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Basic System
Maximum Number of
Connectable Remote I/O
Units
Caution
!
Total I/O Points
Item
Masters per PC
Slaves per Master
Slaves per PC
Total Slaves, I/O Link Units, and
Optical I/O Units per Master
Connection words per Master
*In C200H Systems, the maximum number of connectable Units and words is the same
regardless of whether one or two Masters are used.
In C1000H and C2000H Systems, the CPU determines the number of con-
nected Slaves from the assigned Unit numbers, as shown in the following table.
It is thus important to always set Unit numbers in order starting from #0 so that
the number of Units that can be used in the System is not limited.
Largest Unit No. Set
0 or 1
2 or 3
4 or 5
6 or 7
The total number of I/O points in the System must not exceed the number of I/O
points provided by the CPU to which the Master is mounted.
The number of I/O points in a C1000H System can be increased up to 2,048, and
the number of points in a C200H System can be increased to 1,680, by including
Remote I/O Units and the necessary related Units. The total number of I/O points
available from the CPU Rack or Expansion I/O Racks, however, is 1,024.
CPU
C2000H
C1000H
C500
C200H
C120
Total number of I/O points in System
Total number of I/O points on CPU and Expansion I/O Racks
Total number of I/O points on Optical Slave Racks
Total number of points on I/O Link Units
Total number of points on Optical I/O Units
Total number of I/O points in Wired Subsystems,
i.e., Wired Slave Racks and Remote Terminals
C120/C500
C1000H/
C2000H
4
2
8
32
64 (Repeater Unit required for
more than 32 Units.)
16 words
32 words
Number of Units Connected
2
4
6
8
Maximum Number of I/O Points
2,048
1,024 (expandable up to 2,048 points)
512
336 (expandable to 1,680 points)
256
=
+
+
+
+
Section
2-1
C200H*
8
2
8
–
16
5
9
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