Microscan MS-4X Manual de usuario descargar pdf (Pagina 294)

Appendix P

A-38 MS-880 Industrial Long Range Scanner User’s Manual

Appendices

Appendix P — Multidrop Communications

This appendix describes the rules for setting

up a concentrator or controller to communi-

cate with a scanner in standard Multidrop

protocol.

The diagram to the right shows a typical Multi-

drop network in which 1 to 50 scanners can

communicate with a host via an intermediary

device, a concentrator or a controller.

Configure Your Scanner for Multidrop

1. With the scanner connected to the host, do Retrieve Scanner Settings as in

Step 5 —“Retrieve Scanner Settings” on page 2-6.

2. Select Multidrop in the Protocol configu-

ration menu.

You will see the following message:

Warning. You must change your preamble and pos-

tamble characters so that they are not CR or NULL

This allows data to move through the con-

centrator without interference.

3. Click OK.

4. Next, go to Preamble Characters (still in the Protocol menu) and double-click

on Characters.

5. This will open up an ASCII character table. Select any character other than CR.

For example, select LF.

6. Repeat the above for Postamble.

7. Check the multidrop address. Enter a number from 01 to 50.

8. Right-click in the window and select Save to Scanner and Send and Save.

9. Your scanner is now in multidrop. From here on, you will need to use the concen-

trator to relay commands and data between the scanner or scanners and the host.

10. Next, go to “Connect to Scanner via the Concentrator” on page A-39.

Scanner 01

Scanner 02

Scanner 03

Host

Concentrator

Multidrop ONLY

RS-485 Interface

Polled Protocol

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Microscan MS-4X Manual de usuario Pagina 294