Siemens SIPART DR20

Project Planning Manual SIPART DR20
• PD controller (S28 = 1)
- Adjust the desired setpoint and control the negative deviation to zero in manual mode. In
position "AUTO" of parameter yo, the working point required for a negative deviation of zero
is set automatically in the process.
- Switch to automatic mode.
- Slowly increase Kp until the control loop tends to oscillate upon changes in the setpoint.
- Switch Tv from OFF to 1 s.
- Increase Tv until the oscillations are eliminated.
- Slowly increase Kp until oscillations occur again.
- Repeat the settings in the above two steps until the oscillations can no longer be
eliminated.
- Slightly decrease Tv and Kp until the tendency to oscillate is eliminated.
• PI controller (S28 = 0)
- Adjust the desired setpoint and control the negative deviation to zero in manual mode.
- Switch to automatic mode.
- Slowly increase Kp until the control loop tends to oscillate upon changes in the setpoint.
- Slightly decrease Kp until the tendency to oscillate is eliminated.
- Decrease Tn until the control loop tends to oscillate again.
- Slightly increase Tn until the tendency to oscillate is eliminated.
• PID controller (S28 = 0)
- Adjust the desired setpoint and control the negative deviation to zero in manual mode.
- Switch to automatic mode.
- Slowly increase Kp until the control loop tends to oscillate upon changes in the setpoint.
- Switch TV from OFF to 1 s and increase until the oscillations are eliminated.
- Slowly increase Kp until oscillations occur again.
- Repeat the settings in the above two steps until the oscillations can no longer be
eliminated.
- Slightly decrease Tv and Kp until the tendency to oscillate is eliminated.
- Decrease Tn until the control loop tends to oscillate again.
- Slightly increase Tn until the control loop is stable.
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