IEEE-488 Reference
4-39
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 operation did
not execute properly due to some internal condition.
Bit B4, Execution Error (EXE)
Set bit indicates that the Model 2001 detected an error while
trying to execute a command.
Bit B5, Command Error (CME)
Set bit indicates that a command error has occurred. Com-
mand errors include:
1. IEEE-488.2 syntax error: Model 2001 received a message that does not follow the defined
syntax of the IEEE-488.2 standard.
2. Semantic error: Model 2001 received a command that was misspelled, or received an op-
tional IEEE-488.2 command that is not implemented.
3. The instrument received a Group Execute Trigger (GET) inside a program message.
Bit B6, User Request (URQ)
Set bit indicates that the LOCAL key on the Model 2001 front
panel was pressed.
Bit B7, Power On (PON)
Set bit indicates that the Model 2001 has been turned off and
turned back on since the last time this register has been read.
Programming Example
10 OUTPUT 716; “*ESE?” ! Request register value
20 ENTER 716; A$ ! Address Model 2001 to talk
30 PRINT A$ ! Display value
B7 B6 B5 B4 B3 B2 B1 B0
0/1 0/1 0/1
Bit Position
Event
Decimal Weighting
Value
Value : 1 = Event Bit Set
0 = Event Bit Cleared
Events : PON = Power On
URQ = User Request
CME = Command Error
EXE = Execution Error
DDE = Device-dependent Error
QYE = Query Error
OPC = Operation Complete
PON URQ CME EXE DDE QYE OPC
0/1 0/1 0/1 0/1
(2 )
7
(2 )
6
(2 )
5
(2 )
4
(2 )
3
(2 )
2
(2 )
0
64 32 1128 16 8 4
igure 4-16
Standard Event Status Register
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