Method For Connection To The Host - Omron Programmable Terminals NT31 NT31C Setup Manual

Method for Connection to the Host

2-1 Method for Connection to the Host
26
This section describes the methods for connection to the host used with the
NT31/NT31C, and the relationship between the connection method and the
communication method.
NT31/NT31C Communication Ports and Communication Methods
The NT31/NT31C has two communication ports. Their uses are indicated in the
table below.
Communication
Usable Communication Methods
Port
Host link
NT link (1:1)
NT link (1:N)
Serial port A
Memory link
(Support Tool connection)
(bar code reader input function)
Host link
NT link (1:1)
Serial port B
NT link (1:N)
Memory link
* There are two NT Link (1:N) communications rates: standard and high-speed.
Communication Methods That Can Be Used with the Host
The following communication methods can be used with the hosts that can be
connected to the NT31/NT31C.
• RS-232C
• RS-422A
• RS-485
The communication types that are actually supported differ depending on the
host unit. For details, refer to Section 4 Connecting to the Host from the
RS-232C Port and Section 5 Connecting to the Host from the RS-422A/485 Port.
Converting the Communication Type with an RS-232C/RS-422A Convertor
Unit
The following communication type conversions are possible by using an
RS-232C/RS-422A convertor unit (NT-AL001-E, made by OMRON).
• RS-232C ⇔ RS-422A
• RS-232C ⇔ RS-485
*
RS-232C
RS-232C
RS-422A/485
*
(select between RS-232C
and RS-422A/485)
Section 2-1
Communication Type