What it means
F07556 is raised when the position tracking of the measuring gear is configured and the drive/encoder determines that the maximum possible absolute position actual value (r0483) cannot be represented within 32 bits. This maximum value is calculated as p0408 * p0412 * 2^p0419: the rotary encoder pulse number multiplied by the virtual rotary revolutions of the measuring gear absolute encoder, multiplied by 2 to the power of the fine resolution in bits. The manuals describe the fault the same way for SINAMICS G130, G150, S120 and S150.
Why it appears
- When the position tracking of the measuring gear is configured,
the drive/encoder identifies a maximum possible absolute position actual value (r0483) that cannot be represented within 32 bits
. Maximum value: p0408 * p0412 * 2^p0419.
What to check
- Read the fault value in r0949 (interpret decimal) and decode its hex representation aaaayyxx: yy gives the component number and xx the encoder data set — the same two values the message value shows.
- Reduce the fine resolution in p0419.
- Reduce the multiturn resolution of the measuring gear absolute encoder in p0412, so that the maximum value p0408 * p0412 * 2^p0419 can be represented within 32 bits again.
Reading the message value
- Message value: component number (%1) and encoder data set (%2).
- Fault value in r0949 (interpret decimal): aaaayyxx hex.
- yy: component number.
- xx: encoder data set.
Parameters the manual names
- p0408 — Rotary encoder pulse number / Rot enc pulse no: first factor of the maximum value p0408 * p0412 * 2^p0419; the remedy does not change it, but it determines how large the maximum value becomes.
- p0412 — Measuring gear absolute encoder rotary revolutions virtual / Abs rot rev: the multiturn resolution the remedy tells you to reduce.
- p0419 — Fine resolution absolute value Gx_XIST2 (in bits) / Enc fine Gx_XIST2: the fine resolution the remedy tells you to reduce, named first in the remedy.
- r0483 — CO: Encoder actual position value Gn_XIST2 / Enc Gn_XIST2: the absolute position actual value whose maximum possible value the fault refers to.
- r0949 — Fault value: read here (interpret decimal) to decode the component number and the encoder data set.
Acknowledging and restarting
Once p0419 and/or p0412 have been reduced so that the maximum value fits within 32 bits again, acknowledge the fault message immediately. The remedy names no further measures for this code.
What differs between the drive families
Straight from the manuals' own fields — F07556 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | — | — | Actual position/speed value incorrect or not available (11) | None | SINAMICS S120, S150 List Manual · p. 2844 |
| G130, G150 | NONE | IMMEDIATELY | Actual position/speed value incorrect or not available (11) | None | SINAMICS G130, G150 List Manual · p. 1579 |
The drives this code lives on
F07556 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 fault F07556 in SINAMICS mean?
With the position tracking of the measuring gear configured, the drive/encoder has identified a maximum possible absolute position actual value (r0483) that cannot be represented within 32 bits. The maximum value is p0408 * p0412 * 2^p0419.
How do I fix fault F07556?
Reduce the fine resolution in p0419 and the multiturn resolution in p0412 so that the maximum value p0408 * p0412 * 2^p0419 can be represented within 32 bits, then acknowledge the message immediately.
Which encoder triggered F07556?
Read the fault value in r0949 as a decimal number and decode its hex form aaaayyxx: yy is the component number and xx is the encoder data set. The message value shows the same two values.
Which parameters are involved in F07556?
The maximum value is built from p0408 (rotary encoder pulse number), p0412 (virtual rotary revolutions of the measuring gear absolute encoder) and p0419 (fine resolution in bits); the remedy is to reduce p0419 and p0412.
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 F07xxx group · SINAMICS manuals · Siemens manuals