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Rotork introduces ultra-fast network control for valve actuators

Rotork has improved its Pakscan two-wire digital control system with the introduction of a new P4 master station capable of running the new Pakscan Plus ultra-fast control loop.

On the P4 master station, a large touch screen display provides an easy-to-use, multilingual user interface providing quick device setup, interrogation, and issue resolution.

NAMUR standard diagnostic icons and colours are used for easy recognition of status and alarms.

Ease of navigation around the screens is enhanced by having identical screens for both the in-built web pages and the integral touch screen, each using the same menu structure.

A dedicated service Ethernet port maintains Local Area Network (LAN) separation between configuration or monitoring systems and the systems for controlling the process.

The P4 master station has advanced field network option capabilities, including a new ultra-fast Pakscan Plus Network and a Modbus network, thus enabling connection to third-party Modbus field devices.

The modular design enables one P4 station to supervise up to four field networks, including existing Pakscan wired or wireless networks.

Operating at communication speed of up to 15Mbit/s using the highly noise immune SHDSL protocol, each Plus network can connect up to 300 field devices with a distance between each device of up to 5km, resulting in networks lengths that can extend over hundreds of kilometres.

The full-duplex network enables full modulating positional control of process valves.

Priority is given to process data whilst built-in high-availability seamless redundancy (HSR) ensures instant isolation of any loop fault without loss of data, allowing continued operation of a plant if a fault occurs.

Along with single and dual configurations, the P4 master station can be supplied in a hot standby configuration where all interfaces are duplicated.

Multiple host connectivity is provided as standard, with a fully pre-configured database providing easy integration with proven communications to all major DCS and PLC suppliers via the Modbus TCP/RTU protocol.

The touch screen display also allows stand-alone operation in the event of unavailability of the host.

Swift access to plentiful device data optimises the scope for predictive maintenance and asset management, at the DCS/PLC, the asset management system, or at the P4 master station.

Available data includes operating history, status, diagnostics, and alarm logs.

The Pakscan System is designed for economical installation and minimum cost of ownership.

The single twisted pair cable or wireless network reduces installation engineering effort and associated costs.

The system is fully supported with documentation, on-site or in-house training, and Rotork’s global network of trained service engineers.