Rotork plc software

Modbus® remains the most popular process communication protocol in use today with the widest acceptance and highest number of applied systems of any automation protocol.

Profibus is a leading international network protocol for high speed data communications in industrial automation and control.

DeviceNet is an Open Network Standard for communication networks using the main features of CAN bus in an industrial environment.

HART (Highway Addressable Remote Transducer) is a communication protocol based upon the Bell 202 telephone communication standard and uses the FSK (frequency shift keying) principle. The signal consists of two parts, the analogue 4-20 mA current loop and a superimposed digital variable frequency signal.

Industrial Ethernet is becoming increasingly popular for connecting to industrial equipment for control and monitoring applications. Rotork offer both Modbus TCP and Profinet solutions. Modbus TCP is an open standard that allows Modbus messages to be transmitted over an Ethernet network and Profinet is an open standard developed by the Profibus and Profinet organisation.

P3 master stations, delivered after May 2011, will contain a Long Term Data logger (LTD) module. In the case of the hot standby master station, the LTD and the key switch are contained in the same module. For a single channel unit the module will be in the middle slot, which previously contained a blank module.