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SECTION 5
How to Use the Host Link/NT Link
This Section describes in concrete terms how to use the Host link/NT link communications with the NT20.
5-1
Overview of Direct Connection Operations . . . . . . . . . . . . . . . . . . . . . . . . . .
166
5-1-1
Equipment and Settings Used in This Section . . . . . . . . . . . . . . . . .
166
5-1-2
Allocatable Bits and Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
166
5-1-3
NT20 Status Control and Notification to PLC . . . . . . . . . . . . . . . . .
167
5-1-4
Switching the Screen Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
172
5-1-5
Notifying the PLC of the Display Screen
(to Display the Number of Currently Displayed Screen) . . . . . . . . .
174
5-2
Memory Tables and Bar Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
177
5-2-1
Displaying the Contents of Allocated Words of Memory Table Entries
180
5-2-2
Changing Displayed Numerals or Character Strings
(Changing the Contents of Allocated Words ... Direct Specification)
182
5-2-3
Changing Displayed Numerical Values or Character Strings
(Changing the Contents of Allocated Words ... Indirect Specification)
184
5-2-4
Copying Memory Table Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . .
186
5-2-5
Upgrading Bar Graphs (Changing the Contents of Allocated Words)
189
5-3
Lamps, Touch Switches, Numeral Setting . . . . . . . . . . . . . . . . . . . . . . . . . . .
191
5-3-1
Allocation Bits and Display of Lamps . . . . . . . . . . . . . . . . . . . . . . .
191
5-3-2
Turning ON (Lit) and OFF (Unlit) the Lamps
(Changing the Contents of Allocated Bits). . . . . . . . . . . . . . . . . . . .
192
5-3-3
Allocated Bits and Display of Touch Switches . . . . . . . . . . . . . . . .
193
5-3-4
Lit (Flashing) and Unlit Touch Switch Status
(Changing the Status of Allocated Bits) . . . . . . . . . . . . . . . . . . . . . .
195
5-3-5
Notifying the Host That a Switch Has Been Pressed
(Determining Touch Switch Status) . . . . . . . . . . . . . . . . . . . . . . . . .
196
5-3-6
Notification of Numbers to the PLC. . . . . . . . . . . . . . . . . . . . . . . . .
199
5-4
NT20 Status Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
203
5-4-1
Controllable NT20 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
203
5-4-2
How to Control NT20 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . .
205
5-5
Notification of the Operating Status to the PLC
(Determining the NT20 Operating Status) . . . . . . . . . . . . . . . . . . . . . . . . . . .
208
5-5-1
Ascertainable NT20 Status (Notified Operating Status) . . . . . . . . .
208
5-5-2
Reading the NT20 Operating Status . . . . . . . . . . . . . . . . . . . . . . . . .
209
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 ...