What it means
A35924 is reported by a Terminal Module (TM). It means that an error occurred while the module was evaluating the temperature sensor wired to its channel 4; the message text is TM: Error temperature sensor channel 4
. The alarm value stored in r2124 tells which condition the module has recognised. Depending on the drive configuration, the same condition can also be output as a fault or as a message without a reaction. Neither variant causes the drive to trip — the message only reports the sensor problem.
Why it appears
- An error occurred when the Terminal Module evaluated the temperature sensor connected to channel 4.
- Alarm value 1: wire breakage or no sensor connected — the measured resistance lies above the upper limit for the connected sensor type (KTY84, PT100 or PT1000).
- Alarm value 2: the measured resistance lies below the lower limit for the connected sensor type (PTC thermistor, KTY84, PT100 or PT1000).
What to check
- Make sure that the temperature sensor is connected correctly to the Terminal Module.
- If the connection is correct, replace the sensor.
Reading the message value
- The drive stores the alarm value in r2124; interpret it as a decimal number.
- 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 it as a decimal number to see whether the sensor is interrupted or not connected (1) or the measured resistance is too low (2).
Acknowledging and restarting
As an alarm, the message requires no acknowledgement. If the drive is configured to issue the same condition as a fault, the manual gives the acknowledgement as IMMEDIATELY (POWER ON)
. In both cases first remove the cause — reconnect the sensor correctly or replace it — so that the measured resistance is back within the limits for the connected sensor type.
The same on every family
Every manual that describes A35924 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. 3245 |
| G130, G150 | NONE | NONE | External measured value / signal state outside the permissible range (16) | Terminal Module (TM) | SINAMICS G130, G150 List Manual · p. 1907 |
The drives this code lives on
A35924 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 A35924 on a SINAMICS drive mean?
A Terminal Module has detected an error while evaluating the temperature sensor on channel 4. The alarm value in r2124 distinguishes a wire breakage or missing sensor (1) from a measured resistance that is too low (2).
How do I clear alarm A35924?
Check that the sensor is connected correctly and, if the connection is fine, replace the sensor. As an alarm the message needs no acknowledgement; a fault version acknowledges IMMEDIATELY (POWER ON).
Which sensor types does A35924 monitor?
KTY84, PT100, PT1000 and PTC thermistors, each with its own resistance limits — for example wire breakage is detected above 2170 Ohm for KTY84, above 194 Ohm for PT100 and above 1944 Ohm for PT1000.
Does A35924 stop the drive?
No. Neither the alarm nor the fault variant triggers a drive reaction; the message only reports the sensor problem on channel 4 of the Terminal Module.
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