Delta VFD17AMS23ANSAA

Chapter 16 PLC Function ApplicationsMS300
704
Command
Function
NOP
No action
Operand
N/A
The NOP command does not perform any operation in the program. Because
execution of this command retains the original logical operation results, you can use
it in the following situation: use the NOP command instead of a command that is
deleted without changing the program length.
Ladder diagram:
Command code:
Description:
LD
X0
Load Contact B of X0
NOP
No action
OUT
Y1
Drive Y1 coil
Command
Function
INV
Inverse of operation results
Operand
N/A
Saves the result of the logic inversion operation prior to the INV command in the
cumulative register.
Ladder diagram:
X0
Y1
Command code:
Description:
LD
X0
Load Contact A of X0
INV
Inverse of operation
results
OUT
Y1
Drive Y1 coil
Command
Function
P
Pointer
Operand
P0–P255
Use pointer P as the target in a subprogram call (command API 01 CALL). Using P
does not require starting from zero, but the number cannot be used repeatedly;
otherwise, an unpredictable error occurs.
Ladder diagram:
X0
Y1
CALL
P10
X1
P10
Command code:
Description:
LD
X0
Load Contact A of X0
CALL
P10
Call command CALL to
P10
：
P10
Pointer P10
LD
X1
Load Contact A of X1
OUT
Y1
Drive Y1 coil