Filling Liquids - Siemens SIMATIC ET 200S Operating Instructions Manual

5.4.2

Filling Liquids

Task
Filling is started as soon as a container is under the valve. The valve is opened for a preset
pulse duration by means of the 24 V control signal. The amount of liquid is proportional to
the specified pulse duration.
The 2PULSE generates the 24 V control signal at its digital output for the pulse duration you
have specified. After it has been filled, the container is moved along.
Figure 5-16
Requirements
• The volume of liquid to be filled is proportional to the time the valve is open.
• The cross-section of the feeder pipe cannot be changed.
• The valve only has the two positions OPEN and CLOSED.
• The minimum pulse duration must be longer than the on/off times specified by the
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
Filling Liquids
manufacturer.
2PULSE
5.4 Application Examples
291