Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 157)

3 Basic Instructions
DVP-PLC Application Manual 3-3
3.2 Explanations on Basic Instructions
Mnemonic Function Program steps
LD Loading in A contact 1
Controllers
ES EX SS SA SX SC EH SV
X0 ~ X377 Y0 ~ Y377 M0 ~ M4095 S0 ~ S1023 T0 ~ T255 C0 ~ C255 D0 ~ D9999
Operand
9 9 9 9 9 9 -
Explanations:
The LD instruction 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. The functions are to save the present contents and store the acquired contact status into the
accumulative register.
Program Example:
Ladder diagram: Instruction code: Operation:
LD X0 Loading in contact A of X0
AND X1 Connecting to contact A of X1 in series
X0 X1
Y1
OUT Y1 Driving Y1 coil
Mnemonic Function Program steps
LDI Loading in B contact 1
Controllers
ES EX SS SA SX SC EH SV
X0 ~ X377 Y0 ~ Y377 M0 ~ M4095 S0 ~ S1023 T0 ~ T255 C0 ~ C255 D0 ~ D9999
Operand
9 9 9 9 9 9 -
Explanations:
The LDI instruction 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. The functions are to save the present contents and store the acquired contact status into the
accumulative register.
Program Example:
Ladder diagram: Instruction code: Operation:
LDI X0 Loading in contact B of X0
AND X1 Connecting to contact A of X1 in series
X0 X1
Y1
OUT Y1 Driving Y1 coil
Mnemonic Function Program steps
AND Series connection- A contact 1
Controllers
ES EX SS SA SX SC EH SV
X0 ~ X377 Y0 ~ Y377 M0 ~ M4095 S0 ~ S1023 T0 ~ T255 C0 ~ C255 D0 ~ D9999
Operand
9 9 9 9 9 9 -
Explanations:
The AND instruction is used in the series connection of A contact. The functions are to read out the status of present d