Rohde & Schwarz SMBV100A - Error Queue

Remote Control Basics
R&S
®
SMBV100A
431Operating Manual 1407.6062.32 ─ 08
6.5.5.5 Error Queue
Each error state in the instrument leads to an entry in the error queue. The entries of the
error queue are detailed plain text error messages that can be looked up in the Error Log
or queried via remote control using SYSTem:ERRor[:NEXT]? or
SYSTem:ERRor:ALL?. Each call of SYSTem:ERRor[:NEXT]? provides one entry from
the error queue. If no error messages are stored there any more, the instrument responds
with 0, "No error".
The error queue should be queried after every SRQ in the controller program as the
entries describe the cause of an error more precisely than the status registers. Especially
in the test phase of a controller program the error queue should be queried regularly since
faulty commands from the controller to the instrument are recorded there as well.
6.5.6 Reset Values of the Status Reporting System
The following table contains the different commands and events causing the status
reporting system to be reset. None of the commands, except *RST and
SYSTem:PRESet, influence the functional instrument settings. In particular, DCL does
not change the instrument settings.
Table 6-5: Resetting the status reporting system
Event Switching on supply
voltage
Power-On-Status-
Clear
DCL, SDC
(Device
Clear,
Selected
Device
Clear)
*RST or
SYS-
Tem:PRE-
Set
STA-
Tus:PRE-
Set
*CLS
Effect 0 1
Clear STB, ESR - yes - - - yes
Clear SRE, ESE - yes - - - -
Clear PPE - yes - - - -
Clear error queue yes yes - - - yes
Clear output buffer yes yes yes 1) 1) 1)
Clear command processing and
input buffer
yes yes yes - - -
1) The first command in a command line that immediately follows a <PROGRAM MESSAGE TERMINATOR>
clears the output buffer.
6.6 General Programming Recommendations
Initial instrument status before changing settings
Manual operation is designed for maximum possible operating convenience. In contrast,
the priority of remote control is the "predictability" of the instrument status. Thus, when a
command attempts to define incompatible settings, the command is ignored and the
General Programming Recommendations