Mitsubishi FX3U Series Programming Manual page 272

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DROR and DRORP)
"n" bits out of 32 bits of [
Command
input
FNC 30
DRORP
• The final bit is stored in the carry flag (M8022).
• In a device with digit specification, K8 (32-bit instruction) is valid.
High order
b31b30b29b28b27b26b25b24b23b22b21b20b19b18b17b16
Before
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
execution
"n" bits
High order
b31b30b29b28b27b26b25b24b23b22b21b20b19b18b17b16
After
0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0
execution
Before shift
b3 to b0
Related device
Device
M8022
Cautions
1. In the case of continuous operation type instructions (ROR and DROR)
Note that shift and rotation are executed in every scan time (operation cycle).
2. 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).
270
+1, ] are rotated rightward.
D D
D n
Rightward
rotation
Name
Carry Turns ON when the bit shifted last from the lowest position is "1".
11 Rotation and Shift Operation – FNC 30 to FNC 39
b15b14b13b12b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
1 1 1 1 1 1 1 1 0 0 0 0
After the The status of
instruction is the bit "n−1" is
executed once copied.
b15b14b13b12b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0
Before shift
b31 to b4
→ For the carry flag use method, refer to Subsection 6.5.2.
Description
D
11.1 FNC 30 – ROR / Rotation Right
"n" bits (in the case of K4)
Low order
Carry flag
M8022
0 0 0 0
b0 to b3 (n−1)
are moved.
The status of the bit "n−1" is
Low order
0
Carry flag
M8022
The contents of
b3 are stored.
copied.