HEIDENHAIN ITNC 530 - Page 36

4 – 36 HEIDENHAIN Service Manual iTNC 530
8B60 Overcurrent
cutoff %.2s
 Undervoltage, temperature, or short-circuit
monitor of an IGBT in the inverter has
responded.
 Let the inverter cool down.
 Check the motor connection for a short
circuit.
 Examine the motor for short circuit in the
windings.
 Exchange the power module.
 See “Sequence for Finding Errors in the
Control Loop” on page 6 – 62.
 See Service Manual Inverter Systems and
Motors.
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 encoder cable.
 Exchange the motor.
 See “Speed Encoders” on page 18 – 293.
 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 encoder input PCB.
 See “Speed Encoders” on page 18 – 293.
 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 boar
d defective
 Correct
motor and power module selected?
 Check the current control 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 – 62.
 See Service Manual Inverter Systems and
Motors.
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