Delta Electronics VFD-E manual Ror, Rol

Appendix D How to Use PLC Function

API

30

Mnemonic		Operands	Function
ROR	P	D, n	Rotate to the Right

Type	Bit Devices					Word devices					Program Steps
OP	X	Y	M	K	H	KnX	KnY	KnM	T	C	D ROR, RORP: 5 steps
D							*	*	*	*	*
n				*	*
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.

	X0							RORP				D10			K4
						Rotate to the right
D10		upper bit														lower bit			Carry
		0	1	1	1	1	0 1		1	0	1	0	0	0	1	0	1
																			flag
									16 bits
								After one rotation
		upper bit							to the right							lower bit
D10		0	1	0	1 0		1	1	1	1	0	1	1	0	1	0	0	0	Carry
		*																	flag

API

31

Mnemonic		Operands	Function
ROL	P	D, n	Rotate to the Left

Type	Bit Devices					Word devices					Program Steps
OP	X	Y	M	K	H	KnX	KnY	KnM	T	C	D ROL, ROLP: 5 steps
D							*	*	*	*	*
n				*	*

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 D-57