Starting Your Processor
Chapter 5
5-9
Assigning I/O Rack Numbers
When you select 2-slot addressing, each pair of slots (one I/O group) is
assigned to the corresponding pair of words in the input and output image
tables. You assign one I/O rack number to eight I/O groups (Figure 5.7).
Figure 5.7
I/O Image Table and Corresponding Hardware for One Assigned Rack
Number for 2Slot Addressing
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
I O
I O
I O
I O
I O
I O
I O
I O
0
1
2
3
4
5
6
7
13075
input image table
word #
output image table
When you select 2slot addressing, each pair of
slots is assigned an input image table word and an
output image table word.
word #
