E256 Torque Limit = 0; E257 Continuous Current Limit Active; E259 Command Velocity Limit Active - Bosch Rexroth OptiFeed-FS EcoDrive 03 FLP04VRS Functional Description

ECODRIVE03-FL*-04VRS

E256 Torque limit = 0

E257 Continuous current limit active

E259 Command velocity limit active

DOK-ECODR3-FL*-04VRS**-FK01-EN-P
Cause:
1. For protection against mechanical overloading, the MOM
command can be used to limit the maximum torque. If the current
value is equal to 0, the motor does not develop torque and does
not comply with the stipulated command values.
2. Torque reduction is set via an analog channel, and the applied
voltage amounts to 10 V.
Remedy:
For 1. Set the torque limit to a value greater than 0.
For 2. Apply an analog voltage of less than 10 V.
The drive controller supplies peak current for 400 ms. Afterward, the
continuous current limit becomes active and dynamically limits the peak
current until it reaches the value of the continuous current.
Cause:
More continuous torque was required than was available.
Remedy:
1. Check the drive rating.
2. For systems which have been in use for a long time, check to see
whether the drive conditions have changed with regard to
• contamination
• friction
• moved mass
The velocity command value is limited to the value present in Parameter
A106, Maximum velocity.
Cause:
Parameter A106, Maximum velocity set too low.
Remedy:
Check parameter and program.
Diagnostic Message Descriptions
12-25