B&K Precision MDL Series - Programming Manual - Manual (Page 28)

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Subsystem Commands
Subsystem commands are specific to functions. They can be a single command or a group of
commands. The groups are comprised of commands that extend one or more levels below the root.
The subsystem command groups are arranged according to function: Calibration, Channel, Input, List,
Measurement, Port, Status, System, Transient, and Trigger. Commands under each function are
grouped alphabetically under the subsystem. Commands followed by a question mark (?) take only the
query form. When commands take both the command and query form, this is noted in the syntax
descriptions.
3.2 Common Commands
Common commands begin with an * and consist of three letters (command) IEEE 488.2 standard to
perform some common interface functions. The electronic loads respond to the required common
commands that control status reporting, synchronization, and internal operations. The electronic loads
also respond to optional common commands that control triggers, power-on conditions, and stored
operating parameters.
Common commands and queries are listed alphabetically. If a command has a corresponding query
that simply returns the data or status specified by the command, then both command and query are
included under the explanation for the command. If a query does not have a corresponding command
or is functionally different from the command, then the query is listed separately. The description for
each common command or query specifies any status registers affected. Refer to Section 1.4
Programming the Status Registers, which explains how to read specific register bits and use the
information that they return.
Common Command Table
Mnemonic Name Description
*CLS Clear status Clears all event registers and Error Queue.
*ESE Event enable command Program the Standard Event Enable Register.
*ESE? Event enable query Read the Standard Event Enable Register.
*ESR? Event status query Read the Standard Event Status Register and clear it.
*OPC
Operation complete
command
Set the Operation Complete bit in the Standard Event Status
Register after all pending commands have been executed.