Appendix D How to Use PLC Function
VFD-E Series
D-50 Revision August 2006, 01EE, SW--PW V1.03/CTL V2.03
API Mnemonic Operands Function
30 ROR P D, n Rotate to the Right
Bit Devices Word devices Program Steps
Type
OP
X Y M K H KnX KnY KnM T C D
D * * * * *
ROR, RORP: 5 steps
n
* *
Explanations:
1. If operand D is specified as KnY, KnM, only K4 (16-bit) is valid.
2. Essential condition: 1n16 (16-bit).
3. D: Rotation device (destination device) n: Bit places of one time rotation.
4. The bit pattern of device D is rotated n bit places to the right on every operation of the
command.
5. M1022 (Carry flag).
Program Example:
When X0 goes from OFF to ON, the 16 bit data of D10 will rotate 4 bits to the right, as shown in the
diagram, and b3 that located at D10 originally will then be moved to the carry flag (CY) M1022.
01110101 00111 001
010111001111001 0
0
upper bit lower bit
upper bit lower bit
*
X0
RORP
D10 K4
Rotate to the right
16 bits
Carry
flag
Carry
flag
After one rotation
to the right
D10
D10
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