HP 132A, 53131A HP-IB, Introduction, +0, “No error”, -113,“Undefined header”, <error number>, <error string

Chapter 5 Errors

Introduction

Introduction

This chapter explains how to read any errors from the Counter, discusses the types of errors, and provides a table of all of the Counter ’s errors and their probable causes.

Displaying Errors

When an HP-IB error is detected, the HP-IB XXX message will appear on the front-panel display, where XXX indicates the error number found in Table 5-2.

The front-panel error messages are most easily seen if the Counter is in Single (:INIT:CONT OFF) or in the menu display mode.

(When the Counter is configured to display measurement results, the measurements will overwrite the HP-IB error messages.)

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”

Positive error numbers are specific to the Counter. Negative error numbers are command language related and are discussed later in this chapter.

All errors set a corresponding bit in the Standard Event Status Register (see the section titled “Standard Event Status Register Group” on page 3-2 4 of Chapter 3).

The following short program reads all errors (one at a time, oldest to newest) from the error queue. After each error is read, it is automatically erased from the error queue. When the error queue is empty (that is, all errors have been read from the queue),

further queries return the +0, “No error” response.

5-2 Programming Guide