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Fault · SINAMICS S120, S150

F07755Drive: travel to fixed end stop without force controller

What it means

F07755 is raised when the function "Travel to fixed end stop" (p1545) is selected although neither a "Force controller" nor "Force limiting" has been activated in p1400. The manual states the reason plainly: With these settings, the drive would be traversed with maximum force against the end stop. The condition therefore flags an end-stop approach that would run without any force monitoring. Depending on the drive's configuration, the same condition can also be output only as an alarm or without any reaction.

Why it appears

  • The function "Travel to fixed end stop" has been selected via p1545.
  • Neither the force controller nor force limiting has been activated in p1400 at the same time.
  • With this combination the drive would be traversed with maximum force against the end stop.

What to check

  1. If the function is not required, deactivate "Travel to end stop" via p1545.
  2. Alternatively, activate the force controller by setting p1400.14 = 1.
  3. Or activate force limiting, mode 1 or mode 2, by setting p1400.0 = 1, p1400.1 = 1.

Parameters the manual names

  • p1545 — "BI: Activates travel to a fixed stop / TfS activation": this is where the travel to fixed end stop function is selected; return it to the deactivated state here if the function should not be used.
  • p1400 — "Closed-loop control configuration / Ctrl config": the force controller (p1400.14) and force limiting, mode 1 or mode 2 (p1400.0, p1400.1), must be switched on here before the end-stop function is selected.

Acknowledging and restarting

Once the setting has been corrected as described above, acknowledge the fault and start the drive again; the acknowledgment is due immediately. In the variants in which the condition appears only as an alarm or as a message without reaction, the manual specifies no acknowledgment.

The same on every family

Every manual that describes F07755 gives it the same reaction, acknowledgement and message class.

Drive familyReactionAcknowledgeMessage classComponentManual
S120, S150OFF3 (NONE, OFF1, OFF2)IMMEDIATELYApplication/technological function faulted (17)MotorSINAMICS S120, S150 List Manual · p. 2861

The drives this code lives on

F07755 is described for S120, S150. These are the converters of those families in our catalogue — price on request.

Questions technicians ask

What does fault F07755 mean on a SINAMICS S120 or S150?

The function "Travel to fixed end stop" (p1545) is selected although neither the force controller nor force limiting is activated in p1400. The drive would therefore traverse with maximum force against the end stop.

How do I clear F07755?

Deactivate the travel to end stop function via p1545, or activate the force controller (p1400.14 = 1), or activate force limiting mode 1 or mode 2 (p1400.0 = 1, p1400.1 = 1). Then acknowledge the fault and restart the drive.

Why does the drive refuse travel to a fixed end stop in F07755?

Because without an activated force controller or force limiting, the drive would press against the mechanical end stop with maximum force, so the drive stops this combination with the fault.

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 F07xxx group · SINAMICS manuals · Siemens manuals