Serial Links - Loma IQ2 Service Manual

SERIAL LINKS

The serial link menu position operates in conjunction with an optional board that
supports a single RS232 (hardware handshaking), RS422 and 20mA current
loop (software handshaking Xon-Xoff) and the reports/logs package.
Handshaking is the method by which the source device and the receiving device
control the flow of data.
Only one system may be used at any time, system selection is by fitting a
combination of links in JP1, JP4 & JP5 found on the optional board. If the 20mA
current loop system is chosen then further links are required in LK1 & 2.
The detector can be configured to run Reports, LomaLink, or LomaNet
depending upon the link type chosen.
Following is a guide to their usage and information on how to configure the
hardware aspect of the links. For information on setting the drive protocols
required please refer to your User Manual supplied with your detector.
To be able to connect any external devices to these links, your detector will
require an additional
with your detector. Please contact your local Group Service Centre with your
requirements.
If the link is used to drive LomaLink then reference to the Serial
Communications Handbook Loma is required to enable the correct interface
protocol to be written. This can be emailed to you upon request.
Link selection, 20mA configuration settings and JP2 header and detector
chassis connector wiring is given in
in this section.
27
The serial link board and how to fit it is shown in
in this section.
page 29
RS232 for devices no more than 25 metres (82 feet) from the detector.
The link is a 5 wire system supporting hardware handshaking.
If the detector has a LomaNet module fitted then it will be driven from this link.
If the link is to be used with a remote printer it must be mounted to the detector
conveyor system and grounded to the detector control box.
If the environment in which the printer is to be fitted is hostile, then some form of
environmental protection will be required for the chosen printer.
The link will only support simple dot matrix type printers such as the Epson LX
range, but can be used with single sheet feeder attachments.
Module 7026
serial link loom assembly
Figures 8
Configuration and Set up Information
, unless initially supplied
on page 30
, 9
on page 27 on page 27
Figures 11
on page 29
& 10
on page
and 12
on
5-25