HEIDENHAIN TNC 426 PB - Page 1105

10 – 12 HEIDENHAIN Technical Manual TNC 426, TNC 430
8B40 Power supply unit
<axis> not ready
n Inverter is not ready for
operation.
n No pulse release for the
power module.
n U
z
too high.
n Power-fail signal is
active.
n If M control: NE2 input is
active.
n If P control: drive release
at X50 is inactive.
n Motor control board
defective.
n PWM cable defective.
n Noise pulses.
n Inform your service agency.
• Check the control and
cabling of the pulse release.
n Check U
z
.
n Check the emergency stop
circuit.
n If the power supply is not
regenerative: Is the braking
resistor connected?
n If the power supply is
regenerative: Is the energy
recovery activated?
n Check the grounding and
shielding of the cable.
n Exchange the power module.
n For P controls: Exchange the
interface card.
n Exchange the motor drive
control board.
280 476-01
8B50 Axis module
<axis> not ready
n No pulse release for the
power module.
n U
z
too high.
n 5 V power supply too
weak.
n Inverter is not ready for
operation.
n Motor control board
defective.
n PWM cable defective.
n Noise pulses.
n Inform your service agency.
• Check the control and
cabling of the pulse release.
• Check U
z
.
• If the power supply is not
regenerative: Is the braking
resistor connected?
• If the power supply is
regenerative: Is energy
recovery activated?
• Check the grounding and
shielding of the cable.
• Exchange the power
module.
• For P controls: Exchange the
interface card.
• Exchange the motor drive
control board.
280 476-01
8B60 Axis module
<axis> IGBT error
n Undervoltage,
temperature, or short-
circuit monitor of an
IGBT in the inverter has
responded.
n Let the inverter cool down.
n Inform your service agency.
n Examine the motor for a short
circuit in the windings.
n Exchange the power module.
280 476-01
8BA0 Incorrect line
count <axis>
n Incorrect entry in motor
table.
n Faulty reference signal.
n Noise pulses.
n Encoder cable is
defective.
n Inform your service agency.
• Check the entry in the motor
table.
• Check the motor encoder
cable.
• Exchange the motor
encoder cable.
• Exchange the motor.
280 476-01
Error message Cause Corrective action As of
NC SW