Omron NT31 NT31C manual Method for Connection to the Host

Method for Connection to the Host Section 2-1

2-1 Method for Connection to the Host

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	Communication Type
Port
	Host link
	NT link (1:1)
Serial port A	NT link (1:N)*	RS-232C
	Memory link
	(Support Tool connection)
	(bar code reader input function)
	Host link	RS-232C
Serial port B	NT link (1:1)	RS-422A/485
	NT link (1:N)*	(select between RS-232C
	Memory link	and RS-422A/485)

* 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

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