Omron NT21 Reference Manual page 45

Communications with the Host
Notification from the PT
to the PC
Functions of Display Elements
System control:
Buzzer ON/OFF, display/no display status, screen printing, window open/
close status, and other PT status
Data in the PT is sent to a PC when, for example, a touch switch is pressed. The
following 5 types of data are sent to a PC.
PT status, screen number of currently displayed screen
The status of touch switch inputs
Numeric values and character string input with the numeral/character string
setting function using touch switches or a bar code reader.
Changes in memory table entries after copying between memory table entries,
etc.
Numerical results of calculations from the mathematical function
Lamps (page 112)
Allocated: Bit
PT
Lamp #1 (Bit 000100)
Lit
Unlit
Lamp #2 (Bit 000101)
The PC's bit status is displayed by the lamp at the PT.
Normal (standard) lamps come on (flash) when the PC's bit status (lamp bit) is
ON (1), and go off when it is OFF (0).
With image/library lamps, the displayed image or library data can be switched in
accordance with the ON (1)/OFF (0) status of PC bits (lamp bits).
Touch Switches (page 119)
Allocated: Bit (lamp bit, notification bit, or interlock bit)
Touch switch #12
Bit 009012
The lamp comes on (flashes) when the PC's bit (lamp bit) is ON (1) and goes
OFF when it is OFF (0). When the touch switch is pressed, the PC's notification
bit comes ON (1) or goes OFF (0).
The interlock function can also be used. An operation is enabled only while the
corresponding interlock bit allocated in the PC is ON.
PC
PT
Bit 009012: ON
Section 1-4
Switch 1: ON (Bit 000100)
Switch 2: OFF (Bit 000101)
PC
1
009012
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