What it means
A35907 reports that a Terminal Module (TM) was not successfully initialized. Depending on how the drive is configured, the same condition can also be issued as a fault or reported with no reaction at all. Which of three initialization problems occurred is stored as an alarm value in r2124, which the manual says to interpret as a hexadecimal number.
Why it appears
- The Terminal Module was not initialized successfully.
- On a TM17 or TM41, one of three things went wrong: an incorrect configuration request was made, the programming did not succeed, or the time stamp was invalid — the alarm value in r2124 says which of the three applies.
What to check
- Read the alarm value in r2124, interpreting it as a hexadecimal number: 01, 02 or 04 identifies which TM17 or TM41 initialization problem occurred.
- Carry out a POWER ON — switch the drive's power supply off and back on. The manual gives this as the only remedy for the message.
Reading the message value
The alarm value belonging to this message is stored in r2124; interpret it as a hexadecimal number.
- 01 — TM17 or TM41: incorrect configuration request.
- 02 — TM17 or TM41: programming not successful.
- 04 — TM17 or TM41: invalid time stamp.
Parameters the manual names
- r2124 — holds the alarm value belonging to this message; read it as a hexadecimal number to tell which of the three TM17/TM41 initialization problems raised A35907.
Acknowledging and restarting
Remedy, acknowledgement and restart are one and the same step here: carry out a POWER ON, i.e. switch the drive's power supply off and back on again. Where the condition is configured as a fault, this POWER ON is also what acknowledges it; with the no-reaction configuration the message needs no acknowledgement at all.
What differs between the drive families
Straight from the manuals' own fields — A35907 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | — | — | Hardware/software error (1) | Terminal Module (TM) | SINAMICS S120, S150 List Manual · p. 3242 |
| G130, G150 | NONE | NONE | Hardware/software error (1) | Terminal Module (TM) | SINAMICS G130, G150 List Manual · p. 1905 |
The drives this code lives on
A35907 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 alarm A35907 mean on a SINAMICS drive?
It means a Terminal Module (TM) was not successfully initialized. The alarm value in r2124 shows which TM17 or TM41 initialization problem the module reported.
How do I fix and acknowledge A35907?
Carry out a POWER ON: switch the drive's power supply off and back on. If the condition is configured as a fault, this POWER ON also acknowledges it.
What do the alarm values 01, 02 and 04 for A35907 mean?
Read in hexadecimal: 01 is an incorrect configuration request, 02 means the programming was not successful and 04 means an invalid time stamp — in each case on a TM17 or TM41.
Can A35907 also appear as a fault?
Yes. Depending on how the drive is configured, the same condition can also be issued as a fault or reported with no reaction at all.
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 A35xxx group · SINAMICS manuals · Siemens manuals