Red Lion TCU - Manual (Page 30)

CONFIGURATION PARAMETER MODULES
Accessible from the unprotected parameter mode, the configuration
parameter modules allow the operator access to the controller’s fundamental
set-up parameters. There are nine possible configuration stages that can be
accessed. At the configuration stage access point “CNFP”, the operator uses
the UP & DOWN arrow buttons to select the desired configuration parameter
module. Press the PAR button to enter the module where the settings can be
viewed or modified. The PAR button is used to scroll through the parameters
and the UP and DOWN buttons are used to modify the parameter value. The
PAR button enters the desired choice, advancing to the next parameter. The
operator can press the DSP button to exit (escape) without modifying the
parameter. The unit returns to the normal display mode. After the parameters
in a module are viewed or modified, the unit returns to the configuration
access point, allowing access to other modules.
Input Module (1- In)
Th e co n t ro l l e r h a s s e v e ral i n p u t s e t -u p p a ramet e rs t h a t mu s t b e
programmed prior to setting any other controller parameters.
Input Type (type)
Select from the list of various thermocouple and RTD sensors. Be sure to
set the internal input select jumper to the appropriate position (TC or RTD,
see
Select Input Sensor Type , page 7, or the label on outside of case for
location of jumper).
The following is a list of the possible sensors:
tc-t - Type T TC
tc-E - Type E TC
tc-J - Type J TC
tc-k - Type K TC
tc-r - Type R TC
tc-S - Type S TC
tc-B - Type B TC
tc-N - Type N TC
LIN - Linear mV display
r385 - 385 curve RTD
r392 - 392 curve RTD
rLIN - Linear ohms display
Temperature Scale (SCAL)
Select either degrees Fahrenheit (F) or degrees Celsius (C). If changed, be
sure to check All parameters .
Temperature Resolution (dCPt)
Select either 1 or 0.1 degree resolution. If changed, be sure to check All
parameters.
Input Signal Filter and Display Update Rate (FLtr)
Select the relative degree of input signal filtering and display update rate.
The filter is an adaptive digital filter that discriminates between measurement
noise and actual process changes. Therefore, the influence on step response
time is minimal. If the signal is varying too greatly due to measurement noise,
increase the filter value. Additionally, with large derivative times, control
action may be too unstable for accurate control. Increase the filter value.
Conversely, if the fastest controller response is desired, decrease the filter
value.
The Auto-tune procedure sets the filter value appropriate to the process
characteristics. Also see Output Power Dampening parameter (OPdP), page
26, for filtering the output.
Fltr- 0 to 4
0 = least input filtering
3 = most input filtering
4 = most input filtering and slower (2/sec) display update rate
(outputs update at 10/sec rate)
22