Delta Electronics AC Motor Drive VFD-E - Manual (Page 340)

Appendix D How to Use PLC Function|
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 D-57
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 * * * * *
n
* *
ROR, RORP: 5 steps
Operands:
D: Device to be rotated n: Number of bits to be rotated in 1 rotation
Explanations:
1. This instruction rotates the device content designated by D to the right for n bits.
2. This instruction adopts pulse execution instructions (RORP).
Program Example:
When X0 goes from Off to On, the 16 bits (4 bits as a group) in D10 will rotate to the right, as shown
in the figure below. The bit marked with ※ will be sent to carry flag M1022.
0 1 1 1 0 1 0 1 0 0 1 1 1 0 0 1
0 1 0 1 1 1 0 0 1 1 1 1 0 0 1 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
API Mnemonic Operands Function
31 ROL P D, n Rotate to the Left
Bit Devices Word devices Program Steps Type
OP
X Y M K H KnX KnY KnM T C D
D * * * * *
n
* *
ROL, ROLP: 5 steps