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82
Standard Mode
Section 4-6
Bar charts can be output once only, cyclically or after defined events (event-con-
trolled). They are used purely to indicate actual values.
The range of values for outputs extends from -32768 to +32767.
If your mask contains several bars, you should address the variables such
that they can be transferred contiguously.
Each bar varies between a lower limit and an upper limit. Outside these limits, it
changes to the predefined fill pattern for Upper or Lower Limit Exceeded.
Possible applications:
-
Vertical and horizontal trend displays
-
Visualized monitoring of limit values
-
Histograms
-
Filling-level indications
Example of a filling-level indication:
Bitmap:
Lower Limit Exceeded
Intermediate Value
Bitmap:
Lower Limit
Bitmap:
Upper Limit
Bitmap:
Upper Limit Exceeded
Fig. 6: Example of a filling-level indication
The bar mode of representation always means a slower output rate. Each bar
therefore always corresponds to an integer multiple of a character. The smallest
possible bar is equivalent in size to a single character, while the largest bar covers
the entire display. The bars ‘grow’ one pixel at a time.
4.6.1.9
Curve Representation (Trendline)
The curve mode of representation permits value tables to be output as dotted lines.
A ‘curve’ variable must be defined in a mask in order to represent a curve. The size
of the curve is determined by its length and height. If a coordinate system is requir-
ed, it can be displayed with the aid of background images.
The address of the curve variable represents the start of a value table in the PLC.
Each value in the table describes one pixel on the curve. The graphical repre-
sentation of the value table resembles that for cyclic output variables.
Examples of a variable time history:
-
Output of one-time processes
-
Memory function of a point recorder
-
Filling-level curves
A curve is limited by the following parameters:
-
Maximum height:
Height of the display
-
Maximum width:
54 pixels per curve variable
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Страница 1: ...Cat No V056 E1 1 Programmable Terminal NT4S NT15S NT18S OPERATION MANUAL ...
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Страница 3: ...iii NT4S NT15S NT18S Programmable Terminal Operation Manual Produced March 1999 ...
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Страница 26: ...12 The Terminals of the NT Series Section 1 2 1 2 4 1 2 NT4S SF122B E 1 2 4 1 3 NT4S SF123B E ...
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Страница 37: ...23 The Terminals of the NT Series Section 1 4 1 4 1 3 NT4S SF123B E 1 4 1 4 NT15S SF121B E ...
Страница 54: ...40 The Terminals of the NT Series Section 1 7 1 7 6 3 ASCII Character Set Table ...
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Страница 232: ...Authorized Distributor Cat No V056 E1 1 Note Specifications subject to change without notice Printed in the Netherlands ...