What it means
A07427 («Motor switch-in alarm») is a G120XA alarm that reports one of two conditions — one concerning the technology controller, one concerning the operating time limits of the external motors. Which condition applies is read from the alarm value in r2124, interpreted as a decimal number.
Why it appears
- The technology controller is not enabled, or it is enabled but not used to control the main setpoint — the mode is set in p2251.
- An external motor — at least one of them — has run beyond its operating time limits.
What to check
- Read the alarm value in r2124 (interpret it as a decimal number) to find out which of the two conditions raised the alarm.
- For alarm value 1: enable the technology controller via p2200, or set the technology controller mode p2251 = 0 (main setpoint).
- For alarm value 2: increase p2381 or p2382, or set p2380 = 0.
Reading the message value
- The drive stores the alarm value in r2124; interpret it as a decimal number.
- 1: The technology controller is not active or is not being used to control the main setpoint (see p2251).
- 2: The operating time limits have been exceeded in at least one external motor.
Parameters the manual names
- r2124 — alarm value: shows as a decimal number which of the two conditions the alarm is reporting.
- p2200 — BI: technology controller enable: the enable that activates the technology controller; the remedy for alarm value 1.
- p2251 — technology controller mode: set it to 0 (main setpoint) so the technology controller controls the main setpoint; the remedy for alarm value 1.
- p2381 — closed-loop cascade control max time for continuous operation: one of the time limits to increase for alarm value 2.
- p2382 — closed-loop cascade control operating time limit: the other time limit to increase for alarm value 2.
- p2380 — closed-loop cascade control operating hours: write 0 to it as the remedy for alarm value 2.
Acknowledging and restarting
No acknowledgement is required for this alarm. Clearing it means removing the cause itself: for alarm value 1, enable the technology controller (p2200) or set p2251 = 0 (main setpoint); for alarm value 2, increase p2381 or p2382, or set p2380 = 0.
The same on every family
Every manual that describes A07427 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G120XA | NONE | NONE | — | — | SINAMICS G120XA PN converter · p. 1130 |
Questions technicians ask
What does alarm A07427 Motor switch-in alarm mean on a SINAMICS G120XA?
It reports one of two conditions, distinguished by the alarm value in r2124: 1 — the technology controller is not active or is not being used to control the main setpoint; 2 — the operating time limits have been exceeded in at least one external motor.
How do I fix A07427 with alarm value 1?
Enable the technology controller via p2200, or set the technology controller mode p2251 = 0 (main setpoint).
What clears A07427 alarm value 2?
Increase the time limits p2381 or p2382, or set p2380 (closed-loop cascade control operating hours) = 0.
Does A07427 have to be acknowledged?
No. The alarm requires no acknowledgement; removing the cause is the corrective action.
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 A07xxx group · SINAMICS manuals · Siemens manuals