What it means
C01701 “SI Motion P1 (CU): STOP B initiated” is a safety message of the Safety Integrated (SI) Motion monitoring in the CU: the drive is brought to a standstill with a STOP B, braking along the OFF3 deceleration ramp. The message also announces the next stage of the stop — as a result of this fault, message C01700 “STOP A initiated” is output once the time parameterized in p9556 has expired or the speed threshold parameterized in p9560 has been undershot; on the G120, C01700 follows once the speed threshold parameterized in p9560 is fallen below.
Why it appears
- A stop request from the second monitoring channel — the G120 manual words this as a stop request from processor 2.
- A subsequent response to C01714 “SI Motion CU: Safely-Limited Speed exceeded”.
- A subsequent response to C01711 “SI Motion CU: Defect in a monitoring channel”.
- A subsequent response to C01707 “SI Motion CU: tolerance for safe operating stop exceeded”.
- A subsequent response to C01715 “SI Motion CU: Safely-Limited Position exceeded” or to C01716 “SI Motion CU: tolerance for safe motion direction exceeded” — the S120, S150, G130 and G150 manuals also list these two causes, which the G120 manual does not.
What to check
- Remove the cause of the fault on the second monitoring channel — on the G120, on the monitoring channel of processor 2.
- Carry out a diagnostics routine for C01714.
- Carry out a diagnostics routine for C01711.
- Carry out a diagnostics routine for C01707.
- On the S120, S150, G130 and G150, also carry out a diagnostics routine for C01715 and for C01716.
Parameters the manual names
- p9556 — SI Motion STOP A delay time (Control Unit): during this STOP B, C01700 “STOP A initiated” is output once this delay time has expired; the S120, S150, G130 and G150 manuals name it for this message.
- p9560 — SI Motion STO shutdown velocity (Control Unit): the speed threshold for this stop — C01700 “STOP A initiated” is output once the speed undershoots p9560; on the G120 this threshold alone determines when C01700 follows.
Acknowledging and restarting
The manuals describe how this message can be acknowledged without a POWER ON (safe acknowledgment): via the Terminal Module 54F (TM54F), the onboard F-DI (only CU310-2), PROFIsafe or the machine control panel. On the G120, the message is acknowledged without a POWER ON using “Acknowledge internal event”. Remove the cause of the fault before the drive is restarted.
What differs between the drive families
Straight from the manuals' own fields — C01701 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE (OFF3) | IMMEDIATELY (POWER ON) | Safety monitoring channel has identified an error (10) | None | SINAMICS S120, S150 List Manual · p. 2675 |
| G130, G150 | NONE (OFF3) | IMMEDIATELY (POWER ON) | Safety monitoring channel has identified an error (10) | None | SINAMICS G130, G150 List Manual · p. 1463 |
| G120 | NONE (OFF3) | IMMEDIATELY (POWER ON) | Safety monitoring channel has identified an error (10) | — | SINAMICS G120 · p. 852 |
The drives this code lives on
C01701 is described for G120, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does C01701 in a SINAMICS drive mean?
The Safety Integrated (SI) Motion monitoring has stopped the drive with a STOP B, braking it along the OFF3 deceleration ramp. As a result of this fault, C01700 “STOP A initiated” follows once the p9556 delay has expired or the speed has undershot p9560.
Why did my drive report C01701?
Either the second monitoring channel issued a stop request (processor 2 on the G120), or the message is the follow-on reaction to C01714, C01711 or C01707 — on the S120, S150, G130 and G150 also to C01715 or C01716.
How can C01701 be acknowledged without a POWER ON?
Via a safe acknowledgment route: Terminal Module 54F (TM54F), onboard F-DI (only CU310-2), PROFIsafe or the machine control panel. On the G120, acknowledge the message using “Acknowledge internal event”.
Which parameters belong to C01701?
p9556, the SI Motion STOP A delay time, and p9560, the SI Motion STO shutdown velocity used here as the speed threshold. C01700 “STOP A initiated” is output when the p9556 time expires or the speed undershoots p9560.
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