What it means
F01015 is raised when the software in the Control Unit (CU) runs into an internal error condition. The manuals describe the cause with that single sentence and give no further detail, so this fault points at the drive's own software. The value the drive stores with the fault is expressly reserved for internal Siemens troubleshooting and cannot be decoded with the manual. In the G115D fault list the same code appears under the title "Software fault in CU".
Why it appears
- The Control Unit (CU) has detected an internal software error; the manuals name no further cause for this code.
What to check
- Carry out a POWER ON for all components: switch the drive off and switch it on again.
- Upgrade the firmware to a later version.
- If the fault occurs again after the power cycle and the firmware upgrade, contact Technical Support.
Reading the message value
- The drive stores the fault value in r0949; read it as a decimal number.
- The manual gives no decoding for this value:
Only for internal Siemens troubleshooting.
Parameters the manual names
- r0949 — fault value: holds the value belonging to F01015 as a decimal number; for this code the manual provides no decoding of that value.
Acknowledging and restarting
The drive goes OFF2 — it coasts down and will not restart until the fault is acknowledged. This fault is acknowledged only with a POWER ON: switch the power supply off and on again for all components; acknowledging without switching the supply off and on does not clear it. If the internal software error returns after switching on, upgrade the firmware to a later version and then contact Technical Support.
What differs between the drive families
Straight from the manuals' own fields — F01015 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 | POWER ON | Hardware/software error (1) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 2560 |
| G130, G150 | OFF2 | POWER ON | Hardware/software error (1) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1374 |
| G120 | OFF2 | POWER ON | Hardware/software error (1) | — | SINAMICS G120 · p. 821 |
| G120XA | OFF2 | POWER ON | — | — | SINAMICS G120XA PN converter · p. 1098 |
| G115D | — | — | — | — | SINAMICS G115D distributed drive · p. 391 |
| G120C | — | — | — | — | SINAMICS G120C Converters · p. 382 |
The drives this code lives on
F01015 is described for G115D, G120, G120C, 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 F01015 mean?
It is an internal software error: the Control Unit (CU) has detected an internal error condition in its software. The manuals give no more detailed cause.
How do I clear fault F01015?
Only with a POWER ON: switch the power supply off and on again for all components. An acknowledgement without switching the supply off and on does not clear the fault.
What is the fault value of F01015 in r0949?
The drive stores a decimal value in r0949, but the manual does not decode it — the value is reserved for internal Siemens troubleshooting.
F01015 keeps coming back after a power cycle — what now?
Upgrade the firmware to a later version. If the fault still occurs afterwards, contact Technical Support.
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 F01xxx group · SINAMICS manuals · Siemens manuals