2
Remote Control
2.1 Remote control basis
20
Table 2.7 Description of Event Status Bytes
Data Bit
Meaning
0
Operation completed
This bit is set when the preceding command has been executed and the command *OPC
has been received.
1
Not used.
2
Query error
This bit is set if the controller reads the instrument data without sending a query command or
sends a new command without reading the query data. It means that a wrong query is
generated and the query can‟t be executed.
3
Instrument error
This bit is set if an instrument error has occurred. Error code range: -300 to -399, or a
positive error code. You can query related information in the error queue for specific error
message.
4
Execution error
This bit is set if a syntactically correct command is received but cannot be executed. At the
same time, an error with an error code within the range from -200 to -300 is generated in the
error queue.
5
Command error
This bit is set if the received command syntax is incorrect. Error code range: -100 to -200.
You can query related information in the error queue for specific error message.
6
User request
This bit is set if the instrument is switched to the manual control mode.
7
Power on
This bit is set when the instrument is powered on.
2.1.6 Error Queue
Each error status of the instrument corresponds to an entry in the error queue, containing the specific
error message text, which can be viewed through the error log, or queried by the process control
command: SYSTem:ERRor[:NEXT]? or SYSTem:ERRor:ALL?. If there is no error in the error queue, the
query returns 0, “no error”.
As the obtained error cause description is more accurate than the status register, the error queue shall
be queried in the controller service request handler. The error queue shall be frequently queried
especially during the controller program test stage, so as to clarify the error command record sent to the
instrument by the controller.
2.1.6.1 Reset status reporting system
The following list shows the commands and events for resetting the status report system. Except for the
commands *RST and SYSTem:PRESet, other commands do not change the instrument function settings.
Similarly, the DCL does not change the instrument setup status. The specific description is as shown in
the following table:
