What it means
C01751 is a safety message of the SI Motion P1 monitoring channel in the Control Unit (CU). It appears when the DRIVE-CLiQ encoder that supplies the signals for safe motion monitoring reports an error in connection with the effectivity tests. The drive stores a message value for this event in r9749; the manual states that this value is only for internal Siemens troubleshooting.
Why it appears
- The DRIVE-CLiQ encoder that provides the safe motion monitoring signals reports an error for the effectivity tests.
What to check
- Check the connection of the DRIVE-CLiQ encoder used for safe motion monitoring.
- Replace the encoder.
Reading the message value
- The drive writes the message value into r9749; the manual says to interpret it as a decimal number.
- There is no decoding of the value for use on site: the manual notes that it is only for internal Siemens troubleshooting.
Parameters the manual names
- r9749 (SI message value / SI msg_value) — holds the message value of C01751; read it as a decimal number. The manual assigns no on-site action to it, as the value serves only for internal Siemens troubleshooting.
Acknowledging and restarting
Once the encoder connection has been checked or the encoder replaced, the drive expects a POWER ON for the acknowledgment. The manual additionally describes a route that avoids this: This message can be acknowledged without a POWER ON as follows (safe acknowledgment)
— via the Terminal Module 54F (TM54F), the onboard F-DI (only CU310-2), PROFIsafe, or the machine control panel.
The same on every family
Every manual that describes C01751 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) | Encoder 1 | SINAMICS S120, S150 List Manual · p. 2697 |
| G130, G150 | NONE | IMMEDIATELY (POWER ON) | Safety monitoring channel has identified an error (10) | Encoder 1 | SINAMICS G130, G150 List Manual · p. 1476 |
The drives this code lives on
C01751 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 fault C01751 mean on a SINAMICS drive?
It is a safety message from the SI Motion P1 monitoring channel in the Control Unit: the DRIVE-CLiQ encoder for safe motion monitoring signals an error for the effectivity tests.
How do I fix fault C01751?
Check the connection of the safety-relevant DRIVE-CLiQ encoder and replace the encoder. Afterwards the message is acknowledged with a POWER ON or via one of the safe acknowledgment routes.
Can C01751 be acknowledged without switching the drive off and on?
Yes — the manual allows a safe acknowledgment without a POWER ON via the Terminal Module 54F (TM54F), the onboard F-DI (only CU310-2), PROFIsafe, or the machine control panel.
What is in the message value of C01751?
It is stored in r9749 and is interpreted as a decimal number. The manual states it is only for internal Siemens troubleshooting, so there is no decoding to apply on site.
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