Designed to offer outstanding control performance and provide a comprehensive solution for a wide variety of applications; such as food processing, plastic manufacturing, and process applications requiring heat/cool control and process protection alarms in a compact DIN rail mounted package.
Universal thermocouple or RTD input coupled with a responsive SMART auto-tuning PID control algorithm that is equipped with special functions, including soft start and nonlinear cooling. A complete set of process protection alarm functions; high and low limit, band and deviation are included.
Modular interconnection allows simultaneous connection of all common instrument elements: power supply, serial interface, logic input and open collector output for common alarms. The RFS-AL alarm-logic input expansion unit makes use of the modular interconnection function to provide additional I/O capacity.
Eliminates differential heating during startup due to different heat rates of individual heaters in applications such as extruders and injection hot runner control. The setpoint ramp rates of all heating zones within a group are synchronized by “holding back” the ramping setpoint. In order to achieve this, the individual loop band alarms are controlled by the common alarm output and isolated logic input functions
PC interface port + OPC based configuration software
The integrated configuration port uses special software and an adaptor allowing:
- Easy configuration of the instrument, with descriptions of the parameters and the relative limits.
- Computer storage of the complete configuration allowing it to be copied to other RFS units.
- Copying and cloning of the configuration to a new instrument.
- The configuration interface port can be used for configuration and for monitoring the process during setup.
Automatically adjusts the PID parameters according to the process dynamics. An important characteristic of the Eurotherm Controls continuous self tuning algorithm is its ability to optimize control parameters without injecting any artificial disturbances into the system.
Sequential addresses (Modbus) for commonly accessed parameters
To maximize the data transfer rates between the RFS and the host supervisory system, important operating parameters are grouped. Digital status information is transferred as data words to increase efficiency. The RFS is able to communicate relevant parameter information with a single data request, instead of a series of separate address operations.
Process protection alarms
Process (high or low limit), Band and Deviation alarm outputs are available with the additional flexibility of latching and masking functions until the process variable reaches the alarm threshold. Band and Deviation alarms are also masked after a setpoint change until the process variable reaches the alarm threshold. The alarm latching function holds the alarm on until it is acknowledged.
Startup energy management
To reduce the maximum electrical loading at machine startup, the sequence of the RFS control outputs is scheduled according to the selected instrument Modbus address. This significantly reduces maximum startup current requirements and offers potential savings in electrical installation capacity and cabling specification requirements.