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The LOG Program
Feading the HFz4:21...
LOG: Setup file?
LLOGSET [ENDLINE]
LOGOATH:HFZ114: 2
Bf fer
readin:
Creating...
Fowsr down
loop OY oH
Fress
[Ff]
to abort...
Lome
The program reads the HP 3421 A internal configuration.
Enter the name of the example setup file.
Use the name LLOGOHTH for the data file. Since the disc
is on loop two in the example, the file name must include
the disc specifier, followed by the loop specifier.
For frequent file updates, buffered readings would reduce
power consumption in the disc drive.
In this example,
with one file access every 15 minutes, the buffering is not
required.
The program creates the data file.
Since group two (controlling the bath temperature) will
execute every 30 seconds, not much will be gained by
powering down the loop between groups.
In fixed site
installations such as the one illustrated, the HP 3421 A can
be powered from an a.c. outlet.
The program begins to run.
When 7:00 a.m. comes next,
group 2 will begin to execute. An hour later, group 2 will
begin to log temperatures.
Shortly after 4:00 p.m., the program will finish.
Once the L.LIL; program has created the data file, you can analyze the data using the FEFIET program,
or you can transmit the data to another computer. Use the TEHMH=FEF program (refer to section 12) if
you want to send the data to the HP 44456 System Software package on an HP Series 200 computer. Use
the MEDIZFE program (refer to section 13) if you want to send the data to an MS-DOS based
computer such as the HP 150, The Portable, or The Portable Plus.
The example setup, L.I1GZET, can be used over and over again. In our example, the setup could be used in
daily production for the darkroom, with the data file names changing to reflect the calendar days.
10-4
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