Dati e caratteristiche dei Bus di campo Fieldbus Name Link Technology Developer Year Introduced Governing Standard Openness PROFIBUS DP/PA www.profibus.com Siemens DP-1994, PA-1995 EN 50170 / DIN 19245 part 3(DP) /4 (PA), IEC 1158-2 (PA) ASICs from Siemens and Profichip, Products from over 300 vendors INTERBUS-S www.interbusclub.org Phoenix Contact, Interbus Club 1984 DIN 19258 - EN 50.254 Products from over-400 manufacturers DeviceNet www.odva.org Allen-Bradley March 1994 ISO 11898 &11519 17 chip vendors, 300+ product vendors, Open specification ARCNET Datapoint 1977 ANSI/ATA 878.1 Chips, boards, ANSI docs AS-I www.as-interface.com AS-I Consortium Fall 1993 Submitted to IEC AS-II.C. Market item Foundation Fieldbus H1 www.fieldbus.org Fieldbus Foundation 1995 ISA SP50/IEC 61158 Chips/software/products from multiple vendors Foundation Fieldbus High Speed Ethernet (HSE) www.fieldbus.org Fieldbus Foundation In development - lab test phase, Prelim spec available to members IEEE 802.3u - RFC for IP, TCP & UDP Multitude of suppliers for Ethernet components, Extremely low cost IEC/ISA SP50- Fieldbus ISA & Fieldbus F. 1992 - 1996 IEC 1158/ANSI 850 Multiple chip vendors Seriplex www.seriplex.org APC, Inc. 1990 Seriplex spec Chips available multiple interfaces WorldFIP www.worldfip.org WorldFIP 1988 IEC 1158-2 Multiple chip vendors LonWorks www.echelon.com Echelon Corp. March 1991 Public documentation on protocol SDS Honeywell Jan., 1994 Honeywell Specification, Submitted to IEC, ISO11989 17 chip vendors, 100+ products ControlNet www.controlnet.org Allen-Bradley 1996 ControlNet International Open Specification, 2 Chip Vendors CANopen www.can-cia.org CAN In Automation 1995 CiA 17 chip vendors, 300 product vendors, Open specification Ethernet www.modbus.org DEC, Intel, Xerox 1976 IEEE 802.3, DIX v. 2.0 Multitudes of Chips and Products Modbus Plus www.modbus.org Modicon Proprietary, requires license/ASICs Modbus RTU/ASCII www.modbus.org Modicon EN 1434-3 (layer 7)-IEC 870-5 (layer 2) Open specification, no special hardware required Remote I/O www.ab.com Allen-Bradley 1980 Proprietary Data Highway Plus (DH+) www.ab.com Allen-Bradley Proprietary SERCOS www.sercos.org IEC61491 ASIC Fieldbus Name Cycle Time: 256 Discrete 16 nodes with 16 I/Os Cycle Time: 128 Analog 16 nodes with 8 I/Os Block transfer of 128 bytes 1 node PROFIBUS DP/PA Configuration dependent typ <2ms Configuration dependent typ <2ms not available INTERBUS-S 1.8 ms 7.4 ms 140 ms DeviceNet 2.0 ms Master-slave polling 10 ms Master-slave polling 4.2 ms ARCNET Application Layer Dependent Application Layer Dependent Application Layer Dependent AS-I 4.7 ms not possible not possible Foundation Fieldbus H1 <100 ms typical <600 ms typical 36 ms @ 31.25k Foundation Fieldbus HSE Not Applicable; Latency <5ms Not Applicable; Latency <5ms <1ms IEC/ISA SP50 Configuration dependent Configuration dependent 0.2 ms @ 5 Mbps 1.0 ms @ 1 Mbps Seriplex 1.32 ms @ 200 kbps, m/s 10.4 ms 10.4 ms WorldFIP 2 ms @ 1 Mbps 5 ms @ 1 Mbps 5 ms @ 1 Mbps LonWorks 20 ms 5 ms @ 1 Mbps 5 ms @ 1 Mbps SDS <1 ms, event driven 5 ms polling @ 1 Mbps 2 ms @ 1 Mbps ControlNet <0.5 ms <0.5 ms <0.5 ms CANopen <1 ms 5 ms polling @ 1 Mbps <2.5 ms Industrial Ethernet Application Layer Dependent Application Layer Dependent Application Layer Dependent Modbus Plus Modbus RTU/ASCII Remote I/O 12msec @230, 40 msec @57.6 bus cycle time DH+ Fieldbus Name Network Topology Physical Media Max Devices (nodes)) Max Distance PROFIBUS DP/PA Line, star & ring Twisted-pair or fiber 127 nodes- (124 slaves - 4 seg, 3 rptrs) + 3 masters 100m between segments @ 12Mbaud; 24 Km (fiber) (baudrate and media dependent) INTERBUS-S Segmented with "T" drops Twisted-pair, fiber, and slip-ring 256 nodes 400 m/segment, 12.8 Km total DeviceNet Trunkline/dropline with branching Twisted-pair for signal & power 64 nodes 500m (baudrate dependent)- 6Km w/ repeaters ARCNET Star, bus, distributed star Coax, Twisted-pair, Fiber 255 nodes Coax 2000 feet; Twisted pair 400 feet; Fiber 6000 Feet AS-I Bus, ring, tree star, of al Two wire cable 31 slaves 100 meters, 300 with repeater Foundation Fieldbus H1 Star or bus Twisted-pair, fiber 240/segment, 65,000 segments 1900m @ 31.25K wire Foundation Fieldbus HSE Star Twisted-pair, fiber IP addressing - essentially unlimited 100m @ 100Mbaud