*PRINTER OFF LINE - Printer mode status error message.
The *PRINTER OFF LINE error message indicates that the printer is off line and not ready. The
Level Plus communication software observes the CTS input line for printer not ready conditions. If
a print has been scheduled and the CTS line is low for more than 5 seconds, the above message
is displayed for 3 seconds and the current print buffer is purged. The Level Plus will try to print
again at the next scheduled print interval. This error message will only appear if the Level Plus is
programmed for printer mode. If the monitor is programmed for host communications and the
CTS line is inactive, *CTS COMM ERROR message is displayed.
The volume software also provides the user with informational system error messages. These
messages generally indicate that the software requires additional information or data to perform
the desired volume calculations. The example screen below indicates that the software was
unable to determine the gross observed volume for tank #2 because an interpolation error was
encountered. The software displays *INTP ERR in the respective data fields.
Volume system error message example
Possible causes for the *INTP ERR message include:
A. Current level value is less than first level entry in the strapping table or greater than the last entry
in the strapping table (i.e out of range).
B. Negative level value passed to the interpolation function.
C. Erroneous entry encountered in strapping table.
D. Level value exceeds allowable range of associated tank volume equation
E. Calculated interface volume value exceeds calculated total volume value.
F. Erroneous entry encountered in VCF correction table.
G. Current temperature value is less than first temperature entry in the VCF correction table or
greater than the last entry in the VCF correction table (i.e out of range).
Other volume related system error messages and their possible cause are listed below.
*LEVL ERR - Volume data could not be calculated because of missing level information or level
error messages active.
Possible causes for the *LEVL ERR message include:
A. See level related system error messages in previous section.
*TEMP ERR - Net volume data could not be calculated because of missing temperature informa-
tion or temperature error messages active.
Possible causes for the *TEMP ERR message include:
A. See temperature related system error messages in previous section.
B. Temperature function not enabled for selected tank gauge.
#1 112.99 in 80.5 °F
GOVP *INTP ERR GAL
GOVI *INTP ERR GAL
PRDHH INTLO TMPHI
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