Siemens Sinumerik 840C Diagnostics Manual page 33
Digital ana module
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Also See for Sinumerik 840C:
- Installation instructions manual (1154 pages) ,
- Operator's manual (301 pages) ,
- Installation manual (189 pages)
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04/96
07/97
152*
SW limit switch minus
S
Scan
On each axis movement
S
Effect
Machining stops
S
Interlocking of "NC START"
S
Explanation
The software limit switch becomes active only after reference point approach has taken place.
S
The first or second software limit switch has been approached, according to the PLC interface signal "Second
software limit switch active".
S
Remedy
Travel away from the software limit switch in the opposite direction using JOG mode.
S
Check NC machine data for 1st software limit switch minus or 2nd software limit switch minus.
156*
Speed set val. alarm limit responded
Scan
Cyclic
S
Effect
Interlocking of NC START
S
Interlocking of Mode Group Ready
S
Setpoint 0
S
The control enable is removed after the time stored in NC machine data "Control enable cutout delay" has
elapsed
S
Follow-up operation
S
Explanation
A higher set speed value has been output within the control than set in NC machine data "Threshold for drive
errors".
S
The motor could not follow the setting of the speed set value.
S
On installation: wrong position control direction
S
Remedy
Check whether the value in NC machine data "Threshold for drive errors" is greater than the value in NC ma-
chine data "Max. speed setpoint (DAC)"
S
Check the drive
S
Check the position control direction
S
Check the speed set value cable
S
Check actual values (encoder)
160*
Drift too high
Scan
Where there is semi-automatic drift compensation and changes to MDs
S
Effect
Interlocking of NC START
S
"Position not yet reached" is displayed
S
No traversing movement is possible
S
Explanation
The drift to be compensated by the NC automatically has risen beyond approximately 500 mV.
S
Remedy
Carry out drift compensation in NC machine data "Drift compensation"
S
Check whether the drift on the drive unit has been set correctly
164*
Coupled-motion axis programmed
Scan
When executing a part program
S
Effect
Machining is interrupted
S
Interlocking of NC START
Explanation
The axis-specific alarm appears if a coupled axis is assigned several times in one part program block or if an axis
is "Leading axis" and coupled axis at the same time in one part program block.
S
Remedy
Check and correct program
168*
Servo enable traversing axis
Scan
With each axis movement
S
Effect
Interlocking of NC START
S
Interlocking of Mode Group Ready
S
Setpoint 0
S
The control enable is removed after the time stored in NC machine data "Control enable cutout delay" has
elapsed
S
Follow-up operation
Explanation
The axis-specific controller enable has been removed by the PLC during a traversing movement.
S
Remedy
Check the PLC program
Siemens AG 2001 All rights reserved 6FC5198–jAB40
SINUMERIK 840C / SIMODRIVE 611–D (DA)
1 Alarms
1.5.1 Alarm description
Reset key
Reset key
Reset key
Reset key
Reset key
1–25
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