Lenze 9228E - Manual (Page 58)

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4.2. Homing mode
•
C250 Homing mode
In the homing mode (C250 = -0-) the increments of the master
frequency at the DIG.SET input are processed as a relative
change of angle. By activating the homing mode (C250 = -1-) it
is possible to refer to an absolute angle position of the motor
shaft. The homing mode can only be activated if the controller is
inhibitied. It is initiated by means of JOG function.
Functional sequence:
Start the homing mode by means of the JOG function enable.
The RDY signal indicates "not ready". The drive runs at the
selected JOG speed. After blocking the JOG signal (e.g. by
means of a proximity switch), the drive continues to run to the
home position and stops. The RDY signal indicates "ready".
If controller inhibit or QSP are activated during homing, the RDY
signal remains "not ready" until the homing process is finished.
0
360
o
o
Input signal JOG
0
JOG speed
Home position
any position
t
Motor speed
Motor shaft
position
Output signal RDY
•
C252 Angle offset
The shift range of the home position is one revolution of the
motor shaft. 360° is resolved into 2048 steps. The adjustment
can be made ON-LINE when the motor is running. The zero
pulse of the encoder emulation X4 is also resolved in 256 steps.
•
C254 Amplification of the angle controller
The angular controller is active when using a master frequency
DIG.SET input or if the homing mode is active. By selecting
Vpw=0, the angular controller is deactivated. In this case, the
master frequeny is processed as speed set value and not as set
angle increments. Before adjusting the amplification of the
angular controller, the speed controller must be optimized.
•
C159 Homing OK
C159 displays whether the homing was successful or not:
C159 = -1-
homing successfully completed
C159 = -0- homing not completed
C159 may also be used for simulating a homing mode:
Set C159 = -1- and manually activate the angle offset under
C252.