Example: Filling Liquids - Siemens SIMATIC ET 200S Operating Instructions Manual

2PULSE
5.7 Application Examples
5.7.2

Example: Filling Liquids

Description
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 5-20
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
324
Filling of liquids
manufacturer.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07