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Confiouration
5-l
5
5.1
5.2
5.3
Configuration
General
Configuration
of the controller
follows three stages:
n
Definition
of the control
problem.
n
Selection
of the inputs and outputs.
n
Selection
of the required
functions
(FCODE's).
The controller
is delivered
with a basic configuration,
permitting
it to
be used as a conventional
PID controller.
All function
codes have
been assigned
the default
values
listed in the FCODE
tables.
Definition
of the Control
Problem
Before beginning
to look at the controller
configuration,
the control
application
must be carefully
defined.
n
Which
process
is to be controlled?
n
What is to be achieved?
n
Are alarm function
needed?
n
Which
input and output signals
(external
components)
are
available
and what are their signal ranges?
A control
system diagram
should
preferably
be drawn up in the form
of a block diagram
which will answer the questions
posed above.
Selection
of Inputs
and Outputs
The controller
has:
H
Four analog
inputs: All,
A12, Al3, Al4
H
Two analog
outputs:
A01 , A02
n
Four digital inputs:
Dll, Dl2, Dl3, D14
n
Two optically-isolated
digital
outputs
for mode indication:
24V/20
mA: DOI,
DO2
n
Four digital
outputs
for alarms
and discrete
output control:
D03,
D04,
D05,
DO6
May 1991
UM6.1:DF'R900:9102
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