3
System Overview and Features
Section 1-1
Input Slave
1-1-2
Network Features
The CompoBus/S has the following features.
Communications Modes
Select either a High-speed Communications Mode or Long-distance Commu-
nications Mode for the CompoBus/S according to the system configuration.
The differences between the High-speed Communications Mode and the
Long-distance Communications Mode are described in
Flexible Wiring Up to
200 m
In Long-distance Communications Mode, flexible wiring is possible up to a
total cable length of 200 m with no restrictions on branching or node connec-
tions, provided that 4-conductor VCTF cable or Special Flat Cable is used.
Long-distance
Communications Up to
500 m
In Long-distance Communications Mode, communications over the main line
of up to 500 m are possible to control I/O devices in a wide area, provided that
2-conductor VCTF cable is used. In this case, however, each branch line can
be connected to a single Slave only, because the branch line cannot be fur-
ther branched. Furthermore, the Master must be connected to either end of
the main line.
High-speed
Communications
In High-speed Communications Mode, up to 16 Slaves with 128 I/O points
can be connected with a high-speed communications cycle time of only
0.5 ms. This cycle is fast enough for time-critical factory automation applica-
tions.
Water-resistance Slaves
Water-resistant Terminals (IP67) can be used as Slaves to exchange I/O in
places exposed to water. Water-resistant Terminals are, however, available
only when the communications cable is 4-conductor VCTF cable.
Reduced Wiring
A Slave can be connected to a Master or another Slave with just one connect-
ing cable. If the 4-wire Special Flat Cable or 4-conductor VCTF cable is used,
the Slave’s communication power supply is also supplied through the cable,
so floor wiring can be reduced dramatically. Also, special connectors simplify
branching from a main cable.
Word
Bit
00 to 07
08 to 15
00 to 07
08 to 15
00 to 07
08 to 15
to
00 to 07
08 to 15
00 to 07
08 to 15
00 to 07
08 to 15
00 to 07
08 to 15
to
00 to 07
08 to 15
00
01
02
03
04
05
to
14
15
00
01
02
03
04
05
to
14
15
CIO
2000
CIO
2001
CIO
2002
CIO
2007
CIO
2008
CIO
2009
CIO
2010
CIO
2015
to
to
OUT
data
IN
data
Node number
CPU Unit's I/O Area
Output
Input
OUT node 0
8-point Output Slave
OUT node 2
16-point Output Slave
OUT node 4
8-point Output Slave
IN node 0
8-point Input Slave
IN node 2
32-point Input Slave
IN node 14
16-point Input Slave
Example settings using CJ1W-SRM21 Master
Unit with unit #00, connected to 32 Slaves.
IN/OUT node1
8-point Input/
8-point Output
Slave
