Siemens Simatic S7-200 System Manual page 295

Invert Example
I4.0
Figure 10-50
S7-200 Programmable Controller System Manual
C79000-G7076-C230-02
LAD
INV_W
EN
AC0 IN OUT AC0
Application
Invert Word
AC0 1101 0111 1001 0101
complement
AC0 0010 1000 0110 1010
Example of Invert Instruction for LAD and STL
Instruction Set
STL
LD I4.0
INVW AC0
10-107