Mitsubishi Electric FX3U SERIES - FNC 31 - ROL; Rotation Left

296
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
11 Rotation and Shift Operation – FNC 30 to FNC 39
11.2 FNC 31 – ROL / Rotation Left
11.2 FNC 31 – ROL / Rotation Left
Outline
This instruction shifts and rotates the bit information leftward by the specified number of bits without the carry flag.
1. Instruction format
2. Set data
*1. Do not set a negative value to the number of bits to be rotated.
3. Applicable devices
S1: In 16-bit operations, K4Y{{{, K4M{{{ and K4S{{{ are valid.
In 32-bit operations, K8Y{{{, K8M{{{ and K8S{{{ are valid.
S2: This function is supported only in FX
3U/FX 3UC PLCs.
Explanation of function and operation
1. 16-bit operation (ROL and ROLP)
"n" bits out of 16 bits of are rotated leftward.
• The final bit is stored in the carry flag (M8022).
• In a device with digit specification, K4 (16-bit instruction) is valid.
Operand Type Description Data Type
Word device number storing data to be rotated leftward 16- or 32-bit binary
n
Number of bits to be rotated
[n ≤ 16 (16-bit instruction), n ≤ 32 (32-bit instruction)]
*1
16- or 32-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b KnX KnY KnM KnS T C D R U\G V Z Modify K H E ""P
S1 S1 S1
3333
S2
33 3
n 33 33
16-bit Instruction
5 steps
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
ROL
ROLP
DROL
DROLP
Mnemonic Operation Condition
32-bit Instruction
9 steps
Continuous
Operation
Pulse (Single)
Operation
P
FNC 31
ROL
D
D
D
D
Command
input
FNC 31
ROLP
nD 
High order
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1
Low order
High order Low order
Leftward
rotation
b15b14b13b12b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Before shift
b15 to b12
Before shift
b11 to b0
After the
instruction
is executed
once
b15b14b13b12b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
1
Carry flag
M8022
Carry flag
M8022
The contents of
b12 are stored.
"n" bits (in the case of K4)
b12 (16 − n) to
b15 are moved.
"n" bits
The status of
the bit "16
− n" is
copied.
Before
execution
After
execution