Mitsubishi Electric MELSEC iQ-R Series - Page 533

7 APPLICATION INSTRUCTIONS
7.1 Rotation Instructions
531
7
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.
• 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.
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
0
0
1001000 0 0
0
0000
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
1
0
0010000 0 0
0
0000
0
1
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
0
0
1000000 0 0
0
0001
0
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
…
(d)
(d)
(d)
(d)
(SM700)
(SM700)
(SM700)
(SM700)
Value of b15
Left rotation by 1 bit
Left rotation by 1 bit
Value of b15Value of b15
Value of b(16-(n))
Left rotation by (n) bits
Value of b(16-(n))
Value of b15