User Manual 08/2003 Edition

02.99 04.01
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition
5 Description of the Functions
5.5 SIMODRIVE POSMO A functions
Set reference coordinate
The position of the last zero mark before the end of the second program
block is therefore set to the value in P5 (reference point coordinate).
Set simplified reference position (from SW 1.4)
The drive is automatically referenced when the above traversing program
is run if the following is specified in the second block:
P85:14 (signal position for block 14)
= set ”required reference point” coordinate
Set PSW.9 (set reference position) to 1
In this case, the last part of the example above is eliminated.
Note
If the direction of rotation is reversed in both traversing blocks
(negative velocity), the reference point approach is executed in the
opposite direction.
In order to select the last zero mark at the reference cam as
reference point coordinate, the shutdown velocity should be
selected low enough, so that when braking after leaving the cam,
no other zero marks are passed.
Reference cam length
A cam length should be selected so that the axis brakes from the
approach velocity to the shutdown velocity while still at the cam.
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