Despatch RAD1-42 -2E with Protocol 3 - Manual (Page 16)

T HEORY OF O PERATION RFD1-42-2E Oven Owner’s Manual
16 Version 1
Copyright © 2012 by Despatch Industries.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and
retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
3.3.1. Optional High Limit Audible Alarm
High Limit audible and visual alarm is a red light and small alarm horn located on the front of the
control panel. The alarm is sounded if a High Limit condition occurs. A switch is provided to
silence the alarm. This alarm has a range of 80dB at 2 ft (0.6 m).
3.3.2. Optional Modbus Communications Hardware
RS485 Modbus communications are wired from the Protocol 3 controller to the DB9 connector
on the side of the oven. A programming manual is included which lists all the messages
recognized by the Protocol 3 controller. This manual is intended for those who will write their
own software. An RS232 to RS485 converter is required between the PC and a single oven. The
manual can also be used with Despatch Protocol Manager software.
Figure 4. Protocol 3 Operator Interface.