Mitsubishi Electric MELSEC FX3U Programming Manual page 316

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DRCL and DRCLP)
"n" bits out of 32 bits of [
Command
input
FNC 33
DRCLP
Before
b31 to b28
execution
(b32−n)
are
moved.
The status
After
of the final
execution
bit b28 (bit
"32−n") is
stored.
Related device
Device
M8022
Cautions
• In the case of continuous operation type instructions (RCL and DRCL)
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 "DRCL D100 R0", "n" is [R1, R0].
314
+1,
D D
D n
"n" bits (in the case of K4)
High order
b31b30b29b28b27b26b25b24b23b22b21b20b19b18b17b16
1 1 1 0 1 1 1 1 0 0 0 0 0 0 0 0
1
Carry flag
When M8022
is ON
High order
b31b30b29b28b27b26b25b24b23b22b21b20b19b18b17b16
1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1
Carry flag M8022
0
Before shift b28
Name
Carry Turns ON when the bit shifted last from the highest position is "1".
11 Rotation and Shift Operation – FNC 30 to FNC 39
] and 1 bit (carry flag M8022) are rotated leftward.
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
After the
instruction is
executed once
Leftward
rotation
b15b14b13b12b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1
Before shift b27 to b0
→ For the carry flag use method, refer to Subsection 6.5.2.
D
11.4 FNC 33 – RCL / Rotation Left with Carry
b31 to b29 (32−n+1) and the head
bit indicating the carry flag ON/OFF
status are moved.
Before shift
Carry flag M8022
Description
Low order
Low order
Before shift
b31 to b29