PID-Fuzzy Logic Controllers
Country: · Model: RE4x
The RE4x series are process controllers with a PID and Fuzzy Logic algorithm. They bring a process to the setpoint in the shortest time with minimum overshoot. The built-in functions are meant for demanding control tasks.
Technical specifications
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
A plain PID controller often overshoots the setpoint during warm-up and then returns to it slowly. Here fuzzy logic is added to the PID, and it shortens the time to reach the set value and reduces overshoot. The same applies to outside disturbances such as an oven door opening or a change in coolant flow, when the controller brings the process back to the setpoint quickly. The series comes in housings of different formats that sit in panels next to indicators and relays, and the displays show the measured and the set value on separate lines. This behaviour matters in thermal chambers, extruders, drying cabinets and other plants where a temperature deviation immediately affects product quality. The variety of built-in functions means separate add-on modules are often unnecessary.
How to choose
The RE4x series is needed where an on-off or a simple PID controller gives too much overshoot. A specific model is chosen by the housing format in the panel, the sensor input type and the set of output channels. For simple temperature holding without strict accuracy demands a more modest controller is enough.
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FAQ
What does fuzzy logic give in RE4x controllers?
Together with PID it brings the process to the setpoint in the shortest time with minimum overshoot during warm-up or disturbances.
Which processes suit the RE4x series?
For demanding control processes where fast approach to the setpoint and stability matter, for example temperature control.
What is overshoot?
It is the excess over the setpoint while the process reaches its regime. The smaller it is, the lower the risk of overheating the product or equipment.
Does the controller handle external disturbances?
Yes. The algorithm adapts to disturbances and returns the parameter to the set value quickly.
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