User manual

Section 12: Status Model Series 3700 System Switch/Multimeter Reference Manual

12-26 3700S-901-01 Rev. C / July 2008

Error queue

The error queue holds error and status messages. When an error or status

event occurs, a message that defines the error or status is placed in the error

queue and the error available (EAV) bit in the status byte register is set. An error

or status message is cleared from the error queue when it is read. The error

queue is considered cleared when it is empty. An empty error queue clears the

EAV bit in the status byte register.

The commands to control the error queue are listed in the following table. When

you read a single message in the error queue, the oldest message is read and

then removed from the queue. On power-up, the error queue is initially empty. If

there are problems detected during power-on, entries will be placed in the

queue. When empty, the error number 0 and "No Error" are placed in the queue.

Messages in the error queue include a code number, message text, severity,

and TSP-Link

node number.

Error queue command

Description

errorqueue.clear()

Clear error queue of all errors.

errorqueue.count

Number of messages in the error/event

queue.

errorcode, message, severity,

node = errorqueue.next()

Request error code, text message,

severity, and TSP-Link node number.