CONTREX MLP-Trim - Manual (Page 14)

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EXAMPLES OF MLP–TRIM
APPLICATIONS
Figure 1-1 is an example of a Master mode of operation for a pump application. The
scaling format allows the operator to enter a setpoint in Engineering Units of gallons per
minute. The MLP–Trim compares the sensor shaft feedback to the scaled setpoint and
calculates any speed error. When the MLP–Trim finds speed error, the control
algorithm adjusts the Speed Command Out to the motor drive and reduces the error to
zero.
Figure 1-1 MLP–Trim Master Mode
Motor Drive MLP–Trim
Motor
Sensor
Pump
Feedback Frequency
Speed
Command
Out
Contrex
CODE
SELECT
SET POINT
TACH
7 8 9
4 5 6
1 2 3
0 –
.
ENTER CLEAR
ontrex C