What it means
F01786 reports that the signal source of a Safety Control Channel (SCC) control word was changed — in p10235 or in p10250. The new signal source is effective immediately. The drive itself takes no action on this code; the message only has to be acknowledged immediately. The G130/G150 and S120/S150 manuals describe this fault identically, so the same explanation applies on all of these drives.
Why it appears
- The signal source assigned in p10235 was changed.
- The signal source assigned in p10250 was changed.
What to check
- Acknowledge the fault — the manual gives no other remedy for this code.
- No further measures follow: the changed signal source is already in effect.
Parameters the manual names
- p10235 — signal source of the SI Safety Control Channel control word S_STW3B; changing this source raises F01786.
- p10250 — signal source of the SI Safety Control Channel control word S_STW1B; changing this source also raises F01786.
Acknowledging and restarting
Acknowledge the fault immediately. The drive does not trip on this code, and once the message is acknowledged no further restart steps are described — the new signal source is already effective.
The same on every family
Every manual that describes F01786 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | IMMEDIATELY | Safety monitoring channel has identified an error (10) | None | SINAMICS S120, S150 List Manual · p. 2704 |
| G130, G150 | NONE | IMMEDIATELY | Safety monitoring channel has identified an error (10) | None | SINAMICS G130, G150 List Manual · p. 1483 |
The drives this code lives on
F01786 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 F01786 mean on a SINAMICS drive?
The signal source of a Safety Control Channel (SCC) control word was changed, in p10235 or p10250. The new signal source is effective immediately.
How do I clear fault F01786?
Acknowledge the fault — that is the only remedy the manual gives. The new signal source is already in effect, so nothing else has to be done.
Does F01786 stop the drive?
No. The drive takes no action on this fault; it only has to be acknowledged immediately.
Which parameters are behind F01786?
p10235, the SCC control word S_STW3B, and p10250, the SCC control word S_STW1B. Changing the signal source of either one raises the fault.
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