
B-63983EN/02 4.LADDER LANGUAGE
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Rotating direction output (W1)
The direction of rotation for control of rotation via the shorter path is
output to W1. When W1=0, the direction is forward (FOR) when 1,
reverse (REV). The definition of FOR and REV is shown in Fig. 4.13.1
(b). If the number given to the rotor is ascending, the rotation is FOR;
if descending, REV. The address of W1 can be determined arbitrarily.
When, however, the result of W1 is to be used, always check that
ACT=1.
1
10
11
12
2
3
4
5
6
7
8
9
(a)
An example of a 12-position rotor
Indexing fixed position
FOR REV
1
4
3
2
12
11
10
9
8
7
6
5
(b)
Indexing fixed position
FORREV
Fig. 4.13.1 (b) Rotation direction