Allen-Bradley InView Marquee 2706-P42, User Manual

Page: 56 / 212

Publication 2706-UM016-A-EN-P - June 2002
4-14 DF1 Point-to-Point Communication
In Rung 1 the source Dint_file[0] is the number of the message to be
triggered in the Inview display. It gets converted into a string type and
then concatenated with string_tag[3] (which would be the ^T or ^V, in
this example $14 = ^T). In Rung 2 string_tag[2] is concatenated with
string_tag[5] (which would be the ^M, $r = ^M). In rung 3 the
string_tag[0] data is copied to sint_file[2]. It is copied to sint_file[2]
because the message being sent out to the Inview display, needs to
have a one word buffer, in order for the Inview to read the message.
Therefore in rung 4 the message being sent out is an array starting
with sint_file[0]. This makes sint_file[0] and sint_file[1] as the buffer.
The message to be triggered as stated above is kept in Dint_file[0].
This is shown by locating the file type under controller tags heading.
1
0
String Concatenate
Source A string_tag[3]
'$14'
Source B string_tag[4]
'2070'
Dest string_tag[2]
'$142070'
CONCAT
2 String Concatenate
Source A string_tag[2]
'$142070'
Source B string_tag[5]
'$r'
Dest string_tag[0]
'$142070$r'
CONCAT
3 Copy File
Source string_tag[0].DATA[0]
Dest sint_file[2]
Length 10
COP
4
Timer[1].DN
EN
DN
ER
Type - PLC2 Unprotected Write
Message Control message_tag ...
MSG
DINT to String
Source DINT_file[0]
2065
Dest string_tag[4]
'2070'
DTOS