Publication 1763-RM001C-EN-P - October 2009
Recipe and Data Logging
439
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 1100
35.9
μ
s + 2.5
μ
s/data stamp +
1.9
μ
s/time stamp + 1.9
μ
s/
word 4.3
μ
s/long
word logged
7.5
μ
s
IMPORTANT
You must configure a data log queue before
programming a DLG instruction into your ladder
program.
Data Log
queue number
0
DLG
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive