Overview Of Direct Connection Operations; Equipment And Settings Used In This Section; Allocatable Bits And Words - Omron NT20S-ST121B-EV3 User Manual

Overview of Direct Connection Operations

5-1

Overview of Direct Connection Operations

5-1-1

Equipment and Settings Used in This Section

5-1-2

Allocatable Bits and Words

166
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.
The following equipment and settings are used in the examples in this section:
Equipment PT:
PLC:
Support Tool:
Support Tool Settings
PT Model:
PLC Vendor:
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
Symbol
Area Name
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
NT20-ST121-E
CQM1H
NT Support Tool for Windows Ver. 4.8
NT20
OMRON
CS/CJ Series PLCs
Allocated
Bit
Numeral Character
❍
❍
❍
❍
×
×
×
×
❍
×
❍
❍
❍
❍: OK
Section 5-1
Allocated Word
String
❍ ❍
❍ ❍
❍ ❍
❍ ❍
× ×
× ×
❍ ❍
× ×
❍ ❍
❍ ❍
❍ ❍
: 1 word only × : NG