dooch N747D - Composition of Controller

6 BOOSTER PUMP SYSTEM
BOOSTER PUMP SYSTEM N747D
Major function
Description
Inverter-fix type Select inverter-fix type from menu.
LCD Monitor Displaying variety information through large LCD screen.
LCD Display in Korean
Easy operation and control for anyone by Korean menu.
Select display language
Select Korean(default) / English/ Chinese/ Spanish from
menu.
Control latest PID
Latest PID Control by micro processor.
sequential operation Operating and stopping motor sequentially.
Preventing idling In case of no water in suction piping, operating stop and
alarming
Skipping failed pump If any pump is failed, the next pump is operated skipping the
failed one.
Preventing excessive
current to motor
Automatic-trip in case operating current of motor is
abnormal.
Prevention of abnormal
high voltage
Preventing abnormal high voltage by pressure switch against
to any problems in pressure sensor.
Scheduled operation. Available to vary operating conditions by time/day/month.
Self-access operation Optimized operation through self-assessment
Alarming high pressure
When specified pressure/time is exceeded, pump stops and
alarm is given.
Alarming low pressure
When every pumps are operated under specified pressure
even during the continuous operating, then alarm is given
( preventing low pressure).
Correction of sensor
value
Correcting when sensor value does not match with analog
gauge.
Record operation data
and save
Record various operation data and save.
Display alarmed
description and save
Displays various alarmed descriptions and save.
Emergent operation Emergent operation by pressure switch in case controller
and pressure transmitter are in failure.
Shift operation After certain period of operation, main pump function is
shifted so that pumps can be operated equally.
Spare sensor Spare pressure sensor is connected, so that when one
pressure sensor is failed, other sensor is employed
automatically to replace the function.
Contact terminals by
pump
Outputs operation and error by pump to external contact
terminal.
Input external analog
data
Input of multi-functional external analog data
CAN communication
Supporting CAN and RS485 communication
485 communication
Inverter options
Operating with two inverters simultaneously
3. Composition of controller