5
System Overview and Features Section 1-1
1-1-3 Communications Modes
Both High-speed Communications Mode and the Long-distance Communica-
tions Mode are supported by the CompoBus/S.
The communications distance and the connection configuration vary with the
communications mode and communications cable.
Note The I/O response time may be slower when using Long-distance Communica-
tions Mode compared with High-speed Communications Mode. Refer to
2-5 I/
O Response Time Characteristics
.
Item High-speed Communica-
tions Mode
Long-distance Communi-
cations Mode
Communications baud
rate
750 kbps 93.75 kbps
Communications cycle
time
0.5 ms or 0.8 ms (depending
on maximum number of I/O
points)
4.0 ms or 6.0 ms (depend-
ing on maximum number of
I/O points)
Cable High-speed Communications
Mode
Long-distance Communica-
tions Mode
2-conductor
VCTF cable
Length of main line: 100 m max.
Length of branch line: 3 m max.
Total length of branch lines:
50 m max.
Length of main line: 500 m max.
Length of branch line: 6 m max.
Total length of branch lines:
120 m max.
4-conductor
VCTF cable
Length of main line: 30 m max.
Length of branch line: 3 m max.
Total length of branch lines: 30 m
max.
Flexible branching, provided that
the total length of cable is a maxi-
mum of 200 m.
Special Flat
Cable
Length of main line: 30 m max.
Length of branch line: 3 m max.
Total length of branch lines:
30 m max.
Flexible branching, provided that
the total length of cable is a maxi-
mum of 200 m.
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