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5-1
Section
Connecting to the Host’s RS-422A/485 Port
85
In the following table, the relevant word addresses allocated in the DM Area and
settings are shown.
Allocated DM word
Value
Settings
Port 2
Value
Settings
DM32010
8200
1:N NT Link mode
DM32011
000A
Communications baud rate (high-speed)
DM32016
000
j
j
= The largest model number of the
connected PTs (0 to 7)
For example, when connecting PTs with model numbers 3, 4, 5, and 6 to port 2,
set DM 32010 to 8200 Hex, DM 32011 to 000A Hex, and DM 32016 to 0006 Hex.
With the memory link method, the connection can be made to a personal com-
puter or FA computer equipped with RS-422A.
When connecting to the host with the memory link method, it is necessary to
create a program for the memory link at the host.
The communication conditions that can be used with the memory link method
are listed in the following table. For the host (a personal computer, an FA com-
puter, etc.), its setting should be compatible to one of the communication condi-
tions listed in the following table. Set the same communication conditions at the
NT21 by the memory switch. (page 132).
Item
Setting at Host
I/O port
RS-422A
Baud rate
1,200, 2,400, 4,800, 9,600, 19,200, or 38,400 bps.
Data bits
7 bits, 8 bits
Stop bits
1 bit, 2 bits
Parity
None, even, odd
Flow control
None, XON/XOFF
5-1-2 Direct 1:1 Connection to the Host’s RS-422A
This section explains how to connect the NT21’s RS-232C port with the host’s
RS-422A port through a Link Adapter.
A Link Adapter (NT-AL001 or NS-AL002) is required to convert communications
methods between the RS-232C and RS-422A formats.
Connecting the NT21 to the Link Adapter (RS-232C)
Link Adapter
(NT-AL001 or
NS-AL002)
RS-232C
(2 m max.)
NT21
Host
Compatible Cables with Attached Connectors:
XW2Z-070T-1
(9-pin to 9-pin, 0.7 m)
XW2Z-200T-1
(9-pin to 9-pin, 2 m)
6
5
9
1
6
5
9
1
Shield
Abbreviation
FG
–
SD
RD
RS
CS
+5V
–
–
SG
Pin number
Connector
hood
1
2
3
4
5
6
7
8
9
(9-pin type)
Link Adapter
NT21
RS-232C
connector
RS-232C
connector
Pin number
Connector
hood
1
2
3
4
5
6
7
8
9
Abbreviation
FG
–
SD
RD
RS
CS
+5V
–
–
SG
(9-pin type)
When using the Memory
Link Method
Содержание NT21
Страница 1: ...Cat No V068 E1 01 Programmable Terminal NT21 Setup Manual ...
Страница 2: ...NT21 Programmable Terminal Setup Manual Produced October 2001 ...
Страница 5: ...iv ...
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Страница 222: ...Cat No V068 E1 01 Note Specifications subject to change without notice Printed in Japan Authorized Distributor ...