en – Original instructions
37
6.5.3 Drive Configuration Parameters
No. Parameter
Unit of
measurement
Description
P25 Control mode [ACT,
HCS, MSE, MSY]
This parameter sets the Control Mode (default value: HCS)
ACT
: Actuator mode.
A single pump maintains a fixed speed at any flow rate. ACT will
always try to minimize the difference between the speed setpoint
and the actual rotational speed of the motor.
HCS
: Hydrovar® Controller mode for single pump.
The pump maintains a constant pressure at any flow rate: the
Hydrovar® algorithm, based on the set of parameters from P26 to
P37 (see Par. 6.5.3), is implemented.
HCS mode must be set in conjunction with the use of an absolute
reading pressure sensor installed in the hydraulic circuit, which
supplies to the unit the pressure feedback signal: HCS will always try
to minimize the difference between the pressure setpoint and the
pressure feedback signal.
MSE
: Hydrovar® Controller mode for multiple pumps in Serial
Cascade.
Pumps are managed in series: only the last activated pump
modulates the speed to maintain the set pressure, while all the
others in operation rotate at the maximum speed.
The set of pumps, connected to each other through the multi-pump
protocol, maintains a constant pressure at any flow rate: the
Hydrovar® algorithm, based on the set of parameters from P26 to
P37 (see Par. 6.5.3), is implemented.
MSE mode must be set in conjunction with the use of absolute reading
pressure sensors, one for each pump, which supply to the set the
pressure feedback signal: MSE will always try to minimize the difference
between the pressure setpoint and the pressure feedback signal.
Using the multi-pump protocol, it is possible to connect up to 3
pumps, all of the same type and with the same power.
MSY
: Hydrovar® Controller mode for multiple pumps in Synchronous
Cascade.
The pumps are synchronised: they all keep the set pressure and
operate at the same speed.
Other characteristics: as for MSE mode.
P26 Max RPM set [ACT
set÷Max
rpmx10
Maximum pump speed setup.
P27 Min RPM set
[Min
*
÷ACT set]
rpmx10
Minimum pump speed setup.
P28 Ramp 1 [1÷250]
s
This parameter adjusts the fast acceleration time.
It affects the control of the pump for HCS, MSE and MSY control
modes (also see Par. 6.6.2).
Default: 3 s.
P29 Ramp 2 [1÷250]
s
This parameter adjusts the fast deceleration time
It affects the control of the pump for HCS, MSE and MSY control
modes (also see Par. 6.6.2).
Default: 3 s.
P30 Ramp 3 [1÷999]
s
This parameter adjusts the slow acceleration.
It determines:
•
The adjustment speed, in case of small flow rate variations
•
The constant outgoing pressure.
The ramp depends on the system being controlled, and affects the
control of the pump in HCS, MSE and MSY modes (also see Par. 6.6.2).
Default: 35 s.
*
Depending on the type of pump used
