Ghisalba VFD-E Series

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Appendix D How to Use PLC Function

VFD-E Series

Revision August 2006, 01EE, SW--PW V1.03/CTL V2.03 D-27

Explanations:

The LD command is used on the A contact that has its start from the left BUS or the A 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

LD X0 Load contact A of X0

AND X1 Connect to contact A of X1

in series

X0 X1

OUT Y1 Drive Y1 coil

Mnemonic Function

LDI Load B contact

X0~X17 Y0~Y17 M0~M159 T0~15 C0~C7 D0~D29 X0~X17

Operand

999999

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:

LDI X0 Load contact B of X0

AND X1 Connect to contact A of X1 in series