For actual tuning, proceed by pushing the PARAM DISPLAY key.
At this display, you must decide if you want to tune the controller or
return to the OPERATOR loop. Tuning is required on all initial
installations. If the NO key is pressed, the display goes to the "END OF
TUNE" display. If the YES key is pressed, the following displays appear
For an ON/OFF primary output ONLY, select a DEADBAND of 0.25, 0.50, or
1.00% of Span using the arrow keys. Factory preset at 0.25% of Span.
Push the PARAM DISPLAY key to advance.
This display appears ONLY when the primary output is set for Time
Proportional Control (TPR). Set a cycle time (CYCTIME) from 1 to 60
seconds using the arrow keys-factory preset at 15 seconds. Push PARAM
DISPLAY key to advance.
The next display will vary depending on the controller model. Controllers without self tuning (Models 2000, 2001 and 2002)
follow the manual tuning procedure in Section 4.5. Controllers with self tuning (Models 2003 and 2004) follow the
procedure in Section 4.4 below. All controllers with a secondary output must have the secondary output tuned manually.
4.4 SELF TUNE PROGRAM (Models 2003 and 2004 only)
6 This is the first display in the SELF TUNE program. Push the YES key for
SELF TUNE. Push the NO key if manual tuning of the primary output is
desired and proceed to Section 4.5.
You must next choose the desired closed loop response of the system: FAST or SLOW. Different tuning rules are
applied by SELF TUNE according to your choice.
Indicate whether you want your system to be a FAST or
SLOW responding system. Push the NO key to switch
between these two displays. Push the YES key to select
the desired response.
Select FAST RESPONSE for systems where a possible overshoot will not present a hazard. Select SLOW RESPONSE
where potential overshoot is not acceptable. Your decision can be changed at any later time without retuning by returning
to these displays in the TUNE loop and selecting the other response.
Push the NO key if you dont want to start the SELF TUNE procedure. The
PID constants will then be calculated according to the last process model
and your choice of response. This allows you to change your choice of
FAST or SLOW tuning without repeating the self tuning program.
Push the YES key to initiate the SELF TUNE program.
The yellow TUN light will flash, and the display indicates that you are
in SELF TUNE mode. After a short delay (15 secs), Output 1 will turn ON,
and the controller will start to analyze the system.
ECLIPSE INSTRUMENTATION DIVISION