twisted-pair-2000m @ 100Mbaud fiber full duplex IEC/ISA SP50 Fieldbus Star or bus Twisted-pair fiber, and radio IS 3-7 non IS 128 1700m @ 31.25K 500M @ 5Mbps Seriplex Tree, loop, ring, multi-drop, star 4-wire shielded cable 500+ devices 500+ ft WorldFIP Bus Twisted-pair, fiber 256 nodes up to 40 Km LonWorks Bus, ring, loop, star Twisted-pair, fiber, power line 32,000/domain 2000m @ 78 kbps SDS Trunkline/Dropline Twisted-pair for signal & power 64 nodes,126 addresses 500m (baudrate dependent) ControlNet Linear, Tree, Star, or Combination Thereof Coax, fiber 99 nodes 1000m (coax) 2 nodes-250m with 48 nodes-3km fiber; 30km fiber w/ repeaters CANopen Trunkline/Dropline Twisted Pair + optional Signal & Power 127 Nodes 25-1000m (baudrate dependent) Industrial Ethernet Bus, Star, Daisy-Chain Thin Coax, Twisted Pair, Fiber; Thick Coax (rare) 1024 nodes, expandable to more via Routers Thin: 185m-10 Base T (Twisted Pair): Max 100m long (90 metres horizontal cable, 5m drops, 1m patch)-Max 4 hubs/repeaters between nodes-4Km distancs w/o routers-Fiber: 100 Base FX 400m Modbus Plus Linear Twisted Pair 32 nodes per segment, 64 max 500m per segment Modbus RTU/ASCII Line, star, tree Network w/ segments Twisted Pair 250 nodes per segment 350m Remote I/O Linear Trunk Twinaxial 32 nodes/segment 6 km DH+ Linear Trunk Twinaxial 64 nodes/segment 3 km Fieldbus Nameww Communication Methods Transmission Properties Data Transfer Size Arbitration Method Error Checking Diagnostics PROFIBUS DP/PA Master/slave-peer to peer DP: 9.6, 19.2, 93.75, 187.5, 500 Kbps, 1.5, 3, 6, 12 Mbps PA: 31.25 kbps 0-244 bytes Token passing HD4 CRC Station, module & channel diagnostics INTERBUS-S Master/slave with total frame transfer 500kBits/s,full duplex 1-64 Bytes data 246 Bytes Parameter 512 bytes h.s.,unlimited block None 16-bit CRC Segment location of CRC error and cable break DeviceNet Master/slave, multi-master, peer to peer 500 kbps,250 kbps,125 kbps 8-byte variable message with fragmentation for larger packets Carrier-Sense Multiple Access w/ Non-Destructive Bitwise Arbitration CRC check Bus monitoring ARCNET Peer to peer 19.53K to 10M 0 to 507 bytes Token passing 16-bit CRC Built in Acknowledgements at Datalink layer AS-I Master/slave with cyclic polling Data and power, EMI resistant 31 slaves with 4 in and 4 out Master/slave with cyclic polling Manchester Code, hamming-2 Slave fault, device fault Foundation Fieldbus H1 Client/server publisher/ subscriber, Event notification 31.25 kbps 128 octets Scheduler, multiple backup 16-bit CRC Remote diagnostics, network monitors, parameter status Foundation Fieldbus HSE Client/Server, Publisher/Subscriber, Event Notification 100Mbps Varies, Uses Standard TCP/IP CSMA/CD CRC IEC/ISA SP50 Fieldbus Client/server Publisher/ subscriber 31.25 kbps IS+1, 2.6, 5 Mbps 64 octets high & 256 low priority Scheduler, tokens, or master 16-bit CRC Configurable on network management Seriplex Master/slave,peer to peer 200 Mbps 7680/transfer Sonal multiplexing End of frame & echo check Cabling problems WorldFIP Peer to peer 31.25 kbps, 1 & 2.5 Mbps, 6 Mbps fiber No limit, variables 128 bytes Central arbitration 16-bit CRC, data "freshness" indicator Device message time-out, redundant cabling LonWorks Master/slave,peer to peer 1.25 Mbs full duplex 228 bytes Carrier Sense, Multiple Access 16-bit CRC Database of CRC errors and device errors SDS Master/slave, peer to peer,multi-cast,multi-master 1Mbps,multi-master,250 kbps,125 kbps 8-byte variable message Carrier-Sense Multiple Access w/ Non-Destructive Bitwise Arbitration CRC check Bus monitoring ControlNet Producer/Consumer, Device Object Model 5 Mbps 0-510 bytes variable CTDMA Time Slice Multiple Access Modified CCITT with 16-bit Polynomial Duplicate Node ID, Device, Slave Faults CANopen Master/slave, peer to peer, multi-cast, multi-master 10K, 20K, 50K, 125K, 250K, 500K, 800K, 1Mbps 8-byte variable message Carrier-Sense Multiple Access w/ Non-Destructive Bitwise Arbitration 15 Bit CRC Error Control & Emergency Messages Industrial Ethernet Peer to Peer 10, 100Mbps 46-1500 Bytes CSMA/CD CRC 32 Modbus Plus Peer to Peer 1Mbps variable Modbus RTU/ASCII Master/Slave 300 bps - 38.4Kbps 0-254 Bytes Remote I/O Master/Slave 57.6 - 230 kbps 128 Bytes CRC 16 none DH+ Multi-Master, Peer<>Peer 57.6 kbps 180 Bytes none
