February 2012 4 – 33
8BA0 Incorrect
reference signal or
line count %.2s
Invalid entry for the line count STR in the
motor table
Faulty reference signal
Noise pulses
Motor encoder cable defective (break or
short circuit)
Check the entry in the motor table.
Check the signals from the speed or rotational
speed encoder (PWM8).
Check encoder cable for interruption or short
circuit under mechanical load (bending,
stretching, etc.)
Check the shielding and shield connection in
the encoder cable.
Exchange the encoder cable.
Exchange the motor.
See ”Speed encoders” on page 19 – 300.
See Service Manual Inverter Systems and
Motors.
8BB0 Motor
temp. too low
%.2s
Measured motor temperature too low
Temperature sensor wired incorrectly (short
circuit)
Temperature sensor defective
Incorrect temperature sensor (KTY84 required)
Hardware error on encoder input PCB
Check the wiring.
Check temperature sensor.
Deselect monitoring of excessively low
temperature with MP2220 bit 5.
Exchange the encoder input PCB.
See ”Speed encoders” on page 19 – 300.
See Service Manual Inverter Systems and
Motors.
8BC0 Motor
current %.2s too
high
Incorrect motor or power module selected
Incorrect current controller parameters
Incorrect parameters in the motor table
Power module defective
Motor cable defective (short circuit).
Motor defective (short circuit, ground fault)
Motor control board defective
Correct motor and power module selected?
Check the current controller adjustment.
Check the motor and motor cable for a short
circuit.
Exchange the power module or the drive
control board.
See ”Sequence for finding errors in the control
loop” on page 6 – 58.
See Service Manual Inverter Systems and
Motors.
8BD0 Excessive
servo lag in <axis>
The following error of a moving axis is greater
than the value given in machine parameter
MP17
20.x (lag mode) or MP1420.x
(feedforward mode).
The acceleration entered is too large.
The motor is not moving even though drive-on
was given.
Reduce the feed rate and increase the spindle
speed.
Remove potential sources of vibration.
The motor current must not be limited during
acceleration.
Overloaded driver
Insufficient lubrication
Mechanical stiffness
Machine vibration
Hardware error in the control loop
For analog axes: Servo defective
Check the lubrication.
Remove mechanical stiffness.
Analog axes: Check the servo.
Check the acceleration.
See ”Sequence for finding errors in the control
loop” on page 6 – 58.
Carry out offset adjustment.
(See ”Adjusting the electrical offset (drift
adjustment)” on page 21 – 355.)
Carry out speed adjustment.
(See ”Speed adjustment at the servo amplifier
(tachometer adjustment)” on page 21 – 358.)
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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