V020-E3-2 Omron, V020-E3-2 Datasheet - Page 176

• Manufacturer Part Number: V020-E3-2
• Description: Publications, Books
• Manufacturer: Omron

Specifications of V020-E3-2

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5-1-5
160
Overview of Direct Connection Operations
Notifying the Display Screen to the PC
(To Display the Number of Currently Displayed Screen)
The following describes the processing to display the number of currently dis-
played screen of the NT20S.
This processing reads the data from the PC status notify area.
To indicate that the screen has switched, use the screen switch strobe flag.
To display the number of the currently displayed screen, use the currently dis-
played screen word.
When the screen has switched, the NT20S notifies the following to PT status notify
area (PT to PC) allocated to the PC.
By reading the currently displayed screen word when the screen switch strobe flag
has turned ON, the number of the currently displayed screen on the NT20S is dis-
played.
[Currently displayed screen] and [PT status] words in the PT status notify
area
Use a 4-digit BCD (binary-coded decimal) value to set a screen number.
The screen switch strobe bit reverts to OFF (0) after this is notified to the PC.
Screen switch notification:
New screen number:
Word
m
m+2
displayed
Currently
screen
15 1413 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit
Screen number: 0001 to 0500
15 14 13 12 11 10
NT20S
--
Screen number (4-digit BCD)
PT status
0
0
--
0
0
Screen switch strobe flag of the PT status word
Currently displayed screen word
9
0
PT status notify area
Content upgrade memory table
0
PC
Currently displayed screen
PT status
8
0
Bit
Screen switch setting
PT status
Screen switch strobe
Section 5-1
Screen number
Screen switch
strobe flag