What it means
A36999 — Hub: Unknown alarm. The drive raises this message when an alarm occurs on the DRIVE-CLiQ Hub Module that the firmware on the Control Unit cannot interpret. The manuals name the typical situation: the firmware on the Hub Module is more recent than the firmware on the Control Unit, so the Control Unit does not know this newer alarm. Depending on how the drive is configured, the same condition can also be issued as a fault or without any reaction.
Why it appears
- The DRIVE-CLiQ Hub Module has issued an alarm that the firmware on the Control Unit is unable to interpret.
- The manuals name one typical trigger: the Hub Module runs a more recent firmware than the Control Unit, so the Control Unit does not yet know this alarm.
What to check
- Identify the unknown message: the alarm value r2124 holds its number and is interpreted as a decimal value; the message value itself appears as "New message: %1".
- Compare the firmware versions: r0158 (Voltage Sensing Module firmware version, VSM FW version) shows the firmware level on the DRIVE-CLiQ Hub Module, r0018 (Control Unit firmware version, CU FW version) shows the level on the Control Unit. A Hub Module with newer firmware than the Control Unit matches the described cause.
- Carry out one of the two remedies the manuals give: replace the firmware on the DRIVE-CLiQ Hub Module with older firmware (r0158), or upgrade the firmware on the Control Unit (r0018).
If required, the significance of this new alarm can be read about in a more recent description of the Control Unit.
Reading the message value
- The message value is shown as "New message: %1"; the placeholder carries the number of the new alarm that the Control Unit firmware cannot interpret.
- Alarm value (r2124, interpret decimal): alarm number — the value in r2124 is the number of the alarm and is read as a decimal number.
Parameters the manual names
- r2124 (alarm value) — holds the number of the uninterpreted Hub Module alarm for this code; read it as a decimal number.
- r0158 (Voltage Sensing Module firmware version, VSM FW version) — shows the firmware version on the DRIVE-CLiQ Hub Module; check it before replacing the firmware there with an older version.
- r0018 (Control Unit firmware version, CU FW version) — shows the firmware version of the Control Unit; check it before upgrading the Control Unit firmware.
Acknowledging and restarting
Where the drive issues the condition as a fault, it is acknowledged immediately, and the manuals specify POWER ON as the acknowledgement. Where it is issued without any reaction, no acknowledgement applies. Acknowledging does not change the firmware situation — bring the firmware on the DRIVE-CLiQ Hub Module and on the Control Unit to a level at which the Control Unit can interpret the Hub Module alarms, as described above.
What differs between the drive families
Straight from the manuals' own fields — A36999 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | — | — | General drive fault (19) | Terminal Board (TB) | SINAMICS S120, S150 List Manual · p. 3259 |
| G130, G150 | NONE | NONE | General drive fault (19) | Terminal Board (TB) | SINAMICS G130, G150 List Manual · p. 1921 |
The drives this code lives on
A36999 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 alarm A36999 mean?
The DRIVE-CLiQ Hub Module has sent an alarm that the firmware on the Control Unit cannot interpret, typically because the Hub Module firmware is more recent than the Control Unit firmware.
How can I see which alarm is hiding behind A36999?
Read r2124 and interpret the value as a decimal alarm number. The drive also shows the new message in the message value, and its significance can be looked up in a more recent description of the Control Unit if required.
How do I clear A36999?
Either replace the firmware on the DRIVE-CLiQ Hub Module with older firmware (r0158) or upgrade the firmware on the Control Unit (r0018). Acknowledging the message alone does not remove the firmware mismatch.
Can A36999 also appear as a fault?
Yes — depending on the drive configuration the same condition can also be issued as a fault or without any reaction. As a fault it is acknowledged immediately, with POWER ON given as the acknowledgement.
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 A36xxx group · SINAMICS manuals · Siemens manuals