Tektronix Keithley 2651A Reference Manual page 892

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Command queue
The command queue holds commands that have been received from a remote interface that are
available for execution. This allows the Model 2651A to accept multiple commands and queue them
for execution.
When a command is received from a remote interface, the command available (CAV) bit in the
Operation Status Remote Summary Register is set. For additional detail, see
status.operation.remote.*
Output queue
Response messages, such as those generated from print commands, are placed in the output queue.
All remote command interfaces share the same output queue.
The output queue sets the message available (MAV) bit in the status model.
The data in the output queue is cleared by the *CLS command.
Error queue
The error queue holds error and status messages. As programming errors and status messages
occur, a message that defines the error or status is placed in the error queue.
An error or status message is cleared from the error queue when it is read. You can also clear the
error queue by sending the command errorqueue.clear(). An empty error queue clears the error
available (EAV) bit in the Status Byte Register.
Messages in the error queue include a code number, message text, severity, and TSP-Link
number. See
When you read a single message from the error queue, the oldest message is read. When empty, the
error number 0 and "No Error" is placed in the queue.
The commands used to control the error queue are listed in the following table.
Error queue commands
Error queue command
errorqueue.clear()
errorqueue.count
errorCode, message,
severity, errorNode =
errorqueue.next()
2651A-901-01 Rev. C October 2021
(on page Error! Bookmark not defined.).
Error summary list (on page 8-3) for a list of the messages.
Description
Clear error queue of all errors.
Number of messages in the error/event queue.
Request error code, text message, severity, and TSP-Link node
number.
Section 15: Status model
® node
15-3