What it means
F02151 means an internal software error. Where the drive software runs as a Technology Extension (TEC), the error is inside that extension — the manuals title the message TEC: internal software error
. Where the manual titles it OA: Internal software error
, the same error has occurred within an OA (Open Architecture) application. Both wordings describe one and the same event: software on the Control Unit has failed internally, and the manuals name no cause beyond that internal error. Depending on the drive's configuration, the condition can also be issued as an alarm (A) instead of a fault. While the fault is active the drive coasts down, and the message must be acknowledged before the drive will restart.
Why it appears
- An internal software error has occurred within a Technology Extension (TEC) — the wording used for this code on S120, S150, G130 and G150.
- The same code is described as an internal software error within an OA (Open Architecture) application on G120 and G120XA.
What to check
- Carry out a
POWER ON (switch-off/switch-on)
for all components. - Upgrade the firmware to a later version.
- Contact Technical Support if the error persists.
- Replace the Control Unit.
Reading the message value
- The drive stores the message value in r0949; the manual instructs interpreting it hexadecimal.
- The manuals publish no decoding of this value: per the cause text it is
Only for internal Siemens troubleshooting.
Parameters the manual names
- r0949 — fault value: displays the value of this message, interpreted hexadecimal; the manuals reserve it for internal Siemens troubleshooting.
- r4950 — TEC DO-specific number: the number (quantity) of Technology Extension drive objects, which the manuals cross-reference from this message.
- r4955 — TEC DO-specific identifier: identifier of a Technology Extension drive object, referenced from this message.
- p4956 — TEC DO-specific activation: activation of a Technology Extension drive object, referenced from this message.
- r4957 — TEC DO-specific version: version of a Technology Extension drive object, referenced from this message.
Acknowledging and restarting
Acknowledge the fault immediately, and the acknowledgement takes the form of a POWER ON: switch all components off and on again — the step with which the remedy begins. After the power cycle the drive can be restarted. If F02151 reappears, continue with the remaining remedy steps: firmware upgrade, Technical Support and, as the last step, replacement of the Control Unit.
What differs between the drive families
Straight from the manuals' own fields — F02151 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: OFF2 (NONE, OFF1) Servo: OFF2 (NONE, OFF1, OFF3) Vector: OFF2 (NONE, OFF1, OFF3) Hla: OFF2 (NONE, OFF1, OFF3) | IMMEDIATELY (POWER ON) | Hardware/software error (1) | None | SINAMICS S120, S150 List Manual · p. 2736 |
| G130, G150 | Vector: OFF2 (NONE, OFF1, OFF3) Infeed: OFF2 (NONE, OFF1) | IMMEDIATELY (POWER ON) | Hardware/software error (1) | None | SINAMICS G130, G150 List Manual · p. 1510 |
| G120XA | OFF2 (NONE, OFF1, OFF3) | IMMEDIATELY (POWER ON) | — | — | SINAMICS G120XA PN converter · p. 1115 |
| G120 | OFF2 (NONE, OFF1, OFF3) | IMMEDIATELY (POWER ON) | Hardware/software error (1) | — | SINAMICS G120 · p. 866 |
The drives this code lives on
F02151 is described for G120, G120XA, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS fault F02151 mean?
It reports an internal software error inside a Technology Extension (TEC) or, on drives whose manual uses the OA wording, inside an Open Architecture application. The manuals name no cause beyond that internal error.
How do I clear fault F02151?
Carry out a POWER ON (switch-off/switch-on) for all components. If the fault returns, upgrade the firmware to a later version, contact Technical Support, and replace the Control Unit as the final step.
Can F02151 also be signalled as an alarm?
Yes. The manuals also list the condition as an alarm (A), and the drive's configuration decides which form is issued.
Should I decode the fault value of F02151 in r0949?
No. The value is interpreted hexadecimal, but the manuals reserve it for internal Siemens troubleshooting and print no decoding.
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 F02xxx group · SINAMICS manuals · Siemens manuals