21
www.bdsensors.de
CIT 400
7.3 In bounds / out of bounds
given:
tank (max. level 7 m); medium: water; probe 4-20 mA; measuring range 10 m
required: pen recorder on analogue output 4-20 mA, final peak of pen recorder 20 mA at 7 m;
the process transmitter has to indicate the max. filling level of the tank, relay 1 should
have the function of an out of bounds switch and relay 2 the function of an in bounds
switch (bound between 3 m and 4 m)
For using the out of bounds function, the menu "In 1" has to be set on "In".
Please note that the values in "S1on" and "S2on" usually have to be higher than the
values in "S1of" and "S2of". To exchange the switching points, please use the menu
contact inverting ("In 1" and "In 2")
in bounds function
out of bounds function
Programming
Select the menu "dlS1" in the menu level "dlSP".
Set the following values in the menu level "SinP":
ZPIn
=
0
(starting point of measuring range)
EPIn
=
10
(end point of pressure range)
dP
=
2
(decimal point position)
Select the menu "1" in the menu level "rELn" and set the following values:
HY 1/CP 1 =
CPon (window mode)
S1on
=
4
(switching point relay 1)
S1of
=
3
(reset point relay 1)
In1
=
In
(set point inverting relay 1)
Select the menu "2" in the menu level "rELn" and set the following values:
HY 2/CP 2 =
CPon (windows mode)
S2on
=
4
(switching point relay 2)
S2of
=
3
(reset point relay 2)
In2
=
St
(no inverting of relay 2)
Set the following values in the menu level "Aout":
outY
=
4-20
(output signal in mA)
ZPou
=
0
(min. measured value)
EPou
=
7
(max. measured value)
ON
S1on / S2on
OFF
S1of / S2of
ON
OFF
S1on / S2on
ON
S1of / S2of
OFF
