Operating instructions

04/08 Application manual Positioning 121
5.5.1 Homing Modes with Ref. Signal
Operation mode 1: Homing to negative limit switch with detection of en-
coder ref. signal
Dest.: Ref. signal to the right of negative limit switch
Home switch not used
Search direction Negative direction
Speed (before reversal of direction of rotation)
Fast Speed 1132
Condition
reversal of direction of rotation
Rising edge
negative limit switch
Speed (after reversal of direction of rotation)
Creep Speed 1133
Encoder
reference signal
Home position
Neg. HW Limit Switch
vf
vc
1
The homing direction (search direction) is negative at
Fast Speed 1132. When the
limit switch is reached, the direction of rotation is reversed and homing is performed
at
Creep Speed 1133.
The home position is the first encoder ref. signal after the falling edge of the limit
switch when traveling in positive direction (clockwise).
Operation mode
2: Homing to positive limit switch with detection of en-
coder ref. signal
Dest.: Ref. signal to the left of positive limit switch
Home switch not used
Search direction Positive direction
Speed (before reversal of direction of rotation)
Fast Speed 1132
Condition
reversal of direction of rotation
Rising edge
positive limit switch
Speed (after reversal of direction of rotation)
Creep Speed 1133
Home position
Pos. HW Limit Switch
v f
v c
2
Encoder
reference signal
The homing direction (search direction) is positive at
Fast Speed 1132. When the
limit switch is reached, the direction of rotation is reversed and homing is performed
at
Creep Speed 1133.
The home position is the first encoder ref. signal after the falling edge of the limit
switch when traveling in negative direction (anticlockwise).
Application manual Positioning 12104/08