What it means
Encoder 3 reports that the signal level (C^2 + D^2) of track C or D — measured at the encoder or at the Hall signals — is not within the tolerance bandwidth. The nominal signal level of the encoder must lie in the range 375 mV to 600 mV (500 mV -25/+20 %); the response thresholds are under 230 mV (observe the frequency response of the encoder) and over 750 mV. A signal level of 500 mV peak value corresponds to the numerical value 5333 hex = 21299 dec. While the amplitude is outside the tolerance bandwidth, it cannot be used to initialize the start position. Depending on the drive's configuration, the same condition can also be output as a fault (F) or as a message without any reaction (N) instead of this alarm.
Why it appears
- Encoder 3 measures a signal level (C^2 + D^2) on track C or track D — at the encoder itself or at the Hall signals — that lies outside the tolerance bandwidth.
What to check
- Check that the routing of the encoder cables complies with EMC requirements.
- Check the plug connections.
- Replace the encoder or the encoder cable.
- Check the Sensor Module, for example its contacts.
- Check the Hall sensor box.
Reading the message value
- The message text reports both tracks: 'C track: %1, D track: %2'.
- The drive writes the measured levels to r2124; interpret the alarm value hexadecimal as yyyyxxxx, where yyyy is the signal level of track D (16 bits with sign) and xxxx is the signal level of track C (16 bits with sign).
- A signal level of 500 mV peak value corresponds to the numerical value 5333 hex = 21299 dec, which you can use as the reference when reading r2124.
Parameters the manual names
- r2124 — alarm value: read it here (interpret hexadecimal) to see the measured signal levels of tracks C and D that triggered A33414.
Acknowledging and restarting
As an alarm, A33414 needs no acknowledgement: it clears as soon as the signal level of tracks C and D is back within the tolerance bandwidth. If the drive is configured to raise the same condition as a fault instead, that fault must be acknowledged immediately; in the variant without any reaction there is nothing to acknowledge.
The same on every family
Every manual that describes A33414 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. 3155 |
| G130, G150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 3 | SINAMICS G130, G150 List Manual · p. 1827 |
The drives this code lives on
A33414 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 SINAMICS alarm A33414 mean?
Encoder 3 reports that the signal level (C^2 + D^2) of track C or D — at the encoder or the Hall signals — is outside the tolerance bandwidth. The nominal level is 375-600 mV (500 mV -25/+20 %), with response thresholds under 230 mV and over 750 mV.
How do I fix SINAMICS alarm A33414?
First check that the encoder cables are routed in compliance with EMC and inspect the plug connections. Then replace the encoder or the encoder cable if necessary, and check the Sensor Module contacts and the Hall sensor box.
Where do I read the track C and D signal levels for A33414?
In r2124, interpreted hexadecimal as yyyyxxxx: yyyy is the signal level of track D and xxxx that of track C, each 16 bits with sign. A level of 500 mV peak value corresponds to 5333 hex = 21299 dec.
Does A33414 require an acknowledgement?
No — as an alarm it needs no acknowledgement and clears once the signal level is back within tolerance. If the drive is configured to output the condition as a fault, that fault must be acknowledged immediately.
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