ECODRIVE03 SMT-02VRS Description of diagnostic letters F... and E... 3-23
DOK-ECODR3-SMT-02VRS**-WA01-EN-P
Remedy:
Ref. 1. Check and, if necessary, replace the cable and connections of the
control voltages.
Ref. 2. Check the 24-V power at the power supply unit.
Ref. 3. Check the power supply unit.
Ref. 4. Check the emergency stop circuit for a short-circuit.
Note: This error can only be cleared in parameter mode (phase 2).
As a result of this error, the encoder emulation is switched off.
F873 Power supply driver stages fault
The voltage supply of the driver stage is monitored, and if the voltage is
too low, the drive is turned off.
Cause:
The voltage supply of the driver stage is too low.
Remedy:
Exchange drive controller.
F878 Velocity loop error
The velocity loop monitor will appear when the following conditions occur
simultaneously:
•
The current command value is at the peak current limit.
•
Command accel and actual velocity have different qualifying signs
•
Actual velocity > 20 rpm or 20 mm/min
•
Command and actual acceleration have different qualifying (+/-)signs.
Cause:
4. Motor cable is connected incorrectly.
5. Defective controller section of the drive
6. Defective feedback
7. Velocity loop paramatrized incorrectly
8. Incorrect commutation offset
Remedy:
For 1. Check the motor cable connection.
For 2. Exchange the drive controller.
For 3. Exchange the motor.
For 4. Check the velocity controller to see whether it is within
operational parameters.
For 5. Exchange the motor.
See also the functional description: "Determining the Velocity Controller
Setting".
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