Emerson Micro Motion 3711, Руководство по конфигурации и использованию, Страница: 113 / 234

Configuration and Use Manual 105
PID Control Loops
PID Contr
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Monitoring and Displa
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Figure 10-2 PID Loop Tuning window
10.4 Tuning the PID control loop
To tune the PID control loop:
1. Click the Tuning button in the PID Loop window. The window is expanded as shown in
Figure 10-2.
2. Configure parameters as required, for both the primary and the override loop. Parameters are
listed and defined in Table 10-1.
Table 10-1 PID loop tuning parameters
Parameter Description Comments
Gain Proportional gain. Ratio of change in the control output to
change in the error. “Error” is the difference between
the setpoint and the current value
of the process variable.
Reset Integral gain. Ratio of change in the control output to change in
the integral of the error, with respect to time. Value represented in terms of
repeats per minute.
Rate Derivative gain. Ratio of change in the control output to change
in the derivative of the error, with respect to time. Value represented in terms of
minutes.