Omega CN1166 manual RaPID Control Feature, PRE-TUNE Feature

1.7RaPID CONTROL FEATURE

The RaPID control feature may be used when extra fast responses and minimum overshoot are required. The RaPID feature works best when PID terms are well-tuned; therefore, it is recommended that the Pre-Tune feature (see Subsection 1.8) is run before the RaPID feature is engaged.

Press simultaneously twice

in quick succession

To disengage RaPID control, use the same key actions. NOTE: The RaPID feature cannot be engaged if Proportional Band 1 or Proportional Band 2 is set to 0. For a more detailed description of the RaPID feature, refer to Appendix C.

1.8PRE-TUNE FEATURE

This facility may be used to provide initial tuning of the Profile Controller’s PID parameters. Pre-Tune may be engaged (and subsequently disengaged) as follows:

NOTE: The Pre-Tune facility will not engage if (a) a program is currently running, (b) the process variable is within 5% of input span of the setpoint, or (c) an erroneous key sequence is used. Pre-Tune is a single-shot process which automatically disengages itself when completed.

To engage:

With Profile Controlle r showing a norm a l Op e ra tor Mod e d isp la y:

Upper display	Flashes	Upper display
	once
flashes		stops flashing
HO LD KEYS
DO WN U N TIL
Three seconds approx.

To dis-engage:

With Profile Controlle r showing a norm a l Op e ra tor Mod e d isp la y:

Upper display	Flashes	Upper display
	once
flashes		stops flashing
HO LD KEYS
DO WN U N TIL
Three seconds approx.

Flashes

whilst Pre-Tune

is engaged

Goes OFF

1-4 Volume II O077-1