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Chapter 2 Communications

MS-820 Industrial Bar Code Scanner User’s Manual 2-11

2–Communications

Conditions: The conditions for a daisy chain application are

as follows:

1. The master scanner’s trigger must be Serial

or External; the slave scanners’ triggers are

configured for Serial.

2. All scanners are enabled to Daisy Chain

mode.

3. Each scanner’s auxiliary port must be connected to the Host port of

its slave scanner.

4. Each slave scanner in the daisy chain must be set to send its data

no less than 20 mS before its preceding scanner.

5. All but the master scanner must have Postamble enabled and set

to CR (^M) only.

6. All but the master scanner must have their noread messages dis-

abled.

7. If Multilabel is enabled, Multilabel Separator characters must

match in all scanners and Number of Labels must be set to num-

ber large enough to include all the labels it may itself read plus the

number of labels that it will be expected to relay to the host or the

next scanner up the line.

8. Symbology ID enable/disable must be the same in all scanners.

9. All but the master scanner must have their diagnostic warning mes-

sages disabled.

10. Daisy Chain ID Status enable/disable and the number of charac-

ters in Daisy Chain ID must be the same in all scanners.

Master

Host

Slave

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Microscan MS-820 Bedienungsanleitung Seite 35