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Touch Switches
Section 4-7
4-7-1
Functions of Touch Switches
Touch switches are created using rectangular elements measuring 19 dots
horizontally by 19 dots vertically. A touch switch can comprise more than one
touch switch element. Up to 72 touch switches (12 horizontally x 6 vertically)
can be registered on one screen.
• Functions of Touch Switches
Touch switches can have the following functions:
• PLC notification function:
Host link/NT link/C200H direct communications (page 196)
RS-232C (NT20-ST128) (page 224)
• Screen switch function (page 154)
• System key function (page 154)
• Numeral setting function:
Host link/NT link/C200H direct communications (page 199)
RS-232C (NT20-ST128) (page 224)
Touch Switch Attributes
The following attributes can be set for touch switches.
• Display Frame
The area that will respond as a touch switch is displayed in the form of a
frame, as shown in the table below. One of three types of frame - standard,
3-D, and none - can be selected.
If “none” is selected, only the touch switch’s guide display message (or
nothing, if there is none) are displayed until a “light” or “flash” designation
is sent from the PLC/Host or the touch switch is pressed.
• Inverse Display on Input
It is possible to set a touch switch so that its display will be inverted when
it is pressed.
• Lighting and Flashing
19 dots
19 dots
PLC
When the touch switch is
pressed, bit information
is sent to the PLC.
(Host link/NT link)
A touch switch can comprise more
than one touch switch element.
Host
When the touch switch is
pressed, the touch switch
number or bit information is sent
to the Host (RS-232C).
Type of Display Frame
Switch OFF
Switch ON
Standard
3-D
None
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 ...