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CompoBus/S I/O Link Units Section 7-6
Operating Procedure
Connecting the
CompoBus/S I/O Link Unit
CompoBus/S I/O Link Units are connected to the CP1L CPU Unit. For CP1L
M-type CPU Units, up to three Units can be connected, including any other
Expansion Units and Expansion I/O Units that are also connected. The Units
can be connected in any order from the CPU Unit.
I/O Allocation
I/O words are allocated to the CompoBus/S I/O Link Unit in the same way as
to other Expansion Units and Expansion I/O Units, i.e., the next available input
and output words are allocated. As shown below, when “m” is the last allo-
cated input word and “n” is the last allocated output word, the CompoBus/S I/
O Link Unit is allocated “m+1” as its input word and “n+1” as its output word.
In the following example, a CompoBus/S I/O Link Unit is connected as the first
Unit after the CP1L CPU Unit.
Connect the Unit.
Determine the node
address of the
CompoBus/S I/O Link Unit
and set the DIP switch.
Wire the CompoBus/S
transmission path.
• Connect the CompoBus/S I/O Link Unit.
• The node number should be a unique number between
0 and 15.
• Use the DIP switch to set the CompoBus/S I/O Link
Unit fs node number, communications mode, and the
status of output data when a communications error
occurs.
• Connect the CompoBus/S I/O Link Unit to a
CompoBus/S transmission path.
BD L NC( BS-) N C
BD H NC( BS+
)
S
COMM
ERR
ON
12 3
4
5
6
No
.
SRT21
EXP
SYSMAC
CP1L
L1 L2/N
COM 01 03 05 07 09 11 01 03 05 07 09 11
00 02 04 06 08 10 00 02 04 06 08
10
00 01 02 03 04 06 00 01 03 04 06
COM COM COM COM 05 07 COM 02 COM 05
07
IN
OUT
CompoBus/S I/O Link Unit
CP1L M-type CPU Unit
Word m+1
CompoBus/S I/O Link Uni
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