Operating instructions

142 Application manual Positioning 04/08
Operation mode 23: Homing to left falling edge of home switch without
encoder ref. signal with positive hardware limit switch
Dest.: Falling left edge of home switch
A Home switch active 0
Search direction Positive direction
Speed (before 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
B Home switch active 1
Search direction Negative direction
Speed
Creep Speed 1133
C Home switch active 0
Search direction Positive direction
Speed (before reversal of direction of rotation)
Fast Speed 1132
Condition
reversal of direction of rotation
Rising edge
positive HW limit switch
Speed (after reversal of direction of rotation)
Fast Speed 1132
Condition
speed change
Rising edge
home switch
Speed (after speed change)
Creep Speed 1133
Home Switch
23
23
23
Pos. HW Limit Switch
A
B
C
v f
v f
v c
v c
v c
v f
A: Homing direction (search direction) is clockwise toward positive HW limit switch if
home switch and limit switch are inactive. The home switch is in search direction.
Travel to rising edge of home switch is performed at
Fast Speed 1132. When the
home switch is reached, the direction of rotation is reversed. Home position is the
falling edge of the home switch. 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
falling edge of the home switch. Search for the home position is performed at
Creep
Speed
1133.
C: Homing direction (search direction) is clockwise toward positive HW limit switch.
The home switch is not in search direction. The positive limit switch acts as a revers-
ing switch. When the positive limit switch is reached, the direction of rotation is re-
versed, and homing is performed in negative direction. Travel to rising (right) edge
of home switch signal is performed at
Fast Speed 1132. Home position is the falling
edge of the home switch. Search for the home position is performed at
Creep
Speed
1133.
Application manual Positioning 04/08142