REXROTH DIAX04, Troubleshooting Manual

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Description of Diagnostic Letters F... and E... DIAX04 ELS-06VRS
DOK-DIAX04-ELS-06VRS**-WA01-EN-P
E251 Motor overtemp. prewarning
The motor is too hot. If the motor temperature, which is displayed in
parameter
S-0-0383, Motor temperature , has exceeded the value in S-0-
0201, Motor warning temperature , warning E251 is generated. If the
temperature increases above the value in S-0-0204, Motor shutdown
temperature , error F219 Motor overtemp. shutdown will be generated.
The values for parameters S-0-0201, Motor warning temperature and
S-0-0204, Motor shutdown temperature are set at 145 °C and 155 °C
respectively for MKD, MKE and MHD motors.
Cause:
1. The motor became overloaded. The effective torque required of the
motor was above the permissible continuous standstill torque for too
long.
2. Failure or contamination of motor cooling unit.
Remedy:
1. Check the layout of the motor. For systems which have been in use
for a long time, check to see if the drive controller conditions have
changed (in regards to pollution, friction, components which have
been moved, etc.).
2. Check operation of cooling system, clean air ways.
See also the functional description: "Temperature monitoring"
E253 Target position out of travel range
In operation modes with drive controlled interpolation, the drive checks
before the move whether the specified S-0-0258, Target position , is
within the possible travel range of the drive. This range is defined by the
parameters
S-0-0049, Positive position limit value and S-0-0050,
Negative position limit value . The position limit check is activated in the
parameter S-0-0055, Position polarities with bit 4.
Cause:
The target position lies beyond the position limits, and the position limit
check is activated.. The motion profile results in a target position greater
than the maximum allowed position.
Results:
•
This warning message, E253, appears.
•
The drive stops .
•
The drive does not accept the target position or the process block.
•
In S-0-0012, Class 2 diagnostic warning bit 13 is set.
Remedy:
•
For the Drive controlled interpolation mode, input the S-0-0258, Target
position only within the position limits.
•
Don't input moves which are greater than the maximum allowed
position minus the current position.
•
In positioning-sequence operating mode always set S-0-4006,
Command Targetposition smaller than the maximum allowed
position.