Setting up a network
Section 2-3
14
CPU Unit models
Max. No. of Master Units
C200HS-CPU
[ ] (all models)
C200HE-CPU11/32/42
C200HG-CPU33/43
C200HX-CPU34/44
10
C200HG-CPU53/63
C200HX-CPU54/64
CS1-series
16
2-3
Setting up a network
2-3-1
Fieldbus cabling
Bus structure
Cable type
All devices are connected in a bus structure (i.e. line). Up to 32 stations
(master or slaves) can be connected in one segment. The bus must be
terminated at the beginning and at the end of each segment. When more than
32 stations are used, repeaters must be used to link the individual bus
segments. The maximum number of stations that can be connected to a
C200HW-PRM21 is 124.
The standard EN 50170 specifies to use line type A of shielded twisted pair
cables with the following parameters:
Maximum length
The maximum length of the cable depends on the transmission speed. The
cable lengths specified in the table below are based on line type A.
Repeaters
The communication distance can be increased by the use of repeaters. It is
not recommended to use more than 3 repeaters in series. A repeater also
must be included in the count of the number of stations per segment to
determine the bus load (so only 31 ‘normal’ devices are possible per segment
if a repeater is used)
Stub lines
Stub lines should be avoided for data transmission speeds of more than
500 kbit/s. Plug connectors available on the market permit the incoming data
cable and the outgoing data cable to be connected directly in the plug
connector. This means that stub lines do not have to be used, and the bus
plug connector can be connected and disconnected at all times without
interrupting data communication with the other stations.
Parameter
Value
Impedance
135 to 165
Ω
Capacitance per unit length
< 30 pF/m
Loop resistance
110
Ω
/km
Core diameter
0.64 mm
Core cross section
> 0.34 mm
2
Baud rate (kbit/s)
Distance/segment (m)
9.6, 19.2, 93.75
1200
187.5
1000
500
400
1500
200
3000, 6000, 12000
100
Содержание C200HW-PRM21
Страница 1: ...C200HW PRM21 PROFIBUS DP Master Unit OPERATION MANUAL Cat No W349 E2 2...
Страница 2: ......
Страница 3: ......
Страница 4: ......
Страница 5: ...C200HW PRM21 PROFIBUS DP Master Unit Operation Manual Produced May 2000...
Страница 6: ...iv...
Страница 8: ...vi...
Страница 12: ...x...
Страница 66: ...Debug mode Section 4 4 50...
Страница 98: ...Messages Section 6 4 82...
Страница 108: ...Maintenance Section 7 3 92...
Страница 110: ...94...
Страница 112: ...96...
Страница 116: ...100...
Страница 120: ...104...
Страница 124: ......
Страница 126: ...Authorised Distributor Cat No W349 E2 2 Note Specifications subject to change without notice Printed in the Netherlands...