Channel And End Station Setting - Omron SYSMAC C Series User Manual

Channel and end station
setting
Note:
For details on the optical-fiber cable, refer to the user's manual for the
SYSMAC-C Series optical-fiber cable.
For the I/O link unit to operate, it must be designated as one of the
input/output channels of the PC in which the remote I/O master unit is
instalied. This channel setting is carried out using the DIP switch in the I/O
ink unit.
A maximum of 16 I/O link units can be connected to a remote I/O master
unit. However, the combined number of I/O points of the connected 1/0
ink units cannot exceed the 1/O point limit of the PC in which the remote
/O master unit is installed. (If the C500 is used, the maximum number of
/O points is 512; for the C120, the maximum is 256).
n addition to the I/O link units, remote I/O slave units and optical
transmitting I/O units can also be connected to the remote I/O master unit.
The remote I/O siave unit and optical transmitting I/O units are peripherals
used with the higher-level SYSMAC-C Series PCs, and cannot be used
alone with the C20. See the user manuals of these PCs for information on
those devices.
The network of interrelated components is governed by PC in which the
remote |/O master unit is installed using a system of channel designation,
which is explained next.
The channels of the input and output units connected to the PC (either the
CPU alone, or the CPU with one or two expansion I/O units) are
automatically assigned starting from channel 00. You must assign the
channel number of each of the I/O link units and optical transmitting I/O
units, however. When doing this, you must make sure that no channel
designations overlap—the same channel should not be assigned to two
different devices.
There's a technique you can use to keep this from happening. When
assigning the channels for those devices, start with the highest channel
number—channel 31—and assign the following channels decrementing
for each one.
Of the I/O link units connected to the remote I/O master unit, the I/O link
unit which is physically the furthest from the remote I/O master unit serves
as the end station. When you assign channel numbers and must
designate the "end station" keep in mind that this is a physical description
and is not related to the size of the channel number. Channel 31 may or
may not actually be the end station.