Siemens SINUMERIK 808D ADVANCED Commissioning Manual page 494

Fault
F30050: 24 V supply over-
voltage
Reaction: OFF2
Acknowledgement: POWER
ON
F30071: No new actual
values received from the
power unit module
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F30074: Communication
error between the Control
Unit and Power Module
Reaction: NONE
Acknowledgement:
IMMEDIATELY
F31100: Zero mark distance
error
Reaction: ENCODER
Acknowledgement: PULSE
INHIBIT
494
Cause
The voltage monitor signals an overvolt-
age fault on the module.
The number of actual value telegrams
from the power unit module that have
failed has exceeded the permissible num-
ber.
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been withdrawn or is incorrectly inserted.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ply was withdrawn from the Power Unit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The Control Unit was withdrawn from the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.
Remedy
Check the 24 V power supply.
•
Replace the module if necessary.
•
Replace the module if necessary.
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.
•
Commissioning Manual
01/2017