4-1
OP27,
OP37 Equipment Manual
Release 05/99
Screens
Processes
(e.g. a processing machine or mixing station) are displayed on and
can be influenced by screens which appear on the OP
. These screens are
created during configuration with ProT
ool for specific applications.
Logically related process values are compiled on screens and thus provide an
overview of a process or a system. Apart from this graphic mapping of pro
-
cesses, screens provide an opportunity of entering new process values and,
thus, of controlling the process.
4.1 Screen Elements
Various
screen elements are used to display and control screens:
text
graphics
character graphics
input fields for process values
output fields for process values
combined input/output fields
bar graphs
trends
text or graphic lists
icons.
The dif
ferent screen elements are presented on the basis of the following exam
-
ples.
Part of the contents of various tanks are filled and mixed in a mixing unit of a
fruit juice mixing system. The liquid levels in the tanks and in the mixer are
displayed. The intake valves can be opened and closed by means of operator
inputs on the OP
. The motor for the mixer can be turned on and of
f in a similar
manner.
Process control
and monitoring
Screen sections
Example
4
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