What it means
A35929 is signalled by a Terminal Module (TM) when the evaluation of the temperature sensor connected to its channel 9 produces a signal outside the permissible range for the connected sensor type. Depending on the drive configuration, the same condition can also be output as a fault or as a message without any reaction.
Why it appears
- An error occurred while the Terminal Module was evaluating the temperature sensor on channel 9.
- The sensor is not connected, or the sensor cable has a wire breakage (alarm value 1).
- The measured resistance is too low for the sensor type connected (alarm value 2).
What to check
- Read the alarm value in r2124 (interpret it as a decimal number) to see whether the drive reports wire breakage / sensor not connected (1) or a resistance that is too low (2).
- Make sure that the temperature sensor is connected correctly.
- Replace the sensor.
Reading the message value
- The message value is the alarm value, which the drive writes to r2124; the manual says to interpret it decimal.
- 1 — wire breakage or sensor not connected: KTY84: R > 2170 Ohm, PT100: R > 194 Ohm, PT1000: R > 1944 Ohm.
- 2 — measured resistance too low: PTC thermistor: R < 20 Ohm, KTY84: R < 180 Ohm, PT100: R < 60 Ohm, PT1000: R < 603 Ohm.
Parameters the manual names
- r2124 — alarm value: read this parameter as a decimal number to determine whether the alarm on channel 9 reports a wire breakage or an unconnected sensor (value 1) or a measured resistance that is too low (value 2).
Acknowledging and restarting
As an alarm, the message needs no acknowledgement; remedy the sensor connection or replace the sensor. If the drive is configured to output the same condition as a fault, it is acknowledged immediately by a POWER ON: Acknowl. upon F: IMMEDIATELY (POWER ON)
.
The same on every family
Every manual that describes A35929 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | External measured value / signal state outside the permissible range (16) | Terminal Module (TM) | SINAMICS S120, S150 List Manual · p. 3247 |
| G130, G150 | NONE | NONE | External measured value / signal state outside the permissible range (16) | Terminal Module (TM) | SINAMICS G130, G150 List Manual · p. 1909 |
The drives this code lives on
A35929 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 alarm A35929 mean on a SINAMICS drive?
It is a Terminal Module message: the evaluation of the temperature sensor on channel 9 found the measured signal outside the permissible range — either a wire breakage or an unconnected sensor, or a resistance that is too low.
How do I find out why A35929 was raised?
Read the alarm value in parameter r2124 as a decimal number. Value 1 means wire breakage or sensor not connected, value 2 means the measured resistance is too low.
Which resistance thresholds belong to A35929?
For value 1: KTY84 above 2170 Ohm, PT100 above 194 Ohm, PT1000 above 1944 Ohm. For value 2: PTC thermistor below 20 Ohm, KTY84 below 180 Ohm, PT100 below 60 Ohm, PT1000 below 603 Ohm.
Does A35929 have to be acknowledged?
No — as an alarm it requires no acknowledgement. If the drive is configured to output the condition as a fault, it is acknowledged immediately by a POWER ON.
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 A35xxx group · SINAMICS manuals · Siemens manuals