Notification Of Number Of Currently Displayed Screen - Omron NT30C-ST141-E Operation Manual

Outline of Host Link and NT Link Operations
Example Application of Screen Switching

5-1-6 Notification of Number of Currently Displayed Screen

In this example, if the temperature in a water tank rises above the upper limit, a bit
is turned ON, and the warning screen that corresponds to the bit is displayed.
S NT-series Support Tool Settings
The following settings are made using the NT-series Support Tool.
Bit memory table entry No. 0
Allocated bit . . . . . . . . . .
Function . . . . . . . . . . . . . .
Created screen No.
Proc.4 Water Tank Temp.
OVERHEATING
Urgent: Check the thermostat!
S PC Program
Ladder programming to control the NT30/30C is not required.
S Program Operation
When IR/CIO 001000 comes ON, the NT30/30C displays screen No. 1000.
The following describes the processing to ascertain the number of the currently
displayed screen of the NT30/30C.
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 NT30/30C notifies the following to PT Status
Notify Area (PT to PC) allocated to the PC.
Screen switch notification: Screen switch strobe flag of the PT status word
New screen number:
000100 (input bit that comes ON when the
temperature of the water tank rises above the
upper limit)
Screen switching (screen No. 1000)
. . . . Screen No. 1000
Return
Currently displayed screen word
Section 5-1
199