Specifications

IEC 1131-3 Instructions
10-18
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Counter Example
I4.0
CU-Up
Timing Diagram
LAD FBD
I3.0
CD-Down
%I4.0
C48
%I3.0
4
%I2.0
CTUD
CU
R
CD
PV
I2.0
R-Reset
0
1
2
3
4
3
4
0
VW0
CV-current
Q0.0
QU-Up
QU
CV
QD
%I1.0
CTUD
CU
R
CD
PV
QU
CV
QD
I4.0
I3.0
I2.0
LD
LD
4
I1.0
LD-Load
QD.1
QD-Down
%I1.0
%Q0.0
%Q0.1
%VW0
C48
%Q0.0
%Q0.1
%VW0
4
2
3
4
Figure 10-6 Example of Counter Instruction for LAD and FBD