Controlling multiloops

Input accuracy and isolation in Eurotherm’s Series 2000 controller are achieved by the use of a special digital filter circuit which ensures high integrity measurement of the process variable. An Asic continually corrects for drift, rejecting 50/60Hz pick-up and filtering out other sources of input noise, as well as making recalibration unnecessary. A wide range […]

Input accuracy and isolation in Eurotherm’s Series 2000 controller are achieved by the use of a special digital filter circuit which ensures high integrity measurement of the process variable. An Asic continually corrects for drift, rejecting 50/60Hz pick-up and filtering out other sources of input noise, as well as making recalibration unnecessary.

A wide range of industry standard communications interfaces allow easy connection of such controllers to PLCs, PCs and other supervisory computers, with the capability of providing batch reports or quality records, thus fulfiling the requirements for product traceability. Interfaces available at present include: RS232, RS485/422 and Modbus protocols. Models in the range can also accept Profibus DP and DeviceNet communications.

The latest addition to the series is a multi-function controller/programmer available in a single, dual or three-loop format. The base 2604 controller has two analogue inputs and nine digital I/O. Five additional modules can also be fitted.

The 2604 has been designed for multi-loop applications such as furnace and kiln control and a wide range of batch operations in the chemicals, brewing and pharmaceuticals industries. The controller’s algorithm gives straight line control of the process. Automatic tuning simplifies the commissioning procedure by performing a one shot tune to calculate the optimum PID and cutback values for each loop. Gain scheduling can also be used to transfer control between three sets of PID values.

Eurotherm Controls Tel: 01903 268500