Operating instructions

148 Application manual Positioning 04/08
Operation mode 29: Homing to left rising edge of home switch without
encoder ref. signal with negative hardware limit switch
Dest.: Rising left edge of home switch
A Home switch active 0
Search direction Negative 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
B Home switch active 1
Search direction Negative 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
Home Switch
29
29
29
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. Travel to falling edge of home switch is performed at
Fast Speed 1132.
When the home switch is passed, the direction of rotation is reversed. Home position
is right of the left edge of the home switch. Search for the home position is per-
formed 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. Travel to falling edge of
home switch signal is performed at
Fast Speed 1132. When the home switch is
passed in negative direction, the direction of rotation is reversed. Home position is
right 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. Home position is
right of the left edge of the home switch. During the whole operation, homing is
performed at
Fast Speed 1132.
Application manual Positioning 04/08148