Siemens Sinumerik 840D sl Diagnostic Manual page 922

Overview of Alarms
SINAMICS-Alarms
233117 <location>Encoder 3: Inversion error signals A and B and R
Message -
value:
Drive object: All objects
Reaction: A_INFEED: NONE
SERVO: OFF1 (IASC/DCBRAKE, NONE, OFF2, OFF3)
VECTOR: OFF1 (IASC/DCBRAKE, NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: For a square-wave signal encoder (TTL. bipolar. double ended) the A* and B* and R* signals are not
inverted with respect to signals A and B and R.
Note:
For CU310, CUA32, D410, SMC30 (only Order No. 6SL3055-0AA00-5CA0 and 6SL3055-0AA00-
5CA1), the following applies:
A squarewave encoder without track R is used and the track monitoring (p0405.2 = 1) is activated.
Remedy: - check the setting of p0405: p0405.2 = 1 is only possible if the encoder is connected at X520.
- check the encoder/cable: Does the encoder supply TTL signals and the associated inverted signals?
Note:
For a squarewave encoder without track R, the following jumpers must be set at the encoder connec-
tion:
- pin 10 (reference signal R) <--> pin 7 (encoder power supply, ground)
- pin 11 (reference signal R inverted) <--> pin 4 (encoder power supply)
233118 <location>Encoder 3: Speed difference outside the tolerance range
Message %1
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: For an HTL/TTL encoder, the speed difference has exceeded the value in p0492 over several sam-
pling cycles.
The change to the averaged speed actual value - if applicable - is monitored in the current controller
sampling time.
Fault value (r0949, interpret decimal):
Only for internal Siemens troubleshooting.
See also: p0492
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).
233120 <location>Encoder 3: Power supply voltage fault
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: Encoder 3 power supply voltage fault.
Note:
If the encoder cables 6FX2002-2EQ00-.... and 6FX2002-2CH00-.... are interchanged, this can result
in the encoder being destroyed because the pins of the operating voltage are reversed.
Fault value (r0949, interpret binary):
Bit 0: Undervoltage condition on the sense line.
Bit 1: Overcurrent condition for the encoder power supply.
2-922
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG 2009 All Rights Reserved
03/2009