Encoder 1: Inversion Error Signals A And B And R; Encoder 1: Speed Difference Outside The Tolerance Range - Siemens Sinamics S120 Diagnostic Manual

231117 <location>Encoder 1: Inversion error signals A and B and R
Message value: Fault cause: %1 bin
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: ENCODER (IASC/DCBRAKE, NONE)
Acknowledge: IMMEDIATELY
Cause: For a square-wave encoder (bipolar, double ended) the A* and B* and R* signals are not inverted with respect to sig-
nals A and B and R.
Fault value (r0949, interpret binary):
Bits 0-15: Only for internal Siemens troubleshooting.
Bit 16: Error track A.
Bit 17: Error track B.
Bit 18: Error track R.
Note:
For SMC30 (order no.. 6SL3055-0AA00-5CA0 and 6SL3055-0AA00-5CA1 only), CUA32, and CU310, the following
applies:
A square-wave encoder without track R is used and track monitoring (p0405.2 = 1) is activated.
See also: p0491 (Motor encoder fault response ENCODER)
Remedy: Check the encoder/cable: Does the encoder provide signals and the associated inverted signals?
Note:
For SMC30 (order no. 6SL3055-0AA00-5CA0 and 6SL3055-0AA00-5CA1 only), the following applies:
- check the setting of p0405 (p0405.2 = 1 is only possible if the encoder is connected at X520).
For a square-wave encoder without track R, the following jumpers must be set for the connection at X520 (SMC30) or
X23 (CUA32, CU310):
- pin 10 (reference signal R) <--> pin 7 (encoder power supply, ground)
- pin 11 (reference signal R inverted) <--> pin 4 (encoder power supply)
231118 <location>Encoder 1: Speed difference outside the tolerance range
Message value: %1
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: ENCODER (IASC/DCBRAKE, NONE)
Acknowledge: PULSE INHIBIT
Cause: For an HTL/TTL encoder, the speed difference has exceeded the value in p0492 over several sampling cycles.
The change to the averaged speed actual value - if applicable - is monitored in the current controller sampling time.
Encoder 1 is used as motor encoder and can be effective has fault response to change over to encoderless operation.
Fault value (r0949, interpret decimal):
Only for internal Siemens troubleshooting.
See also: p0491 (Motor encoder fault response ENCODER), p0492 (Square-wave encoder, maximum speed differ-
ence per sampling cycle)
Remedy: - check the tachometer feeder cable for interruptions.
- check the grounding of the tachometer shielding.
- if required, increase the maximum speed difference per sampling cycle (p0492).
Alarms
Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
SINAMICS alarms
741