REMOTE CONTROL 
199 
Errors 
 
Error Message 
•Errors are stored in a first in-first out (FIFO) order.  The first error 
message that is returned is the first error message that was stored. 
When an error is read it is also cleared from the queue. 
•If there are more than 10 errors produced the last error in the queue is 
replaced with “Que overflow”.  Unless the error queue is cleared, no 
more errors can be written to the error queue. If there are no errors in 
the error queue, the instrument will return “No error”. 
•To clear the error queue, you can use the :SYSTem:CLEar command 
or cycle the power. When you read a message from the error queue 
that message will be cleared from the error queue. Using the *RST 
command to reset the instrument does not clear the error queue. 
•Remote control instructions can be used to clear the error queue. See 
the instructions listed in the previous chapter for details. 
Command Errors 
-440      Query unterminated after indefinite          
-430      Response                                        
-420      Query deadlocked                                
-410      Query unterminated                              
-363      Query interrupted                          
-350      Input buffer overrun                   
-330      Queue overflow               
-314      Self-test failed                  
-315      Save/recall memory lost                 
-260      Configuration memory lost             
-241      Expression error                                
-230      Hardware missing