PSx3xxDN Instruction Manual
28
The mapping of the desired positioning range to the physical positioning range is
done with the help of the parameter ‘upper mapping end’ (attr. 40).
In the delivery state, the drive is at position 51200, the upper limit switch is set to
101200 and the lower limit switch is set to 1200, yielding a positioning range of ±125
rotations (±50000 increments). So if the desired positioning range doesn’t exceed
±125 rotations, in delivery state none of the following actions to adjust the positioning
range have to be taken.
For the realization of any desired positioning range independent of the possible
positioning range which is defined by the mounting situation (physical positioning
range) there are the following two possibilities:
1) Move the axle (for example a spindle) to the desired position, then move the drive
(with opened collar) to the position value which belongs to the physical position of
the axle, only then close the collar.
Examples:
a) Move the axle in middle position, then move the drive at no-load (with opened
collar) also to middle position (position 51200), then close the collar. The drive
is now capable of moving 125 rotations (±50000 increments by default) in each
direction.
b) Move the axle completely to the left (resp. bottom), then move the drive at no-
load (with opened collar) without loop to the lowest position (position 1200),
then close the collar. The drive is now capable of moving 250 rotations
(±100000 increments by default) to the right (resp. top).
c) Move the axle completely to the right (resp. top), then move the drive at no-load
(with opened collar) to the highest position (position 101200), then close the
collar. The drive is now capable of moving 250 rotations (±100000 increments
by default) to the left (resp. bottom).
2) Mount the drive in any position on the axle, close the collar, then adjust the
positioning range with the help of attr. 40. Attr. 40 defines the upper end of the
positioning range. By default, the upper end is at +256 rotations (position 102400).
If the positioning range doesn’t suit to the actual displayed position after mounting
the drive, the upper end of the positioning range can be adjusted between -256
rotations and +512 rotations.
Examples:
a) After mounting the drive, the displayed position is 51200 (which corresponds
the delivery state). But the positioning range shall solely spread to the right
(resp. top)
Set attr. 40 to 152400.
b) After mounting the drive, the displayed position is 100000. But the positioning
range shall solely spread to the right (resp. top)
Set attr. 40 to 201200.
c) After mounting the drive, the displayed position is 2000. But the positioning
range shall solely spread to the left (resp. bottom)
Set attr. 40 to 3200.
Remarks:
1) When calculating the upper mapping end (attr. 40), a security reserve of 3
rotations has to be kept in mind (1200 increments by default, see the examples
above), because the highest possible position value is 3 rotations below the upper
mapping end. The lowest possible position value is 253 rotations below the upper
mapping end.
2) The above given increment and position values relate to the following settings,
which correspond to the delivery state:
a) referencing value (attr. 4) = 0
b) actual value assessment, numerator (attr. 16) = 400
c) actual value assessment, denominator (attr. 17) = 400
These 3 attributes have an influence on the above given increment and position
values: With the help of the referencing value a shift can be reached, with the help
