What it means
A33419 tells you that the signal evaluation of Encoder 3 can only just keep the A or B track signals within range: the amplitude, phase or offset correction applied to one of the two tracks has reached its limit. The same condition can also be output as a fault or as a message with no reaction — which of the three forms appears is decided by the drive configuration. As an alarm, the condition does not force the drive to stop.
Why it appears
- The amplitude/phase/offset correction for track A or B of Encoder 3 is at the limit.
- The limits the drive works to: the amplitude error correction when Amplitude B / Amplitude A = 0.78 ... 1.27, the phase correction when the phase is 96 degrees, and the offset correction at +/-140 mV with an SMC20 or +/-650 mV with an SMC10.
What to check
- For encoders without their own bearings (for example toothed-wheel encoders), check the mechanical mounting tolerances.
- Check the plug connections, including the transition resistance.
- Check the encoder signals.
- Replace the encoder or the encoder cable.
Reading the message value
The drive stores the message value as the alarm value in r2124; the manual specifies interpreting it hexadecimal. The digit positions tell you which correction on which track has hit its minimum or maximum:
- xxxx1: Minimum of the offset correction, track B
- xxxx2: Maximum of the offset correction, track B
- xxx1x: Minimum of the offset correction, track A
- xxx2x: Maximum of the offset correction, track A
- xx1xx: Minimum of the amplitude correction, track B/A
- xx2xx: Maximum of the amplitude correction, track B/A
- x1xxx: Minimum of the phase error correction
- x2xxx: Maximum of the phase error correction
- 1xxxx: Minimum of the cubic correction
- 2xxxx: Maximum of the cubic correction
Parameters the manual names
- r2124 — alarm value: read it hexadecimal to see which correction (offset, amplitude, phase or cubic) on which track has reached its minimum or maximum and so triggered A33419.
Acknowledging and restarting
No acknowledgement is needed for the alarm form: it withdraws itself once the corrections for tracks A and B are back inside the limits. If the drive is configured to output the same condition as a fault, the fault does not switch the drive off by itself, but it must be acknowledged immediately before a restart.
The same on every family
Every manual that describes A33419 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. 3157 |
| G130, G150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 3 | SINAMICS G130, G150 List Manual · p. 1829 |
The drives this code lives on
A33419 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 A33419 mean?
The amplitude, phase or offset correction that the drive applies to the A or B track signals of Encoder 3 has reached its limit, so the raw signals can only just be brought back into range. The same condition can also be issued as a fault or with no reaction, depending on the configuration.
How do I fix alarm A33419?
Check the mechanical mounting tolerances for encoders without their own bearings such as toothed-wheel encoders, then the plug connections including the transition resistance, and check the encoder signals. If the alarm stays, replace the encoder or the encoder cable.
Does A33419 need to be acknowledged?
As an alarm, no — it goes away by itself once the corrections are back within tolerance. If the drive raises the same condition as a fault, that fault must be acknowledged immediately before restarting.
How do I read out which limit A33419 refers to?
Read the alarm value in r2124 and interpret it hexadecimal. Each digit position identifies the correction concerned — offset, amplitude, phase or cubic — together with the track and whether the minimum or maximum was reached.
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