What it means
F01000 (Internal software error) is raised when the Control Unit (CU) of the drive detects an internal software error. The manual lists the fault for SINAMICS G120, G120C, G120XA, G115D, G130, G150, S120 and S150; the G115D manual titles the same condition Software fault in CU
. The fault value stored in r0949 gives the technician no cause to act on — per the manual it is Only for internal Siemens troubleshooting
— so clearing the fault follows a fixed sequence of steps rather than a diagnosis.
Why it appears
- An internal software error has occurred in the Control Unit.
- The manual names no further cause; the fault value (r0949, to be interpreted hexadecimal) is intended
Only for internal Siemens troubleshooting
.
What to check
- Evaluate the fault buffer (r0945).
- Carry out a POWER ON (switch-off/switch-on) for all components.
- If required, check the data on the non-volatile memory (e.g. memory card).
- Upgrade the firmware to a later version.
- Contact Technical Support.
- Replace the Control Unit.
Reading the message value
- The drive writes the fault value to r0949; for this fault it is to be interpreted hexadecimal and serves
Only for internal Siemens troubleshooting
. - Where the entry prints a message value, it reads
Module: %1, line: %2
— the value identifies the software module and the line in which the error occurred.
Parameters the manual names
- r0945 (fault code) — the fault buffer; evaluating it is the first remedy step for F01000.
- r0949 (fault value) — read it hexadecimal for this fault; per the manual the value is used only for internal Siemens troubleshooting.
Acknowledging and restarting
The fault is acknowledged with a POWER ON: switch the power off and then on again for all components. If F01000 returns afterwards, continue with the remaining remedy steps — check the data on the non-volatile memory, upgrade the firmware and contact Technical Support — before replacing the Control Unit.
What differs between the drive families
Straight from the manuals' own fields — F01000 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | OFF2 | POWER ON | Hardware/software error (1) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1369 |
| S120, S150 | OFF2 | POWER ON | Hardware/software error (1) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 2555 |
| G120 | OFF2 | POWER ON | Hardware/software error (1) | — | SINAMICS G120 · p. 819 |
| G120XA | OFF2 | POWER ON | — | — | SINAMICS G120XA PN converter · p. 1096 |
| G115D | — | — | — | — | SINAMICS G115D distributed drive · p. 391 |
| G120C | — | — | — | — | SINAMICS G120C Converters · p. 382 |
The drives this code lives on
F01000 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 F01000 mean?
The Control Unit has detected an internal software error. The fault value (r0949, hexadecimal) is meant only for internal Siemens troubleshooting, so it tells you nothing further about the cause.
How do I reset fault F01000?
Switch the power off and on again (POWER ON) for all components. Before that, evaluate the fault buffer r0945; if the fault returns, check the non-volatile memory data and upgrade the firmware.
Do I have to replace the Control Unit when F01000 appears?
Not immediately. Replacement of the Control Unit is the last step of the remedy, after a power-on, a check of the memory card data and a firmware upgrade have not cleared the fault.
Why does F01000 keep coming back after a restart?
Then the software error is persistent: check the data on the non-volatile memory (e.g. memory card), upgrade the firmware to a later version and, if it still recurs, 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