Omron SYSMAC C20K Operation Manual page 27

Internal Relay (IR) Area
I/O Bits Available in
Expansion I/O Units
Model Input bits
Word (n+1)
00 08
01 09
02 10
C20P
03 11
04
Cannot
05
be
used.
06
07
Word (n+1)
00 08
01 09
02 10
C28P
03 11
04 12
05 13
06 14
07 15
Word (n+1)
00 08
01 09
02 10
C40P
03 11
04 12
05 13
06 14
07 15
Word (n+1)
00 08
01 09
02 10
03 11
C60P
04 12
05 13
06 14
07 15
The following table shows which bits can be used as I/O bits in each of the
Expansion I/O Units. Bits in the shaded areas can be used as work bits but
not as output bits. The word addresses depend on the CPU that the Expan-
sion I/O Unit is coupled to. In all cases the first Expansion I/O Unit address
for input and output words is one more than the last CPU address for input
and output words. For example, the last CPU word address for a C40K CPU
is 03 and hence the first input or output word address for any of the Expan-
sion I/O Units coupled to a C40K CPU will be 04. In the tables below "n" is
the last CPU word allocated as an input or output word.
There are several models for some of the Units listed below. A blank space
(_) in the model number indicates that any of the applicable model numbers
could be inserted here.
Output bits
Word (n + 2)
00 08
01 09
02 10
03 11
04 12
05 13
06 14
07 15
Word (n + 2)
00 08
01 09
02 10
03 11
04 12
05 13
06 14
07 15
Word (n + 3) Word (n + 2)
00 00 08
01 01 09
02 02 10
Cannot
03 03 11
be
used.
04 04 12
05 05 13
06 06 14
07 07 15
Word (n + 3) Word (n + 2)
00 08 00 08
01 09 01 09
02 10 02 10
03 11 03 11
04 12 04 12
05 13 05 13
06 14 06 14
07 15 07 15
indicates words that cannot be used for I/O,
but can be used as work bits.
C16P
-O -
Word (n + 4)
00 08
01 09
02 10
03 11
C4K-I
04 12
05 13
06 14
07 15
Word (n + 4)
00 08
01 09
02 10
03 11
C4K-O
04 12
05 13
06 14
07 15
C4K-TM
Section 3-3
Model Input bits Output bits
Word (n + 1)
00 08
01 09
02 10
03 11
C16P
04 12
-I -
05 13
06 14
07 15
Word (n + 1)
00
01
02
03
04
05
06
07
Word (n + 1)
00
01
02
03
Cannot
be used
Word (n + 1)
00
01
02
03
04
05
06
07
Word (n + 1) Word (n + 2)
00 00
01 01
02 02
03 03
04
Cannot
05
be used
06
07
08
09
10
11
12
13
14
15
08
09
10
11
12
13
14
15
08
09
10
11
12
13
14
15
15