Lenze PM94P01C - Manual (Page 81)

PM94P01C 79
Programming
2.15.9.21 Homing Method 27: Homing without an Index Pulse
Using this method the initial direction of movement is negative. The home position is the negative edge of the homing
switch.
Axis will accelerate to fast homing velocity in the negative direction and continue until Homing Switch (selectable via
Var_Home_Switch_Input Variable) is deactivated (falling edge) shown at position A. Axis then decelerates to zero
velocity.
If the homing switch is already active when the homing routine commences then this does not effect this mode of
homing as the procedure is searching for falling edge of homing switch in both cases.
Axis will then accelerate to slow homing velocity in the positive direction. Motion will continue until the rising edge of the
homing switch is detected (position B), where the axis will decelerate to 0 velocity.
Axis will then accelerate to slow homing velocity in the negative direction. Motion will continue until the falling edge of
the homing switch is detected (position 27). This is the home position (excluding offset).
NOTE: if the axis is on the wrong side of the homing switch when homing is started then the axis will move negative until
it contacts the negative limit switch (A1). Upon activating the negative limit switch the axis will change direction (positive)
continuing motion until it sees the rising edge of the homing switch. The axis will then stop and follow the procedure as
detailed above.
A
B
27
27
A
B
Homing Switch
(Var_Home_Switch_Input)
Figure 45: Homing Method 27