Operation and maintenance instructions
Series PRE proportional pressure regulator
External sensor version
5000056022
Ver. 00
25
This operating mode allows to reach the target pressure with sufficient precision, according
to the dead band value set, and to define a wider range, defined by the set hysteresis value,
in which the regulator will not perform any regulation.
Compatibly with the application carried out by the regulator, it is recommended to set:
o
the dead band value as small as possible, in order to obtain a good regulation precision of
the regulated pressure
o
the hysteresis value as large as possible, generally greater than the dead band value, in
order to limit the number of actuations of the regulator.
•
External sensor filter cutoff: available only with FW version 3.01 or higher , this parameter
sets the cutoff frequency [Hz] of the digital filter applied to the external sensor signal. Use this
parameter to eliminate noise in the regulated pressure signal. A big value of this parameters
increases the time response of the regulator. If the value of this parameter is 0, the filter is
disabled.
•
Target signal filter cutoff: available only for FW version 3.01 or higher. This parameter sets the
cutoff frequency [Hz] of the digital filter applied to the analog target signal. Use this parameter
to eliminate noise in the analog target signal. A big value of this parameters increases the time
response of the regulator. If the value of this parameter is 0, the filter is disabled.
•
Pid mode:
if the “Custom PID enable” command is disabled, it
sets the PID gain based on the
volume used. The possible values are: SET1 (SLOW, suitable for small volumes), SET2
(MEDIUM, suitable for medium volumes), SET3 (FAST, suitable for large volumes). If the
"Custom PID enable" command is enabled, it displays the selection of the SET4 (CUSTOM)
value.
•
Custom PID enable: it allows you to select the SET4 (CUSTOM) value for the “Pid mode”
parameter. When this parameter is enabled, it is possible to indicate the values of the PID
gains. For details, refer to the
“Custom PID parameters” paragraph.
12.2.1.1.
Custom PID parameters
This group is available only if Pid Mode SET4 (CUSTOM) is selected and contains the
parameters in order to set the PID.
ATTENTION: the system could be instable if you use values too high. Increase carefully the K
parameters values. Do not create a system instability. The mechanical and electronic internal
Dead band
Dead band
Target pressure
No regolation
Pressure not stable:
Regulation
Regolation
Hysteresis
Hysteresis
Pressure stable: No
regolation
(A)
(B)
(C)
(D)
(E)
