Azbil SLPC1F, Руководство пользователя

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5-27
Chapter 5. Adjusting PID Values
(3) Switch from MANUAL mode to AUTO mode. Continue the operation even
though the PV or MV may become unstable after switching to AUTO mode.
(4) Change the set point of the controller to the step response set point.
Handling Precautions
•
If you have a PID value with a problem to be solved, do the step response
using that PID value.
„ Step 5: End data sampling
Once the step response is complete, stop the data sampling. When to stop data
sampling differs depending on the step response result.
z When overshoot is occurring
End data sampling after sampling data for about three times longer than the time
from the start of step response until the PV reached the set point, as shown in the
figure below.
z When hunting is occurring
End data sampling after sampling data about three times longer than the time from the
start of the step response until the PV reached the set point, as in the case of overshoot.