ProSoft Technology 5204-DFNT-PDPMV1 - Manual (Page 12)

Functional Overview PDPMV1 ♦ ProLinx Gateway
Protocol Manual PROFIBUS DPV1 Master
Page 12 of 157 ProSoft Technology, Inc.
March 23, 2011
1.3 PROFIBUS DP Architecture
The PROFIBUS DP-V1 Master network supports multiple Master systems with
several slaves.
The following table shows the most important features of PROFIBUS DP-V1
Master:
Standard EIN 501 70
DIN 19245
Transmission equipment (Physical) EIA RS-485
IEC 1158-2 (through link or coupler)
Fiber Optic Cable (not available)
Transfer procedure Half-duplex
Bus topology Linear bus with active bus termination
Bus cable type Shielded twisted pair conductors
Connector 9-pin D-Sub
Number of nodes on the bus Max: 32 with no repeaters
Max: 125 with 3 repeaters in 4 segments
1.3.1 How Cable Length Affects Communication Rate
Max Bus Cable Length Per Segment Baud Rates (for 12 Mbps cable)
1.2 km 9.6 kbit/sec
1.2 km 19.2 kbit/sec
1.2 km 93.75 kbit/sec
1.0 km 187.5 kbit/sec
0.5 km 500 kbit/sec
0.2 km 1.5 Mbit/sec
0.1 km 3 Mbit/sec
0.1 km 8 Mbit/sec
0.1 km 12 Mbit/sec
1.3.2 Bus Access
Two different bus access procedures handle the various communication
requirements for the PROFIBUS DP-V1 Master topology:
Token Passing
Polling