Honeywell TDC 3000 basic controller

introduction：

The Honeywell TDC 3000 Basic Controller consists of a microprocessorbased card file (model CB120) providing multifunctional process control, and a dedicated terminal panel for process signal interconnection. The controller is configured by the user to provide precision automatic control for 8 independent or cascaded control loops. A reserve controller capability is available in the Basic Controller Model CB121.

Functional Description：

The Basic Controller(Figure1)is equivalent to eight conventional multimode multi-functional controllers. The electronics are packaged in a single card file and the process interconnection is terminated at the printed wire terminal panel.

Eight sets of process signals, hardwired to the terminal panel, are interrogated individually by the controller file, and a customer-selected equation or algorithm is applied to each. This action results in eight discrete analog output control signals which are routed back to the terminal panel for distribution to the respective control elements.

The process input signals, a code relating the selected algorithm, and the resultant output signals are stored digitally in designated controller file areas referred to as computational slots. A slot, therefore, contains the required data necessary for controller action.