Rockwell-automation 2711 PANELBUILDER SOFTWARE USER MANUAL Manual de usuario Pagina 330

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The Objects
Chapter 10
10-65
A second string is sent while the first one is displayed. The string is: “This
shows how characters overwrite”.
This
shows
how ng for
characters
Note that any character which was not directly covered by a new character
remained in the display. This feature can be useful for updating portions of
an ASCII display while leaving portions unchanged. If you want to clear
the display, or clear a line in the display, control characters for those
purposes can be embedded in the string.
To properly display the second string shown above, a “clear to end of
display” control sequence, ESC[J, could have been included at the
beginning of the string.
The string would then be: “ESC[J This shows how characters overwrite”,
which would display:
This
shows
how
characters
See the table of control sequences, Table 10.V, and the description of
Invalid Control Sequences which follows it.
Move and Size
An ASCII display object can be any size from one line high by one
character wide, to 24 lines by 80 characters. Moving and sizing the object
is identical to the “Local Message Display”.
ASCII Display String Format
The format of the data string must be as in Table 10.U. Table 10.W lists the
ASCII character set. For more characters, see Appendix E, The Extended
Character Set.
Table 10.U
ASCII
String Format
Bit 15 8 7 0
1st word 1st character 2nd character
2nd word 3rd character 4th character
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