Phase Technologies Essential Series - Page 31

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DISPLAY
MESSAGE
DESCRIPTION
DEFAULT/MIN
/MAX VALUE
OVERPRESSURE
PSI
This value is added to the value set by parameter
PSI SETPOINT. The combined value is the pressure
at which drive will stop the motor load. Motor will
restart when the pressure falls to the value set by
parameter DRAW DOWN PSI.
20/0/500
4-20mA PSI
SENSOR RANGE
As psi. This value should be set to the maximum psi
of the 4-20 mA transducer being used for constant
pressure control i.e. if the transducer has a range of
0-150 psi the parameter should be set to 150. This
parameter is critical for accurate pressure control.
150/50/500
DRAW DOWN
PSI
As psi. Provides hysteresis during sleep mode.
Parameter controls the pressure drop below PSI
SETPOINT to start motor in sleep mode, e.g. if psi
ON = 5 and motor turns off at 50 psi, motor will
restart at 45 psi.
5/0/50
PSI SETPOINT
In psi. This sets the level at which the pressure will
be controlled. Must be set as a psi value within in the
range of the 4-20 mA transducer. Make sure the
value of the parameter 4-20 mA psi SENSOR
RANGE is set to the maximum psi value of the
sensor being used. Make sure the proper SYSTEM
CONFIG parameter is set to 2. See Section 6.5,
System Configuration, for details. See Section 7,
Constant Pressure Systems, for instructions on
using advanced control options.
50/0/200
PSI OFFSET
This is used to calibrate the pressure that the VFD
registers from pressure transducer if a manual
pressure measurement is not equal to what VFD is
reading. For instance, if VFD reads 40 psi, but
manual measurement shows 50 psi, this setting
should be set to +10.
0/-50/50
Table 14 – Interface Parameters
DISPLAY
MESSAGE
DESCRIPTION
DEFAULT/MIN
/MAX VALUE
SYSTEM
CONFIG
(see Section 6.5
for detailed
information)
Sets the system configuration.
0 = RUN/STOP control using AUX1 and AUX2. Both
AUX1 and AUX2 must have a contact closure to run.
By default, AUX1 is programmed such that
OPEN=STOP, CLOSED=RUN and AUX2 is
programmed such that OPEN=RUN,
CLOSED=STOP. When SYSTEM CONFIG = 2
(Analog CP), AUX1 and AUX2 are programmed
such that OPEN=RUN, CLOSED=STOP. See
parameters AUX1 SELECT and AUX2 SELECT to
change this setting.
1 = Digital constant pressure control
2 = Analog constant pressure control
3 = 0-5 VDC speed control (potentiometer)
0/0/3
TROUBLE-
SHOOTING
Factory assisted use only. Contact manufacturer.
0/0/5