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Operating manual ZX09/20/21-Series
13.
Example 1
In this example, the steps of initial commissioning (see section 8.2) are carried out with
a ZX09A for a specific example. Starting with the development of a program in step 1,
the individual steps are carried out until the system is fully operational after completion
of step 9.
13.1
The process
In this example, the control system of a bottling plant is shown. Fig. 31 shows the
process which is to be automated. Empty containers should be transported to a filling
plant via a controlled conveyor belt. With the aid of a light barrier it should be detected
whether a new container has entered the plant. If this is the case, the supplying con-
veyor belt should stop and therefore not transport a new container to the plant. In
the plant, the empty container should be transported under the filling hopper via a
further conveyor belt. A proximity switch should detect whether the container is in the
correct position. If this is the case, the filling process should be started.
The filling process should be continuously monitored by a pressure sensor so that it
will be filled optimally. As soon as the process is completed, the conveyor belt should
transport the now filled container out of the plant. A second light barrier should detect
whether the filled container has left the plant. If this is the case, the first conveyor belt
can be started again to transport a new container to the plant. In addition to this, the
system should have an abort switch with which the current filling process can be
stopped and the error state can be exited.
Should an unknown condition or an error occur, the complete system should stop and
indicate an error condition. The discharging conveyor belt is not controlled.
