Models 2510 and 2510-AT User’s Manual Remote Operations 6-11
General bus commands
General commands are those commands, such as DCL, that have the same general mean-
ing regardless of the instrument. Table 6-3 lists the general bus commands, which are
described in detail in Appendix C.
REN (remote enable)
The remote enable command is sent to the Model 2510 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 Model 2510 in the local, talker, lis-
tener 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.
To send the IFC command, the controller need only set the IFC line true for a minimum of
100µs.
LLO (local lockout)
Use the LLO command to prevent local operation of the instrument. After the unit receives
LLO, all of its front panel controls except OUTPUT OFF are inoperative. In this state,
pressing LOCAL will not restore control to the front panel. The GTL command restores
control to the front panel. Cycling power will also cancel local lockout.
Table 6-3
General bus commands
Command Effect on Model 2510
REN Goes into remote when next addressed to listen.
IFC Goes into talker and listener idle states.
LLO LOCAL key locked out.
GTL Cancel remote; restore Model 2510 front panel operation.
DCL Returns all devices to known conditions.
SDC Returns Model 2510 to known conditions.
GET Initiates a trigger.
SPE, SPD Serial polls the Model 2510.
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