Omron SYSMAC CJ1W-PRM21, Operation Manual

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34
Setting up a Network
Section 2-4
Note Repeaters are devices which connect two segments. They do not have a sta-
tion address of their own, but they do count in the total number of stations in a
segment.
Repeaters A maximum of up to three repeaters between two stations in a network can be
used, i.e. a network can consist of up to 4 segments. The maximum number
of PROFIBUS stations in such a network is then 122. The figure below shows
an example of a two-segment network.
Tree Topology The use of repeaters allows the extension of three or more Linear Bus seg-
ments in to a Tree topology. In a tree topology more than three repeaters are
allowed, provided that there are no more than three repeaters between any
two stations in the network. The following figure presents an example of a net-
work with more than three segments and repeaters.
Station 2 Station 3 Station 31
Repeater
Station 63 Station 33 Station 32
Termination
Termination Termination
Termination
OMRON
SYSMAC CS1G
P R O G R A MMA B LE
C O N T R O LLE R
Station 1
Segment 1
Max. 31 stations
Segment 2
Max. 31 stations
M / S
M / S
M / S
M / S
Segment 3
Max. 28 stations
Segment 4
Max. 31 stations
Segment 5
Max. 30 stations
Segment 6
Max. 31 stations
M / S
R
R
R
R
M / S
R
Master or slave station
Repeater
Termination
Max. total number of stations = 126
M / S
R