What it means
A31414 is raised when the drive evaluates the amplitude (C^2 + D^2) formed from track C or track D of Encoder 1 — or from the Hall signals — and finds it outside the tolerance bandwidth. The manuals give the condition two titles: Encoder 1: Amplitude error track C or D (C^2 + D^2)
on the G130 and G150, and Encoder 1: Signal level track C or D out of tolerance
on the S120 and S150; apart from the wording of the title, they describe the code identically.
The nominal signal level of the encoder must lie in the range 375 mV to 600 mV (500 mV -25/+20 %). Note the manual's remark: if the amplitude is not within the tolerance bandwidth, it cannot be used to initialize the start position.
Why it appears
- The signal level (C^2 + D^2) of track C or D of the encoder — or of the Hall signals — is not within the tolerance bandwidth.
- The response thresholds are below 230 mV (observe the frequency response of the encoder) and above 750 mV, while the nominal level must lie between 375 mV and 600 mV (500 mV -25/+20 %).
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 Sensor Module (e.g. contacts).
- Check the Hall sensor box.
Reading the message value
- The message value reads
C track: %1, D track: %2
— the drive indicates the signal level of track C and of track D. - The alarm value is stored in r2124 and must be interpreted hexadecimal; it reads yyyyxxxx hex.
- yyyy = Signal level, track D (16 bits with sign).
- xxxx = Signal level, track C (16 bits with sign).
- For orientation: a signal level of 500 mV peak value corresponds to the numerical value 5333 hex = 21299 dec.
Parameters the manual names
- r2124 — Alarm value: read the stored alarm value here and interpret it hexadecimal to obtain the signal level of track D (yyyy) and of track C (xxxx) for this code.
Acknowledging and restarting
As alarm A31414 the drive takes no automatic action and the code requires no acknowledgment. Depending on the drive's configuration, the same condition can also be issued as a fault (F) or with no reaction (N): the fault variant must be acknowledged immediately before the drive can be started again, the no-reaction variant needs no acknowledgment.
The same on every family
Every manual that describes A31414 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 1 | SINAMICS S120, S150 List Manual · p. 3050 |
| G130, G150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 1 | SINAMICS G130, G150 List Manual · p. 1736 |
The drives this code lives on
A31414 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 A31414 mean on a SINAMICS drive?
The drive has measured the amplitude (C^2 + D^2) of track C or D of Encoder 1 — or of the Hall signals — outside the tolerance bandwidth. The nominal signal level must lie between 375 mV and 600 mV (500 mV -25/+20 %).
How do I fix A31414?
Work through the manual's checks in order: EMC-compliant routing of the encoder cables, then the plug connections, replace the encoder or encoder cable if necessary, and check the Sensor Module (e.g. contacts) and the Hall sensor box.
How do I read the C and D signal levels for A31414?
Interpret the alarm value in r2124 as hexadecimal 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 A31414 have to be acknowledged?
As an alarm, no. If the drive's configuration issues the same condition as a fault, that fault must be acknowledged immediately; the no-reaction variant also needs no acknowledgment.
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 A31xxx group · SINAMICS manuals · Siemens manuals