Integral Blocks
S5-115U Manual
The continuous action controller is designed for controlled systems such as those used in pressure,
temperature, or flow rate control.
The "R" parameter sets the proportional component of the PID controller.
If proportional action is required, most controller designs use the value R=1.
The individual proportional-action, integral-action, and derivative-action components can be
deactivated via their parameters (R, TI, and TD) by presetting the pertinent data words with zero.
This enables you to implement all required controller structures without difficulty, e.g., PI, PD, or
PID controllers.
You can forward the system deviation XW or, using the XZ input, any disturbance variable or the
inverted actual value X to the differentiator. Specify a negative K value for an inverted control
direction.
When the correction information (dY or Y) is at a limit, the integral-action component is auto-
matically deactivated in order not to impair the dynamic response of the controller.
The switch settings in the block diagram are implemented by setting the associated bits in control
word STEU when the D controller is initialized.
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