Ir Word Allocation - Omron SYSMAC C200H Installation Manual

IR Word Allocation

4-1 IR Word Allocation
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Each slot of the Backplane is assigned a hardware word number. This word is
accessible for I/O use only in the given slot. However, standard I/O Units are
available in 5-, 8-, 12-, and 16-point models. If an I/O Unit other than a 16-point
model is mounted, the unused points of that word are accessible only as "work
bits" (refer to the C200H Operation Manual). The number of I/O bits available for
the entire system, therefore, varies according to the model of I/O Units used, as
well as the model of Backplanes used. The figure below shows the relationship
between the model of I/O Unit and work bits. The shaded bits can only be used
as work bits.
5-point Unit 8-point Unit
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
12-point Unit
00 00
01 01
02 02
03 03
04 04
05 05
06 06
07 07
08 08
09 09
10 10
11 11
12 12
13 13
14 14
15 15
Section 4-1
16-point Unit
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15