Rockwell Automation 937CU-DIFRQ_1 Universal Frequency Converter Installation Instructions - Manual (Page 31)

Bul. 937
C Universal Frequency Converter Installation Instructions
Current path characteristic
The various settings have the following meaning (for setting the starting value and final value, See
Start value
and final value; if you select the inverted characteristic, the conversion of starting value and final value will
be exchanged):
Setting 0 mA ... 20 mA
For this setting, the start value is converted to 0 mA and the final value to 20 mA. Intermediate values are
converted proportional.
Values less than the start value cannot be evaluated (output 0 mA). With values greater than the end value,
the output current increases linearly up to maximum 20.5 mA (102.5 % of the measuring range). Additional
overranges cannot be evaluated (output 20.5 mA).
Setting 4 mA ... 20 mA, acc. NAMUR NE 43
For this setting, the initial value is converted to 4 mA and the final value to 20 mA. Intermediate values are
converted proportional.
If the value falls lower than the start value, the output current falls linearly to a minimum of 3.8 mA (-1.25 %
of the measurement range). Additional underranges cannot be evaluated (output 3.8 mA). If the final value is
exceeded, the output current rises linearly to a maximum of 20.5 mA (roughly 103 % of the measurement
range). Additional overranges cannot be evaluated (output 20.5 mA).
20.5
20.0
0
0 100 102.5
mA
%
20.5
20.0
0
0 100  103 - 1.25
4.0
3.8
mA
%
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