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ECODRIVE03-FL*-04VRS
F873 Power supply driver stages fault
F878 Velocity loop error
DOK-ECODR3-FL*-04VRS**-FK01-EN-P
Remedy:
For 1. Check cables for control voltages and/or connections and replace if
necessary.
For 2. Check the 24-V supply voltage at the power supply unit.
For 3. Check the power supply unit.
For 4. Check the emergency stop circuit for a short-circuit.
Note:
The error can be reset only in Parameter Mode. As a result of
this error, the encoder emulation is switched off.
The power supply for the driver stages is monitored. If the voltage is too
low, the drive is turned off.
Cause:
The voltage supplied to the driver stages is too low.
Remedy:
Replace drive controller.
The velocity loop monitoring function is activated when the following
conditions occur simultaneously:
The current command value is at the peak current limit.
The difference between the actual velocity and the target velocity is more
than 10% of the maximum motor velocity.
Actual velocity > 1.25% of the maximum velocity
Target and actual acceleration values have different operational (+/-)
signs.
Cause:
1.
Motor cable is connected incorrectly.
2.
Power circuit of the drive controller defective.
3.
Defective encoder.
4.
Velocity loop parameters set incorrectly.
5.
Incorrect commutation offset.
Remedy:
For 1. Check motor cable connection.
For 2. Replace the drive controller.
For 3. Replace the motor.
For 4. Check the velocity loop to see whether it is within operational
parameters.
For 5. Replace the motor.
Diagnostic Message Descriptions
12-21
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