Italtecnica Sirio Manual Del Usuario página 26

–
(4.4) Ki integral constant: this adjusts the value of the integral constant for the PID controller that ensures constant
Ki
pressure in the system. If this value is increased, the output pressure value will be closer to the set-point value (error
10
reduction). If this value is too high it can cause instability in the adjustment (continuous pressure fluctuations ).
–
(4.5) Ki proportional constant: this adjusts the value of the proportional constant for the PID controller that
Kp
ensures constant pressure in the system. If this value is increased, the system is more reactive in the event of system
15
pressure variations . If the value is too high it can cause overpressure or brusque decelerations, with a subsequent
instability in adjustment (continuous pressure fluctuations ).
(4.6) Boost time: this adjusts boost time duration when, with the soft start disabled, the pump starts at maximum
Boost.t
frequency before the PID adjustment triggers. Increase this value if the pump is having difficulty starting (especially
1000 ms
with single-phase pumps). Reduce the value if the length of time generates an undesired increase in the system
pressure.
(5.0) Maximum ambient temperature:
T.a.max
protection against overtemperature triggers. This parameter can only be modified on specific manufacturer
75°C
authorisation, as it may affect safe unit operation
(5.1) Maximum IGBT module temperature:
T.i.max
cut-out protection triggers. . This parameter can only be modified on specific manufacturer authorisation, as it may
75°C
affect safe unit operation
(5.2) Frequency reduction index on ambient temperature: this sets the reduction index by which the inverter limits
T.a.red
the maximum frequency of the pump when close to the set maximum ambient temperature. The reduction is active
1Hz/°C
when the ambient temperature approaches the limit set in parameter 5.0 by less than 5°C. Once this threshold has
been exceeded, the maximum frequency of the motor is reduced by an amount equal to that set on the parameter for
each degree centigrade increase in temperature.
(5.3) Frequency reduction index on IGBT module temperature: this sets the reduction index by which the inverter
T.i.red
limits the maximum frequency of the pump when close to the set maximum IGBT module temperature. The reduction
1Hz/°C
is active when the ambient temperature approaches the limit set in parameter 5.1 by less than 5°C. Once this threshold
has been exceeded, the maximum frequency of the motor is reduced by an amount equal to that set on the parameter
for each degree centigrade increase in temperature.
Min.vol.
(5.6) Minimum mains voltage: this sets minimum mains input voltage before the under-voltage protection triggers.
200 V
(5.7) Maximum mains voltage: this sets the maximum mains input voltage before the over-voltage protection
Max.vol.
triggers. From this value it is possible to calculate the voltage value (approx. 30V lower), over which the pump
250 V
decelerates in a slow and controlled way to prevent hazardous DC bus voltage surges.
(5.9) Debug variables: This parameter is used for debug functions. It allows the display of certain internal process
Debug v
variables to analyse their trend during unit operation.
0
this
sets the maximum ambient temperature before the thermal cut-out
this
sets the maximum IGBT module temperature before the thermal
26
IT EN PT RU DE ES FR RO