Rohde & Schwarz 1094.0006.50, Operating Manual

Page: 182 / 374

Remote Control CTS55
1094.0006.55 11.22 E-5
11.8.4 Error-Queue Query
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 which can be queried via the remote control using command
"SYSTem:ERRor?". Each call of "SYSTem:ERRor?" provides an 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.
11.8.5 Resetting Values of the Status Reporting System
Table 11-5 comprises the different commands and events causing the status reporting system to be
reset. None of the commands, except for *RST and SYSTem:PRESet influences the functional
instrument settings. In particular, DCL does not change the instrument settings.
Table 11-5 Resettting instrument functions
Event Switching on supply
voltage
Power-On-Status-
Clear
*RST or
SYSTem:PRESet
STATus:PRESet *CLS
Effect 0 1
Clear STB,ESR

yes
 
yes
Clear ESE

yes
  
Clear EVENTt parts of the
registers

yes
 
yes
Clear error queue yes yes
 
yes
Clear output buffer yes yes 1) 1) 1)
Clear command
processing and input
buffer yes yes
 
yes
1) Every command being the first in a command line, i.e., immediately following a <PROGRAM MESSAGE TERMINATOR>
clears the output buffer.