Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
Recipe and Data Logging 521
For queue 5, the formatted string length is 29 characters, as shown below:
= 8 + 1 + 6 + 1 + 6 + 1 + 6 = 29 characters
Number of Records
Using Queue 5 as an example, each record consumes:
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
= 128K bytes/10 bytes
= (128)(1024)/10
= 13107 records
Data Memory Consumed Formatted String Size
delimiter 0 bytes 1 character
word 2 bytes 6 characters
long word 4 bytes 11 characters
date 2 bytes 10 characters
time 2 bytes 8 characters
string 84 bytes 89 characters
float 4 bytes 13 characters
Data Time N7:11 I1:3.0 I1:2.1
Characters 8 1 6 1 6 1 6
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
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes