RS-232 Features

RS-232 Host Echo

NOTE

When enabled, this feature passes all data through the scanner to the host as it comes in. This feature is used for applications where “daisy chaining” of RS-232 devices onto the same cable is necessary. If, for example, one of the devices in the chain is a terminal where someone is entering data while another person is simultaneously scanning a bar code requiring transmis- sion to the host, the scanner will wait for the RS-232 channel to be quiet for a specified period of time (set via RS-232 Host Echo Quiet Interval).

The scanner can be set to observe this delay before sending its data in order to avoid RS-232 transmission conflicts.

When RS-232 Host Echo is enabled, the following features are ignored: RS- 232 Software Flow Control and RS-232 ACK NAK Enable as well as all other ACK/ NAK related operations, plus processing of RS-232 host com- mands.

To enable/disable this feature:

1.Scan the SWITCH bar code.

2.Scan either the enable or disable bar code below. You’ll need to cover any unused bar codes on this and the facing page to ensure that the scanner reads only the bar code you intend to scan.

3.Complete the programming sequence by scanning the SWITCH bar code.

RS-232 HOST ECHO = DISABLE

RS-232 HOST ECHO = ENABLE

Product Reference Guide

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Datalogic Scanning 9500, 9504 manual RS-232 Host Echo