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Cause:
The amplitude (A^2 + B^2) of track A or B is not within the tolerance bandwidth.
SMC20:
The nominal signal level is at 500 mV (500 mV -25 % / +20 %). The response threshold is < 300 mV.
SMC10:
The nominal signal level is at 2900 mV (2.0 Vrms). The response threshold is < 1414 mV (1.0 Vrms).
Alarm value (r2124, decimal):
Low word:
Amplitude square root(A*A + B*B).
SMC20:
A signal level of 500 mV peak value corresponds to the numerical value 299A hex = 10650 dec.
SMC10:
A signal level of 2900 mV peak value corresponds to the numerical value 3333 hex = 13107 dec.
High word:
Angle 0 to 65535 corresponds to 0 to 360 degrees of the fine position. Zero degrees is at the negative zero crossover
of track B.
Remedy:
- check the speed range, frequency characteristic (amplitude characteristic) of the measuring equipment is not suf-
ficient for the speed range.
- check that the encoder cables are routed in compliance with EMC.
- check the plug connections.
- replace the encoder or encoder cable.
- check the encoder module (e.g. contacts).
- dirty code disk
- aged lighting system.
Reaction upon F:
NONE (DCBRAKE, ENCODER, OFF1, OFF2, OFF3, STOP1, STOP2)
Acknowledge
IMMEDIATELY
upon F:
Reaction upon A:
NONE
Acknowledge
NONE
upon A:
A33418 (F, N)
Encoder 3: Half the speed difference per sampling rate exceeded (p0492/2)
Reaction:
NONE
Acknowledge:
NONE
Cause:
The speed difference between two sampling cycles has exceeded half the value of parameter p0492.
The error is only evaluated for HTL/TTL encoders.
Alarm value (r2124, decimal):
Speed difference per current controller clock cycle in increments.
Remedy:
Check the tachometer feeder cable for interruptions.
Check the grounding of the tachometer shielding.
If required, increase the setting of p0492.
Reaction upon F:
NONE (DCBRAKE, OFF1, OFF2, OFF3, STOP1, STOP2)
Acknowledge
IMMEDIATELY
upon F:
Reaction upon N:
NONE
Acknowledge
NONE
upon N:
A33419 (F, N)
Encoder 3: Track A or B outside the tolerance range
Reaction:
NONE
Acknowledge:
NONE
Siemens AG 2004 All Rights Reserved
SINAMICS G List Manual, Edition 12.2004
Faults and Alarms
List of faults and alarms
3-631
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