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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 meter’s error queue, with the following
exception:
A reading overload condition is always reported in both the standard
event register (bit 3) and the questionable data event register (bits 0 or
9). However, no error message is recorded in the meter’s error queue.
Read the error queue using SYSTem:ERRor?.
Bit Definitions — Standard Event Register
Bit Decimal Value Definition
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 meter tried to read the output buffer but it
was empty. Or, a new command line was
received before a previous query had been
read. Or, both the input and output buffers
are full.
3 Device Error 8 A self-test, calibration, or reading overload
error occurred.
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.
4
Chapter 4 Remote Interface Reference
The SCPI Status Model
165