8
Method for Connection to the Host
Section 1-3
1-3
Method for Connection to the Host
This section describes the methods for connection to the host used with the
NT20, and the relationship between the connection method and the communi-
cations method.
NT20 Communications Ports and Communications Methods
The NT20 has two communications ports. Their uses are indicated in the
table below.
Note
There are two 1:N NT Link communications rates: standard and high-speed.
Converting Communications Type with the RS-232C/RS-422A Link
Adapter and RS-422A Converter
An OMRON NT-AL001 Link Adapter or CJ1W-CIF11 RS-422A Converter can
be used convert from RS-232C communications to either RS-422A or RS-
485.
• RS-232C
⇔
RS-422A
•
RS-232C
⇔
RS-485
There are two models of Link Adapter/RS-422A Converter are available. They
provide different features:
• NT-AL001 Link Adapter
The RS-232C port is insulated from the RS-422A/485 terminals. An RS-
232C cable (2 m max.) can be connected to either serial port A or B on
the NT20.
• CJ1W-CIF11 RS-422A Converter
The RS-232C port is
not
insulated from the RS-422A/485 terminals. The
CJ1W-CIF11 RS-422A Converter can be connected to either serial port A
or B on the NT20.
• Communications Distance
Use the NT-AL001 if the communications distance exceeds 50 m.
Communications
Port
Usable Communications
Methods
Communications
Serial port A
Host Link
1:1 NT Link
1:N NT Link (See note.)
RS-232C (command control) (NT-
20-ST128)
(NT Support Tool connection)
RS-232C
Serial port B
Host Link
1:1 NT Link
1:N NT Link (See note.)
RS-232C (command control) (NT-
20-ST128)
RS-232C
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 ...