Siemens SIMATIC S7 - Page 306

Program instructions
7.8 Math
S7-200 SMART
306 System Manual, V2.3, 07/2017, A5E03822230-AF
Example: Increment and decrement
LAD
STL
Network 1
LD I4.0
INCW AC0
DECD VD100
Increment/decrement operations from the LAD example
IN
OUT
Increment word
125
+
1
=
126
Data address
AC0
AC0
Decrement double word
128000
-
1
=
127999
Data address
VD100
VD100