What it means
F05050 is raised in configurations where power units operate in a parallel circuit. One of these power units signals that its pulses are enabled although the pulses are inhibited. The fault value stored with the message identifies which power unit sent this signal, and the manual's conclusion is that the power unit concerned is defective.
Why it appears
- One of the power units connected in the parallel circuit reports that its pulses are enabled even though the pulses are inhibited.
What to check
- Read the fault value in r0949 as a decimal number — it is the number of the power unit involved, so you know which unit raised the signal.
- Replace that power unit: the manual states the power unit is defective and must be replaced, and no other remedy is described.
Reading the message value
- The drive stores the fault value in r0949; interpret it as a decimal number.
- The decimal number is the number of the power unit involved — the unit that reported pulses enabled during pulse inhibit.
Parameters the manual names
- r0949 — read it as a decimal number to identify the number of the power unit involved in this fault.
Acknowledging and restarting
The fault must be acknowledged IMMEDIATELY. Because the reaction withdraws the pulses with OFF2, the drive coasts down and must be acknowledged before it will start again. After the defective power unit has been replaced, acknowledge the fault and restart the drive.
What differs between the drive families
Straight from the manuals' own fields — F05050 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: OFF2 (NONE, OFF1) Vector: OFF2 (NONE, OFF1, OFF3, STOP2) | IMMEDIATELY | Application/technological function faulted (17) | Power Module | SINAMICS S120, S150 List Manual · p. 2748 |
| G130, G150 | Vector: OFF2 (NONE, OFF1, OFF3, STOP2) Infeed: OFF2 (NONE, OFF1) | IMMEDIATELY | Application/technological function faulted (17) | Power Module | SINAMICS G130, G150 List Manual · p. 1521 |
The drives this code lives on
F05050 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 F05050 mean on a SINAMICS drive?
In a parallel circuit, a power unit has signaled that its pulses are enabled although the pulses are inhibited. The manual concludes that the power unit is defective.
How do I find out which power unit triggered F05050?
Read the fault value in r0949 and interpret it as a decimal number. That number is the number of the power unit involved.
How do I clear fault F05050?
The power unit involved is defective and must be replaced. After replacement, acknowledge the fault — immediately — and restart the drive.
What happens to the drive when F05050 occurs?
The pulses are withdrawn with OFF2, so the drive coasts down. The fault must be acknowledged before the drive can be started again.
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 F05xxx group · SINAMICS manuals · Siemens manuals