Functions, monitoring, and protective functions
9.3 Drive functions
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
333
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 Encoder evaluation
FD 6730, 6731 Current control
Parameters
•
r0069
Phase currents actual value
•
r0089
Phase voltage actual value
•
p1820
Output phase direction reversal
•
p1821
Direction reversal
