Agilent Technologies 4288A Programming Manual page 98

Avoiding Mistakes Related to Work and Daily Checks
Avoiding Mistakes Related To Work
Figure 8-1 SRQ generation sequence (when an error occurs)
Sample program
Example 8-1 shows a sample program to detect the occurrence of an error using SRQ. This
program is stored on the sample program disk under the filename "srq_err.bas".
This program sets up SRQ, intentionally sends a nonexistent command for the 4288A to
generate an error, and performs error handling. In the error handling, the program checks
which error has occurred, displays the error number and error message, and displays the
"PROGRAM INTERRUPT" message.
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Sets the GPIB address.
Enables bit 2, bit 3, bit 4, and bit 5 of the standard event status register
and sets bit 5 of the service request enable register to 1.
Clears the status byte register, standard event status register, and error
queue.
Sets the branch destination of the SRQ interrupt and enables SRQ
interrupt.
Selects the primary parameter and secondary parameter. However,
because the command for the secondary parameter is wrong, an error
occurs.
Processing when an error occurs. Reads out the error number and error
message of the error that has occurred.
Displays the "Error occurred!!" message, error number, error message,
and "PROGRAM INTERRUPT!!" message.
Displays the "PROGRAM DONE" Message. Notice that this message
is not displayed unless you correct and execute the secondary
parameter selection command.
Chapter 8