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16 Error and alarm messages
16.1 Error messages in float values and on the display
The float value itself is used for the display. The following statuses are defined.
In the event of an error, the device function reports this error in its output value itself. All device
functions monitor an input value for these error values. In the event of an error, the output value
is in turn set to one of these error values, or another value is specified in the configuration (error
value/replacement value).
16.2 Display of error messages for binary values
Binary input values are displayed with 0 and 1 only. If there is no valid input value, or if the de-
vice function is unable to supply a valid output value, the value is set to 0.
Exception
If, in the configuration level, you set which value the output should adopt in the event of an error
(error value/replacement value), this value is shown.
Display start/end:
This is used to define the scope of the display for the graphic display elements (upper and lower
limit for a bar graph display). The numeric representation is independent of the display start/
end and is produced over the entire measuring range.In the recording, measured values small-
er than the display start are saved as UNDERRANGE and measured values larger than the
display end are saved as OVERRANGE.
Bar graph display:
The numeric representation is independent of the display start/end and is produced over the
entire measuring range.In the recording, measured values smaller than the display start are
saved as UNDERRANGE and measured values larger than the display end are saved as
OVERRANGE.
Over- and underrange:
This is detected at the hardware limits/on the scaling in mV. The maximum possible scope of
display is therefore always available. For all the values calculated in the device such as math
output, flow, and external inputs, the following applies: The scope of display has the same sig-
nificance here as for the hardware inputs.
Error Float value display Display
First error value 1.0E+37
Software – underrange 1.0E+37 <<<<<<
Software – overrange 2.0E+37 >>>>>>
No valid input value 3.0E+37 -----------
Division by zero 4.0E+37 -----------
Incorrect mathematical value 5.0E+37 -----------
Display capacity exceeded ********
Invalid value -----------
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