Yokogawa YVP20S - Manual (Page 114)

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IM 21B04C50-01E
<11. PID BLOCK SERVICES>
11.2 Tuning Parameters
Process tuning parameters may be adjusted from the PID Process controller dialog. Click
Change in the Tuning Parameters frame. The Proportional Gain, Integral Time and
Derivative Time may be entered without changing control mode. Using the Trend service to
view the effect of tuning can be performed by selecting the View>Trend menu item.
Figure 11.2 Change PID Tuning Parameters
WARNING
Changing tuning parameters to incorrect values can result in dangerous process upsets.
Only trained control experts should make these changes.
● Use Trending to assist tuning
While adjusting PID process tuning parameters, it is helpful to use the trend service (See
Chapter 12) to visualize the process dynamics. After opening the trend window form the
PID dialog, Click View>Trend Selection, and check the boxes for Process variable, Process
setpoint, and Target Pos.