Siemens Sinumerik 840D sl Diagnostic Manual page 919

03/2009
The response threshold is > 750 mV.
A signal level of 500 mV peak value corresponds to the numerical value of 5333 hex = 21299 dec.
Note:
The analog value of the amplitude error is not measured at the same time with the hardware fault out-
put by the sensor module.
The signal level is not evaluated unless the following conditions are satisfied:
- Sensor Module properties available (r0459.30 = 1, r0459.31 = 1).
- monitoring active (p0437.30 = 1, p0437.31 = 1).
Remedy: - check the speed range, frequency characteristic (amplitude characteristic) of the measuring equip-
ment may not be sufficient for the speed range.
- check that the encoder cables and shielding are routed in compliance with EMC.
- check the plug connections and contacts.
- check whether the zero mark is connected and the signal cables RP and RN connected correctly.
- replace the encoder cable.
- if the coding disk is soiled or the lighting worn, replace the encoder.
233110 <location>Encoder 3: Serial communications error
Message Fault cause: %1 bin
value:
Drive object: All objects
Reaction: A_INFEED: NONE
SERVO: OFF1 (IASC/DCBRAKE, NONE, OFF2, OFF3)
VECTOR: OFF1 (IASC/DCBRAKE, NONE, OFF2, OFF3)
Acknowledge: PULSE INHIBIT
Cause: Serial communication protocol transfer error between the encoder and evaluation module.
Fault value (r0949, interpret binary):
Bit 0: Alarm bit in the position protocol.
Bit 1: Incorrect quiescent level on the data line.
Bit 2: Encoder does not respond (does not supply a start bit within 50 ms).
Bit 3: CRC error: The checksum in the protocol from the encoder does not match the data.
Bit 4: Encoder acknowledgement error: The encoder incorrectly understood the task (request) or can-
not execute it.
Bit 5: Internal error in the serial driver: An illegal mode command was requested.
Bit 6: Timeout when cyclically reading.
Bit 8: Protocol is too long (e.g. > 64 bits).
Bit 9: Receive buffer overflow.
Bit 10: Frame error when reading twice.
Bit 11: Parity error.
Bit 12: Data line signal level error during the monoflop time.
Bit 13: Data line incorrect.
Remedy: Re fault value, bit 0 = 1:
- encoder defective. F31111 may provide additional details.
Re fault value, bit 1 = 1:
- Incorrect encoder type / replace the encoder or encoder cable.
Re fault value, bit 2 = 1:
- Incorrect encoder type / replace the encoder or encoder cable.
Re fault value, bit 3 = 1:
- EMC / connect the cable shield, replace the encoder or encoder cable.
Re fault value, bit 4 = 1:
- EMC / connect the cable shield, replace the encoder or encoder cable, replace the Sensor Module.
Re fault value, bit 5 = 1:
- EMC / connect the cable shield, replace the encoder or encoder cable, replace the Sensor Module.
Re fault value, bit 6 = 1:
- Update the firmware for the Sensor Module.
Re fault value, bit 8 = 1:
- Check the parameterization (p0429.2).
Re fault value, bit 9 = 1:
- EMC / connect the cable shield, replace the encoder or encoder cable, replace the Sensor Module.
Re fault value, bit 10 = 1:
- Check the parameterization (p0429.2, p0449).
© Siemens AG 2009 All Rights Reserved
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
Overview of Alarms
SINAMICS-Alarms
2-919