The RT 578 facilitates practical learning in the control of four controlled variables which are commonplace in process engineering.
A circuit with a graduated transparent tank is provided for the control of flow rate, level and pressure. Two actuator possibilities are included for use, namely, a variable-speed pump and a pneumatic control valve. A disturbance variable can be generated by a valve in the tank outlet for level and pressure control. A valve at the tank head also permits investigation of level control with and without counter pressure.
A heating circuit with a heater, heat exchanger and pump is provided for temperature control. The temperature can be controlled using the heater as the actuator, or by way of the flow of cooling water through the heat exchanger.
Two forms of cascade control are possible. The level in the tank can be controlled by way of the flow rate. The temperature in the heating circuit can be controlled by way of the flow rate through the heat exchanger. For these two cascade controls, either the pump or the control valve can be used as the actuator.
The controlled variables are measured using sensors. Four selectable control loops can be configured and parameterised via the integrated PLC with touchscreen. Process variables are recorded using the PLC. The measured values are stored internally and displayed in a graph.
Using the integrated router, the trainer can alternatively be operated and controlled via an end device. The user interface can also be displayed on additional end devices (screen mirroring). Access to stored measured values is possible from end devices via WLAN with the integrated router/LAN connection to the customer’s own network.
