Reading The Standard Event Enable Register; The Error Queue; Instrument Status Reporting - Scpi Elements; General - Fluke 6100A User Manual

6100A
Users Manual

5-40. Reading the Standard Event Enable Register

The common query: ESE? reads the binary number in the ESE register. The response is
a decimal number, which is the sum of the binary-weighted values in the register.

5-41. The Error Queue

As errors in the instrument are detected, they are placed in a 'first in, first out' queue,
called the 'Error Queue'. This queue conforms to the format described in the SCPI
Command Reference (Volume 2) Chapter 19, paragraph 19.7, although only errors are
detected. Three kinds of errors are reported in the error queue: command errors, execution
errors and device-specific errors.
The queue is read destructively, as described in the SCPI Command Reference, using the
query command 'SYSTem:ERRor?'. This command will return a code number and error
message. The query SYSTem:ERRor? can be used to read errors in the queue until it is
empty, (when the message '0, No Error' will be returned).
5-42. Instrument Status Reporting — SCPI Elements

5-43. General

In addition to IEEE 488.2 status reporting the instrument implements the Operation and
Questionable Status registers with associated 'Condition', 'Event' and 'Enable' commands.
The extra status deals with current operation of the instrument and the quality of
operations.
The structure of these two registers is detailed in the diagram at the beginning of 'IEEE-
488 and SCPI Standard defined Features section', together with the nature of the reported
events. Access to the registers is detailed in the STATus subsystem of the 'SCPI
Commands and Syntax' section of this document.

5-44. SCPI Status Registers

The SCPI states are divided into two groups, reporting from the Operation or
Questionable Status event register. Each Status register has its own 'Enable' register,
which can be used as a mask to enable bits in the event register itself, in a similar way to
that set by the ESE command for the Standard Event status Register (ESR).
Each Status Register is associated with its own third 'Condition' register, in which the bits
are not 'sticky', but are set and reset as the internal conditions change.
Each Enable Register can be commanded to set its mask to enable selected bits in the
corresponding Event Register. All registers (Event, Enable and Condition) can be
interrogated by appropriate 'Queries' to divulge their bits' states.

5-45. Reportable SCPI States

The 6100A does not normally use the Operation Status Event Register, but future
hardware options may make use of it (for example, the energy counter/timer option).
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