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MANUAL TUNING (all models)
TUNING THE OUTPUTS FOR HEATING CONTROL

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 955-257 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. START UP After the controller is installed and wired: a) Apply power to controller b) 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. c) Enter the TUNE loop by pushing TUNE-LAST-YES keys in sequence.  (The TUN indicator will illuminate. d) Press PARAM DISPLAY key to advance the TUNE program to "TUNE OUTPUTS". e) 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 page 3-1098







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