Wiring Formations - Omron CS1W-CRM21 Operation Manual

Wiring Formations

3-1 Wiring Formations
Trunk Line-Branch
Line Formation
Unrestricted Wiring
Formation
Master Unit: The Master Unit does not necessarily have to be on one end of the network.
Slave Unit
Slave Unit
Cable type
Round Cable I Trunk-Branch (See
note.)
Round Cable II, Flat Trunk-Branch (See
Cable I, or Flat Cable II note.)
44
A CompoNet network can take two wiring formations: Trunk line − Branch line
and Unrestricted Wiring.
With this wiring formation, the trunk line is differentiated from branch lines.
There are restrictions on the number of branches and the number of Units that
can be connected.
Master Unit: The Master Unit must be on one end of the network.
Branch line
Slave Unit
With this wiring formation, there is no differentiation between the trunk line
and branch lines.
There are no wiring restrictions as long as the total cable length does not
exceed 200 m. There is also no limit on the number of branches.
There is no differentiation between a trunk line and branch lines, and there are no restrictions in
branching as long as a maximum of 32 Slave Units and a total line length of 200 m are not exceeded.
Slave Unit Slave Unit
The formation is determined automatically by the type of cable used and the
required baud rate.
4 Mbps
Trunk-Branch
Trunk-Branch
Note Lines cannot be branched from the trunk line if the baud rate is 4 Mbps. Only
multidrop connections can be used for branching from the trunk line.
Only one level of branching is possible from the trunk line.
Trunk line
Branch line
Branch line
Slave Unit Slave Unit
Repeater Unit
Slave Unit
Slave Unit Slave Unit
Slave Unit
Baud rate
3 Mbps
Trunk-Branch
Trunk-Branch
Section 3-1
Terminating Resistor
Terminating Resistor
Slave Unit
Slave Unit
1.5 Mbps 93.75 kbps
Trunk-Branch
Unrestricted
Terminating
Resistor