Siemens 6SE7087-8KN50 Instructions De Service page 315

10.2006
Number / Fault Cause
F051 - Signal amplitude of resolver or encoder is
below the tolerance threshold
Encoder fault - Power supply faults in the case of encoders
and multiturn encoders
- In the case of multiturn encoders
(SSI/Endat), connection fault of the serial
protocol
Siemens AG 6SE7087-7KN50
SIMOVERT MASTERDRIVES Operating Instructions
Counter-measure
Fault value r949:
10th and 1st position:
9 = Resolver signal missing (sin/cos track)
20 = Position error: Alarm A18 was generated
during the change to the "operation" state.
(For remedial action see 29)
21 = A/B track undervoltage:
Root(A^2+B^2)<0.01V (For remedial action
see 29)
22 = A/B track overvoltage:
Root(A^2+B^2)>1.45V (For remedial action
see 29)
25 = Encoder initial position not recognized
(C/D track missing)
- Check encoder cable (faulty / interrupted)?
- Correct encoder type parameterized?
- Is the correct cable used for encoder or
multiturn encoder? Encoders and multiturn
encoders need different cables!
- Encoder faulty?
26 = Encoder zero pulse outside the permitted
range
27 = No encoder zero pulse has occurred
28 = Encoder/multiturn
Voltage supply Encoder fault
- Short-circuit in encoder connection?
- Encoder faulty?
- Encoder incorrectly connected up?
!!!Power off/on or in drive settings and back to
new initialization of the starting position!!!
29 = A/B track undervoltage: In the zero
passage of one track the amount of the other
track was less than 0.025 V
- Check encoder cable (faulty/torn off)?
- Is shield of encoder cable connected ?
- Encoder faulty?
- Replace SBR/SBM
- Replace unit or basic board
- Is the correct cable being used in each case
for the encoder/multiturn encoder?`Encoders
and multiturn encoders require different
encoder cables!
!!!Power off/on or in drive settings and back to
new initialization of the starting position!!!
Multiturn (SSI/EnDat):
30: Protocol fault CRC/Parity Check (EnDat)
31: Timeout Protocol (EnDat)
32: No-load level error, data line (SSI/EnDat)
33: Initialization of timeout
- Check parameterization (P149)
- Check encoder cable (faulty / torn off?
- Encoder cable shield connected ?
- Encoder faulty?
- Replace SBR/SBM
- Replace unit or basic board
Faults and Alarms
12-5