Instruction manual

Chapter 5 Errors
Error Types
5-10 Programming Guide
5
Table 5-2. Errors (Continued)
Number Error String Cause
-420
-430
-440
Query UNTERMINATED
Query DEADLOCKED
Query UNTERMINATED after
indefinite response
Indicates that a condition causing an UNTERMINATED Query error
occurred. For example, the Counter was addressed to talk and an
incomplete program message was received.
Indicates that a condition causing a DEADLOCKED Query error
occurred. For example, both input buffer and output buffer are full and
the Counter cannot continue.
Indicates that a query was received in the same program message after
a query requesting an indefinite response (for example, *IDN? or
*OPT?) was executed.