Keithley S46 Instruction Manual page 53

3-18 Operation
Messages in the error queue are stored in a FIFO (First In-First Out) manner. The
commands to read the error queue are listed in
in the error queue, the "oldest" message is read and then removed from the queue. If the
queue becomes full, the message "350, 'Queue Overflow'" will occupy the last memory
location. On power-up, the error queue is empty. When empty, the message "0, No Error"
is placed in the queue.
Messages in the error queue are preceded by a code number. Negative (-) numbers are
used for SCPI defined messages, and positive (+) numbers are used for Keithley
Instruments defined messages. The error messages are listed in
On power-up, all error messages are enabled and will go into the error queue as they
occur. Status messages are not enabled and will not go into the queue. As listed in
3-6, there are commands to enable and/or disable messages. For these commands, the
<list> parameter is used to specify which messages to enable or disable. The messages are
specified by their codes. The following examples show various forms for using the <list>
parameter.
<list>
When you enable messages, messages not specified in the list are disabled. When you
disable messages, each listed message is removed from the enabled list.
NOTE
Table 3-6
SCPI commands — error queue
Command
STATus
:QUEue
SYSTem
:ERRor?
:CLEar
Notes:
1. Power-up and *CLS empties the error queue. STATus:PRESet has no effect.
2. Power-up enables error messages and disables status messages. *CLS and STATus:PRESet have no effect.
S46-901-01 Rev. C / January 2006
= (-110)
= (-110,-222,-220) Comma separated entries
To prevent all messages from entering the error queue, send the enable
command along with the null list parameter as follows:
STATus:QUEue:ENABle ().
Description
STATus subsystem:
Read error queue:
[:NEXT]? Read and clear oldest error/status message.
:ENABle<list> Specify error and status messages for error queue.
:ENABle? Read the enabled messages.
:DISable<list> Specify messages not to be placed in queue.
:DISable? Read the disabled messages.
:CLEar Clear messages from error queue.
SYSTem subsystem:
Read error queue:
Clear messages from error queue.
S46/S46T Microwave Switch System Instruction Manual
Table 3-6. When you read a single message
Single message
Table 3-9.
Table
Default
(Note 1)
(Note 2)
(Note 2)
(Note 1)