Direction Reversal - Siemens SINAMICS S150 Operating Instructions Manual

9.3.11

Direction reversal

Description
The direction of rotation of the motor can be reversed using direction reversal via p1821
without having to change the motor rotating field by interchanging two phases on the motor
and inverting the encoder signals using p0410.
Reversal via p1821 can be detected from the motor direction of rotation. The speed setpoint
and actual value, torque setpoint and actual value remain unchanged, as does the relative
position change.
A pulse inhibit must be set prior to attempting reversal.
Reversing can be set differently for each drive data set.
Note
When changing over the drive data set to differently set reversing and with pulse approval,
fault F7434 is issued.
Reversing can be observed by checking parameters r0069 (phase currents) and r0089
(phase voltage). The absolute position reference is lost on reversal.
Function diagram
FD 4704, 4715
FD 6730, 6731
Parameters
• r0069
• r0089
• p1820
• p1821
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
Encoder evaluation
Current control
Phase currents actual value
Phase voltage actual value
Output phase direction reversal
Direction reversal
Functions, monitoring, and protective functions
9.3 Drive functions
333