Standard Event Status (Esr); Standard Event Status Enable (Ese); Communication Error Status (Cesr) - Stanford Research Systems SIM984 Operation And Service Manual

2.5 Status Model

2.5.3 Standard Event Status (ESR)

2.5.4 Standard Event Status Enable (ESE)

2.5.5 Communication Error Status (CESR)

SIM984 Isolation Amplifier
The Standard Event Status register consists of 8 event flags. These
event flags are all "sticky bits" that are set by the corresponding event,
and cleared only by reading or with the *CLS command. Reading a
single bit (with the *ESR? i query) clears only bit i.
Weight Bit Flag
1 0 OPC
2 1 INP
4 2 QYE
8 3 DDE
16 4 EXE
32 5 CME
64 6 URQ
128 7 PON
OPC : Operation Complete. Set by the *OPC command.
INP : Input Buffer Error. Indicates data has been discarded from the
Input Buffer.
QYE : Query Error. Indicates data in the Output Queue has been lost.
DDE : Device Dependent Error. This bit is undefined in the SIM984.
EXE : Execution Error. Indicates an error in a command that was
successfully parsed. Out-of-range parameters are an example.
The error code can be queried with LEXE?.
CME : Command Error. Indicates a parser-detected error. The error
code can be queried with LCME?.
URQ : User Request. Indicates a front-panel button was pressed.
PON : Power On. Indicates that an off-to-on transition has occurred
The ESE acts as a bitwise AND with the ESR register to produce the
single bit ESB message in the Status Byte Register (SB). It can be set
and queried with the *ESE(?) command.
This register is cleared at power-on.
The Communication Error Status register consists of 8 event flags;
each of which is set by the corresponding event, and cleared only by
reading or with the *CLS command. Reading a single bit (with the
CESR? i query) clears only bit i.
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