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Overview of Direct Connection Operations
Section 5-1
5-1
Overview of Direct Connection Operations
This section explains allocated bits and words, control of the NT20 and PLC
notification methods, and the actual procedures used for switching screens,
thereby providing the basic information required to use the NT20-ST121-E
host link, or NT link.
5-1-1
Equipment and Settings Used in This Section
The following equipment and settings are used in the examples in this section:
Equipment
PT:
NT20-ST121-E
PLC:
CQM1H
Support Tool:
NT Support Tool for Windows Ver. 4.8
Support Tool Settings
PT Model:
NT20
PLC Vendor:
OMRON
5-1-2
Allocatable Bits and Words
When the host link/NT link is used, the following bits and words are allocated
to the PLC and used for the NT20 operation. The range of respective area
varies with the type of PLC.
The allocations must be made without exceeding respective area range.
OMRON PLCs
❍
: OK
: 1 word only
×
: NG
Symbol
CS/CJ Series PLCs
Area Name
Allocated
Bit
Allocated Word
Numeral Character
String
None
CIO Area
❍
❍
❍
H
HR Area
❍
❍
❍
A
AR Area
❍
❍
❍
LR
LR Area (See note 1.)
❍
❍
❍
T
TC Area
Timer PVs
×
TU
TC Area
Timer Completion Flags
×
×
×
C
TC area,
Counter PVs
×
CU
TC area,
Counter Completion Flags
×
×
×
W
WR
❍
❍
❍
TK
Task Flags
×
×
×
D
DM Area
❍
❍
❍
E
EM Area
Current bank
❍
❍
❍
E0_ to EC_
EM Area
EM banks 0 to C
❍
❍
❍
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 ...