MicroLogix 1000: addressing data files

For the purposes of addressing, each data file type is identified by a letter (identifier) and a file number.
File Type
Identifier
File Number
Output
O
0
Input
I
Status
S
Bit
B
Timer
T
Counter
C
The addresses are made up of alphanumeric characters separated by delimiters. Delimiters include the colon, slash, and period.
You assign logical addresses to instructions from the highest level (element) to the lowest level (bit). The following sections explain how the file type determines the address format. Following are examples and descriptions of typical addresses:
N7:15
 Element Address
N
File Type (Integer)
7
File Number
:
Element Delimiter
15
Element
T4:7.ACC
 Word Address
T
File Type (Timer)
4
File Number
:
Element Delimiter
7
Element
.
Word Delimiter
ACC
Word
B3:31/15
 Bit Address
B
File Type (Bit)
3
File Number
:
Element Delimiter
31
Element
/
Bit Delimiter
15
Bit
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