What it means
A01224 is an alarm raised by the CU. It appears when, after the minimum pulse frequency (p0113) has been changed, the CU identifies an inconsistency between the pulse frequencies — the value entered in p0113 does not fit one of the pulse-frequency rules the drive checks. The alarm value in r2124, read as a decimal number, states which rule was violated. The SINAMICS G130/G150 and S120/S150 documentation describe this alarm identically.
Why it appears
- When the minimum pulse frequency (p0113) was changed, an inconsistency between the pulse frequencies was identified.
- Which rule the new value failed is shown by the alarm value in r2124 (see the alarm value list below).
What to check
- Read the alarm value in r2124 as a decimal number to see why the value was rejected.
- Set a valid pulse frequency in p0113 (Minimum pulse frequency, selection) so that the pulse frequencies are consistent again.
- For alarm value 116, use the recommended clock cycle that the CU shows in r0116[0...1] as the reference for the new setting.
Reading the message value
- The alarm value is stored in r2124 and is interpreted as a decimal number.
- 1: value lower than the minimum value.
- 2: value higher than the maximum value.
- 3: the resulting sampling time is not a multiple of 1.25 µs.
- 4: the value does not match clock-cycle synchronous (isochronous) PROFIBUS operation.
- 10: a special restriction of the drive object is violated.
- 99: an inconsistency across drive objects was detected.
- 116: the recommended clock cycle is shown in r0116[0...1].
Parameters the manual names
- p0113 (Minimum pulse frequency, selection) — the parameter whose change triggers the check; set the valid pulse frequency here.
- r2124 (Alarm value) — read here, interpreted as a decimal number, to see which inconsistency the CU detected.
- r0116 (Drive object clock cycle recommended) — for alarm value 116, the recommended clock cycle is shown in r0116[0...1].
Acknowledging and restarting
No acknowledgement is required for this alarm. The remedy is to set a valid pulse frequency in p0113 so that the pulse frequencies are consistent again; the alarm value in r2124 shows which condition the previous setting violated.
The same on every family
Every manual that describes A01224 gives it the same reaction, acknowledgement and message class.
| 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. 1396 |
| S120, S150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS S120, S150 List Manual · p. 2584 |
The drives this code lives on
A01224 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 A01224 mean?
The CU raised A01224 because, when the minimum pulse frequency (p0113) was changed, it identified an inconsistency between the pulse frequencies. The alarm value in r2124, read as a decimal number, states which rule the value violates.
How do I fix alarm A01224?
Read the alarm value in r2124 and set a valid pulse frequency in p0113. If the alarm value is 116, the recommended clock cycle is shown in r0116[0...1] and the new setting should be consistent with it.
Does A01224 need to be acknowledged?
No. The alarm requires no acknowledgement; it is resolved by setting a consistent pulse frequency in p0113.
What does alarm value 3 for A01224 mean?
It means the resulting sampling time is not a multiple of 1.25 µs. Select a pulse frequency whose resulting sampling time lies on this grid.
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 A01xxx group · SINAMICS manuals · Siemens manuals