Siemens SIMATIC S7-200 - Examples of Boolean Contact Instructions for LAD and FBD; Output

IEC 1131-3 Instructions
10-4
S7-200 Programmable Controller System Manual
A5E00066097-02
Contact Examples
Network 1
%Q0.0
LAD
%I0.0 %I0.1
Network 2
%Q0.1%I0.0
NOT
Network 3
%Q0.2%I0.1
N
Timing Diagram
I0.0
I0.1
Q0.0
Q0.1
Q0.2
On for one scan
FBD
Network 1
Network 2
Network 3
AND
Output
%I0.1
Input
=
Input
N
%I0.1
%Q0.1
%Q0.2
Figure 10-1 Examples of Boolean Contact Instructions for LAD and FBD
Output
When the Output is executed, the output is turned on.
In LAD, the Output instruction is represented by a coil.
In FBD, the instruction is represented by the = box.
Inputs/Outputs Operands Data Types
bit (LAD/FBD) I, Q, M, SM, T, C, V, S, L BOOL
Input (LAD) Power flow BOOL
Input (FBD) I, Q, M, SM, T, C, V, S, L, Power Flow BOOL
bit
=
F
B
D
L
A
D
bit
222 224
✓✓✓
221 226
✓