IEEE-488 Reference
4-72
Note that when a limit test (LIMIT 1 or LIMIT 2) is enabled, the digital output port cannot be
controlled from the Source subsystem.
When LIMIT 1 or LIMIT 2 is disabled, the respective limit tests will, of course, not be included
in the test sequence. Also, a fail indication (see :FAIL?) for LIMIT 1 or LIMIT 2 will be cleared
when the respective limit test is disabled.
Programming example
10 OUTPUT 716; “:calc3:lim:stat on; stat?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Enables LIMIT 1 test, and then queries the state of LIMIT 1.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the state of LIMIT 1 (1; on).
:FAIL?
:CALCulate3:LIMit[1]:FAIL? Read LIMIT 1 test results
:CALCulate3:LIMit2:FAIL? Read LIMIT 2 test results
Formats
:calc3:lim:fail?
:calc3:lim2:fail?
Description
These commands are used to read the results of LIMIT 1 and LIMIT 2 tests. After sending one
of these commands and addressing the Model 2001 to talk, a value (0 or 1) will be sent to the
computer:
0 = Limit test passed
1 = Limit test failed
The response message (0 or 1) only tells you if a limit test has passed or failed. It does not tell
you which limit (upper or lower) has failed. To determine which limit has failed, you will have
to read the Measurement Event Register (see paragraph 4.6.6).
Reading the results of a limit test does not clear the fail indication of the test. A failure can be
cleared by using a :CLEar command, or by disabling the test (:STATe OFF).
Programming example
This example assumes that LIMIT 1 test has been performed.
10 OUTPUT 716; “:calc3:lim:fail?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Queries the result of LIMIT 1 test.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the result of LIMIT 1 test.
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