Lenze EMF2179IB Bedienungsanleitung PDF herunterladen (Seite 8)

Preface

Comparison of industrial fieldbus systems

1

1.2



1.2-1

EDSDEN EN 06/2004

1.2 Comparison of industrial fieldbus systems

CAN /

CANOpen

DeviceNet PROFIBUS-DP AS-i Interbus INTERBUS

loop

LON

Topology

Line with

terminating

resistors

Line with

terminating

resistors

Line with

terminating

resistors

Line, tree, ring

(possible)

Ring Ring Line (2 wire) or any

other

Bus

management

Multi master Single master Single master Single master Single master only together with

INTERBUS-S; single

master (bus

terminal)

Multi master

Max. number

of devices

(master and

slaves)

64 64 124 (4 segments, 3

repeaters),

max. 32 per

segment

124 sensors/actors

1master

512 slaves,

1master

32 slaves 32385 devices

distributed to 255

subnetworks with

127 devices each

Max. distance

between

devices

without

repeater

Dependent on the

baud rate

1 km (50 kbits/s)

25 m (1 Mbits/s)

100 m (500

kbits/s)

250 m (250

kbits/s)

500 m (125

kbits/s)

1.2 km (93.75

kbits/s)

100 m (12 Mbits/s)

100 m 1.5 m (local bus)

400 m (remote

bus)

2.5 km (optical

fibre)

10 m (max. 100 m

cable length

without repeater)

2kmat78kbits/s

(twisted pair),

6.1 km at 5.48

kbits/s (optical

fibre plastics)

Max. distance

between

devices with

repeater

General length

reduction

Dependent on the

repeater used

Not specified 10 km (93.75

kbits/s)

300 m (2

repeaters)

13 km (remote

bus),

100 km (optical

fibre)

No repeater

required

Almost any

Expandable by

subnetworks

(without

repeaters)

Transfer

medium

Shielded, twisted

pair cable

Shielded, twisted

pair cable

Shielded, twisted

pair cable

Unshielded and

untwisted flat pair

cable

Shielded, twisted

5-wire cable

Optical fibre,

infrared

Unshielded,

twisted pair cable

Unshielded and

untwisted pair

cable

Radio, optical fibre,

power line

Auxiliary

energy supply

via bus cable

Possible via

additional wires in

the bus cable

Possible via

additional wires in

the bus cable

Possible via

additional wires in

the bus cable

Current supply via

data cable (2 to 8

A)

Group via bus

terminal (remote

bus)

Current supply via

data cable (approx.

1.5 A)

Possible via

additional wires in

the bus cable

Baud rate

10 kbits/s - 1

Mbit/s

125 kbits/s,

250 kbits/s,

500 kbits/s

9.6 kbits/s - 12

Mbits/s

167 kbits/s 500 kbits/s oder

2Mbits/s

500 kbits/s 78 kbits/s - 1.25

Mbits/s

Typical update

time (e.g. 8

devices, 4

bytes user

data)

Approx. 1.32 ms at

1 Mbit/s (high

priority)

Approx. 2.64 ms at

500 kbits/s (high

priority)

Approx. 2.5 ms at

500 kbits/s

Typically 5 ms

(every 4 bits)

At least 2 ms

(process data)

At least 2 ms

(process data)

Approx. 70 ms

Telegram

length (user

data)

0to8bytes 0to8bytes 0 to 246 bytes 4bits 1to64bytesdata;

up to 246 bytes

parameters

1to64bytesdata;

up to 246 bytes

parameters

1 to 228 bytes

data;

typically approx.

11 bytes

Telegram

length (total)

106 bits at 8 bytes

user data

106 bits at 8 bytes

user data

User data +

6to11bytes

21 bits, of which:

14 bits master, 7

bits slave

User data +

6bytes

User data +

6bytes

Max. 255 bytes,

User data + 27

bytes

Bus access

methods

CSMA/CA message

oriented

CSMA/CA message

oriented

Cyclic polling Cyclic polling Time grid /

distributed shift

register

Time grid /

distributed shift

register

Modified

CSMA/CD

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