Status Structure 14-11
Status register sets
As shown in Figure 14-1, there are four status register sets in the status structure of the
SourceMeter: Standard Event Status, Operation Event Status, Measurement Event Status, and
Questionable Event Status.
NOTE See Appendix B for details on which register bits are set by specific error and status
conditions.
Register bit descriptions
Standard Event Register
The used bits of the Standard Event Register (shown in Figure 14-4) are described as
follows:
• Bit B0, Operation Complete — Set bit indicates that all pending selected device oper-
ations are completed and the SourceMeter is ready to accept new commands. This bit
only sets in response to the *OPC? query command. See Section 15 for details on
*OPC and *OPC?.
• Bit B1 — Not used.
• Bit B2, Query Error (QYE) — Set bit indicates that you attempted to read data from
an empty Output Queue.
• Bit B3, Device-Dependent Error (DDE) — Set bit indicates that an instrument opera-
tion did not execute properly due to some internal condition.
DDE
(B3)
QYE
(B2)
—
(B1)
OPC
(B0)
EXE
(B4)
CME
(B5)
URQ
(B6)
PON
(B7)
—
(B15 - B8)
Standard Event Status
Enable Register
&
&
&
&
&
&
OR
To Event
Summary Bit
(ESB) of Status
Byte Register
(Figure 14-3)
PON = Power On
URQ = User Request
CME = Command Error
EXE = Execution Error
*ESE
*ESE?
&
DDE
(B3)
QYE
(B2)
—
(B1)
OPC
(B0)
EXE
(B4)
CME
(B5)
URQ
(B6)
PON
(B7)
—
(B15 - B8)
Standard Event
Status Register
*ESR?
DDE = Device-Dependent Error
QYE = Query Error
OPC = Operation Complete
& = Logical AND
OR = Logical OR
gure
-
Standard event
status
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