Operating instructions

04/08 Application manual Positioning 147
Operation mode 28: Homing to right rising edge of home switch without
encoder ref. signal with negative hardware limit switch
Dest.: Rising right edge of home switch
A Home switch active 0
Search direction Negative direction
Speed
Fast Speed 1132
B Home switch active 1
Search direction Positive direction
Speed (before reversal of direction of rotation)
Fast Speed 1132
Condition
reversal of direction of rotation
Falling edge
home switch
Speed (after reversal of direction of rotation)
Creep Speed 1133
C Home switch active 0
Search direction Negative direction
Speed (before reversal of direction of rotation)
Fast Speed 1132
Condition
reversal of direction of rotation
Rising edge
negative HW limit
switch
Speed (after reversal of direction of rotation)
Fast Speed 1132
Condition
reversal of direction of rotation
Rising edge
home switch
Speed (after reversal of direction of rotation)
Creep Speed 1133
Home Switch
28
28
28
Neg. HW Limit Switch
A
B
C
v f
v f
v c
v c
v f
v f
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. Home position is the rising edge of the home switch. Homing is performed
at
Fast Speed 1132.
B: When homing is started, the home switch is active. Homing direction (search
direction) is clockwise toward positive HW limit switch. Travel to falling edge of ho-
me switch signal is performed at
Fast Speed 1132. When the home switch is passed
in positive direction, the direction of rotation is reversed. Home position is the rising
edge of the home switch. 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 passed, 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 rising edge of the
home switch.
Application manual Positioning 14704/08