4 Remote Interface Reference
182 Keysight 34420A User’s Guide
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.
Bit Definitions — Standard Event Register
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 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.
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