Appendix C Use of Basic Instructions|DOP-EXIO Series
Revision March, 2008, Doc. Name: 2007PDD23000014 C-1
Appendix C Use of Basic Instructions
Mnemonic Functions
LD
Loading in A contact
X0~X17 Y0~Y17 M0~M1279 S0~S127 T0~T127 C0~C254 D0~D599
Operand
9 9 9 9 9 9
-
Explanation:
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 Functions
LDI
Loading in B contact
X0~X17 Y0~Y17 M0~M1279 S0~S127 T0~T127 C0~C254 D0~D599
Operand
9 9 9 9 9 9
-
Explanation:
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 Functions
AND
Series Connection- A Contact
X0~X17 Y0~Y17 M0~M1279 S0~S127 T0~T127 C0~C254 D0~D599
Operand
9 9 9 9 9 9
-
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