Rockwell Automation 2755 Atomscan Bar Code Scanner - Manual (Page 36)

Chapter 5
Operating the Scanner
5–3
1. Place the bar code symbol where it can be read.
2. Assure that the scan line crosses all the bars and both quiet zones. Set up
the Enhanced Decoder to read the symbology of your bar code label.
3. Set it for “Continuous Trigger”, and monitor the “Decoder Performance”.
4. If the decoder is properly set for the symbology, and if the scanner is
aimed according to the instructions in this manual, the Decoder
Performance should be at or near 100%. If it is not, try to orient the
scanner to obtain a Decoder Performance greater than 80%.
5. Once the scanner is properly aimed and decoding has been verified, set
the decoder for “Triggered” operation, and run your system.
SUGGESTIONS:
•
Test scanner readability with a label that is known to be good, and log the
results.
•
Check label speed, length and height to ensure the minimum number of
scans per label required by your application.
•
Avoid excessive tilt, pitch and skew of the label as much as possible.
•
Clean the laser window regularly (see Chapter 6).
WARNINGS:
•
Recheck that decoder power is OFF before connecting or disconnecting
any of the interface cables:
Scanner to Adapter
Adapter to Decoder
Adapter to Package Sensor
Decoder to host
•
Make sure the scanner(s), decoder(s) and host system are all connected to
the same ground potential.
•
Do not aim the scanner into sunlight, reflectors, or other sources of light.
•
Do not obstruct the laser windows with mounting hardware or anything
else.
•
Make sure the temperature remains within the limits specified in
Appendix A.
Verifying Operation
Operational Tips