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The LOG Program
Creating...
The program displays a status message while the data file
is being created.
Fower down
loop
OY oH?
The program asks if the HP-IL loop should be powered
down between readings.
or
Press
to power down loop 1 between groups, or
to
keep the loop alive. Note that the digital output channels
on the option 050 digital cards are not latched. They will
clear when the HP 3421A receives a loop power down
command.
Fress [+2]
to abort...
The program begins to log data.
Pressing [f]Q) at any
time will cause the program to close the data files and end
immediately.
When the program is between clusters of activity, the loop
is powered down and the HP-71 is placed in a low power
state.
The LCD remains on to indicate program status,
and the keyboard is alive to receive a keystroke if the
program is to be aborted.
Flags 0 to 4 will come on from time to time as the event
scheduler executes.
Clore
The program is finished. If flag -3 is not set, the HP-71
will go to sleep after the timeout period, powering down
the loop.
While the L.[J5 program is running, an error check is enabled to provide protection against HP-IL errors,
such as invalid frames being received due to power fluctuations, etc.
If an HP-IL error is encountered,
the program calls the subprogram FEWER which will attempt to restore the loop.
Refer to
appendix G for details about the FECIWER subprogram. If the error encountered is not an HP-IL error,
the program will end with the error message in the display.
10.2 LOG EXAMPLE
Let's continue with the example begun in section 8, "Defining A Data Logging Problem," and set up in
section 9, "The SETUP Program." Let's now use the L.[I[z program to execute the group setup stored in the
file LOGSET.
FEiLH LOG
[ENDLINE
Run the L.[15 program.
10-3
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