Keithley 6485 Instruction Manual page 157

Model 6485 Picoammeter Instruction Manual
The error queue holds up to 10 error/status messages. The commands to read the error
queue are listed in
"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 defined
messages. The messages are listed in
mands to read the entire message (code and message) or the code only.
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
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 speci-
fied by their codes. The following examples show various forms for using the <list>
parameter.
<list> = (-110)
When you enable messages, messages not specified in the list are disabled. When you dis-
able messages, each listed message is removed from the enabled list.
To prevent all messages from entering the error queue, send the enable command along
with the null list parameter as follows: STATus:QUEue:ENABle ().
Table 10-7. When you read a single message in the error queue, the
= (-110:-222)
= (-110:-222, -220)
Appendix B. As shown in
Single message
Range of messages (-110 through -222)
Range entry and single entry (separated by a
comma)
Status Structure 10-19
Table 10-7, there are com-
Table 10-7,