Trending service, Trending service -1 – Yokogawa YVP20S User Manual
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<12. TRENDING SERVICE>
12. TRENDING SERVICE
The trend service may be used to observe the dynamic behavior of both the control valve
and its associated process variable. It is particularly useful for tuning the PID process loop
and may be used to alter the response of the positioner control algorithm after auto-tuning.
Each device is provided with one trend window (ValveNavi supports up to 30 trend windows
open simultaneously).
Figure 12.1 Trend with Pressure Loop
Figure 12.2 Open Trend from Device Selection Frame