Pid Configuration (Prog > Pid.s); Action Response (Prog > Pid > Actn); Autotune Timeout (Prog > Pid > A.to); Autotune (Prog > Pid > Tune) - Omega CN8EPt User Manual

TM
PLATINUM Series Controllers User's Guide
7.5 PID Configuration (PRoG > PId.S)
Select PId.S to configure the PID control settings. These settings apply to all outputs that have
had their Control Mode set to PID
PId)). PID control can be optimized in a variety of ways. The suggested way is to initiate an
Autotune command
(7.5.7 Adaptive Tuning (PRoG > PId >
manually adjusted after an Autotune command has been executed.
Navigate to the desired setting. Settings include the following:

ACtN – Action direction moves up or down to SP1

A.to – Autotuning Timeout sets a maximum amount of time for Autotuning

AUto – Initiates Autotuning

GAIN – Select the proportional, integral, and derivative factors for manual tuning

%Lo – Low clamping limit for Pulse and Analog outputs

%HI – High clamping limit for Pulse and Analog outputs

AdPt – Fuzzy logic adaptive tuning
Select the desired parameter.
7.5.1 Action Response (PRoG > PId > ACtN)
Select the Direction (ACtN) parameter.
Navigate to the desired setting. Settings include the following:

RVRS – "Reverse Action": Increase to SP1, such as heating (factory default)

dRCt – "Direct Action": Decrease to SP1, such as cooling

RVRS/dRCt – Increase or Decrease to SP1, such as heating/cooling
Select the indicated setting.
7.5.2 Autotune Timeout (PRoG > PId > A.to)
Select the Autotune Timeout (A.to) parameter.
Set the amount of time before the Autotune process gives up and times out in Minutes and
Seconds (MM.SS). Slowly responding systems should have a longer time-out setting.
Select the indicated setting.
7.5.3 Autotune (PRoG > PId > TUNE)
Select the Autotune (AUto) command. The unit displays StRt.
Confirm Autotune activation. The unit attempts to optimize the P, I, and d settings by
stimulating the system and measuring the response. If the A.to time out period expires before
the Autotune operation can complete, the unit displays a failure message E007. If the
Autotune operation completes successfully, the unit displays the message "doNE" and the
Run mode is switched to IDLE.
The Autotune function will select the tuning algorithm depending on the stability of current process and
the error difference between current process and the Control Setpoint (SP1). If the process is relatively
stable (i.e: at room temperature), a bump test will be performed to determine the plant characteristics.
M5451
Reference Section: Programming Mode (PRoG)
(7.4.1.2 PID Control Mode (PRoG > oUt1-oUt6 > ModE >
(7.5.3 Autotune (PRoG > PId >
AdPt)). The PID parameters may also be set manually or
AUto)) and then enable adaptive tuning
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