Profibus Installation Guidelines - YASKAWA VIPA System MICRO M13-CCF0000 Manual

Option: Deployment PROFIBUS communication

PROFIBUS installation guidelines

8.5 PROFIBUS installation guidelines
PROFIBUS in general
Transfer medium
Bus connection
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n A PROFIBUS DP network may only be built up in linear structure.
n PROFIBUS DP consists of minimum one segment with at least one master and one
slave.
n A master has always been deployed together with a CPU.
n PROFIBUS supports max. 126 participants.
n Per segment a max. of 32 participants is permitted.
n The max. segment length depends on the transfer rate:
9.6 ... 187.5bit/s ® 1000m
500kbit/s ® 400m
1.5Mbit/s ® 200m
3 ... 12Mbit/s ® 100m
n Max. 10 segments may be built up. The segments are connected via repeaters. Every
repeater counts for one participant.
n The bus respectively a segment is to be terminated at both ends.
n All participants are communicating with the same transfer rate. The slaves adjust
themselves automatically on the transfer rate.
n As transfer medium PROFIBUS uses an isolated twisted-pair cable based upon the
RS485 interface.
n The RS485 interface is working with voltage differences. Though it is less irritable
from influences than a voltage or a current interface. You are able to configure the
network as well linear as in a tree structure.
n Max. 32 participants per segment are permitted. Within a segment the members are
linear connected. The segments are connected via repeaters. The maximum segment
length depends on the transfer rate.
n PROFIBUS DP uses a transfer rate between 9.6kbit/s and 12Mbit/s, the slaves are
following automatically. All participants are communicating with the same transfer
rate.
n The bus structure under RS485 allows an easy connection res. disconnection of sta-
tions as well as starting the system step by step. Later expansions don't have any
influence on stations that are already integrated. The system realizes automatically if
one partner had a fail down or is new in the network.
The following picture illustrates the terminating resistors of the respective start and end
station.
VIPA System MICRO
HB400 | CPU | M13-CCF0000 | en | 16-47