Operating instructions

04/08 Application manual Positioning 149
Operation mode 30: Homing to left falling edge of home switch without
encoder ref. signal with negative hardware limit switch
Dest.: Falling left edge of home switch
A Home switch active 0
Search direction Negative direction
Speed (before speed change)
Fast Speed 1132
Condition
speed change
Rising edge
home switch
Speed (after speed change)
Creep Speed 1133
B Home switch active 1
Search direction Negative direction
Speed
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
30
30
30
Neg. HW Limit Switch
A
B
C
v f
v f
v c
v c
v c
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 left of the left edge of the home switch. Travel to rising
(right) edge of home switch is performed at
Fast Speed 1132. 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 left of
the left edge of the home switch. Search for the home position 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. Home position is left of
the left edge of the home switch. Travel to rising (left) edge of home switch is per-
formed at
Fast Speed 1132. Search for the home position is performed at Creep
Speed
1133.
Application manual Positioning 14904/08