What it means
On Encoder 3 the drive compares the position information of the hall sensor / track C/D with tracks A/B. A33429 is raised when this difference becomes too large: the error for track C/D is greater than +/-15° mechanical or +/-60° electrical, or the error for the Hall signals is greater than +/-60° electrical. One period of track C/D corresponds to 360° mechanical, one period of the Hall signal to 360° electrical.
The message appears as an alarm; depending on the drive configuration, the same condition can also be output as a fault (F) or as a message without a reaction (N).
Why it appears
- The measured error for track C/D exceeds +/-15° mechanical or +/-60° electrical, or the measured error for the Hall signals exceeds +/-60° electrical.
- Hall sensors connected as an equivalent for the C/D tracks are connected with the incorrect rotational sense.
- The supply values used are not accurate enough.
What to check
- Check whether track C or D is not connected.
- Correct the direction of rotation of a Hall sensor possibly connected as an equivalent for track C/D.
- Check that the encoder cables are routed in compliance with EMC.
- Check the adjustment of the Hall sensor.
Reading the message value
- Track C/D affected: r2124 (interpret decimal) holds the measured deviation as a mechanical angle, 16 bits with sign, where 182 dec corresponds to 1°.
- Hall signals affected: r2124 (interpret decimal) holds the measured deviation as an electrical angle, 16 bits with sign, where 182 dec corresponds to 1°.
Parameters the manual names
- r2124 — alarm value of this message: read it as a decimal number to see the measured deviation, as a mechanical angle for track C/D or as an electrical angle for the Hall signals (182 dec corresponds to 1°).
Acknowledging and restarting
As an alarm, A33429 requires no acknowledgment and the drive takes no automatic action; the message points to a measuring deviation on Encoder 3 that should be resolved using the checks above. If the drive outputs the same condition as a fault, it must be acknowledged immediately before the drive can be restarted.
The same on every family
Every manual that describes A33429 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. 3158 |
| G130, G150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 3 | SINAMICS G130, G150 List Manual · p. 1830 |
The drives this code lives on
A33429 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 A33429 mean on a SINAMICS drive?
Encoder 3 reports that the position difference between the hall sensor/track C/D and tracks A/B is too large: more than +/-15° mechanical or +/-60° electrical for track C/D, or more than +/-60° electrical for the Hall signals.
How is the alarm value of A33429 interpreted?
The drive writes the measured deviation into r2124, to be read as a decimal number. For track C/D it is a mechanical angle, for the Hall signals an electrical angle; in both cases 16 bits with sign and 182 dec corresponds to 1°.
How do I fix alarm A33429?
Check whether track C or D is not connected, correct the rotational sense of a Hall sensor connected as an equivalent for track C/D, verify EMC-compliant routing of the encoder cables, and check the adjustment of the Hall sensor.
Does A33429 stop the drive or need an acknowledgment?
As an alarm it does not: the drive takes no automatic action and no acknowledgment is required. If the same condition is output as a fault, it must be acknowledged immediately before restart.
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