Iddc Error; No Remote Error; Scanning Program - Keithley 705 Instruction Manual

1 lddC
I J
a. Illegal Device Dependent Command (IDDC)
1 1
1
IddCcI 1
1 I
b. Illegal Device Dependent Command Option (IDDCO)
p7-l
c. No Remote
Figure 3-9. IEEE Display Error Message
3.9.1 IDDC Error
An IDDC error results when the Model 705 receives an invalid
command such as $X. This command is invalid because no such
letter exists in the instrument's programming language.
Programming Example-To
demonstrate an IDDC error, enter
the following statements into the HP-85 keyboard:
REMOTE 717 (END LINE)
OUTPUT 717; "$X" (END LINE)
When END LINE is pressed the second time, the error message
in Figure 3-Qa is displayed for about one second.
3.9.2 No Remote Error
A front panel no remote error message will be displayed if the
Model 705 is not in the remote mode when it receives a com-
mand over the bus. If an attempt is made to program the instru-
ment when it is not in the remote mode, the no remote message
in Figure 3-9~ will be displayed on the front panel for about one
second,
Programming Example
-To make sure the instrument is not in
the remote mode, enter the following statement into the HP-85:
LOCAL 7 (END LINE)
Now enter the following programming statement into the key-
board:
OUTPUT 717; "Dl X" (END LINE)
When this statement is executed, the no remote error message
in Figure 3-9c is displayed on the front panel of the instrument for
about one second.
3.10 SCANNING PROGRAM
The following program sets the Model 705 for the following
parameters.
1. Sets programmed first channel to 1.
2. Sets programmed last channel to 20.
3. Sets interval time to one second.
4. Sets the unit to the display mode.
5. Use the continuous scan mode.
6. Trigger the scan sequence on "X".
7. Provide a pause and clear statement.
Enter the following statements into the HP-85 to program the
Model 705 to scan chgnels 1 through 20 at a one second inter-
val rate.
PROGRAM COMMENTS
IO
20
30
35
40
50
60
70
80
REMOTE 717 (END
LINE)
CLEAR 7 (END LINE)
OUTPUT 717;
"DOFl L2OWl P2T4X"
(END LINE)
PAUSE (END LINE)
ENTER 717; A$ (END
LINE)
DISP A$ (END LINE)
PAUSE (END LINE)
CLEAR 7 (END LINE)
END (END LINE)
Sets the Model 705 to the
remote mode.
Clears the Model 705.
Programs the Model 705 for the
above parameters.
Obtain data string.
Display data string.
Program pause.
Clear 705.
End of program.
To start the program press the RUN key on the HP-85. After the
RUN key is pressed the Model 705 scans the programmed chan-
nels at the programmed interval rate. To stop the program simply
press the CONT key. The program will stop at the presently dis-
played channel when the CONT key is pressed. To resume the
program press the CONT key a second time or press the RUN
key. Upon pressing the RUN key or the CONT key (second time)
the Model 705 continues the program from the presently dis-
played channel.'
3-25