Rockwell-automation 2708-NBD VBASIC Language Development Kit Instrukcja Użytkownika Pobierz pdf (Strona 61)

A-B VBASIC and Visual BASIC

Appendix B

Differences Between

B–13

OCT$(numeric–expression)

Returns a string representing the octal value of the numeric argument. See

also HEX$().

ON expression GOSUB {line–number–list/line–label–list}

ON expression GOTO {line–number–list/line–label–list}

Branches to one of several specified lines, depending on the value of an

expression. See VBDOS manual for detailed information.

N = 3

ON N GOSUB GetTime, GetDate, GetLost ‘Will gosub GetLost.

OPEN file [FOR mode1][ACCESS] AS[#]filenum [LEN=reclen]

Enables I/O to a file or device. All VBDOS manual references to databases

and ISAM are unsupported in A-B VBASIC. The LOCK clause is not

supported. See the chapter on Special Devices for details on OPENing

specific devices.

TYPE EmpType

Badge AS STRING * 8

Name AS STRING * 25

END TYPE

DIM SHARED Emp AS EmpType

OPEN “EMPLOYEE” FOR RANDOM AS #1 LEN = LEN(Emp)

POS(0)

Returns the current horizontal position of the cursor on the LCD display. A

single argument is required but is ignored at run–time.

Col = POS(0)

LOCATE 1, Col

PRINT [expressionlist][{,|;}]

Outputs data to the LCD display. The format for some values may vary

between VBDOS and A-B VBASIC. A-B VBASIC divides the line into

print zones of 8 spaces each. A semicolon at the end of the print statement

keeps the cursor from advancing to the next line.

PRINT “Enter your name: “;

LINE INPUT; Name$

PRINT #filenumber,[USING stringexpression;] expressionlist[{,|;}]

Writes data to a file in memory. A print field width is 8 characters for the

LCD, 14 for others. See the chapter on Special Devices for details on specific

devices.

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 83 84

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Rockwell-automation 2708-NBD VBASIC Language Development Kit Instrukcja Użytkownika Strona 61