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Status registers
Service request mask
register
Event register
Reading only *STB? common command.
In this case, the (MSS) 6 Bit is returned and remain in the status it was before reading [see §.
*STB (Status Byte)]
The *CLS common command is reset to zero.
Detailed description
MSB
6
7
RQS
5
4
ESB
MAV
6
MSS
RQS
Request Service (6 bit)
Indicates if the instrument requests a service. The type of COMM used on the
instrument does not generate a request, but the byte is accessible in reading. It is
reset to 0 after reading and can switch to zero only if the event register is reset to
zero (by reading or *CLS).
MSS
Master Summary Status (6 bit)
Indicates if the instrument has a reason to request a service. This information is
accessible only in reading the status register. (*STB? command) and stays as it is
after the reading.
ESB
Event Satus Bit (5 bit)
Indicates if at least one of the conditions of the event register is satisfied and not
masked.
MAV
Message Available (4 bit)
Indicates if at least one response is in the output spooler.
Reading and writing *SRE command.
MSB
7
6
5
4
ESB
MAV
Reading *ESR command. Its reading resets to zero.
Detailed description
MSB
7
6
5
PON
URQ
CME
PON
Power On (7 bit)
Not used
URQ
User request (6 bit)
Not used
CME
Command Error (5 bit)
A command error has been detected.
EXE
Execution Error (4 bit)
An error execution has been detected.
DDE
Device Dependant Error (3 bit)
An error specific to the instrument has been detected.
QYE
Query Error (2 bit)
A query error has been detected.
RQC
Request Control (1 bit)
Always at zero.
OPC
Operation Complete (0 bit)
All operations running are ended.
3
2
1
_
3
2
1
4
3
2
EXE
DDE
QYE
109
LSB
0
_
_
*STB ?
LSB
0
*SRE<NRF>*SRE?
LSB
1
0
RQC
OPC
*ESR?
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