Agilent Technologies 34401A manual Bit Definitions Standard Event Register

Chapter 4 Remote Interface Reference

The SCPI Status Model

The Standard Event Register

The standard event register reports the following types of instrument events: power-on detected, command syntax errors, command execution errors, self-test or calibration errors, query errors, or when an *OPC command is executed. Any or all of these conditions can be reported in the standard event summary bit through the enable register. You must write a decimal value using the *ESE (event status enable) command to set the enable register mask.

An error condition (standard event register bits 2, 3, 4, or 5) will always record one or more errors in the multimeter’s error queue, except for the following case. Read the error queue using SYSTem:ERRor?.

A reading overload condition is always reported in both the standard event register (bit 3) and the questionable data event register (bits 0, 1, or 9). However, no error message is recorded in the multimeter’s error queue.

Bit Definitions – Standard Event Register

	Bit	Decimal	Definition
		Value
0	Operation Complete	1	All commands prior to and including an *OPC
			command have been executed.
1	Not Used	2	Always set to 0.
2	Query Error	4	The multimeter tried to read the output buffer but
			it was empty. Or, a new command line was
			received before a previous query has been read.
			Or, both the input and output buffers are full.
3	Device Error	8	A self-test, calibration, or reading overload error
			occurred (see error numbers 501 through 748 in
			chapter 5).
4	Execution Error	16	An execution error occurred (see error numbers
			-211 through -230 in chapter 5).
5	Command Error	32	A command syntax error occurred (see error
			numbers -101 through -158 in chapter 5).
6	Not Used	64	Always set to 0.
7	Power On	128	Power has been turned off and on since the last
			time the event register was read or cleared.

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