Rockwell Automation 57C570 AutoMax PC3000 User Manual - Manual (Page 63)

4Ć5
Figure 4.2 shows the relationship between an I/O terminal and its
location in the PC3000's memory.
rack number 01
I/O group number 5
15 14 13 12 11 10 09 08 07 06 05 0403 02 0100
Input Module
(1771ĆIAD)
A
B
C
D
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
E
Output Module
(1771ĆOAD)
Input Image Table
Output Image Table 00
05
07
00
04
07
word
address
rack number 01
I/O group number 4
04
[ [
A
B
C
D
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
E
15 14 13 12 11 10 09 08 07 06 05 0403 02 0100
15 14 13 12 11 10 09 08 07 06 05 0403 02 0100
NOTE: I/O terminals are numbered in octal.
Figure 4.2 Ć Sample I/O Terminal Memory Mapping
The next section explains the available addressing methods, which
let you define the relationship between an I/O chassis slot and an
I/O group (16 input bits and 16 output bits).
4.2.2 Choosing an Addressing Method
For each I/O chassis in your system, you must define how many I/O
chassis slots make up an I/O group (1 word each in the input image
table and output image table). This choice is the chassis'
addressing method. You must define the addressing method for
each remote I/O chassis in your system by setting a switch, which is
located on the I/O chassis or on the adapter module. For specific
information, see the equipment's user manual. See section 4.6.3 in
this manual for information about recommended switch settings.