Siemens SIMATIC S5-90U System Manual page 485

S5-90U/S5-95U
Typical Application
A counter module is plugged into slot 2. A value of 100 is set on channel "0" of this module via the
three-digit thumbwheel switches.
enabled by the control program. As soon as 100 pulses have been counted, a signal (output 4.0) is
released.
STL
S Q 2.0
A I 2.0
= Q 4.0
EWA 4NEB 812 6115-02b
The incoming pulses are counted once the counter has been
Connection Diagram
1 3 5 7
2 4 6
During the counting operation, input I 2.0 is "0". When
the counter status is "0", input I 2.0 is set to "1".
Output Q 4.0 is then also set. Direct output at terminals
5 and 6 is possible.
9
8 10
Explanation
Function Modules
16-17