2400 Series SourceMeter
®
User’s Manual Remote Operations 14-7
General bus commands
General commands are those commands, such as DCL, that have the same general mean-
ing regardless of the instrument. Table 14-1 lists the general bus commands.
REN (remote enable)
The remote enable command is sent to the SourceMeter by the controller to set up the
instrument for remote operation. Generally, the instrument should be placed in the remote
mode before you attempt to program it over the bus. Setting REN true does not place the
instrument in the remote state. You must address the instrument to listen after setting REN
true before it goes into remote.
The SourceMeter must be in remote in order to use the following commands to trigger and
acquire readings:
• :INITiate and then :FETCh?
• :READ?
• :MEASure?
IFC (interface clear)
The IFC command is sent by the controller to place the SourceMeter in the local, talker,
listener idle states. The unit responds to the IFC command by cancelling front panel TALK
or LSTN lights if the instrument was previously placed in one of these states.
Note that this command does not affect the status of the instrument. Settings, data, and
event registers are not changed.
Table 14-1
General bus commands
Command Effect on SourceMeter
REN
IFC
LLO
GTL
DCL
SDC
GET
SPE, SPD
Goes into remote when next addressed to listen.
Goes into talker and listener idle states.
LOCAL key locked out.
Cancel remote; restore SourceMeter front panel operation.
Returns all devices to known conditions.
Returns SourceMeter to known conditions.
Initiates a trigger.
Serial polls the SourceMeter.
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