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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
11 Rotation and Shift Operation – FNC 30 to FNC 39
11.3 FNC 32 – RCR / Rotation Right with Carry
2. 32-bit operation (DRCR and DRCRP)
"n" bits out of 32 bits of [ +1, ] and 1 bit (carry flag M8022) are rotated rightward.
Related device
→ For the carry flag use method, refer to Subsection 6.5.2.
Cautions
• In the case of continuous operation type instructions (RCR and DRCR)
Note that shift and rotation are executed in every scan time (operation cycle).
• When a device with digit specification is specified as
Only K4 (16-bit instruction) or K8 (32-bit instruction) is valid (examples: K4Y010 or K8M0).
• Note that the 32-bit value [n+1, n] is valid when D or R is specified as "n" in a 32-bit instruction.
In the case of "DRCR D100 R0", "n" is [R1, R0].
Device Name Description
M8022 Carry Turns ON when the bit shifted last from the lowest position is "1".
D
D
Before shift
b3
Carry flag M8022
When M8022 is OFF
0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0
1
Carry flag M8022
Low order
b15b14b13b12b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
After the
instruction is
executed once
High order
0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0
b31b30b29b28b27b26b25b24b23b22b21b20b19b18b17b16
Before shift b31 to b4
High order
1 1 1 1 1 1 1 1 0 0 0 0 1 0 0 0
Low order
Rightward
rotation
b15b14b13b12b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
b31b30b29b28b27b26b25b24b23b22b21b20b19b18b17b16
The status
of the final
bit b3 (bit
"n
−
1") is
stored.
"n" bits (in the case of K4)
"n" bits
0
Before shift
Carry flag M8022
Before
shift
b2 to b0
b2 (n
−
2) to b0 and the head bit
indicating the carry flag ON/OFF
status are moved.
Before
execution
After
execution
Command
input
FNC 32
DRCRP
nD
D