model 2704 controller installation and operation handbook - Soliton

2704 Controller Introduction
1.2. WHAT IS 2704
The 2704 is a high accuracy, high stability temperature and process controller which is
available in a single, dual or three loop format. It has a 120 x 160 pixel electroluminescent
used to show all process information. The user interface is menu driven via the display and
seven front panel keys.
When the 2704 is configured as a programmer it
provides advanced programming facilities such as:
• storage of up to 50 programs.
• up to three variables can be profiled in each
program, or one profile can be assigned to run in
more than one loop.
• up to sixteen event outputs can be assigned to
each program.
Special machine controllers can be created by
connecting analogue and digital parameters to the
control loops, either directly or by using a selection
of mathematical and logical functions.
Figure 1-1: General View of 2704 Controller
Other features include:
• A wide variety of inputs which can be configured, including thermocouples, Pt100
resistance thermometers and high level process inputs.
• Direct connection of zirconia oxygen probes is also supported for use in heat treatment
furnaces and ceramic kiln applications.
• 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
Configuration of the controller is explained in a separate Engineering Manual, Part No.
HA026933. Configuration is achieved either via the front panel operator interface or by
using ‘iTools’ - a configuration package which runs under the Windows 95, or NT operating
systems.
Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 1-3