Siemens Sinumerik 840C Diagnostics Manual page 91

04/96
07/97
2009* Contamination measuring system spindle
S
Scan
Cyclic
S
Effect
Interlocking of NC START
S
Interlocking of Mode Group Ready
S
Explanation
Where measuring systems have a contamination signal (e.g. EXE) an error is sent to the NC from the measu-
ring system.
S
Remedy
Check the measuring system against the manufacturer's specifications.
2010* Pulse code monitoring
S
Scan
Cyclic
S
Effect
Interlocking of Mode Group Ready
S
Interlocking of NC START
S
Alarm causes machining stop
S
Explanation
Transmission error or interference from encoder
S
Remedy
Check encoder, cable, connecter
2011* Zero marks monitoring has responded
S
Scan
Cyclic, depending on the tolerance band set for the difference pulses
S
Effect
Interlocking of NC START
S
Machining stops
Explanation
Pulses have been lost per encoder revolution, above the permitted tolerance band, due to transmission errors,
interference or too high speed. The reference counter checks this zero mark.
S
Remedy
Check the encoder pulses
S
Check transmission path
2014* Setpoint or actual speed alarm limit exceeded
2014* Speed setpoint value alarm limit responded
Scan
Cyclic
S
Effect
Interlocking of NC START
S
Interlocking of Mode Group Ready
S
Setpoint 0
S
Servo enable is removed after the time in NC MD "Cutout delay servo enable" has elapsed
S
Follow-up mode
S
Explanation
The motor could not follow the entered speed setpoint.
S
During start-up: incorrect position control direction, incorrect spindle multgain
S
The speed actual value exceeds the maximum spindle speed + tolerance
If the service number 309 is indicated here, the reason for the alarm is a format overflow, which can be avoided by
reduction of the resolution. Another reason can also be the resolution of the C axis assigned.
S
Remedy
Check the drive
S
Check position control direction
S
Match spindle multgain (MD 468*)
S
Check speed setpoint cable
S
Check actual values (pulse encoder)
S
Increase spindle speed tolerance (MD 445*)
S
Increase acceleration time constant (MD 419* – 426*)
S
Note
Alarm "Setpoint or actual speed alarm limit exceeded": up to SW 3
S
Alarm "Speed setpoint alarm limit actuated": as from SW 4
2015* Drift too high
Scan
With input of NC MD 401* or with semi-automatic drift compensation (axis only)
Effect
Interlocking of NC START
Explanation
The entered drift is greater than approx. 500 mV. In the case of semi-automatic drift compensation, the drift to be
compensated for by the NC has risen to above approx. 500 mV.
Remedy
Check whether the drift has been compensated for correctly at the driving unit.

Siemens AG 2001 All rights reserved 6FC5198–jAB40
SINUMERIK 840C / SIMODRIVE 611–D (DA)
1 Alarms
1.5.1 Alarm description
POWER ON
Reset key
Reset key
Reset key
Reset key
Reset key
1–83