1PosInc/Analog
4.6 Functions of the 1PosInc/Analog
ET 200S Positioning
136 Operating Instructions, 05/2007, A5E00124871-04
4.6.5 Reference Point Run (MODE 3)
Definition
You can use the reference point run to synchronize the axis on the basis of an external
reference signal. You can use either the 3 digital inputs or the zero mark as a reference
signal.
You can assign parameters to the digital inputs DI0 (minus limit switch) and DI1 (plus limit
switch) and DI2 (reducing cam) as break or make contacts.
Provide the control interface with the reference point coordinates, and start MODE 3. The
1PosInc/Analog sets the feedback signal SYNC = 0 and moves the drive with the voltage set
for rapid feed in the assigned parameter start direction and searches for the reference signal.
To do this, the 1PosInc/Analog automatically makes the necessary change in direction at the
limit switches and the reducing cam using deceleration and acceleration.
Set the necessary directional enables (DIR_M, DIR_P) to ensure that the drive is controlled.
If the 1PosInc/Analog detects the parameterized reference signal, it controls the drive at the
set voltage for creep feed mode in the assigned parameter referencing direction. This is
controlled by the reference signal and reference switch parameters.
Reference switch:
Reduction cam
towards minus
Reference switch:
Reduction cam
towards plus
Reference switch:
Minus
limit switch
Reference switch: Plus
limit switch
Reference signal:
Reference switch and
zero mark
Reference signal:
Reference switch
Minus referencing
direction
Plus referencing
direction
Plus referencing
direction
Minus referencing
direction
Reference signal: Zero
mark
The referencing direction is not defined. The axis is synchronized at the next zero mark.
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