HP 8924C - Page 293

293
S:\HP8924C\USRGUIDE\BOOK\CHAPTERS\ibasic.fb
Chapter 6, IBASIC Controller
PROGram Subsystem
If an attempt is made to query the value of a numeric variable or array and no
IBASIC program is in the Test Set an
IBASIC Error: -283 Illegal
variable name
is generated. If an attempt is made to query the value of a
numeric variable or array and the variable specified in <varname> does not exist
in the program an
IBASIC Error: -283 Illegal variable name is
generated.
Syntax
PROGram[:SELected]:NUMBer? <varname>
NOTE: The program commands and syntax used to enter data from the Test Set into the external
controller will depend upon the programming language used in the external controller.
Considerations such as type conversion (integer to real, real to complex, etc.), the sequence in
which values are entered into arrays, the capability to fill an entire array with a single enter
statement, etc. will depend upon the capabilities of the programming language used in the
external controller. The examples which follow represent the capabilities of HP Rocky
Mountain BASIC programming language running on an HP 9000/300 Series Controller.
Example querying the value of a simple variable
OUTPUT 714;"PROGram:SELected:NUMBer? Variable"
ENTER 714;Value
or
OUTPUT 714;"PROG:NUMB? Variable"
ENTER 714;Value
This example assumes that the variable named Value in the ENTER statement is the same
type as the variable named Variable in the IBASIC program.
Example querying the value of a one dimensional array [Array(5)] with 6 elements
OUTPUT 714;"PROGram:SELected:NUMBer? Array"
ENTER 714;Result_array(*)
or
OUTPUT 714;"PROG:NUMB? Array"
ENTER 714;Result_array(*)
This example assumes that the array named Result_array(*) in the ENTER statement is di-
mensioned exactly the same as the array named Array in the IBASIC program.
NOTE: Individual array elements cannot be queried with the :NUMBer? command.