Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 90)

7–2 Configuration: Scanner Control, Primary Match Table, Discrete I/O
Publication 2755-833
Laser Light (Scanners A and B)
Field Type Options
Select
On
Triggered
Off
Determines whether the Scanner A laser is on continuously, turns on
and off with the trigger, or is off regardless of the trigger. Use
triggered mode with slower package rates to extend the life of your
laser.
This parameter also affects Scanner B when it is set to operate in
coordinated mode with Scanner A. See Scanning Mode under
Scanner B Control.
On The scanner scans continuously.
Triggered The scanner scans only when receiving a trigger
from a package detector, host, or internal timer. The
scanner continues scanning until an end trigger
condition occurs.
Off Turns the scanner laser off. Use this setting as a
safety precaution during decoder maintenance or
troubleshooting.
Important: It is important that you understand the following terms
before proceeding.
•
valid scan
•
valid symbol
•
valid read
•
valid package
•
no-read
See Glossary for definitions.
Decode Mode
Field Type Options
Select
Continuous
Continuous/Unique
Package Detect
Host
Internal Timer
Determines how the decoder starts and stops decoding. This
parameter affects Scanner A, or Scanner A and B when both are
operating in coordinated mode. (See Scanning Mode under Scanner
B Control.)