Delta Electronics VFD-E manual Ldi, Mnemonic

Appendix D How to Use PLC Function

Explanations:

The LDI command is used on the B contact that has its start from the left BUS or the B contact that is the start of a contact circuit. Function of the command is to save present contents, and at the same time, save the acquired contact status into the accumulative register.

Program Example:
Ladder diagram:	Command code: Operation:

X0

X1

Y1

LDI

X0

Load contact B of X0

AND

X1

Connect to contact A of X1 in series

OUT

Y1

Drive Y1 coil

Mnemonic

Function

AND

Series connection- A contact

Operand

X0~X17

Y0~Y17

M0~M159

T0~15

C0~C7

D0~D29

9

9

9

9

9

--

Explanations:

The AND command is used in the series connection of A contact. The function of the command is to readout the status of present specific series connection contacts first, and then to perform the “AND” calculation with the logic calculation result before the contacts, thereafter, saving the result into the

accumulative register.
Program Example:
Ladder diagram:				Command code:		Operation:
	X1	X0	Y1	LDI	X1	Load contact B of X1
				AND	X0	Connect to contact A of X0 in series
				OUT	Y1	Drive Y1 coil

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 D-31