User`s guide

2-16 Agilent 4155C/4156C VXIplug&play Driver User’s Guide, Edition 1
Driver Functions
hp4156b_error_message
hp4156b_error_message
This function translates the error return value from an instrument driver function to
a readable string.
Syntax ViStatus _VI_FUNC hp4156b_error_message(ViSession vi, ViStatus error_number,
ViChar _VI_FAR message[ ] );
Parameters vi Instrument handle returned from hp4156b_init( ).
error_number Error return value from the driver function.
message[ ] Error message string. This is limited to 256 characters.
hp4156b_error_query
This function returns the error numbers and corresponding error messages in the
error queue of a instrument. See If You Have a Problem manual for a listing of the
instrument error numbers and messages.
Instrument errors may occur when you places the instrument in a bad state such as
sending an invalid sequence of coupled commands. Instrument errors can be
detected by polling. Automatic polling can be accomplished by using the
hp4156b_errorQueryDetect function.
Syntax ViStatus _VI_FUNC hp4156b_error_query(ViSession vi, ViPInt32 error_number,
ViChar _VI_FAR error_message[ ] );
Parameters vi Instrument handle returned from hp4156b_init( ).
error_number Instrument’s error code.
error_message[ ] Instrument’s error message. This is limited to 256 characters.