Rotr (Rotate Right) - IDEC MICROSmart FC6A Series Ladder Programming Manual

9: S / R I
HIFT OTATE NSTRUCTIONS

ROTR (Rotate Right)

ROTR(*)
*****
• Data Type: Word (bits to rotate = 1)
Before rotation:
After rotation:
• Data Type: Double Word (bits to rotate = 1)
Before rotation:
MSB
1 0 0 1
After rotation:
MSB
0 1 0 0
Valid Devices
Device
S1 (Source 1)
bits
For valid device address ranges, see "Device Addresses" on page 2-1.
Special internal relays cannot be designated as S1.
The number of bits that can be rotated is 1 through 15 for word data, or 1 through 31 for double-word data.
Since the ROTR instruction is executed in each scan while input is on, a pulse input from a SOTU or SOTD instruction should be used.
Valid Data Types
W (word) X
I (integer) —
D (double word) X
L (long) —
F (float) —
9-10
When input is on, 16- or 32-bit data of the assigned source device S1 is rotated to the right by the
quantity of bits assigned by device bits.
S1 bits
**
The result is set to the source device S1, and the last bit status rotated out is set to special internal
relay M8003 (carry or borrow).
MSB
1
MSB
0
1 0 1 0 1 1 1 0 0
Rotate to the right
1 1 0 1 0 1 1 1 0
Function
Data for bit rotation
Quantity of bits to rotate
When a bit device such as Q (output), M (internal relay), or R (shift register) is assigned as the source, 16 points
(word data) or 32 points (double-word data) are used.
When a word device such as D (data register) is assigned as the source, 1 point (word data) or 2 points (double-
word data) are used.
FC6A S MICROS
ERIES MART
S1
0 0 1 1 0 1 0 1 1
Rotate to the right
S1
1 0 0 1 1 0 1 0 1
S1
1 1 0 1 0 0 1 1
S1
0 1 1 0 1 0 0 1
I Q
— X
— — —
L P M
ADDER ROGRAMMING ANUAL
LSB
1 0 0 1 1 0
M8003
LSB
1 1 0 0 1 1
M8003
0 1 0 1 1 1 0 0 1
1 0 1 0 1 1 1 0 0
M R T C D P
X — — X —
— — — — —
FC9Y-B1726
CY
CY
0
LSB CY
1 0
M8003
LSB CY
1 1 0
M8003
Constant Repeat
— —
1-15,
—
1-31