Xylem GOULDS e-AB Series, Instruction Manual

Page: 36 / 56

6.6.3 Drive configuration parameters
Parameter
number
Parameter name 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.
• If a 0-10V signal is supplied to terminals 7 and 8,
the pump automatically switches to ACT mode,
following the external signal.
• If the external signal is missing, the pump remains
in ACT mode, using the value set as setpoint using
the display.
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. 6.6.3),
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 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. 6.6.3), 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*]
G
rpmx10 Maximum pump speed setup.
6 System Setup and Operation
34 Smart Pump Range INSTRUCTION MANUAL