Keyence N-400 User Manual download pdf (Page 96)

Chapter 5 Multi-Head Mode Control Procedure

5.1 Multi-head Mode

5.1.1 Controlling multi-head mode

If the bar code position on a product is unknown, or if bar codes are printed in

several positions, the bar code data cannot be read with a single bar code reader.

In such cases, several bar code readers need to be mounted in various positions or

at various angles.

When the N-400 is used in multi-head mode, the host computer can control several

BL series like it would be a single unit.

The procedures for controlling the N-400 using the host computer are classified

into the following three methods:

• Data communication: Used to send bar code data read by the BL series to the

host computer.

• Command communication to the BL series: Used to send a command to the BL

series.

• Command communication to the N-400: Used to control the N-400 directly or

change the settings of the N-400.

* All of the above communication methods use ASCII codes.

The procedures for sending a command to the BL series or the N-400 are the

same as for multi-drop link mode. For details, see the descriptions on multi-drop

link mode.

N-400

RS-232C

RS-485

Host PC

Sensor for

trigger input

N-48

BL-U1

The host

computer can

control several BL

series like it would

be a single unit.

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Keyence N-400 User Manual Page 96