Delta VP3000 Series - 7-2-2 Instructions of basic instructions

Chapter 7 Second Development Platform VP3000
278
7-2-2 Instructions of basic instructions
Instruction Function
LD Load contact A
Operand
X0–X17 Y0–Y17 M0–M799 T0–159 C0–C79 D0–D399
     －
Description
LD instruction is used on the contact A that has its start from the left BUS bar or contact A
that is the start of a contact circuit. The functions are to save the present contents and store
the acquired contact status into the accumulative register.
Example
Ladder diagram:
X0
X1
Y1
Instruction code Operation
LD X0
Load X0 (the contact
A)
AND X1
Connect X1 (the contact
A) in serial
OUT Y1 Drive Coil Y1
Instruction Function
LDI Load contact B
Operand
X0–X17 Y0–Y17 M0–M799 T0–159 C0–C79 D0–D399
     －
Description
LDI instruction is used on the contact B that has its start from the left BUS bar or contact B
that is the start of a contact circuit. The functions are to save the present contents and store
the acquired contact status into the accumulative register.
Example
Ladder diagram:
X0
X1
Y1
Instruction code Operation
LDI X0
Load X0 (the contact
B)
AND X1
Connect X1 (the contact
A) in serial
OUT Y1 Drive Coil Y1
Instruction Function
AND Connect contact A in serial
Operand
X0–X17 Y0–Y17 M0–M799 T0–159 C0–C79 D0–D399
     －
Description
AND instruction is used in the serial connection of contact A. The functions are to read out
the contacts’ status of present serial connection and perform “AND” operation with the
logical operation result obtained. The final result will be stored in the accumulative register.
Example
Ladder diagram:
X1
X0
Y1
Instruction code Operation
LDI X1 Load X1 (the contact B)
AND X0
Connect X0 (the
contact A) in serial
OUT Y1 Drive Coil Y1