What it means
A02056 — “Trace: Recording cycle too short” — is an alarm from the trace function: the recording cycle selected for the trace is shorter than the basic clock cycle of the drive. For G130, G150, S120 and S150 the manuals tie this limit to the selected basic clock cycle 0 in p0110[0]; the G120 manual states the same limit directly as the basic clock cycle 500µs. With the cycle as set, the trace cannot record, so the trace cycle has to be corrected in the parameterization.
Why it appears
- The trace has been given a recording cycle that is shorter than the selected basic clock cycle 0, which is set in p0110[0]. The cycle itself is held in p4720 (Trace recording cycle), to which the manuals refer for this message.
- On G120 the same condition is worded with the concrete value: the selected recording clock cycle is lower than the basic clock cycle 500µs.
What to check
- Read the trace recording cycle currently set in p4720.
- Compare it with the basic clock cycle that applies: basic clock cycle 0 in p0110[0] (on G120: the basic clock cycle 500µs).
- Increase the value for the trace cycle in p4720 until the recording cycle is no shorter than this basic clock cycle.
Parameters the manual names
- p4720 (Trace recording cycle / Trace record_cyc) — the trace cycle whose value this alarm requires you to increase; it must not be set shorter than the basic clock cycle.
Acknowledging and restarting
The alarm follows directly from the p4720 setting: once the trace cycle has been increased so that it no longer falls below the basic clock cycle (p0110[0]; 500µs on G120), the message disappears by itself.
What differs between the drive families
Straight from the manuals' own fields — A02056 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS G130, G150 List Manual · p. 1505 |
| S120, S150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS S120, S150 List Manual · p. 2730 |
| G120 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | — | SINAMICS G120 · p. 863 |
The drives this code lives on
A02056 is described for G120, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A02056 Trace: Recording cycle too short mean?
The trace function has been given a recording cycle that is shorter than the drive's basic clock cycle — basic clock cycle 0 in p0110[0], which the G120 manual gives as 500µs.
How do I fix A02056?
Increase the value of the trace recording cycle in p4720 until it is no shorter than the basic clock cycle. The alarm then disappears by itself.
Which parameter does A02056 refer to?
p4720 (Trace recording cycle). The limit it must not fall below is the basic clock cycle 0 set in p0110[0].
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 A02xxx group · SINAMICS manuals · Siemens manuals
