Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 533

Processing details
■ROL(P)
• These instructions rotate the 16-bit binary data in the device specified by (d) to the left by (n) bit(s), excluding the carry flag
(SM700). The carry flag (SM700) is on or off depending on the status prior to the execution of the ROL(P) instruction.
(SM700)
b15 b14 b13 b12 b11 b10 b9
0 1 0 1
(SM700)
b15 b14 b13 b12 b11 b10 b9
1 0 1 0
Value of b15
(SM700)
b15 b14 b13 b12 b11 b10 b9
0 1 0 0
Value of b15
(SM700)
b15 b14 b13 b12 b11 b10 b9
Value of b(16-(n))
• When (d) is a bit device, bits are rotated to the left within the device range specified by digit 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 to the left because 18 divided by 16 equals 1 with a remainder of 2.
b8 b7 b6 b5 b4 b3 b2 b1
0 0 0 0 0 0 0 0
Left rotation by 1 bit
b8 b7 b6 b5 b4 b3 b2 b1
0 0 0 0 0 0 0 0
Left rotation by 1 bit
b8 b7 b6 b5 b4 b3 b2 b1
0 0 0 0 0 0 0 0
Left rotation by (n) bits
b8 b7 b6 b5 b4 b3 b2 b1
b0
0 0 0 0 0
(d)
b0
0 0 0 0 1 (d)
Value of b15
b0
0 0 0 1 0 (d)
Value of b15
b0
(d)
Value of b(16-(n))
7 APPLICATION INSTRUCTIONS
531
7.1 Rotation Instructions
7