48
If several HYDROVAR Master Inverters and even Basic Inverters are connected via the RS-485 interface, the
parameters in SUMBENU [200] can be entered on one unit and will be carried over to the other units in the
group. If programming only one unit press the button for 3 seconds and then choose the unit (1-8) for
which the parameters are being entered.
Select “ALL” to program all the units simultaneously.
Caution, if you select "ALL" the new settings will be copied to all units!
Ramp settings:
• The ramps inuence the rate of change in speed.
• The fast ramps 1 and 2 control the rate of acceleration and deceleration of the drive when the system
pressure is outside the hysteresis window, set at Parameter (0310). Default = 4 seconds. The ramps
should be lengthened, (increased) up to 15 seconds for higher horsepower drives to avoid overload er-
ror.
• The slow ramps 3 and 4 determine the acceleration/deceleration rates of the drive when the pressure is
within the hysteresis window. (Default = 70 sec.)
• The Ramps FminA and FminD are used for start-up and shut off. These parameters allow faster accel-
eration and deceleration and should be used for applications where pumps shouldn’t operate below a
determined frequency for a certain time. (to prevent damages or decrease wear) To adjust the Ramps,
press ▲ or ▼.
RA: Ramp F
min
acceleration Actual Value
RD: Ramp F
min
deceleration Output Frequency
R1: Ramp 1 – speed ramp fast increase
R2: Ramp 2 – speed ramp fast decrease
R3: Ramp 3 – speed ramp slow increase
R4: Ramp 4 – speed ramp slow decrease
set rated REQUIRED VALUE [02]
MIN FREQ [0250]
FMIN TIME [0260]
Time
RA
R3
R1
R3
R3
R3
R4 R4 R4
R4
R2
RD
Set HYSTERESIS [0315] in %
Set HYSTERESIS [0315] in %
WINDOW [0310]
setting in %
of the required
PROGRAMMING
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