Lenze EMF2179IB - Manual (Page 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
1 master
512 slaves,
1 master
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)
2 km at 78 kbits/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
2 Mbits/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)
0 to 8 bytes 0 to 8 bytes 0 to 246 bytes 4 bits 1 to 64 bytes data;
up to 246 bytes
parameters
1 to 64 bytes data;
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 +
6 to 11 bytes
21 bits, of which:
14 bits master, 7
bits slave
User data +
6 bytes
User data +
6 bytes
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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