Read? Command - Keithley 2010 User Manual

5-4 SCPI Command Reference

READ? command

:READ?
Description
This command is typically used with the instrument in the "one-shot"
measurement mode to trigger and acquire a specified number of readings.
The :SAMPle:COUNt command is used to specify the number of readings
(see Trigger Subsystem). Note that the readings are stored in the buffer.
When this command is sent, the following commands execute in the order
they are presented:
:ABORt
:INITiate
:FETCh?
When :ABORt is executed, the instrument goes into the idle state if
continuous initiation is disabled. If continuous initiation is enabled, the
operation re-starts at the beginning of the Trigger Model.
If the instrument is in the idle state, :INITiate takes the instrument out of the
idle state. If continuous initiation is enabled, (:INITiate:CONTinuous ON),
then the :INITiate command generates an error and ignores the command.
See the :FETCh? command for more details. Note that an "Init ignored" error
will not cancel the execution of the :FETCh? command.
NOTE You cannot use the :READ? command if sample count >1 (see
Trigger Subsystem) and there are readings stored in the buffer
(error -225, out of memory). Either set sample count to one or
clear the buffer.
See Appendix C for an example program using the READ?
command.