Siemens Sinumerik 840C Diagnostics Manual page 200

1 Alarms
1.5.1 Alarm description
300506 Sign of life: NC failed
Scan
Cyclic after servo enable
Effect
for MSD:
S
Pulse suppression, motor coasts down
S
SIMODRIVE_READY and DRIVE_READY are cancelled.
S
Power On – error
for FDD:
S
Controllers are disabled, motor is braked
S
SIMODRIVE_READY and DRIVE_READY are cancelled.
S
As from drive SW 2, response can be configured via MD 1612.6
Explanation
With servos enabled, the NC must update the sign of life in every position control cycle. If an error occurs, the sign
of life has not been updated.
Cause:
a) NC does not update the sign of life as response to an alarm (e.g. 611D alarm)
b) Failure of communication via drive bus
c) Hardware fault of drive module
d) NC failure
e) In case of multiple assignment, axial difference in setpoints for position control cycle.
Remedy
Re a)
Check to see whether the sign of life failure is a secondary error. It is a secondary error if, for example:
Axis x is faulty / outputs an alarm in an n–axes structure. If this error situation is present, the above error message
is given for all n axes, although there is a fault/alarm present only on axis x.
å Correct fault of axis x
å Sign of life of other axes is irrelevant
Re b)
Check connector, take radio interference suppression measures (check shielding and ground)
Re c) Exchange servo module
Re d) See NC error diagnosis, replace NC hardware, if necessary.
Note
Applies as from SW 6
300507 Synchronization error rotor position
Scan
Control power up or cancellation of the Parking Axis function
Effect
for FDD:
S
Controllers are disabled, motor is braked
S
SIMODRIVE_READY and DRIVE_READY are cancelled
S
As from drive SW 2, response can be configured via MD 1612.7
Explanation
Difference angle between the actual rotor position and the recalculated rotor position is too great. Faults might
have occurred on the encoder or zero marker signals.
Remedy
Reference with BERO deselect. Check encoder cable, encoder cable connection or grounding, because EMC
problems might have occurred.
Replace motor/611D if necessary.
Note
Applies as from SW 4
As from SW 5, alarm cannot be configured
1–192
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Siemens AG 2001 All rights reserved 6FC5198–jAB40
SINUMERIK 840C / SIMODRIVE 611–D (DA)
04/96
01/99
POWER ON
POWER ON