Opticon NFT 2135 ユーザーズマニュアル

Manual No. 25-NFT1121-01

Series NFT-1121/2135 Mini CCD Fixed Position Scanners

Tips for Verifying the Presence of a Bar Code

If the scanner is operated in the trigger enabled mode and the trigger is activated, one of three conditions

may occur:

In some applications, when no data is transmitted, it may be important to know why. Was there a bar code

present that could not be decoded, or was no bar code present at all?

This requirement is common in applications such as automated blood analysis equipment. Test tubes containing

blood samples from many different people are loaded into a rack for automatic analysis. The bar code on each

tube ties that sample and the results back to a specific individual. If no bar code data is transmitted it is critical

to understand the reason.

Your Opticon scanner, when operated in the Trigger Enabled mode, can be programmed to transmit an error

message which indicates whether or not a bar code was present. The following table shows the message that

will be transmitted for each condition.

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A bar code is scanned and decoded

Decoded data is transmitted

A bar code is scanned but is not

decoded (e.g., print quality was poor)

No data is transmitted

No bar code is present

No data is transmitted

Presence/Absence of bar code

Scanner Transmits

Bar code was present and correctly decoded

Decoded Data

No bar code was present

Bar code was present but could not be decoded