Technical information

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UFFICIO T
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MANUALI
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ML2
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ML200 INGLESE
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50
The allowed range is from 0 to 120% of the 0..20 mA scale, 120% corresponds to 24 mA and does not depend on the
selected range (0…20 / 4…20 mA).
The NAMUR NE43 recommendations ask for a alarms signalling value for the current output lower than 3.6 mA
(<18%) or bigger than 21 mA (>105%). It would then be preferable to set the value of this function at the 10%, so
that the current value in case of the a.m. cases would be 2 mA, allowing the following diagnostics:
?? current < 2 mA - 5%: line interrupted, power supply failure or faulty converter;
?? 2 mA -5% ? current ? 2 mA + 5%: hardware alarm;
?? 4 mA ? current ? 20 mA: normal working range;
?? 20 mA < current ? 22 mA: out of range, measure above 100% f.s.
(POS. 29) Frequency output value in case of failure [Hz VAL.FAULT=% XXX]
Setting of the value the frequency output has to be in one case of the following cases:
?? Empty pipe
?? Coils interrupted
?? ADC error
The allowed range is from 0 to 125% of the frequency full scale value.
Although there are not specific rules regulating cases like this one, it would be convenient to use the failure information
as follows:
?? 0% Hz ? frequency ? 100% f.s.: normal working range;
?? 100% f.s. < frequency ? 110% f.s.: overflow, measure above the 100% of the f.s.;
?? 115% f.s. ? frequency ? 125% f.s.: hardware alarm condition.
This function is active only when one of the output channels is set as frequency.
MENU 5.INPUT
(POS. 30) Total Totaliser + reset enable [T+ RESET = ON/OFF]
Total direct (positive) flow totalizer reset enable. When this function is active, the totalizer maybe reset applying a
voltage on the on/off input or via the keyboard.