Rockwell Automation 2707-NP2 MICROVIEW SOFTWARE PROGRAMMING MANUAL - Manual (Page 128)

Publication 2707-PM002B-EN-P
D-4 MicroLogix Data Formats
ASCII ASCII data formats are fields up to 16 characters long. Each 16 bit
address may contain two ASCII characters (1 byte each). The lowest
byte of the base address stores the first character, the highest byte
stores the second character, the first byte of the next sequential
address stores the third character, and so on. The data held in this
range of addresses is expected to be ASCII data.
Note: The ASCII data format is very useful for controller applications.
Char #2 Char #1
address 1
Char #4 Char #3
address 2
Char #6 Char #5
address 3
Char #8 Char #7
address 4
Char #10 Char #9
address 5
Char #12 Char #11
address 6
Char #14 Char #13
address 7
Char #16 Char #15
address 8
ASCII Data Field
Maximum 16 Characters - Eight 16 addresses