model 2704 controller installation and operation handbook - Soliton

Input Operators
2704 Controller
11. Chapter 11 Input Operators
11.1. WHAT ARE INPUT OPERATORS
The 2704 controller can have three control loops. Each loop can be independently
configured to the process to be controlled. This has been described in Chapters 9 and 10 for
PID, Cascade, Ratio, Override, Humidity Control, etc. It is also possible to apply custom
linearisation to the inputs of each loop. This is a 16 point straight line linearisation and the
parameters can be made available at Levels 1, 2 and 3 so that scaling can be carried out
during commissioning.
Custom linearisation is achieved under three page headers in the controller.
Also included in this section are parameters which allow you to switch inputs between
different thermocouple types or between a thermocouple and pyrometer when the process is a
high temperature furnace.
The page headers are:
INPUT OPERS (Cust Lin 1
Page)
INPUT OPERS (Cust Lin 2
Page)
INPUT OPERS (Cust Lin 3
Page)
INPUT OPERS (Switch 1
Page)
INPUT OPERS (Monitor 1
Page)
BCD INPUT
These parameters set up the custom linearisation for
input 1
These parameters set up the custom linearisation for
input 2
These parameters set up the custom linearisation for
input 3
These parameters provide switch over between
thermocouple types or pyrometer
Logs maximum and minimum, counts time above
threshold
To select a numerical value from an external BCD
switch
The Input Operators page is only available if Input Operators has been enabled in
configuration level. This is described in the Engineering Handbook, Part No. HA026933.
Note:
In addition to linearising the controller inputs channels, it is equally valid to customise other
sources such as Output Channels. This allows you, for example, to compensate for non linear
control valve characteristics.
11-2 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00