NCR 7870 Scanner User Manual


 
7-50 Chapter 7: Programming
With 497-0301951 and higher, the default is 10 milliseconds minimum
delay between messages.
Messages can be delayed by the following times.
0 for no delay
1 for a 10 ms delay
2 for a 50 ms delay
Scanner or Scanner/Scale Format
The Scanner or Scanner/Scale Format option permits you to force the
data format to either scanner only format or scanner/scale format to
accommodate the host terminal. For example, in a dual-cable system,
the scanner data and the scale data are normally sent over separate
cables in a format designed for each device (scanner or scale). In some
circumstances a host terminal may not be able to handle the normal
format sent to it. In that case, selecting one of these options permits
you to use the other format.
The Model Number option in the Scale Parameters section overrides
this option. If you program this option, do it after the other parameter
or return here and change it again. This option effects the address and
function code in the message, but not the BCC. The choices for this
option are as follows.
4 for Scanner Only format
5 for Scanner/Scale format
The normal (default) format for scanner only tag data messages is as
follows.
Scanner-Only Tag Data
Message Format
Prefix Byte Label Identifier Tag Data PPD Terminator Byte BCC Byte
16564
Shading indicates optional information.