Advanced Settings - SJE VFDC-3000 Manual Del Usario

ADVANCED SETTINGS

Sensor Range
The Sensor Range setting is used to scale the 4-20mA signal of the pressure transmitter. The Sensor Range
should be set to the pressure at which the pressure transmitter is rated to output 20mA.
Sensor Offset
The Sensor Offset setting is used to offset the scale of the pressure transmitter to match actual pressure. The
Sensor Offset should be set to the difference of the trusted pressure reading and the current pressure reading
of the controller.
PID Proportional Term
The PID Proportional Term setting is intended to be adjusted by advanced users only. The PID Proportional
Term is used to adjust the reaction of the output frequency to changes in the system pressure. Increasing the
PID Proportional Term will allow the VFD to make larger corrections to the output frequency with differences
between the Setpoint Pressure and actual system pressure. Decreasing the PID Proportional Term will allow
the VFD to make smaller corrections to the output frequency with differences between the Setpoint Pressure
and actual system pressure.
PID Integral Term
The PID Integral Term setting is intended to be adjusted by advanced users only. The PID Integral Term is
used to adjust how quickly the output frequency reacts to changes in the system pressure. Decreasing the
PID Integral Term will allow the VFD to make quicker corrections to the output frequency with differences
between the Setpoint Pressure and actual system pressure. Increasing the PID Integral Term will allow the
VFD to make slower corrections to the output frequency with differences between the Setpoint Pressure and
actual system pressure.
PID Derivative Term
The PID Derivative Term setting is typically not used for pressure control applications and is intended to be
adjusted by advanced users only.
Setpoint Pressure 2
The Setpoint Pressure 2 is the target pressure to be maintained at the pump discharge when the Setpoint
Pressure 2 input is active on the controller. The setting cannot exceed the maximum range of the pressure
transmitter.
Pipe Fill Function
The Pipe Fill function is used to limit the maximum speed of the Lead VFD on startup to less than or equal to
the Pipe Fill Frequency for the Pipe Fill Time or until the Setpoint Pressure is reached, whichever comes first.
The Pipe Fill function can be disabled by setting Pipe Fill Time to "0.0". Note: If the Thrust Bearing function is
used, the Pipe Fill function will take precedence if the Pipe Fill Frequency is set lower than the Thrust Bearing
Frequency.
• Pipe Fill Frequency
The Pipe Fill Frequency should be set to the lowest frequency at which the lead pump is able to
overcome unfilled pipe head conditions to fill the piping system.
• Pipe Fill Time
The Pipe Fill Time should be set to the time at which the lead pump is able to overcome unfilled pipe
head conditions to fill the piping system, while running at the Pipe Fill Frequency.
Low Suction Alarm
At any time during operation, if the low suction input is active for the "Low Suction Delay Time", all VFD
operation shall immediately stop and a Low Suction Alarm is set. The system can be configured to
automatically restore operations after the input deactivates, or to require a manual reset.
• Low Suction Delay Time
The Low Suction Delay Time should be set so that false low suction conditions caused by an overly
sensitive pressure switch or the starting and stopping of adjacent pumping systems, do not interfere with
proper operation of the system.
• Low Suction Reset
Set the Low Suction Reset setting to AUTO to automatically restore normal operation of the system
upon the absence of a low suction input. In the MANUAL setting, the Low Suction Alarm remains active
until the ESC button is pressed and held for 2 seconds.
SJE ® 9 VFDC-3000 Controller User Manual