Siemens SINUMERIK 840C Diagnostics Guide

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Siemens AG 2001 All rights reserved 6FC5198–jAB40
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SINUMERIK 840C / SIMODRIVE 611–D (DA)
132* Closed-loop system hardware axis POWER ON
S 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
The measuring circuit difference signals.
S Are not in phase
S Have a fault to earth
S Are completely missing
S Check whether the measuring circuit connector has been plugged in
S By plugging in the measuring circuit short-circuit connector it is possible to check whether the measuring cir-
cuit group is in working order
S Check the difference signals using an oscilloscope
S Replace the encoders
S Check NC MD 200*, 384*
The alarm can only be cancelled by POWER ON.
136* Contamination measuring system axis POWER ON
S Cyclic
S Interlocking of NC START
S Interlocking of Mode Group Ready
S Machining stops
S On measuring systems with a contamination signal (e.g. EXE) an error is sent to the NC from the measuring
system.
Check the measuring system in accordance with the manufacturer’s instructions.
140* Pulse code monitoring Reset key
S Cyclic
S Interlocking of Mode Group Ready
S Interlocking of NC START
S Alarm leads to machining stop
S Transmission errors or noise from encoder
S Check encoder, cable, connector
144* Zero mark monitoring responded Reset key
S Cyclic
S Interlocking of NC START
Transmission errors, noise or excessive speed have caused pulses to be lost relating to an encoder revolution
S Check encoder pulses
S Check transmission path
S Switch off monitoring system briefly with MD 1820* bit 1=0
148* SW limit switch plus Reset key
S With each axis movement
S Machining stops
S Interlocking of NC START
S The software limit switch only becomes active after approach to reference point.
S Depending on the PLC interface signal “Second software limit switch active”, the first or the second limit switch
has been approached.
S Traverse away from the limit switch in the opposite direction in JOG mode.
S Check the values in machine data for software limit switches.
Scan
Effect
Explanation
Remedy
Scan
Effect
Explanation
Remedy
Scan
Effect
Explanation
Remedy
Scan
Effect
Explanation
Remedy
Scan
Effect
Explanation
Remedy
1 Alarms
1.5.1 Alarm description

Siemens SINUMERIK 840C Specifications

General

Brand	Siemens
Model	SINUMERIK 840C
Category	Control Unit
Language	English