What it means
F32125 is raised when the signal level — the root from A² + B² — that Encoder 2 delivers exceeds the permissible limit. The S120/S150 manual titles the condition “Encoder 2: Signal level track A or B too high”, the G130/G150 manual “Encoder 2: Amplitude error track A or B overcontrolled”, and the latter wording adds that the fault also occurs if the analog/digital converter is overcontrolled. The drive reacts with OFF1. For incremental encoders the nominal signal level must lie between 375 mV and 600 mV (500 mV −25/+20 %); the response threshold is > 750 mV. For Sensor Modules for resolvers such as the SMC10 the nominal signal level is 2900 mV (2.0 Vrms) and the response threshold is > 3582 mV. Depending on the drive configuration, the same condition can also be issued as an alarm or as a message without reaction. The analog values of the amplitude error are not measured at the same time with the hardware fault output by the Sensor Module.
Why it appears
- The signal level (root from A² + B²) of Encoder 2 exceeds the permissible limit value — in the G130/G150 wording, the amplitude of track A or B leaves the permissible tolerance band.
- The fault also occurs if the analog/digital converter is overcontrolled.
What to check
- Check that the encoder cables and the shielding are routed in compliance with EMC.
- Replace the encoder or the encoder cable.
Reading the message value
The drive packs both track levels into the fault value in r0949, which must be interpreted as hexadecimal yyyyxxxx:
- yyyy = Signal level, track B (16 bits with sign)
- xxxx = Signal level, track A (16 bits with sign)
Reference values from the manual: a signal level of 500 mV peak value corresponds to the numerical value 5333 hex = 21299 dec; for resolver Sensor Modules such as the SMC10, a signal level of 2900 mV peak value corresponds to the numerical value 6666 hex = 26214 dec. The message value is shown as “A track: %1, B-track: %2”, so the two placeholders carry the track A and track B levels.
Parameters the manual names
- r0949 — fault value; read it as hexadecimal yyyyxxxx here to see the signal level of track A (xxxx) and of track B (yyyy) for this fault.
Acknowledging and restarting
Remove the cause first, then acknowledge F32125 once the drive is pulse-inhibited — the fault belongs to the PULSE INHIBIT acknowledge class — after which the drive can be restarted. When the configuration issues the condition only as an alarm or as a message without reaction, the entries specify no acknowledgement.
What differs between the drive families
Straight from the manuals' own fields — F32125 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Servo: OFF1 (IASC/DCBRK, NONE, OFF2, OFF3, STOP2) Vector: OFF1 (IASC/DCBRK, NONE, OFF2, OFF3, STOP2) Hla: OFF1 (NONE, OFF2, OFF3, STOP2) | PULSE INHIBIT | Actual position/speed value incorrect or not available (11) | Encoder 2 | SINAMICS S120, S150 List Manual · p. 3090 |
| G130, G150 | OFF1 (IASC/DCBRK, NONE, OFF2, OFF3, STOP2) | PULSE INHIBIT | Actual position/speed value incorrect or not available (11) | Encoder 2 | SINAMICS G130, G150 List Manual · p. 1771 |
The drives this code lives on
F32125 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 fault F32125 mean in SINAMICS drives?
The signal level (root from A² + B²) of Encoder 2 exceeds the permissible limit — above 750 mV for an incremental encoder or above 3582 mV for a resolver Sensor Module such as the SMC10. The drive reacts with OFF1.
How do I read the F32125 fault value in r0949?
Interpret it as hexadecimal yyyyxxxx: xxxx is the signal level of track A and yyyy that of track B, each 16 bits with sign. For example, 5333 hex = 21299 dec corresponds to a 500 mV peak level.
What should I check when F32125 appears?
Check that the encoder cables and the shielding are routed in compliance with EMC. If the fault persists, replace the encoder or the encoder cable.
How is F32125 acknowledged?
Acknowledge the fault once the drive is pulse-inhibited, after removing the cause. Issued as an alarm or as a message without reaction, the entries specify no 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 F32xxx group · SINAMICS manuals · Siemens manuals