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15-6
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2600AS-901-01 Rev. B / September 2008
Section 15: Communications Interfaces
Series 2600A System SourceMeter® Instruments Reference Manual
REN (remote enable)
The remote enable command is sent to the Series 2600A 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.
IFC (interface clear)
The IFC command is sent by the controller to place the Series 2600A in the local, talker, or 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.
Transfer of command messages to the instrument and transfer of response messages from the
instrument are not interrupted by IFC. If a response message was suspended by IFC, transfer of
the message will resume when the unit is addressed to talk. If a command message transfer was
suspended by IFC, the rest of the message can be sent when the unit is addressed to listen.
LLO (local lockout)
When the unit is in remote operation, all front panel controls are disabled except the
LOCAL
and
OUTPUT OFF
keys (and of course the POWER switch). The LLO command disables the
LOCAL
key, but it does not affect
OUTPUT OFF
, which cannot be disabled.
GTL (go to local)
Use the GTL command to put a remote-mode instrument into local mode. Leaving the remote state
also restores operation of all front panel controls.
DCL (device clear)
Use the DCL command to clear the GPIB interface and return it to a known state. Note that the
DCL command is not an addressed command, so all instruments equipped to implement DCL will
do so simultaneously.
When the Series 2600A receives a DCL command, it clears the Input Buffer and Output Queue,
cancels deferred commands, and clears any command that prevents the processing of any other
device command. A DCL does not affect instrument settings and stored data.
SDC (selective device clear)
The SDC command is an addressed command that performs essentially the same function as the
DCL command. However, since each device must be individually addressed, the SDC command
provides a method to clear only selected instruments instead of clearing all instruments
simultaneously, as is the case with DCL.
GET (group execute trigger)
GET is a GPIB trigger that is used to trigger the instrument to take readings from a remote
interface.