Omron 3G8F7-CRM21, User Manual

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165
Wiring Formations
Section E-2
The Same Address
Can Be Used for
Different Node
Address Types
You can use the same node address again for different node address types as
long as long as the same areas are not allocated.
You cannot use the same address for a Word Mixed Slave Unit and Word
Output Slave Unit because the same areas would be allocated. The same is
true for a Bit Mixed Slave Unit and Bit Output Slave Unit.
Example 1: You can use a Word Input Slave Unit with node address 0 and a
Word Output Slave Unit with node address 0.
Example 2: You can use a Word Mixed Slave Unit with node address 1 and a
Bit Mixed Slave Unit with node address 1.
Example 3: You can use a Word Input Slave Unit with node address 2 and a
Repeater Unit with node address 2.
The Same Address
Cannot Be Used for
the Same Node
Address Type
Example 1: You cannot use two Word Input Slave Units with node address 1.
Example 2: You cannot use a Bit Input Slave Unit with node address 2 and a
Bit Mixed Slave Unit with node address 2.
You Cannot Use
Nodes That Are
Allocated the Same
Areas at the Same
Time
Refer to 3-1-1 Settings Required for Starting the Communications Cycle and
3-2-1 Allocation of I/O Data for information on allocated areas.
Example 1: A 64-point Word Output Slave Unit with node address 2 uses
node addresses 2, 3, 4, and 5 for the Word OUT Slave Unit node
address type. Therefore, you cannot use node addresses 2 to 5
for any other Word Output Slave Unit at the same time.
Example 2: A Word Mixed Slave Unit with 32 inputs and 32 outputs with node
address 0 uses node addresses 0 and 1 for the Word MIX Slave
Unit the Word OUT Slave Unit node address types. Therefore,
you cannot use node addresses 0 or 1 for any other Word Input
or Mixed Slave Unit at the same time.
E-2 Wiring Formations
A CompoNet Network can employ either of two possible wiring formations.
E-2-1 Trunk Line-Branch Line Formation
In this wiring formation, the trunk line is differentiated from the branch lines.
There are restrictions on the number of branches and the number of
connecting Units.
Trunk line
Branch line
Slave Unit
Terminating Resistor
Branch line
Branch line
Slave Unit Slave Unit
Master Board