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IC-485S/IC-485SI
3 OPERATION
OPERATION
The IC-485S
&
IC-485SI supports 4 kinds of
functions in 6 kinds of configurations. They are
1. Point-to-Point
Point-to-Point configuration means two devices
which locate at two different places can be linked
together to communicate through a couple of IC-485
devices.
1.1 Point-to-Paint/4-Wire Full Duplex( Fig.
3-
1
)
1.2 Point-to-Pointi2-Wire Half Duplex( Fig. 3-2
)
2. Multidrop
Multidrop configuration means that more than
two devices can be linked all together to communi-
cate one another through many IC-485 devices. In
this configuration, one of the IC-485 devices will be
connected to a master device and the rest of IC-485
devices will be connected to many other slaver de-
vices.
2.1
Multidrop/4-Wire
Full Duplex( Fig. 3-3
)
2.2 Multidrop/2-Wire Half Duplex( Fig. 3-4
)
3. Simplex/Transmit, Receive
Only(
Fig. 3-5 )
6
User’s Manual
OPERATION
IC-485S/IC-485SI
Simplex configuration means that more than two
devices can be linked all together to communicate
through many
IC-485
devices. Its configuration is
like the Multidrop’s, but the master device can talk
only
and
the
slaver devices can listen only.
4.
Monitor
Mode(
Fig. 3-6
)
(for IC-485S only)
Monitor
configuration means a IC-485s device
can
be
wir
ed
to
the lines of RS-485 or RS-422 devices
to monitor the line signals. In this configuration the
IC-485S
will change the function of T+ and T- to
R’
:
:cncl
P‘
r
espectively
Before
operating,
user must complete the instal-
lation
according
to the procedure mentioned in
Sec-
tion
2-
1
Once
the
installation
had been done, the device
should
operate
as
the
setting function.