F276 Absolute Encoder Out Of Allowed Window; F277 Current Measurement Trim Wrong; F281 Mains Fault - Bosch Rexroth OptiFeed-FS EcoDrive 03 FLP04VRS Functional Description

12-12
Diagnostic Message Descriptions

F276 Absolute encoder out of allowed window

F277 Current measurement trim wrong

F281 Mains fault

When turning off the drive controller with an absolute encoder motor
(multiturn), the actual feedback position will be stored. When powered up,
the absolute position determined by the encoder evaluation is compared
with this stored position. If the deviation is greater than the value set in
parameter A118, Absolute Encoder Monitoring Window, error F276 is
generated and the control is notified.
Cause:
1. Controller is turned on for the first time (stored position is invalid)
2. While the controller was turned off, the axis was moved further
than allowed by Parameter A118, Absolute encoder monitoring
window.
3. Incorrect position initialization
Remedy:
For 1. Clear error (establish absolute reference point).
For 2. The axis was moved with the motor turned off and is outside of its
permissible position. Check to see if the displayed position is
correct in relation to the machine zero point. Then clear the error.
For 3. Unintentional movement of the axis may cause accidents.
Check absolute reference point. If the absolute reference point is
incorrect, the encoder is defective. The motor should be replaced
and sent to REXROTH Customer Service.
This error can occur only when the drive controller is tested at the Rexroth
factory.
Measurement of the current within the drive controller is precisely
calibrated in the Rexroth test bay using a compensation current. During
this calibration, the correction values are found to be outside the intended
tolerances.
Cause:
1. Defective hardware in the drive controller.
2. The correct compensation current for this measurement is not flowing.
Remedy:
1. Repair the control card.
2. Check the compensation current.
Cause:
The power supply voltage was not present during operation for at least 3
power periods. As a result, the drive controller was brought to a standstill
according to the set error response (Parameter A119).
Remedy:
Check the power connections to ensure that they are as specified in the
project planning specifications.
ECODRIVE03-FL*-04VRS
DOK-ECODR3-FL*-04VRS**-FK01-EN-P