PIDE Autotune Dialog Box Overview
The Enhanced Proportional Integral Derivative (PIDE) instruction provides enhanced capabilities over the standard PID instruction for control of process variables (PV) such as flow, pressure, temperature, or level. The Logix Designer application PIDE autotuner provides an open-loop autotuner built into the PIDE instruction. You can autotune from PanelView terminals or any other operator interface devices, as well as the Logix Designer application. The PIDE block has an Autotune Tag (type PIDE_AUTOTUNE) that you specify for those PIDE blocks that you want to autotune.
Use the
PIDE Autotune
dialog bo to autotune your PIDE block, select or configure the gains, and then load the gains into the controller.The following table describes the parameters available on the
PIDE Autotune
tab. Parameter | Description |
Start | Click this button to begin the autotune process. Note that the PIDE loop must be in Manual in order for the autotuning to proceed. |
Abort | Click this button to abort the autotune process. |
Execution State | The current state of the autotune process. Displays either:
|
Autotune Status | Displays detailed fault status information, if any. |
Autotune Gains Buttons | Select the appropriate combination of check boxes, based on the gains you want to download to the controller. If you select Slow , Medium , or Fast Response , the ResponseSpeed parameter is adjusted accordingly.If you choose Current , then the Proportional , Integral , and Derivative fields are enabled, and you can adjust them accordingly. |
Slow Response, Proportional | Displays the value of the PgainTunedSlow autotune parameter. |
Slow Response, Integral | Displays the value of the IgainTunedSlow autotune parameter. |
Slow Response, Derivative | Displays the value of the DgainTunedSlow autotune parameter. |
Medium Response, Proportional | Displays the value of the PgainTunedSlow autotune parameter. |
Medium Response, Integral | Displays the value of the IgainTunedMed autotune parameter. |
Medium Response, Integral | Displays the value of the IgainTunedMed autotune parameter. |
Medium Response, Derivative | Displays the value of the DgainTunedMed autotune parameter. |
Fast Response, Proportional | Displays the value of the PgainTunedFast autotune parameter. |
Fast Response, Integral | Displays the value of the IgainTunedFast autotune parameter. |
Fast Response, Derivative | Displays the value of the DgainTunedFast autotune parameter. |
Current, Proportional | Displays the value of the PGain PIDE parameter. |
Current, Integral | Displays the value of the IGain PIDE parameter. |
Current, Derivative | Displays the value of the DGain PIDE parameter. |
Set Gains in PIDE | Click this button to set the PIDE current gains with the selected tuned gains. |
Time Constant | Displays the value of the TimeConstant autotune parameter. This shows the first order lag time constant used by the process model estimated by the autotuning algorithm. This value, along with the Deadtime and Gain , allows you to estimate the accuracy of the tuning constants derived by the autotuner. |
Deadtime | Displays the value of the DeadTime autotune parameter. This shows the deadtime used by the process model estimated by the autotuning algorithm. This value, along with the Time Constant and Gain , allows you to estimate the accuracy of the tuning constants derived by the autotuner. |
Gain | Displays the value of the Gain autotune parameter. This shows the process gain used by the process model estimated by the autotuning algorithm. This value, along with the Time Constant and Deadtime , allows you to estimate the accuracy of the tuning constants derived by the autotuner. |
Close | Click this button to close the PIDE Autotune dialog box. |
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