Denso Power Net Terminal BHT-7500 Dokumentacja Pobierz pdf (Strona 230)

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Syntax:

FIELD [#]filenumber,fieldwidth AS fieldvariable

[,fieldwidth AS fieldvariable...]

Parameter:

filenumber

A numeric expression which returns a value from 1 to 16.

fieldwidth

A numeric expression which returns a value from 1 to 254.

fieldvariable

A non-array string variable.

Description:

FIELD declares the length and field variable of each field of a record in a data file.

• filenumber is the file number of a data file opened by the OPEN statement.

•

fieldwidth is the number of bytes for a corresponding field variable.

• You can assign a same field variable to more than one field.

• There is no difference in usage between a field variable and a general variable

except that no register variable, common variable, or array variable can be used

for a field variable.

• A record can contain up to 16 fields. The total number of bytes of all

field-

width

s plus the number of fields should not exceed 255.

• If a

FIELD statement executes for an opened file having the number of fields or

field width unmatching that of the

FIELD specifications except for field variables,

a run-time error will occur.

• If more than one FIELD statement is issued to a same file, the last one takes

effect.

File I/O statement

FIELD

Allocates string variables as field variables.

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