End; Nop; Inv - Delta C2000 series User Manual

Mnemonic
Program End

END

Operand
It needs to add the END command at the end of ladder diagram program or
command program. PLC will scan from address o to END command, after the
execution it will return to address 0 and scan again.
Mnemonic
No action

NOP

Operand
NOP command does no operation in the program; the result of executing this
command will remain the logic operation. Use NOP command if user wants to delete
certain command without changing the length of the program.
Ladder diagram:
Example
NOP command will be simplified and not
displayed when the ladder diagram is
displayed.
X0
Mnemonic
Inverse operation result

INV

Operand
The operation result (before executing INV command) will be saved inversely into
cumulative register.
Ladder diagram:
Example
X0
Y1
NOP
Y1
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Chapter 16 PLC Function C2000 Series
Function
None
Function
None
Command code:
LD X0
NOP
OUT Y1
Function
None
Command code:
LD X0
INV
OUT Y1
Operation:
Load contact B of X0
No function
Drive Y1 coil
Operation:
Load contact A of X0
Operation result
inversed
Drive Y1 coil