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efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
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Recipe and Data Logging
Publication 1763-RM001C-EN-P - October 2009
Data
Memory Consumed
delimiter
0 bytes
word
2 bytes
long word
4 bytes
date
2 bytes
time
2 bytes
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
Memory Consumption
Time
2 bytes
N7:11
2 bytes
I1:3.0
2 bytes
I1:2.1
2 bytes
Integrity Check
2 bytes
Total
10 bytes
Each record consumes 10 bytes. So if only one queue was configured, the
maximum number of records that could be stored would be 13107. The
maximum number of records is calculated by:
Maximum Number of Records = Data Log File Size/Record Size
Formatted String Size
1 character
6 characters
11 characters
10 characters
8 characters
I1:3.0
I1:2.1
1
6
1
6
= 128K bytes/10 bytes
= (128)(1024)/10
= 13107 records
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