Denso BHT-200QW Specifikace stáhnout pdf (Strana 251)

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Chapter 14. Statement Reference

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• Only a single bar code device file can be opened at a time. The total number of files

which can be opened at a time is 16 including data files and communications device

files.

• The BHT cannot open the bar code device file and the IrDA interface of the

communications device file concurrently. If you attempt to open them concurrently, a

run-time error will occur. The BHT can open the bar code device file and the

direct-connect interface concurrently.

• The name of the bar code device file, BAR, may be in lowercase.

OPEN "bar :"AS #10 CODE "A"

• Alphabet letters to be used for readmode, beepercontrol, LEDcontrol and

readcode may be in lowercase.

• Up to eight readcodes can be specified.

• If you specify more than one condition for a same bar code type with readcode(s) ("I"

in the example below), all of those conditions are valid. The sam-ple below makes the

BHT read both of the 6- and 10-digit ITF codes.

OPEN "BAR:"AS #1 CODE "I:6","I:10"

OPEN "BAR:"AS #1 CODE "I:6,10"

• If you specify more than one readcode including "I" (ITF), then ITF codes less than 4

digits cannot be read unless numbers of digits are specified.





readmode

The BHT supports four read modes--the momentary switching mode, the auto-off mode,

the alternate switching mode, and the continuous reading mode, which can be selected by

specifying M, F, A, and C to readmode, respectively.

□

□□

□Momentary switching mode (M)

OPEN "BAR ：M"AS #7 CODE "A"

Only while you hold down the trigger switch

, the illumination LED

lights and the

BHT can read a bar code.

If the bar code device file becomes closed when the trigger switch

is helddown, the

illumination LED will go off.

Until the entered bar code data is read out from the barcode buffer, pressing the

trigger switch

cannot turn on the illumination LED

so that the BHT cannot read the

next bar code.

The trigger switch function is assigned to the magic keys.

The illumination LED may not come on where the environment is bright enough for

the BHT to scan.

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