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Touch Switches
Section 4-7
It is possible to specify whether the touch switch will be lit continuously or
flash when the bit allocated to it is turned ON by the PLC/Host.
• Presence/Absence of a Guide Display
A guide display message can be displayed at a touch switch location.
4-7-2
Screen Switching Function
The NT20 has a function that allows screens to be switched by pressing touch
switches on its screen, rather than by designation from the PLC/Host. This
function is called the “standalone function”.
The screen number of the screen that will be displayed when a touch switch is
pressed is set for that touch switch when the screen data is created using the
Support Tool.
If the touch switch is pressed during operation, the screen whose number was
designated will be displayed. Simultaneously, the PLC/Host will be notified of
the screen number of the screen selected for display.
To set a screen number for a touch switch, use “Touch SW”, “Bit specification”
and “Screen switch” of the Support Tool.
Note
Only one screen number can be set for one touch switch within one screen (or
within one overlapping screen).
4-7-3
System Key Functions
The NT20 allows the allocation of “system key” functions to touch switches.
The system key functions can then be used during operation by pressing the
touch switches to which they have been allocated.
For example, if, when a screen for which buzzer sounding has been set is dis-
played, a
touch switch is also displayed, the buzzer can be stopped by
pressing this touch switch.
To set a system key function for a touch switch, use “Touch SW”, “Bit specifi-
cation” and “Numeric key” of the Support Tool.
Allocation of System Key
Functions
The system key functions are allocated to touch switch numbers 227 to 230
and 255, as shown below. When a touch switch with one of these numbers is
displayed on the screen, it has the same function as the corresponding sys-
tem key.
"Screen #5" set for touch switch 1
To next screen
Screen #5
Touch switch
pressed once
System Key
Key Symbol
Touch Switch No.
System menu display
227
228
229
[Buzzer stop]
230
[ENT]
255
MENU
Summary of Contents for NT20
Page 1: ...Programmable Terminal Cat No V091 E1 01 NT20 USER S MANUAL ...
Page 2: ...NT series Programmable Terminal User s Manual Produced March 2007 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 15: ...xvi ...
Page 21: ...xxii EC Directives 6 ...
Page 37: ...16 Before Operating Section 1 6 ...
Page 153: ...132 Transferring the Resource Data Section 3 11 ...
Page 185: ...164 Numeral Setting Section 4 8 ...
Page 267: ...246 Key to Programs Section 6 8 ...
Page 281: ...260 Specifications Appendix A ...
Page 285: ...264 Transporting and Storing PTs Appendix C ...
Page 303: ...282 Function Restrictions Depending on the Support Tool Appendix I ...
Page 307: ...286 Index ...
Page 309: ...288 Revision History ...