Specifications

202 Chapter 11

Error Handling

Using the Error Queue

The error queue contains the error numbers and messages of any errors that have occurred,

which could provide very useful information depending on the circumstances. Use the

following GPIB command to read the error queue.

• SYST:ERR? on page 517

Also, the following GPIB command can be used to obtain the number of errors in the

queue.

• SYST:ERR:COUN? on page 518

The error queue can be used in the following ways.

1. Based on the information from the error queue, you can decide how to branch a

program. By reading the error queue, you can easily determine whether an error has

occurred; if no error has occurred, an error number of 0 and an error message of “No

error” are returned. The error queue can also be used to set a program to perform error

handling only when a certain type of error occurs.

2. If an error is detected using SRQ, the error queue can be used to investigate the type of

error. For how to use SRQ, refer to

Example 11-1.