Siemens SINUMERIK 840C Diagnostics Guide

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Siemens AG 2001 All rights reserved 6FC5198–jAB40
1–25
SINUMERIK 840C / SIMODRIVE 611–D (DA)
152* SW limit switch minus Reset key
S On each axis movement
S Machining stops
S Interlocking of “NC START”
S 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 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 Reset key
Cyclic
S 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 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 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 Reset key
Where there is semi-automatic drift compensation and changes to MDs
S Interlocking of NC START
S “Position not yet reached” is displayed
S No traversing movement is possible
S The drift to be compensated by the NC automatically has risen beyond approximately 500 mV.
S 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 Reset key
When executing a part program
S Machining is interrupted
S Interlocking of NC START
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 Check and correct program
168* Servo enable traversing axis Reset key
With each axis movement
S 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
The axis-specific controller enable has been removed by the PLC during a traversing movement.
S Check the PLC program
Scan
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1 Alarms
1.5.1 Alarm description
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Siemens SINUMERIK 840C Specifications

General

Brand	Siemens
Model	SINUMERIK 840C
Category	Control Unit
Language	English