IDEC MICROSmart FC6A Series Ladder Programming Manual

FC6A S ERIES MICROS MART L ADDER P ROGRAMMING M ANUAL FC9Y-B1726 9-11
9: S HIFT / R OTATE I NSTRUCTIONS
Example: ROTR
•Data Type: Word
•Data Type: Double Word
M8120 is the initialize pulse special internal relay.
When the CPU starts operation, the MOV (move) instruction sets 13 to data register
D20.
Each time input I1 is turned on, 16-bit data of data register D20 is rotated to the right by
2 bits as assigned by device bits.
The last bit status rotated out is set to special internal relay M8003 (carry or borrow).
M8120
REP
SOTU
I1
S1 –
13
D1 –
D20
S1
D20
bits
2
ROTR(W)
MOV(W)
Before rotation: D20 = 13
0 0 0000 0 0 0 0 0100 1 1
CY
M8003
MSB LSB
D20
After first rotation: D20 = 16387
Bits to rotate = 2
After second rotation: D20 = 53248
00 0 0001 0 0 0 0 1000 0 1
CY
M8003
MSB LSB
D20
11 0 0011 0 0 0 0 0000 0 0
CY
M8003
MSB LSB
D20
Each time input I1 is turned on, 32-bit data of data registers D20 and D21 is rotated to
the right by 1 bit as assigned by device bits.
The last bit status rotated out is set to special internal relay M8003 (carry or borrow).
SOTU
I1
S1
D20
bits
1
ROTR(D)
Bits to rotate = 1
Before rotation: D20·D21 = 851,981
After rotation: D20·D21 = 2,147,909,638
0 0 0000 0 0 0 0 0100 1 1
CY
M8003
MSB LSB
D20·D21
1
CY
M8003
MSB LSB
D20·D21
Rotate to the right
0 0 0000 0 0 0 0 0100 1 1
0 0001 0 0 0 0 1000 0 1 0 0 0001 0 0 0 0 1000 0 1 0

IDEC MICROSmart FC6A Series Specifications

General

Brand	IDEC
Model	MICROSmart FC6A Series
Category	Computer Hardware
Language	English