Operation and maintenance instructions
Series PRE proportional pressure regulator
External sensor version
5000056022
Ver. 00
26
components could be damage. Avoid continuously oscillations of regulator (you hear an
hammered noise). In this case decrease the K parameters values in order to eliminate the
oscillations.
•
KpUpCustom: proportional gain for upload coil
•
KiUpCustom: integral gain for upload coil
•
KdUpCustom: derivative gain for upload coil
•
KpDownCustom: proportional gain for download coil
•
KiDownCustom: integral gain for download coil
•
KdDownCustom: derivative gain for download coil
12.2.2.
Range setup
This group contains the parameters to set the regulation ranges. These parameters are available
only for versions with analog input:
•
Minimum target e Maximum target pressure: may be possible to set a minimum and a
maximum point of the regulated pressure range and is expressed as an absolute value [bar].
The software
“
UVIX
”
verifies consistency of the two values and ensures that the minimum
point is not greater than the maximum point.
This function enables the user to limit the regulated pressure range with respect to the
nominal range while continuing to use the entire range of the analog input signal on the PRE
series electronic regulator.
Therefore, a minimum and maximum value of the reference signal are associated with the
minimum and maximum point controlled
For example, if the minimum controlled point is set at 3 with a reference signal type 0-10V,
when the reference signal is 0V the regulated pressure moves to 3 bar.
For example, if the maximum controlled point is set at 8 with a reference signal type 0-10V,
when the reference signal is 10V the regulated pressure moves to bar.
This function does not always improve resolution, which may in any event be limited by the
intrinsic characteristics of the PRE series electronic regulator and its internal components.
The values
can also be set using the “SET” keys: the pressure value read by the internal sensor
is shown.
•
Minimum target e Maximum target signal: may be possible to set a minimum and a maximum
point of the reference signal.
The value that identifies these points varies between the minimum and maximum point of the
reference signal (±10V, 0÷10V or 4÷20mA depending on the code number of the PRE
electronic regulator). The software
“
UVIX
”
verifies consistency of the two values and ensures
that the minimum point is not greater than the maximum point.
This function enables the user to limit the reference signal range with respect to the nominal
range while continuing to control the entire range of the regulated pressure on the PRE
electronic regulator.
Therefore, the two maximum positive and negative values of the regulated pressure on the
PRE electronic regulator are associated respectively with the set minimum and maximum
reference signal values.
For example, if the type of reference signal is 0-10V and the minimum controlled point is set
at 2V and the maximum controlled point is set at 7V, at a reference signal of 2V the output
