What it means
The Power Module has measured a voltage above the permitted upper threshold on its own power supply. On drive objects SERVO, SERVO_AC and SERVO_I_AC the manual titles the code Power unit: Overvolt 24/48 V
— either the 24 V or the 48 V power supply has tripped, and the fault value names which. On the remaining drive objects the code is titled Power unit: Overvolt 24 V
and only the 24 V power supply is involved. In both cases the drive executes an OFF2, i.e. it coasts down, and the fault is only acknowledged after POWER ON — the drive's power supply has to be switched off and back on.
Why it appears
- For the power unit power supply, the upper threshold has been violated — the supply feeding the Power Module is above its permitted maximum.
What to check
- Read the fault value in r0949. On SERVO, SERVO_AC and SERVO_I_AC the channel byte yy = 0 identifies the 24 V power supply and yy = 1 the 48 V power supply, so you know which supply to look at; on the other drive objects the value is the 24 V voltage itself.
- Check the power supply of the power unit.
Reading the message value
- SERVO, SERVO_AC, SERVO_I_AC: the message value reads
Channel: %1, voltage: %2 [0.1 V]
. The fault value in r0949 is interpreted in hexadecimal as yyxxxx hex, where yy is the channel and xxxx the voltage in [0.1 V]. yy = 0: 24 V power supply, yy = 1: 48 V power supply. - A_INF, B_INF, R_INF, S_INF, VECTOR, VECTOR_AC, VECTOR_I_AC and VECTOR_G: the fault value in r0949 is interpreted in decimal and gives the 24 V voltage in [0.1 V]; the message value carries this voltage as a single placeholder (%1).
Parameters the manual names
- r0949 (fault value) — read the code's value here: decode it in hexadecimal for SERVO, SERVO_AC and SERVO_I_AC (channel yy, voltage xxxx in [0.1 V]), or in decimal for the other drive objects (24 V voltage in [0.1 V]).
Acknowledging and restarting
This fault requires POWER ON to be acknowledged: after the power unit power supply has been checked and the overvoltage remedied, switch the drive's power supply off and back on. Acknowledging without cycling the power supply does not clear the fault; once it has gone, the drive can be started again.
The same on every family
Every manual that describes F30043 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 | POWER ON | Supply voltage fault (overvoltage) (3) | Power Module | SINAMICS S120, S150 List Manual · p. 2955 |
| S120, S150 | OFF2 | POWER ON | Supply voltage fault (overvoltage) (3) | Power Module | SINAMICS S120, S150 List Manual · p. 2955 |
| G130, G150 | OFF2 | POWER ON | Supply voltage fault (overvoltage) (3) | Power Module | SINAMICS G130, G150 List Manual · p. 1664 |
The drives this code lives on
F30043 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 F30043 mean on a SINAMICS power unit?
That the upper threshold of the power unit's own power supply has been violated: an overvoltage on the 24 V supply, and on SERVO-type drive objects possibly on the 48 V supply. The drive reacts with OFF2 and coasts down.
How do I clear fault F30043?
Check the power supply of the power unit first, then acknowledge with POWER ON — switch the drive's power supply off and back on. The fault cannot be acknowledged without cycling the power supply.
How do I see whether the 24 V or the 48 V supply tripped?
On drive objects SERVO, SERVO_AC and SERVO_I_AC, read the fault value in r0949 in hexadecimal: yy = 0 means the 24 V power supply and yy = 1 the 48 V power supply, while xxxx gives the voltage in [0.1 V].
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 F30xxx group · SINAMICS manuals · Siemens manuals