Allen-Bradley MicroLogix 1200 Reference Manual page 337

For queue 5, the formatted string length is 29 characters, as shown below:
Data Time N7:11
Characters 8 1 6
= 8 + 1 + 6 + 1 + 6 + 1 + 6 = 29 characters
Number of Records
Using Queue 5 as an example, each record consumes:
Record Field
Time
N7:11
I1:3.0
I1:2.1
Integrity Check
Total
Each record consumes 10 bytes. So if only one queue was configured, the
maximum number of records that could be stored would be 4915. The
maximum number of records is calculated by:
Maximum Number of Records = Data Log File Size/Record Size
Data Logging (MicroLogix 1500 1764-LRP Processor only)
I1:3.0 I1:2.1
1 6 1 6
Memory Consumption
2 bytes
2 bytes
2 bytes
2 bytes
2 bytes
10 bytes
= 48K bytes/10 bytes
= (48)(1024)/10
= 4915 records
22-5
Publication 1762-RM001C-EN-P