Nop (No Operation) Instruction - Siemens SIMATIC S7 System Manual

Example SR and RS
LAD
7.1.10

NOP (No operation) instruction

LAD STL
NOP N
Inputs / Output Data type
N (LAD, STL) BYTE
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
Description
The No Operation (NOP) instruction has no effect on the user program execution.
This instruction is not available in FBD mode. The operand N is a number from 0
to 255.
Operand
N: Constant (0 to 255)
Program instructions
STL
NETWORK 1
LD I0.0
LD I0.1
NOT
A Q0.0
OLD
= Q0.0
NETWORK 2
LD I0.0
LD I0.1
NOT
LPS
A Q0.1
= Q0.1
LPP
ALD
O Q0.1
= Q0.1
7.1 Bit logic
181