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Chapter Five PLC Function Code
43
V
o
lume
I Programming
which reaches to the objective position or the previous position. Always check
whether the ACT is 1 when using the calculation result.
Output:
W : Rotation direction output. It outputs to the W by the short-circuit rotation direction,
its direction is positive (FOR) when W=0; it is the negative direction (REV) when
W=1. The definitions of the FOR and REV are shown below, the increase direction
of the position number of the revolving table is positive (FOR); it is the negative
direction in the decrease state. The address of W can be selected freely, however,
if the W results should be used, always check the condition of the ACT=1.
For example:
One revolving table is shown below:
Fig. 5-19-2
Fig. 5-19-3
Perform the short path rotation, and calculate the position No. of the previous one for the
objection position.
Current position No. S2=1, revolving index position No. S1
＝
12, CNO=1, DIR=1, POS=1 and
INC=0
Wherein:
S3=10, S4
＝
11, W
＝
1, when the objective position is A in the ACT = 1.
S3=8, S4
＝
9, W
＝
1, when the objective position is B in the ACT = 1.
