Siemens SIMATIC ET 200S Operating Instructions

1PosInc/Digital
3.6 Functions of the 1PosInc/Digital
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
71
3.6.5 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/Digital sets the SYNC = 0 feedback signal and moves the drive at the preset speed
(SPEED control bit) in the assigned parameter start direction and searches for the reference
signal. The 1PosInc/Digital automatically executes the required change of direction at the
limit switches and the reducing cam.
Set the necessary directional enables (DIR_M, DIR_P) to ensure that the drive is controlled.
If the 1PosInc/Digital detects the parameterized reference signal, it controls the drive in
creep feed mode in the 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:
Limit switch minus
Reference switch:
Limit switch plus
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.

Siemens SIMATIC ET 200S Specifications

General

Brand	Siemens
Model	SIMATIC ET 200S
Category	I/O Systems
Language	English