
3.I/O LINK B-63983EN/02
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3.2.7 Assignment Method for an AS-i Converter Unit
An I/O Link-AS-i converter unit converts I/O from the I/O Link to the
AS-Interface (called AS-i below) to enable the use of AS-i slave
module DI/DO signals as a standalone unit.
The AS-i comes in two main versions: Ver 2.0 and Ver 2.1. Two
types of I/O Link-AS-i converter units are available for each of these
versions.
An I/O Link-AS-i converter unit for Ver 2.0 differs from that for Ver
2.1 in the following points.
For Ver 2.0 For Ver 2.1
Number of
input/output points
256 input points/256 output
points
512 input points/512 output
points
Occupied groups 1 group Contiguous 2 groups
For each version, an example of connection is shown and the
assignment method is described below.
Example of connection for Ver 2.0
I/O Link
master
I/O Link-AS-i
converter unit for
Ver 2.0
Group 0
Group 1
Operator's panel
connection unit
AS-i power
supply
AS-i slave AS-i slave
Assignment method for Ver 2.0
For the group number ([GROUP]), set the group number used in the
configuration. (Set 0 for the above example of connection.)
For the base number ([BASE]), always set 0.
For the slot number ([SLOT]), always set 1.
An I/O Link-AS-i converter unit occupies 256 points (32 bytes) for
both input and output. Therefore, the assignment names are as
follows.
Input device assignment name Output device assignment name
OC03I OC03O