Cutler-Hammer D320 PLC, User Manual

Page: 131 / 258

Chapter 6: Instructions
119
Example
Program Expression Operation Results
If N = 1, the bits shift by one, and the LSB is always
input from F1.8.
If N = 2, the bits shift by two. The bits are shifted one
position, and the first data input to the LSB is F1.8.
The original MSB is stored in F1.8. The bits are
again shifted one position, with the LSB being set by
the new F1.8, and F1.8 being changed to the state of
the last MSB.
R0.0
R
R0.1
R
ROL
D =MO
N = 1
F1.8
(OUT)
M0 $00 $01 $03 $06 $0D
(word)
… 1 1 0 1 1 C
… 0 1 1 0 0 C
… 0 0 1 1 1 C
… 0 0 0 1 1 C
C 0 0 … 0 0 0 0
R0.0
R0.1