Operating instructions

136 Application manual Positioning 04/08
14
14
14
A
B
C
v f
v f
v c
v c
v c
Neg. HW Limit Switch
Home switch
Encoder
reference signal
A: Homing direction (search direction) is anticlockwise toward negative HW limit
switch if home switch and limit switch are inactive. The home switch is in search
direction. Travel to rising (right) edge of home switch is performed at
Fast Speed
1132. Home position is the first encoder ref. signal after the home switch is passed.
Search for the home position is performed at
Creep Speed 1133.
B: When homing is started, the home switch is active. Homing direction (search
direction) is anticlockwise toward negative HW limit switch. Home position is the first
encoder ref. signal after the home switch is passed in negative direction. Homing is
performed at
Creep Speed 1133.
C: Homing direction (search direction) is anticlockwise toward negative HW limit
switch. The home switch is not in search direction. The negative limit switch acts as
a reversing switch. When the negative limit switch is reached, the direction of rota-
tion is reversed, and homing is performed in positive direction. When the home
switch is reached, the direction of rotation is reversed again. At first, the operation is
performed at
Fast Speed 1132, when the left edge of the home switch is reached,
the speed is changed to
Creep Speed 1133. Home position is the first ref. signal in
negative direction after the falling edge of the home switch signal.
Application manual Positioning 04/08136