Mitsubishi Electric FX3G SERIES Programming Manual page 301

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DRCR and DRCRP)
"n" bits out of 32 bits of [
Command
input
FNC 32
DRCRP
High order
b31b30b29b28b27b26b25b24b23b22b21b20b19b18b17b16
Before
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
execution
b2 (n−2) to b0 and the head bit
indicating the carry flag ON/OFF
status are moved.
"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
b2 to b0
Related device
Device
M8022
Cautions
• In the case of continuous operation type instructions (RCR and DRCR)
Note that shift and rotation are executed 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].
+1, ] and 1 bit (carry flag M8022) are rotated rightward.
D D
D n
Before shift
Carry flag M8022
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
11.3 FNC 32 – RCR / Rotation Right with Carry
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
instruction is
executed once
Rightward
rotation
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
"n" bits (in the case of K4)
Low order
1 0 0 0
0
Carry flag M8022
When M8022 is OFF
The status
Low order
of the final
bit b3 (bit
"n−1") is
stored.
Carry flag M8022
1
Before shift
b3
299
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