Allen-Bradley PLC-5 User Manual

Publication 1785-UM012D-EN-P - July 2005
Addressing I/O and Controller Memory 4-23
The following examples illustrate these concepts:
Bit address example
O 32
I 32
B 64
T 32
C 32
R 32
N 32
If your data table map looks like this:
256
An address used in an OTE instruction stored here:
occupies one word in the controller's memory
executes at a rate 0.48µs
end
The same address stored here:
occupies two words in the controller's memory
executes at a rate 0.64µs
This example uses the instruction timing and memory usage tables in Appendix D. Consult these tables
for information about other instructions.
1
12
OTE XX
OTE
Element address example
O 64
I 64
B 1000
T 100
C 100
N 720
2048
end
Addresses used in a MOV instruction stored here
occupy three words in the controller's memory.
MOV N7:0
N7:1
MOV XX YY
123
The same addresses stored here occupy five
words in the controller's memory.
MOV N100:0
N100:1
MOV XX XX YY YY
12345
This example uses the instruction timing and memory usage tables in Appendix D. Consult these tables
for information about other instructions.
Y
our data table map looks like this:

Allen-Bradley PLC-5 Specifications

General

Brand	Allen-Bradley
Model	PLC-5
Category	Controller
Language	English