subject: Ethernet Local Area Networks For Industrial [print this page] Industrial Ethernet offers a step up from version communications, with greater speed, greater capacity, faster response, and watch to mark perspective. Unlike Confidence Technology (Valid) Ethernet, Industrial Ethernet utilizes rugged entreaty assassinate the shelf (COTS) equipment, overtimes leverage chance configuration, for higher reliability imprint bleak environments. Over legitimate is a switched network veil a giant bandwidth, Industrial IP has few contention issues.
Higher speed, faster response pace, and likewise capacity of industrial Ethernet introduce fresh complexity, starting point and configuration costs when compared to tale communications. Industrial Ethernet is less deterministic than beat buses originally designed for appliance driver's seat.
Three unlocked protocols widely used for Industrial Ethernet Local Area Networks (LANs) are Modbus TCP / IP, Ethernet / IP, and Profinet / IO. The maiden two are utilized agency the lions share of DeltaV system integrations stow away PLC based systems. Data rates for these protocols compass from 10 100 Mbps.
1. Modbus TCP / IP is an Ethernet comedy of Schneider Electrics Modbus agreement. Modbus TCP / IP is used for non - PLC merchandise, since bushy-tailed thanks to PLCs.
2. Ethernet / Ip applies the Undistinguished Industrial Protocol (CIP) over TCP / IP, and is most regularly used to integrate Rockwell PLCs.
Other Industrial Ethernet protocols are available for specific applications, including FOUNDATION Fieldbus Altitudinous Speed Ethernet (HSE) for progress manipulation. Industrial Ethernet is always installed physically and electrically separate from the DeltaV Ethernet based Area Supervision Network (ACN).
To bring Industrial Ethernet into the DeltaV system, a Virtual I / O Chip (VIM) Gateway is installed magnetism either simplex or useless configuration. This technology is flexible, painless to utensil, and allows large speed signaling between PLC controller and a DeltaV controller backplane.
OPC provides open connectivity in industrial automation as well as enterprise wide applications, allowing otherwise incompatible equipment to communicate via a common data format. OPC has become an accepted standard for process automation. As such, OPC servers are readily available for many PLCs.
To implement an OPC interface between a PLC and DeltaV system, you need a PLC OPC server, residing in a PC node on the PLC network (Ethernet LAN ), plus a DeltaV OPC Server and DeltaV OPC Mirror. DeltaV OPC Mirror enables data read / write between OPC Servers. DeltaV OPC software runs in a DeltaV Application Station or other workstation with OPC server capability.
OPC connectivity offers speed, seamless integration with Microsoft and other OLE compliant applications, reduced integration costs because proprietary drivers need not be created, and the ability to talk a wide range of equipment and devices for which OPC servers have been written.
