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When the variable start changes from FALSE to TRUE, the function is carried out. It rotates 4 bits
(corresponds to one position in a hexadecimal representation) to the right. At input n the constant 4
is assigned directly to the function. You may, however, declare an input variable in the POU header
instead.
LD
ST
When programming with structured text, enter the following:
IF
DF(start)
THEN
F125_DROR( n:= 4,
d=> data);
END_IF;
Bit-shift instructions
595
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