Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual page 378

■RCL(P)
• These instructions rotate the 16-bit binary data in the device specified by (d) to the left by (n) bit(s) (including the carry flag).
The carry flag is on or off depending on the status prior to the execution of the instruction.
(SM700, SM8022)
(SM700, SM8022)
Value of b15
(SM700, SM8022)
(SM700, SM8022)
Value of b(16-n)
• When (d) is a bit device, bits are rotated to the left within the device range specified by nibble specification. The number of
bits actually to be rotated is the remainder of (n)(specified number of bits). For example, when (n) is 15 and the specified
number of bits is 12, 3 bits are rotated because 15 divided by 12 equals 1 with a remainder of 3.
• Specify any value between 0 and 15 for (n). If a value 16 or bigger is specified, bits are rotated by the remainder value of
n16. For example, when (n) is 18, 2 bits are rotated because 18 divided by 16 equals 1 with a remainder of 2.
Precautions
• Do not set a negative value to the number of bits to be rotated (n).
• In the case of continuous operation type instructions (ROL and RCL), note that shift and rotation are executed in every scan
time (operation cycle).
Operation error
There is no operation error.
8 APPLICATION INSTRUCTION
376
8.1 Rotation Instruction
b15 b14 b13 b12 b11 b10
0 1 0 1
b15 b14 b13 b12 b11 b10
1 0 1 0
b15 b14 b13 b12 b11 b10
0 1 0 0
Value of b15
b15 b14 b13 b12 b11 b10
b9 b8 b7
0 0 0 0 0 0
Rotating 1-bit data to the left
b9 b8
b7
0 0 0 0 0 0
Rotating 1-bit data to the left
b9 b8 b7
0 0 0 0 0 0
Rotating n-bit data to the left
b9 b8
b6 b5 b4 b3 b2 b1
0 0 0 0 0 0
b6 b4 b3 b2 b1
b5
0 0 0 0 0 0
b6 b5 b4 b3 b2 b1
0 0 0 0 0 0
b7 b6 b5 b4 b3 b2
b0
0 (d)
b0
0
(d)
Carry flag value
b0
1
(d)
Carry flag value
b1 b0
(d)