What it means
A32412 is raised when Encoder 2 reports a problem from inside itself: it sets an error bit in the serial protocol that carries its position values, and the drive reads that bit from the encoder. The manuals print this message as Encoder 2: Encoder signals an internal alarm
on S120/S150 and as Encoder 2: Error bit set in the serial protocol
on G130/G150; both wordings describe the same condition on the same component. Depending on how the drive is configured, the same condition can also be issued as a fault or as a message with no reaction (N). The message value shows which bit the encoder has set.
Why it appears
- Encoder 2 signals an internal alarm: it sends a set error bit to the drive via the serial protocol used for its position values.
What to check
- Carry out a POWER ON (switch-off/switch-on) for all components.
- Check that the encoder cables are routed in compliance with EMC.
- Check the plug connections.
- Replace the encoder.
Reading the message value
- The message value is the alarm value stored in r2124; interpret it binary.
- Bit 0: Fault bit in the position protocol.
- Bit 1: Alarm bit in the position protocol.
Parameters the manual names
- r2124 — read this alarm value as a binary pattern to see whether Encoder 2 has set the fault bit (bit 0) or the alarm bit (bit 1) in its position protocol.
Acknowledging and restarting
As an alarm, A32412 needs no acknowledgement; it clears itself once Encoder 2 no longer sets the error bit — after the POWER ON or the encoder replacement above. If the drive is configured to issue the same condition as a fault, it must be acknowledged immediately once the cause has been remedied.
The same on every family
Every manual that describes A32412 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 2 | SINAMICS S120, S150 List Manual · p. 3104 |
| G130, G150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 2 | SINAMICS G130, G150 List Manual · p. 1782 |
The drives this code lives on
A32412 is described for G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A32412 mean on a SINAMICS drive?
It means Encoder 2 reports an internal alarm: the encoder sets an error bit in the serial protocol that transmits its position values. Bit 0 of r2124 marks the fault bit and bit 1 the alarm bit in the position protocol.
How do I clear alarm A32412?
Switch all components off and on again (POWER ON), check that the encoder cables are routed in compliance with EMC and that the plug connections are seated. If the message keeps coming back, replace the encoder.
Does A32412 have to be acknowledged?
No — in its alarm form the message needs no acknowledgement and resets itself once the encoder stops setting the error bit. If the drive is configured to issue the same condition as a fault, it must be acknowledged immediately after the cause is fixed.
Which parameter shows the details of A32412?
r2124 holds the alarm value. Read it binary: bit 0 set means the fault bit in the position protocol, bit 1 set means the alarm bit.
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the A32xxx group · SINAMICS manuals · Siemens manuals