Instruction manual

Chapter 5 Errors
Introduction
5-2 Programming Guide
5
Introduction
This chapter explains how to read error messages from the Counter,
discusses the types of errors, and provides a table of all of the Counter’s
error messages and their probable causes.
Reading an Error
Executing the :SYSTem:ERRor? command reads the oldest error from the
error queue and erases that error from the queue. The :SYST:ERR?
response has the form:
<error number>, <error string>
An example response is:
-113,”Undefined header”
All errors set a corresponding bit in the Standard Event Status Register
(see the section titled “Standard Event Status Register Group” on Page 3-30).
The following short program reads all errors (one at a time, oldest to
newest) from the error queue. As each error is read, it is automatically
erased from the error queue. When the error queue becomes empty
(that is, when all errors have been read from the queue), further queries
return the
+0, ”No error” response.
10 ASSIGN @Cntr TO 703
20 !Assign path name
30 DIM Err_string$[255]
40 !Creates array for error string
50 REPEAT
60 !Repeats until error queue is empty
70 OUTPUT @Cntr;"SYST:ERR?"
80 !Read error number and string
90 ENTER @Cntr;Err_num,Err_string$
100 !Enter error number and string
110 PRINT Err_num,Err_string$
120 !Print error number and string
130 UNTIL Err_num = 0
140 END