Keithley 7001, Instruction Manual

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IEEE-488 Reference
5-26
5.8 General bus commands
General bus commands are those commands such as DCL
that have the same general meaning regardless of the instru-
ment. Commands supported by the Model 7001 are listed in
Table 5-3 which also lists BASIC statements necessary to
send each command. Note that commands requiring that a
primary address be specified assume that the primary address
is set to 7. This is the address that is set at the factory.
5.8.1 REN (remote enable)
The remote enable command is sent to the Model 7001 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. Simply
setting REN true does not actually place the instrument in the
remote state. Instead the instrument must be addressed to lis-
ten after setting REN true before it goes into remote.
Note that the instrument need not be in remote to be a talker.
Programming Example

This sequence is automatically
performed by the controller when the following is typed into
the keyboard.
REMOTE 707
After the RETURN key is pressed, the instrument is in the
remote state, as indicated by the REM annunciator. If not,
check to see that the instrument is set to the proper primary
address 07, and check to see that the bus connections are
properly made.
Note that all front panel controls except for LOCAL (and, of
course, POWER) are inoperative while the instrument is in
remote. You can restore normal front panel operation by
pressing the LOCAL key.
Table 5-3
General bus commands and associated BASIC statements
Command
HP BASIC 4.0
statement
Effect on Model 7001
REN REMOTE 7 Goes into effect when next addressed to listen.
IFC ABORT 7 Goes into talker and listener idle states.
LLO LOCAL LOCKOUT 7 LOCAL key locked out.
GTL LOCAL 707 Cancel remote, restore front panel operation.
DCL CLEAR 7 Returns 7001 to known conditions.
SDC CLEAR 707 Returns all devices to known conditions.
GET TRIGGER 707 Initiates a trigger.
SPE, SPD SPOLL (707) Serial Polls the Model 7001.
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