31
P-n2
Input type:
The Input Type is the type of sensor to be used
with the controller in sensing the process variable. The
Input Type must be correctly programmed into the con-
troller in order for the controller to perform with the
selected sensor type. There are two input type models
available. One model accepts J, K, R, B, S, T, E, N thermo-
couples and RTDs (Pt100), and the other model accepts
1-5/0-5V DC and 4-20/0-20mA DC signals.
The current/voltage model comes with a 250
Ω
precision
resistor. Wired directly to the controller, it would convert
a current signal into a voltage signal. There is no need to
use the resistor if a voltage signal is applied directly.
After the appropriate physical changes have been made,
the controller still needs the correct code for the input
type to be used. See page 32.
P-dF
Input Filter Constant:
The Input Filter is used to filter out
the quick changes that occur to the process variable in a
dynamic or quick responding application that might cause
erratic control. By slowing down the response time, the
controller averages out the peaks and valleys of a dynam-
ic system which, in turn, stabilizes the control. The digital
filter also aids the controller in controlling processes
where the electrical noise is affecting the input signal.
The larger the value entered, the more the filter added
and the slower the controller reacts to process variable
changes. The smaller the value entered, the less the filter
added and the quicker the controller reacts to process
variable changes. Enter as small a value as possible at
which the controller maintains accurate and stable
control.
Setting range: 0.0-900.0 secs
