Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
Recipe and Data Logging 525
4. After entering all the information for the data log queue, click on
OK. The queue is added to the Data Log Que window with a
corresponding queue number. This is the queue number to use in
the DLG instruction.
DLG - Data Log
Instruction
Instruction Type: output
The DLG instruction triggers the saving of a record. The DLG instruction
has one operand:
Queue Number - Specifies which data log queue captures a record.
The DLG instruction only captures data on a false-to-true rung transition.
The DLG rung must be reset (scanned false) before it will capture data
again. Never place the DLG instruction alone on a rung. It should always
have preceding logic, as shown below:
DLG
Data Log
queue number 0
DLG
Execution Time for the DLG Instruction
Controller When Rung Is:
True False
MicroLogix 1400 8.9910 µs 2.6050 µs
IMPORTANT
You must configure a data log queue before programming a DLG instruction
into your ladder program.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive

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