4 – 38 HEIDENHAIN Service Manual iTNC 530
AC00 CC
amplitude too high
%.2s
The amplitude of the encoder signal is too
high or the signal for contamination is active.
Noise on motor encoder signal
Short-circuit in motor encoder cable
Motor encoder signal amplitude too high
Check connection of motor encoder (ground
connection).
Check the motor encoder.
Noise on signal
Scanning head too close to scale
For very old encoders: Incandescent lamp
too bright (spiral-wound filament short-
circuited)
Adjust the scanning head.
See “Encoder Interface” on page 18 – 277.
8B00 <Achse>
motor encoder
defective
No encoder signal available
Interruption in motor encoder cable
Signal amplitude of motor encoder is
missing or too small.
Check connection of motor encoder.
Check the motor encoder.
Check the amplitude of the encoder signal.
See “Speed Encoders” on page 18 – 293.
AC20 CC
frequency too
high %.2s
The maximum input frequency was
exceeded at an encoder input.
Noise on motor encoder signal
Check connection of motor encoder (ground
connection).
Check the motor encoder.
Check encoder signal input frequency.
See “Speed Encoders” on page 18 – 293.
AC40 CC ampl.
too low %.2s
(position)
The position encoder signal amplitude is too
small or the contamination signal is active.
Interruption in encoder cable.
Encoder signal amplitude missing.
Check connection of encoder.
Check the encoder.
Check encoder signal amplitude.
Inform your service agency.
See “Encoder Interface” on page 18 – 277.
AC50 CC freq. too
high %.2s
(position)
The maximum input frequency was
exceeded at a position encoder input.
Noise on the encoder signal
Check connection of encoder (ground
connection).
Check the encoder.
Check the input frequency of the encoder
signal.
See “Further Examination of Position and
Speed Encoders” on page 18 – 308.
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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