Introduction 2604 Controller
1-2 User Guide Part No HA026491 Issue 3.0 Apr-02
1. Chapter 1 INTRODUCTION
Thank you for selecting the 2604 High Performance Programmer/Controller.
This controller can be supplied or can be fully configured to be process specific.
It is important to note, therefore, that the actual displays shown in this guide
may not be identical to those shown on your controller.
This guide, therefore, is intended to describe the principle of operation and
installation of the controller, and is intended as a ‘Getting Started Guide’.
A detailed Engineering Handbook is also available, part no. HA026761, for those wishing to
configure and commission the controller.
1.1. WHAT IS 2604
The 2604 is a modular, fully configurable, high
accuracy, high stability temperature and process
controller which is available in a single, dual or
three loop format.
It is supplied in accordance with an ordering code
which can be found printed on a label on the side of
the instrument case. A description of the order
code is given in Appendix A of this guide and
should be checked with that shown on the label.
It has a dual 7-segment display of process value and
setpoint with a LCD panel for display of
information and user defined messages.. The user
interface is menu driven via the display and seven
front panel keys.
Figure 1-1: General View of 2704 Controller
Features include:
•Advanced ramp/dwell programmer with storage of up to 50 programs.
•Application specific controllers such as Carbon Potential, Humidity and Melt Pressure
•A wide variety of inputs which can be configured, including thermocouples, Pt100
resistance thermometers and high level process inputs.
•Each loop can be defined to be PID, On/Off or motorised valve position and can control
using a variety of strategies including single, cascade, override and ratio control.
•PID control outputs can be relay, logic, triac or dc with motorised valve position outputs
being relay triac or logic.
•Auto tuning and PID gain scheduling are available to simplify commissioning and
optimise the process
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