Keithley 705 Instruction Manual page 24

2.6 FRONT PANEL PROGRAMS
This section contains instructions necessary for operating the
13 internal programs of the Model 705. The programs are ac-
tivated by pressing the PRGM button along with the button
representing the appropriate program number. The programs
do a number of various tasks which are summarized in Table
2-3.
Program Notes
1. Each program is entered by pressing the PRGM button
followed by the desired program number.
2. Pressing the PRGM button selects the program mode and
displays the following:
j
As you have noticed, the question mark is flashing. This is
prompting the operator to enter the desired program
number (refer to Table 2-3). After entering the program
number the Model 705 goes into the program and then pro-
mpts the operator to enter numerical data. Numerical data
varies with each program.
3. New programs may be entered without clearing a program
that is presently running. To do so, press the PRGM button
followed by the desired program number.
4. Data is entered into the digit whose "c" segment is flashing
by pressing the desired number button. The "c" segment of
a display digit is shown below:
I3 w'c"
segment
As each digit is entered, the blinking segment moves one
place to the right until all the necessary digits have been
entered.
5. Only as many significant digits as necessary need to be
entered. The Model 705 will complete the constants with
trailing zeroes where necessary.
6. Invalid keys will be ignored. If an invalid key is pressed the
blinking "c" segment remains at the current digit.
7. If an incorrect digit is entered, the complete constant must
be re-entered. The new value may be entered by cycling the
display around to the beginning by repeatedly pressing one
of the number buttons.
Table 2-3. Summary of Front Panel Programs
1
1
t
Vogram Operation
0 Digital I/O (Input/Output)
1 American/International Date Forma.
2 Settling Time
3 Set Primary Address
4 Save Present Relay Set Up
5 Recall Stored Relay Set Up
6 Pole Configuration (I, 2 or 4)
7 Set Alarm
8 Self Test
90 Stand Alone Instrument
91 Master
92 Slave
99 Reset
8. If too many digits are entered, the display begins again at
the first digit on the left, All the digits in the constant must
then be entered again. This applies only to Programs 0,2,3,
6 and 7.
9. Once all the digits of the desired constants are shown on the
display, the constant is entered into the program by pressing
the ENTER button. This applies only to Programs 0, 1, 2, 3,
4, 5, 6 and 7.
2.6.1 Program 0 Digital l/O
Program 0 allows the user to control the outputs on the digital
I/O port. The I/O port is located on the rear panel of the Model
705. The output code is displayed in base eight (octal) on the
front panel. The actual I/O port output data is in 8 bit form.
The range of octal data that can be entered on the front panel
is 0 to 377. The maximum octal data is 377 which corresponds
to 11111111 in BCD. If the front panel data is entered as 377
then the digital I/O output data is 11111111. To initiate Pro-
gram 0 use the following procedure:
1. Press PRGM and the following is displayed:
1
Pro ? j
2. Press 0 and the following is displayed for approximately 0.5
seconds:
I uut II-I
After the out in message is displayed, the Model 705
displays the following:
uuuobol
Where the first three digits represent the digital output (in
octal) and the last three digits represent the digital inputs (in
octal).
NOTE
The digital I/O inputs are defined by the connec-
tions on the input pins. With no connections on
the input pins the inputs are undefined. The
digital I/O outputs are programmed by using Pro-
gram 0.
3. Press 0, 7, 7, ENTER. (Programs the output bits on the
digital I/O port for 00111111.)
2.6.2 Program 1 Date Format
Program 1 is used to select one of two date formats. The two
formats are the American date format and the International
date format. They are displayed as follows:
American - mm.dd where mm = month dd = day
Internation-dd.mm
To enable Program 1 and select the international date format
use the following procedure:
1. Press PRGM. (Selects program mode and displays Pro ?I.
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