PROFIBUS-DP characteristics
Section 1-4
5
Multi-peer communication
The configuration shows three active stations (masters) and six passive
stations (slaves). The three masters form a logical token ring. When an active
station receives the token telegram, it can perform its master role for a certain
period of time. During this time it can communicate with all assigned slave
stations in a master-slave communication relationship and a DPM2 master
can communicate with DPM1 master stations in a master-master
communication relationship.
In addition to logical peer-to-peer data transmission, PROFIBUS-DP provides
multi-peer communication (broadcast and multicast).
Broadcast communication:
an active station sends an unacknowledged
message to all other stations (master and
slaves).
Multicast communication:
an active station sends an unacknowledged
message to a predetermined group of stations
(master and slaves).
1-4-2
Data throughput
Transmission time
At 12 Mbit/s PROFIBUS-DP requires only about 1 ms for the transmission of
512 bits of input data and 512 bits of output data distributed over 32 stations.
The figure below shows the typical PROFIBUS-DP transmission time
depending on number of stations and transmission speed. The data
throughput will decrease when more than one master is used.
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...