Keithley 194 Instruction Manual page 101

IEEE-488 PROGRAMMING
Table 4-6. General Bus Commands and Associated BASIC Statements
COllUll~llC
REN -
IFC
LLO
GTL
DCL
SDC
GET
Effect On Model 194
Goes into effect wzhen next addressed.
Goes into talker and listener idle st&cs.
LOCAL locked out.
Cancel remote, restore front panel
operation.
Returns to default conditions.
Returns to default conditions.
Triggers measurement in '3 and I3
modes.
4.8.1 REN (Remote Enable)
REN is a uniline command that must be asserted by the
controller to place the Model 194 in the remote mode.
Simply setting REN true will not actually place the instru-
ment in remote; instead, the unit must be addressed to
listen after REN is set true.
Generally, remote enable should be asserted before at-
tempting to program the instrument over the bus. Once
the instrument is in remote, all front panel controls except
LQCAL will be inoperative. Normal front panel operation
can be restored by pressing the LOCAL key.
To place the Model 194 in the remote mode, the controller
must perform the following sequence:
1. Set the REN line true.
2. Address the Model 194 to listen.
HP-85 Programming Example-Place the Model 194 in
remote with the following statement:
REMCITE ;OB
When the END LINE key is pressed, the Model IY4 should
be in the remote mode as indicated by the REMOl'l: a-
nunciator light. If not, check to see that proper bus co"-
nections we made, and that the instrument is programmed
for the correct primary address (9).
Note that all front panel controls except LOCAL (and, of
course, POWER) are inoperative while the instrumc"t is
in remote. You can restore normal front panel operatic"
by pressing the LOCAL button.
Note that the instrument goes into the remote mode whe"
the return key is pressed the second time. Front panel con-
trols (except LOCAL) will be inoperative. The instrument
can be returned to the local mode by pressing the LOCAL
key.
4-11