The technology object PID_Compact provides a continuous PID controller with integrated optimization. You can alternatively configure a pulse controller. Both manual and automatic mode are possible.
PID-Compact continuously acquires the measured process value within a control loop and compares it with the required setpoint. From the resulting control deviation, the instruction PID_Compact calculates an output value by which the process value is adapted as quickly and stable as possible to the setpoint. The output value for the PID controller consists of three actions:
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Proportional action
The proportional action of the output value increases in proportion to the control deviation.
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I action
The integral action of the output value increases until the control deviation has been balanced.
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D action
The derivative action increases with the rate of change of control deviation. The process value is corrected to the setpoint as quickly as possible. The derivative action will be reduced again if the rate of change of control deviation drops.
The instruction PID_Compact calculates the proportional, integral and derivative parameters for your controlled system during pretuning. Fine tuning can be used to tune the parameters further. You do not need to manually determine the parameters.
Additional information
FAQ
For more information, see the following FAQs in the Siemens Industry Online Support:
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Entry ID 79047707