Rockwell Automation 1791-IOBB USER MANUAL User Manual
Page 23
Configuring Your Block I/O for PLC
Family Programmable Controllers
Chapter 4
4Ć3
Table 4.B
PLC-3 and PLC-5/250 I/O Rack Addressing
I/O Rack
Switch Number
I/O Rack
Switch Number
Number 3
4
5
6
Number
3
4
5
6
0
On (Closed)
On (Closed)
On (Closed)
On (Closed)
10
On (Closed)
On (Closed)
On (Closed)
Off (Open)
1
Off (Open)
On (Closed)
On (Closed)
On (Closed)
11
Off (Open)
On (Closed)
On (Closed)
Off (Open)
2
On (Closed)
Off (Open)
On (Closed)
On (Closed)
12
On (Closed)
Off (Open)
On (Closed)
Off (Open)
3
Off (Open)
Off (Open)
On (Closed)
On (Closed)
13
Off (Open)
Off (Open)
On (Closed)
Off (Open)
4
On (Closed)
On (Closed)
Off (Open)
On (Closed)
14
On (Closed)
On (Closed)
Off (Open)
Off (Open)
5
Off (Open)
On (Closed)
Off (Open)
On (Closed)
15
Off (Open)
On (Closed)
Off (Open)
Off (Open)
6
On (Closed)
Off (Open)
Off (Open)
On (Closed)
16
On (Closed)
Off (Open)
Off (Open)
Off (Open)
7
Off (Open)
Off (Open)
Off (Open)
On (Closed)
17
Off (Open)
Off (Open)
Off (Open)
Off (Open)
Table 4.C
PLC-5 I/O Rack Addressing
I/O Rack Switch Number
I/O Rack Switch Number
Number 3
4
5
6
Number
3
4
5
6
01
Off (Open)
On (Closed)
On (Closed)
On (Closed)
10
On (Closed)
On (Closed)
On (Closed)
Off (Open)
02
On (Closed)
Off (Open)
On (Closed)
On (Closed)
11
Off (Open)
On (Closed)
On (Closed)
Off (Open)
03
Off (Open)
Off (Open)
On (Closed)
On (Closed)
12
On (Closed)
Off (Open)
On (Closed)
Off (Open)
PLC-5/15 processors can scan racks 01-03
13
Off (Open)
Off (Open)
On (Closed)
Off (Open)
04
On (Closed)
On (Closed)
Off (Open)
On (Closed)
14
On (Closed)
On (Closed)
Off (Open)
Off (Open)
05
Off (Open)
On (Closed)
Off (Open)
On (Closed)
15
Off (Open)
On (Closed)
Off (Open)
Off (Open)
06
On (Closed)
Off (Open)
Off (Open)
On (Closed)
16
On (Closed)
Off (Open)
Off (Open)
Off (Open)
07
Off (Open)
Off (Open)
Off (Open)
On (Closed)
17
Off (Open)
Off (Open)
Off (Open)
Off (Open)
PLC-5/25 processors can scan racks 01-07
PLC-5/40 and 5/60 processors can scan racks 01-17
Each block uses 2 words of output image table memory and 2 words of
input image table memory. Each block occupies 1/4 rack of data table, with
4 blocks comprising 1 logical rack. Image table usage for one assigned
rack number is shown in Figure 4.2 (IOBA) and Figure 4.4 (IOBB). An
example of image table usage is shown in Figure 4.3 (IOBA) and
Figure 4.5 (IOBB).