Siemens SINUMERIK 808D ADVANCED Series Commissioning Manual page 471

Fault
F30074: Communication
error between the Control
Unit and Power Module
Reaction: NONE
Acknowledgement:
IMMEDIATELY
F31100: Zero mark distance
error
Reaction: ENCODER
Acknowledgement: PULSE
INHIBIT
F31110: Serial communica-
tions error
Reaction: ENCODER
Acknowledgement: PULSE
INHIBIT
F31111: Encoder 1: Abso-
lute encoder internal error
Reaction: ENCODER
Acknowledgement: PULSE
INHIBIT
Commissioning Manual
6FC5397-4EP10-0BA8, 07/2018
Cause
Communications between the Control Unit
(CU) and Power Unit (PU) via the interface
no longer possible. The CU may have
been withdrawn or is incorrectly inserted.
Fault value (r0949, interpret hexadecimal):
0 hex:
a Control Unit with external 24 V sup-
•
ply was withdrawn from the Power Unit
during operation.
with the Power Unit switched off, the
•
external 24 V supply for the Control
unit was interrupted for some time.
1 hex:
The Control Unit was withdrawn from the
Power Unit during operation, although the
encoderless safe motion monitoring func-
tions are enabled. This is not supported.
After reinserting the Control Unit in opera-
tion, communications to the Power Unit no
longer possible.
20A hex:
The Control Unit was inserted on a Power
Unit, which has another code number.
20B hex:
The Control Unit was inserted on a Power
Unit, which although it has the same code
number, has a different serial number.
601 hex:
The Control Unit was inserted on a Power
Unit, whose power/performance class
(chassis unit) is not supported.
The measured zero mark distance does
not correspond to the parameterized zero
mark distance.
For distance-coded encoders, the zero
mark distance is determined from zero
marks detected pairs. This means that if a
zero mark is missing, depending on the
pair generation, this cannot result in a fault
and also has no effect in the system.
Serial communication protocol transfer
error between the encoder and evaluation
module.
The absolute encoder fault word supplies
fault bits that have been set.
Remedy
Reinsert the Control Unit (CU) or the Control
Unit adapter (CUAxx) onto the original Power
Unit (PU) and continue operation. If required,
carry out a POWER ON for the CU and/or the
CUA.
Check that the encoder cables are routed
•
in compliance with EMC.
Check the plug connections.
•
Check the encoder type (encoder with
•
equidistant zero marks).
Replace the encoder or encoder cable.
•
Check the encoder cable and shielding
•
connection.
Replace the motor.
•
Check the encoder cable connection, and
•
make sure the encoder cables are routed in
compliance with EMC.
Check the motor temperature.
•
Replace the encoder/motor.
•
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