Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE User Manual
Page 52
Operating Instruction
52
10.18 Start Value
START VALUE
disabled
This parameter gives you the start value after pump
stop in percentage of the required value (adjustable
between disabled and sensor range).
e.g.
required value:
72 PSI
start value:
36 PSI
If the pump system reaches the required pressure of 72 PSI and there is no
more consumption, the Technovar shuts off the pump. When the consumption increases
and the pressure goes down to or below the start value, 36 PSI, the pump will start.
Press on the Technovar to change to
10.19 2
nd
Required Value
CONFIG. REQ. VAL.2
OFF
With this parameter CONFIG. REQ. VAL.2 you can
select an 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 selections:
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 or
the required value 2 is made from the value of the voltage signal
EXT ADC-U 2-10V
(0-10V or 2-10V) at the terminals X1/13, X1/10 (Ground).
10 V is equal to the programmed SENSOR RANGE.
Setting the required value2:
The active required value is shown in the actual display of the parameter required value.
Is the 2
nd
required value 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 or EXT-ADC-I or EXT-ADC-U) and also the actual value of this input.
INT : you can select your value with the up- and down buttons
EXT: only display of the value of the 2
nd
analog input signal.
In case of saving, every time both required values are saved.
Press on the Technovar to change to