D-41
D.5.8 Explanation for the Commands
Mnemonic Function
LD Load
A
contact
Operand
X0~X17 Y0~Y17
M0~M159 T0~15 C0~C7 D0~D29
--
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
X0
X1
Y1
LD
X0
Load contact A of X0
AND
X1
Connect to contact A of X1
in series
OUT
Y1
Drive Y1 coil
Mnemonic Function
LDI Load
B
contact
Operand
X0~X17 Y0~Y17
M0~M159 T0~15 C0~C7 D0~D29
--
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
