4.6 THE POINTERS
To simplify tuning of the controller, special logic called POINTERS has been included that allows you to jump back and
forth between TUNE displays and OPERATOR displays quickly and efficiently.
To operate the pointers, the controller must be in TUNE mode i.e., TUN indicator light must be "ON". When in the TUNE
mode, pressing the RETURN key once followed by the PARAM DISPLAY key will call up and display the OPERATOR loop
in programmed order. Pressing the RETURN key again will jump to the TUNE loop and the DISPLAY key will scroll
through the TUNE displays.
It is possible to jump back and forth between the TUNE and OPERATOR loops by pressing the RETURN key.
For example: In TUN loop, the display can be advanced to RESET 1 using the PARAM DISPLAY key. By pressing the
RETURN key and then the PARAM DISPLAY key, OUTPUT1 can be displayed. You can press the RETURN key to see
and change RESET1 and then press RETURN again to observe the OUTPUT1 response to the new RESET setting. You
can go back and forth between these two displays by touching the RETURN key for quick and efficient tuning.
4.7 MANUALLY TUNING A THREE MODE (PID) CONTROLLER
The controller is capable of exceptional control stability when properly tuned and used. You can achieve the fastest
response time and smallest overshoot by following these instructions carefully. The information for tuning this three mode
controller may be different from other controller tuning procedures.
After the controller is installed and wired:
Apply power to controller
Disable the control outputs by pressing the STOP key (Models 2000, 2001 and 2003) or MANUAL key (Models 2002
and 2004). The "MAN" indicator will flash.
Enter the TUNE loop by pushing TUNE-LAST-YES keys in sequence. (The TUN indicator will illuminate.
Press PARAM DISPLAY key to advance the TUNE program to "TUNE OUTPUTS".
Press YES key. For time proportional primary output, CYCTIME1 will appear. Enter the following value:
CYCTIME1 ---------------------5 SEC
(a smaller cycle time may be required for systems
with an extremely fast responsetime.
ECLIPSE INSTRUMENTATION DIVISION