4 Basic Instructions
4.2 Descriptions of the Basic Instructions
Instruction
code
Function Applicable model
20PM
LD
Loading a Form A contact
X0~X377 Y0~Y377 M0~M4,095 S0~S1,023 T0~T255 C0~C255 D0~D9,999
Operand
-
Explanation
The instruction LD applies to the Form A contact which starts from a busbar or
the Form A contact which is the start of a circuit. It reserves the present
contents, and stores the state which is gotten in the accumulation register.
Example
Ladder diagram:
X0 X1
Y1
Instruction code: Description:
LD X0
Loading the Form A
contact X0
AND X1 Connecting the
Form A contact X1
in series
OUT Y1 Driving the coil Y1
Instruction
code
Function Applicable model
20PM
LDI
Loading a Form B contact
X0~X377 Y0~Y377 M0~M4,095 S0~S1,023 T0~T255 C0~C255 D0~D9,999
Operand
-
Explanation
The instruction LDI applies to the Form B contact which starts from a busbar or
the Form B contact which is the start of a circuit. It reserves the present
contents, and stores the state which is gotten in an accumulation register.
Example
Ladder diagram:
X0 X1
Y1
Instruction code: Description:
LDI X0
Loading the Form B
contact X0
AND X1 Connecting the Form
A contact X1 in series
OUT Y1 Driving the coil Y1
DVP-20PM Application Manual
4-3