What it means
C01797 is a Safety Integrated (SI) message of the SI Motion P1 monitoring on the Control Unit (CU): the axis is not safely referenced. The drive raises it when the standstill position that was saved before switching off does not match the actual position determined at switch-on. The drive does not perform a stop in response to this message; the condition must be resolved by re-establishing a safety-relevant reference for the axis.
Why it appears
- The standstill position saved before the drive was switched off does not match the actual position determined at switch-on.
What to check
- Determine whether safe automatic referencing of the axis is possible.
- If safe automatic referencing is not possible, the user must issue a user agreement for the new position using the softkey; this position is then designated as safety-relevant.
Reading the message value
The drive stores the message value in r9749; interpret it as a decimal value:
- 1: Axis not safely referenced.
- 2: User agreement missing.
Parameters the manual names
- r9749 (SI message value / SI msg_value) — read the message value of this message here as a decimal number: 1 means the axis is not safely referenced, 2 means the user agreement is missing.
Acknowledging and restarting
Acknowledge the message immediately with a POWER ON: switch the drive off and on again. Before restarting, make sure the safe reference has been restored — either by safe automatic referencing or by the user agreement issued via the softkey, as described above.
The same on every family
Every manual that describes C01797 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | IMMEDIATELY (POWER ON) | Safety monitoring channel has identified an error (10) | None | SINAMICS S120, S150 List Manual · p. 2707 |
| G130, G150 | NONE | IMMEDIATELY (POWER ON) | Safety monitoring channel has identified an error (10) | None | SINAMICS G130, G150 List Manual · p. 1486 |
The drives this code lives on
C01797 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 SINAMICS fault C01797 mean?
It is an SI Motion P1 safety message from the Control Unit: the standstill position saved before switching off does not match the actual position determined at switch-on, so the axis is not safely referenced.
How do I clear C01797?
If safe automatic referencing is not possible, the user must issue a user agreement for the new position using the softkey; that position is then designated as safety-relevant. The message is then acknowledged by switching the drive off and on again (POWER ON).
What do the message values 1 and 2 in r9749 mean for C01797?
Read r9749 as a decimal value: 1 means the axis is not safely referenced, and 2 means the user agreement is missing.
Does C01797 stop the drive?
No — the drive does not execute a stop reaction for this message; it reports the missing safe reference. The message still has to be acknowledged immediately with a POWER ON.
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 C01xxx group · SINAMICS manuals · Siemens manuals