Operating instructions

126 Application manual Positioning 04/08
Operation mode 7: Homing to home switch with detection of encoder ref.
signal, homing direction positive (clockwise), reversal of direction of rota-
tion when positive HW limit switch is reached
Dest.: Ref. signal to left of left edge of home switch
A Home switch inactive 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 inactive 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
7
7
7
Pos. HW Limit Switch
A
B
C
v f
v f
v c
v c
v c
Home switch
Encoder
reference signal
The homing direction (search direction) depends on the signal status of the home
switch.
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
first encoder ref. signal after the falling edge of the home switch signal. 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. Search for
the home position is performed at
Creep Speed 1133.
Application manual Positioning 04/08126