July 2010 4 – 31
8610 I2T value is
too high <axis>
Excessive load over the time of the drive. Reduce the load or the duration.
Check the motor table, power stage table
and configuration data.
Check whether the motor and power
module are designed for the load.
See “I2t monitoring” on page 3 – 676. See Service Manual Inverter Systems and
Motors.
8620 Load is too
high <axis>
Drive has maximum current and cannot
accelerate.
Excessive load (torque, power) on the drive.
Reduce the load on the drive.
Check the motor table, power stage table
and machine parameters.
Check whether the motor and power
module are designed for the load.
See “Sequence for Finding Errors in the
Control Loop” on page 6 – 62.
See Service Manual Inverter Systems and
Motors.
8640 I2T value of
motor is too high
<axis>
The load of the motor is too high over the
duration.
Reduce the load or the duration.
Check the motor table and machine
parameters.
Check whether the motor is designed for
the load.
See “I2t monitoring” on page 3 – 676. See Service Manual Inverter Systems and
Motors.
8650 I2T value of
motor is too high
<axis>
The load of the power module is too high
over the duration.
Reduce the load or the duration.
Check the motor table and machine
parameters.
Check whether the power module is
designed for the load.
See “I2t monitoring” on page 3 – 676. See Service Manual Inverter Systems and
Motors.
8800 Signal LT-
RDY inactive
<axis>
Inverter switch-off during closed-loop
control of a vertical axis (cause = vertical
axis).
Check the PLC program.
Check the wiring of the inverter.
See “Status of HEIDENHAIN inverters” on
page 3 – 682.
See Service Manual Inverter Systems and
Motors.
8810 Signal LT-
RDY inactive
<axis>
Inverter switch-off during closed-loop
control of a vertical axis (cause = vertical
axis).
Ch
eck the PLC program.
Check the wiring of the inverter.
See “Status of HEIDENHAIN inverters” on
page 3 – 682.
See Service Manual Inverter Systems and
Motors.
8820 Field angle
unknown <axis>
Field angle of the motor on the reference
point of the speed encoder has not yet been
ascertained.
Run a field orientation.
Check the motor table (column SYS).
See “Speed Encoders” on page 18 – 293.
Error message Possible cause of error Measures for error diagnosis and/or
corrective action
Additional information and descriptions in
the manual
Additional information and descriptions in
the manual
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