User manual

2400 Series SourceMeter
®
User’s Manual Status Structure 15-11
Status register sets
As shown in Figure 15-1, there are four status register sets in the status structure
of the SourceMeter; Standard Event Status, Operation Event Status, Measure-
ment 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 15-4) are described as
follows:
• Bit B0, Operation Complete — Set bit indicates that all pending selected
device operations are completed and the SourceMeter is ready to accept
new commands. This bit only sets in response to the *OPC? query com
-
mand. See Section 16 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 instru-
ment operation did not execute properly due to some internal condition.
• Bit B4, Execution Error (EXE) — Set bit indicates that the SourceMeter
detected an error while trying to execute a command.
• Bit B5, Command Error (CME) — Set bit indicates that a command error
has occurred.
• Command errors include:
• IEEE-488.2 syntax error — SourceMeter received a message that does
not follow the defined syntax of the IEEE-488.2 standard.
• Semantic error — SourceMeter received a command that was mis-
spelled or received an optional IEEE-488.2 command that is not imple-
mented.
• The instrument received a Group Execute Trigger (GET) inside a pro-
gram message.
• Bit B6, User Request (URQ) — Set bit indicates that the LOCAL key on the
SourceMeter front panel was pressed.
• Bit B7, Power ON (PON) — Set bit indicates that the SourceMeter has
been turned off and turned back on since the last time this register has
been read.