Keithley 2016 - Figure 4-14 Standard Event Status Register

A set bit in this register indicates that a particular event has occurred. For example, for an
acquired decimal value of 48, the binary equivalent is 00110000. From this binary value, bits B4
and B5 of the Standard Event Status Register are set. These bits indicate that a device-dependent
error and command error have occurred.
The bits of the Standard Event Status Register are described as follows:
• Bit B0, Operation Complete — A set bit indicates that all pending selected device
operations are completed and the Model 2016 is ready to accept new commands. This
bit only sets in response to the *OPC? query command.
• Bit B1 — Not used
• Bit B2, Query Error (QYE) — A set bit indicates that you attempted to read data from
an empty Output Queue.
• Bit B3, Device-dependent Error (DDE) — A set bit indicates that an instrument
operation did not execute properly due to some internal condition.
• Bit B4, Execution Error (EXE) — A set bit indicates that the Model 2016 detected an
error while trying to execute a command.
• Bit B5, Command Error (CME) — A set bit indicates that a command error has occurred.
Command errors include:
• IEEE-488.2 syntax error: Model 2016 received a message that does not follow the
defined syntax of the IEEE-488.2 standard.
• Semantic error: Model 2016 received a command that was misspelled, or received
an optional IEEE-488.2 command that is not implemented.
• The instrument received a Group Execute Trigger (GET) inside a program message.
• Bit B6, User Request (URQ) — A set bit indicates that the LOCAL key on the
Model 2016 front panel was pressed.
• Bit B7, Power ON (PON) — A set bit indicates that the Model 2016 has been turned off
and turned back on since the last time this register has been read.
Fi
gure
4
-
14
Standard event
status register
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
Note : Bits B8 through B15 are not shown since they are not used.
Remote Operation 4-37