Siemens Simatic S7 Series

Program instructions
7.8 Math
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
261
Integer operations from the LAD example
IN1
IN2
OUT
Add data
40
+
60
=
100
Data address
AC1
AC0
AC0
Multiply data
40
*
20
=
800
Data address
AC1
VW100
VW100
Divide data
4000
/
40
=
100
Data address
W200
VW10
VW200
Example: Real math instructions
LAD
STL
Network 1
LD I0.0
+R AC1, AC0
*R AC1, VD100
/R VD10, VD200
Real number operations from the LAD example
IN1
IN2
OUT
Add data
4000.0
+
6000.0
=
10000.0
Data address
AC1
AC0
AC0
Multiply data
400.0
*
200.0
=
80000.0
Data address
AC1
VD100
VD100
Divide data
4000.0
/
41.0
=
97.5609
Data address
VD200
VD10
VD200