored and if the voltage is
too low then the drive is turned off.
Cause:
Voltage supply of the driver stage is too low
Remedy:
Exchange drive controller
F878 Velocity Loop Error
Description:
The velocity loop monitor will appear when the following conditions occur
simultaneously:
• The current command value is at the peak current limit
• The difference between the actual velocity and the command velocity
is larger than 10% of the maximum motor velocity.
• The velocity control deviation does not become smaller over a time
frame of 20ms.
Cause:
1. Motor cable is connected incorrectly.
2. Defective controller section of the drive.
3. Defective feedback.
4. Velocity loop paramaterized incorrectly.
Remedy:
For 1. Check motor cable connection.
For 2. Exchange drive controller.
For 3. Exchange motor
For 4. Check velocity controller to see if it is within operational
parameters.
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