Siemens Sinumerik 840C Diagnostics Manual page 90

1 Alarms
1.5.1 Alarm description
2003* Zero speed monitoring
S
Scan
When accelerating
S
When at zero speed
S
When clamped
S
When decelerating (delay)
S
Effect
Interlock of NC START
S
Interlock of Mode Group Ready
S
Setpoint 0
S
Servo enable is removed on expiry of the time in NC–MD "Cutoff delay servo enable"
S
Follow-up mode
S
Explanation
When positioning, the following error could not be eliminated faster than the time given in NC–MD "Cutoff delay
servo enable".
S
When clamped, the limit defined in the NC–MD "Zero speed monitoring" has been exceeded.
S
Mechanically clamped spindle has been pushed out of position.
S
Error on the activating device, on the tacho, on the motor, in the mechanical construction, in the CNC measu-
ring circuit hardware or on/in the encoder.
S
Wrong setpoint output assignment specified
S
When starting up: wrong sense of position control
S
Remedy
NC–MD "Zero speed monitoring" must be greater than NC–MD "Exact stop limit coarse".
S
NC–MD "Cutoff delay servo enable" must be great enough for the following error to be eliminated within this
time (applies only when NC–MD "Delay zero speed monitoring" = 0).
S
NC–MD "Delay zero speed monitoring" must be great enough for the following error of the various spindles to
be eliminated within the time entered.
S
Check actual values (encoder) and sense of position control.
2007* There is no measuring circuit
S
Scan
On POWER ON
S
Effect
Spindle is not processed
S
Servo disable of spindle concerned
S
Removal of Mode Group Ready
S
Interlocking of NC START
S
Interlocking of NC RDY relay
S
Explanation
MD 400* and/or MD 460* indicates an empty submodule slot on a measuring circuit module with submodules.
Example: MD 460* = 01090000, the first measuring circuit module is an HMS module with empty submodule
slot 2.
S
Measuring circuit module has been removed or is defective.
S
Remedy
Compare MD 400* and/or MD 460* with the hardware configuration and correct.
2008* Closed-loop hardware spindle
Scan
Cyclic
S
Effect
Interlocking of NC START
S
Setpoint relay drops out, setpoint 0
S
Removal of Mode Group Ready
S
Spindle servo enable is removed after the time in MD "Delay for servo enable" has elapsed.
Explanation
The measuring circuit difference signals
S
are not in phase
S
have a short circuit to groand
S
are absent
S
Remedy
Check wether the measuring circuit connector has been inserted
S
The measuring circuit short circuit connector can be slotted in to check whether the measuring circuit module
is functioning correctly.
S
Check the difference signals with the oscilloscope
S
Replace the encoder/cable
1–82
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Siemens AG 2001 All rights reserved 6FC5198–jAB40
SINUMERIK 840C / SIMODRIVE 611–D (DA)
04/96
Reset key
POWER ON
POWER ON