Keithley 6487 Reference Manual page 189

Model 6487 Reference Manual
F) TST? — self-test query
Use this query command to perform a checksum test on ROM. The command places the
coded result (0 or 1) in the output queue. When the Model 6487 is addressed to talk, the
coded result is sent from the output queue to the computer.
A returned value of zero (0) indicates that the test passed and a value of one (1) indicates
that the test failed.
G) WAI — wait-to-continue
Effectively, the *WAI command is a No-Op (no operation) for the Model 6487 and thus,
does not need to be used.
Two types of device commands exist:
•
•
The *WAI command is used to suspend the execution of subsequent commands until the
device operations of all previous overlapped commands are finished. The *WAI command
is not needed for sequential commands.
Sequential commands — A command whose operations are allowed to finish
before the next command is executed.
Overlapped commands — A command that allows the execution of subsequent
commands while device operations of the overlapped command are still in
progress.
Common Commands
Run self-test and read result
Wait until previous commands are completed
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