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THE SYNERGETIC FIELDBUS COMPARISON
CHART
(Chart title created from "ism" generator)
BACKGROUND INFORMATION
|
| Fieldbus Name |
Technology Developer |
Year Introduced |
Governing Standard |
Openness |
| PROFIBUS DP/PA |
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 |
Phoenix Contact, Interbus Club |
1984 |
DIN 19258
EN 50.254 |
Products from over
400 manufacturers |
| DeviceNet |
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 |
AS-I Consortium |
Fall 1993 |
Submitted to IEC |
AS-II.C. Market item |
| Foundation Fieldbus H1 |
Fieldbus Foundation |
1995 |
ISA SP50/IEC 61158 |
Chips/software/products from multiple
vendors |
| Foundation Fieldbus High Speed Ethernet (HSE) |
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 |
APC, Inc. |
1990 |
Seriplex spec |
Chips available multiple interfaces |
| WorldFIP |
WorldFIP |
1988 |
IEC 1158-2 |
Multiple chip vendors |
| LonWorks |
Echelon Corp. |
March 1991 |
|
Public documentation on protocol |
| SDS |
Honeywell |
Jan., 1994 |
Honeywell Specification, Submitted
to IEC, ISO11989 |
17 chip vendors,
100+ products |
| ControlNet |
Allen-Bradley |
1996 |
ControlNet International |
Open Specification, 2 Chip Vendors |
| CANopen |
CAN In Automation |
1995 |
CiA |
17 chip vendors, 300 product vendors, Open
specification |
| Ethernet |
DEC, Intel, Xerox |
1976 |
IEEE 802.3, DIX v. 2.0 |
Multitudes of Chips and Products |
| Modbus Plus |
Modicon |
|
|
Proprietary, requires license/ASICs |
| Modbus RTU/ASCII |
Modicon |
|
EN 1434-3 (layer 7)
IEC 870-5 (layer 2) |
Open specification, no special hardware required |
| Remote I/O |
Allen-Bradley |
1980 |
|
Proprietary |
| Data Highway Plus (DH+) |
Allen-Bradley |
|
|
Proprietary |
PHYSICAL CHARACTERISTICS
|
| 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
2.5 Km multi mode w/o Switches; 50 Km mono
mode w/ Switches |
| 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 |
TRANSPORT MECHANISM
|
| Fieldbus Name |
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,
500 kbps,
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 |
| PERFORMANCE |
| 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+ |
|
|
|
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