Xylem HYDROVAR Smart - Manual (Page 26)

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7.18 2 nd Required Value
CONFIG. REQ. VAL.2
OFF
With this parameter CONFIG. REQ. VAL.2 you can
select a independent 2
nd required value.
The change between 1 st and the 2 nd required value can be done over the digital
input, terminal X1/14 on the control card. If this input is connected to Ground,
2 nd required value active.
Possible settings:
OFF: actual value 2 is not active (no change after closing the input X1/14)
INT: internal required value 2, function and setting according to existing required
value.
EXT ADC-I: the required value 2 is made from the value of the current signal (4-
20mA) at the terminals X1/12, X1/10. 20mA is equal to the programmed
SENSOR RANGE
. If the incoming current signal is below 4mA, there will be
shown an error message on the display, but no failure is indicated (failure relay
is not closed). In this case the required value 2 will be 0.
EXT ADC-U 0-10V: the required value 2 is made from the value of the voltage signal
of 0-10VDC at the terminals X1/13, X1/10 (Ground)
EXT ADC-U 2-10V: the required value 2 is made from the value of the voltage signal
of 2-10VDC at the terminals X1/13, X1/10 (Ground)
Example for connection of an external 4-20mA signal for the 2 nd required value:
Setting the required value2:
The active required value is shown in the actual display of the parameter required value.
When the 2
nd required value is active (digital input, terminal X1/14, closed), in the first line,
there is shown Required value 2. The second line will show the source of the 2 nd value,
which is selected in the parameter CONFIG. REQ VAL:2 (INT, EXT-ADC-I or EXT-ADC-U) and
also the actual value of this input.
INT: you can select your value with the Ï and Ð buttons
EXT: only display of the value of the 2
nd analogue input signal.
In case of saving, every time both required values are saved.
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