2260B Series Programming Manual  
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or query errors; see the other error definitions 
in this section. 
Error Code  Description 
-310 System error 
Indicates that some error, termed “system 
error” by the device, has occurred. This code is 
device-dependent. 
-320 Storage fault 
Indicates that the firmware detected a fault 
when using data storage. This error is not an 
indication of physical damage or failure of any 
mass storage element. 
Query Errors  
 
Overview 
An <error/event number> in the range [ -499 , -
400 ] indicates that the output queue control of 
the instrument has detected a problem with the 
message exchange protocol described in IEEE 
488.2, chapter 6. The occurrence of any error in 
this class shall cause the query error bit (bit 2) 
in the event status register (IEEE 488.2, section 
11.5.1) to be set. These errors correspond to 
message exchange protocol errors described in 
IEEE 488.2, section 6.5. One of the following is 
true: 
•  An attempt is being made to read data from the 
output queue when no output is either present 
or pending; 
•  Data in the output queue has been lost. 
Events that generate query errors shall not 
generate command errors, execution errors, or 
device-specific errors; see the other error 
definitions in this section.