What it means
N30621 is the message SI P2: Safe Stop 1 active, which the drive outputs without any reaction. It reports that the Safe Stop 1 function (SS1) was selected in monitoring channel 2 and is active. This is a status notification rather than a malfunction: the manual points out that the message does not result in a safety stop response. SS1 is a Safety Integrated (SI) function and corresponds to Stop Category 1 acc. to EN60204. Depending on how the drive is configured, the same condition can also be issued as a fault (F) or an alarm (A).
Why it appears
- The Safe Stop 1 function (SS1) was selected in monitoring channel 2 and is active.
What to check
- No action is necessary — the manual states the remedy as 'Not necessary.' The message only reports that SS1 is active in monitoring channel 2, so there is nothing to inspect or correct.
Acknowledging and restarting
No acknowledgement is required. The manual names no remedy and the message does not trigger a safety stop response, so there is nothing to reset — the entry is purely informational while SS1 is active.
The same on every family
Every manual that describes N30621 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Safety monitoring channel has identified an error (10) | Power Module | SINAMICS S120, S150 List Manual · p. 2976 |
| G130, G150 | NONE | NONE | Safety monitoring channel has identified an error (10) | Power Module | SINAMICS G130, G150 List Manual · p. 1678 |
The drives this code lives on
N30621 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 N30621 SI P2: Safe Stop 1 active mean on a SINAMICS drive?
It reports that the Safe Stop 1 function (SS1) was selected in monitoring channel 2 and is currently active. The message does not result in a safety stop response.
Do I need to acknowledge or reset N30621?
No. The drive outputs the message without a reaction and the manual states that a remedy is not necessary, so no acknowledgement or reset is needed.
Is N30621 a fault or an alarm?
As N30621 it is a message without a reaction. The same condition can also be issued as a fault (F) or an alarm (A), depending on the drive's configuration.
What is SS1 on a SINAMICS drive?
SS1 stands for Safe Stop 1, a Safety Integrated function that corresponds to Stop Category 1 acc. to EN60204. This message simply signals that SS1 is active in monitoring channel 2.
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 N30xxx group · SINAMICS manuals · Siemens manuals