Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 128)

Publication AG-UM008C-EN-P - February 2005
3-60 Configuring MicroLogix 1100/1200/1500 Controllers
Number of Records
Using Queue 0 as an example, each record consumes:
In this example, each record consumes 18 bytes. So if one queue was
configured, the maximum number of records that could be stored
would be 2730. The maximum number of records is calculated by:
Maximum Number of Records = Data Log File Size/Record Size
= 48K bytes/18 bytes
= (48)(1024)/18
= 2730 records
Example Queue 5
Record Field Memory Consumption
Date 2 bytes
Time 2 bytes
N7:11 2 bytes
L14:0 4 bytes
T4:5.ACC 2 bytes
I1:3.0 2 bytes
B3:2 2 bytes
Integrity Check 2 bytes
Total 18 bytes
Table 3.12 Queue 5 (Time = ✔, Delimiter = TAB)
Time N7:11 I1:3.0 I1:2.1
Record 0 20:00:00 TAB 2315 TAB 8190 TAB 4465
Record 1 20:30:00 TAB 2400 TAB 8210 TAB 4375
Record 2 21:00:00 TAB 2275 TAB 8150 TAB 4335
Record 3 21:30:00 TAB 2380 TAB 8195 TAB 4360
Record 4 22:00:00 TAB 2293 TAB 8390 TAB 4375
Record 5 22:30:00 TAB 2301 TAB 8400 TAB 4405
Record 6 23:00:00 TAB 2308 TAB 8100 TAB 4395