What it means
F01685 (SI Motion P1 (CU): Safely-Limited Speed limit value too high) is raised by the Safety Integrated (SI) motion monitoring when the limit value set for the Safely-Limited Speed (SLS) function is greater than the speed that corresponds to an encoder limit frequency of 500 kHz. The affected limit values belong to the Control Unit. The drive coasts down and will only restart once the limit value has been corrected and the fault has been acknowledged with a POWER ON. This fault does not result in a safety stop response.
Why it appears
- The limit value set for the function Safely-Limited Speed (SLS) is greater than the speed that corresponds to an encoder limit frequency of 500 kHz.
What to check
- Read the fault value in r0949 and interpret it as a decimal number: the drive stores the maximum permissible speed there.
- Compare the SLS limit values set in p9531 (SI Motion SLS (SG) limit values, Control Unit) against this maximum permissible speed.
- Correct the limit values for SLS so that none of them exceeds the speed corresponding to an encoder limit frequency of 500 kHz.
- Carry out a POWER ON.
Reading the message value
- The message value (%1) is a single number, not a bit pattern: the drive enters the maximum permissible speed in r0949, which is to be interpreted as a decimal number.
- The maximum permissible speed is the speed that corresponds to an encoder limit frequency of 500 kHz — every SLS limit value above it triggers F01685.
Parameters the manual names
- r0949 — fault value; for F01685 read it as a decimal number, it shows the maximum permissible speed.
- p9531 — SI Motion SLS (SG) limit values (Control Unit); the SLS limit value that is too high is corrected here.
Acknowledging and restarting
Acknowledge the fault with a POWER ON — the drive's power supply must be switched off and on again — after the limit values have been corrected. The manuals put it briefly: Correct the limit values for SLS and carry out a POWER ON.
Because this fault does not result in a safety stop response, no safety stop has to be acknowledged; the drive can then be restarted.
The same on every family
Every manual that describes F01685 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 | IMMEDIATELY (POWER ON) | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS S120, S150 List Manual · p. 2667 |
| G130, G150 | OFF2 | IMMEDIATELY (POWER ON) | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS G130, G150 List Manual · p. 1455 |
The drives this code lives on
F01685 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 F01685 on my SINAMICS mean?
The limit value set for the Safely-Limited Speed (SLS) function is greater than the speed that corresponds to an encoder limit frequency of 500 kHz. The fault value in r0949 shows the maximum permissible speed as a decimal number.
How do I clear F01685?
Correct the SLS limit values in p9531 and then carry out a POWER ON. The drive only restarts once the fault has been acknowledged this way.
Does F01685 trigger a safety stop?
No. The manuals state that this fault does not result in a safety stop response.
Where can I see the maximum permissible speed for F01685?
In r0949, interpreted as a decimal number.
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