Omron NT11S, Operation Manual

Page: 118 / 183

Reference
102
Outline of Host Link / NT Link Operation
Section 5-1
The range of respective area varies with the type of PC. Refer to Appendix H PC
Memory Map (page 160).
Procedure 1. Use the support tool to allocate the PT status control area (PC to PT) to the PC
memory.
2. Create a PC program to write the number of the displayed screen to the
“screen switch setting word” in the PT status control area.
Use a 4-digit BCD (binary-coded decimal) value to set a screen number.
If a screen has been switched by operating the PT status control area (PC to PT),
the contents of the “currently displayed screen word” in the PT status notify area
(PT to PC) also change.
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Screen switching timing
The NT11S screen switches when the contents of the “screen switch setting”
have changed. To re-specify the number of the currently specified screen, first
write the value 0000 to clear the screen before writing the appropriate screen
number.
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Use of the screen switching strobe
Create a program to read the number of the currently displayed screen and to
write the number to the “screen switch setting word” at the leading edge of the
“screen switching strobe” of the PT status notify area. This program enables
screen switching by using the Menu screen on the NT11S and eliminates re-
peated setting of the same screen number. If the screen switching is not
executed on the NT11S, the screen switching strobe does not need to be
checked.
For the screen switching strobe, refer to the “notifying the displayed screen to the
PC” mentioned below.
Example of Display Screen Switching
This example operates the PC switch (bit) to switch the NT11S display screen.
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Support tool settings
Make the following settings with the support tool:
PT status control area: Word 0100
PT status notify area: Word 0110
Screen number to be created: Screen No.2 and No.3