Operating instructions

128 Application manual Positioning 04/08
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.
Home position is the first encoder ref. signal after the home switch is reached. Dur-
ing the whole operation, homing is performed at
Fast Speed 1132.
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 is performed at
Fast Speed 1132. When the home switch is passed in
negative direction, the direction of rotation is reversed. Home position is the next
encoder ref. signal. 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 falling edge of
home switch is performed at
Fast Speed 1132. When the home switch is passed,
the direction of rotation is reversed again. Home position is the first encoder ref.
signal after the status change of the home switch signal when traveling in positive
direction. Search for the home position is performed at
Creep Speed 1133.
Operation mode
9: 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 right 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
Falling edge
home switch
Speed (after reversal of direction of rotation)
Creep Speed 1133
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 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
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