What it means
Alarm A33432 (Encoder 3) reports that pulses have been lost or too many pulses have been counted on track A/B of the encoder. The rotor position adaptation is presently correcting these pulses, so the drive keeps running while the message signals an ongoing correction of the position. Depending on the drive configuration, the same condition can also be issued as a fault (F) or as a message without reaction (N).
Why it appears
- On track A/B of Encoder 3, pulses have been lost or too many pulses have been counted; the rotor position adaptation is presently correcting for these pulses.
What to check
- Check that the encoder cables are routed in compliance with EMC.
- Check the plug connections.
- Replace the encoder or the encoder cable.
- Check the encoder limit frequency.
- Adapt the parameter for the distance between zero marks (p0424, p0425).
Reading the message value
- The drive stores the alarm value in r2124; interpret the value as a decimal number.
- Value: the last measured deviation of the zero mark in increments, where 4 increments correspond to 1 encoder pulse.
- The sign of the value designates the direction of motion when detecting the zero mark distance.
Parameters the manual names
- r2124 — alarm value: read the last measured zero-mark deviation of this alarm here, interpreted as a decimal number.
- p0424 — encoder linear zero mark distance: adapt the distance between zero marks here for a linear encoder.
- p0425 — encoder rotary zero mark distance: adapt the distance between zero marks here for a rotary encoder.
Acknowledging and restarting
The alarm requires no acknowledgement: it only reports that the rotor position adaptation is correcting the deviation. If the drive is configured to raise the same condition as a fault, remedy the cause first and then acknowledge the fault immediately.
The same on every family
Every manual that describes A33432 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 3 | SINAMICS S120, S150 List Manual · p. 3159 |
| G130, G150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 3 | SINAMICS G130, G150 List Manual · p. 1831 |
The drives this code lives on
A33432 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 A33432 mean on a SINAMICS drive?
It reports that Encoder 3 has lost or additionally counted pulses on track A/B. The rotor position adaptation is currently correcting the deviation, and r2124 shows the last measured zero-mark deviation in increments (4 increments = 1 encoder pulse).
Does A33432 stop the drive?
No. As an alarm it triggers no reaction and the drive keeps operating while the deviation is corrected. If the same condition is configured as a fault instead, the fault must be acknowledged immediately after the cause has been remedied.
How do I clear A33432?
Check the EMC-compliant routing of the encoder cables and the plug connections, check the encoder limit frequency, and adapt the zero-mark distance in p0424 or p0425. Replace the encoder or encoder cable if the message keeps returning.
Where can I see how large the corrected deviation is?
In r2124, interpreted as a decimal number: the last measured deviation of the zero mark in increments, where 4 increments equal 1 encoder pulse. The sign gives the direction of motion when the zero mark distance was detected.
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 A33xxx group · SINAMICS manuals · Siemens manuals