Control Modes - Idex Pulsafeeder MPC Vector Installation, Operation & Maintenance Manual

Operations and monitoring that can occur from local operational mode include the following:
 Observation and entry of flow rate and RPM set points
 Starting/stopping the pump via Motor On/Off
Motor ON/OFF turns the pump on or off at anytime
 Placing the controller between the 2 operational modes, Auto or Manual
 Increasing or decreasing flow or motor speed with up/down arrows
 Providing system setup, digital I/O setup, Analog I/O Setup, and Calibration via Menu entry
 System calibrations – including pump flow, motor, analog I/O, PulsaGuard
 Observation of pump status (running/stopped/error) and mode (manual/auto)
1.2.4.2 Auto (Remote) Operational Mode
Auto (also referred to as Remote) operational mode utilizes control signals from a SCADA or PLC
system to control the pump flow (when in closed loop flow mode) or speed (when in sensorless vector
mode) and does not require the user to be present. This allows the MPC VECTOR to be operated
automatically and at remote sites.
Simple remote control can consist of start/stop control (digital dry-contact input). The pump flow rate
for simple control is set in local mode at a fixed user entered flow rate, once set, all remote start/stop
commands via a digital input will command the pump to run at that fixed user flow rate.
More complex flow rate control can be performed by using a 4-20mA current loop and a remote
start/stop digital input signal. The digital input signal will start and stop the pump. The analog input
signal will command the pump motor speed in sensorless vector control and pump flow rate in closed
loop control (flow meter in system configuration).
Operation, control, and monitoring that can be performed while in auto (remote) mode include:
1.2.5

Control Modes

The MPC Vector provides two types of flow process control. The flow control methods are dependent
upon whether the user's system provides an analog flow meter or not.
 Sensorless Vector control provides no process flow feedback information and is based upon a flow
rate versus motor RPM calibration. The internal calibration engine calculates the appropriate speed
based upon the user desired flow rate of the pump system.
 Closed loop control uses a flow meter placed in the flow path as feedback to the controller board.
The controller, knowing the process fluid flow rate is now able to adjust motor speed based upon a
PID algorithm. See Section 7.1.2 Analog Input 2 – Flow meter Feedback for set up of an analog
flow meter.
 Automatic Start/Stop via Digital Input (set up as Start/Stop).
 Process Flow or Speed Set Point Changes with 4-20mA input.
 Flow or Speed Monitoring via 4-20 mA output.
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