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Chapter 9 User interfaces
Universal inputs
(4-20mA mode)
4-20 mA
Overflow
Procedure in the event of measurement range
violations
Ignore
The measurement value is calculated
beyond the range limits.
Silent
cutoff
The measurement value is truncated at the
range limits.
Out of
range
l
The error value "OL" (open loop) is
issued, if the measurement value is
below 3.9mA.
l
If the measurement value is above
20.1 mA, the error value "SC" (short
circuit) is issued.
NAMUR
borders
l
The error value "OL" (open loop) is
issued, if the measurement value is
below 3.6mA.
l
The error value "UF" (underflow) is
issued, if the measurement value is
below 3.9mA.
l
The error value "OF" (overflow) is
issued, if the measurement value is
above 20.1mA.
l
If the measurement value is above
21mA, the error value "SC" (short
circuit) is issued.
Note: Additional explanation regarding the "Out of range" and "Namur borders" modes.
"Out of range" mode
"Namur borders" mode
Rev. 01
63
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