CONTREX MLP-Drive User Manual
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Master Mode Analog Feedback Example
The following example demonstrates Master mode scaling using analog feedback:
A pump delivers 20.0 gallons per minute when the pump motor rotates at 1800
RPM. A tachometer connected to the pump motor produces a 10.0 volt signal
when the motor rotates at 1800 RPM. Master Setpoint 1 will be setup for an
operation of 12.0 gallons per minute. Master Setpoint 2 will be setup for an
operation of 17.5 gallons per minute.
Table 3-10 shows the scaling Control Parameter that would be entered for the above
system operation.
Table 3-10 Master Mode Feedback Allocation Example
CP
Parameter Name Value Remarks
CP-84
Analog Input
Allocation
CP-20
Master Engineering
Units
CP-01
Master Setpoint 1
CP-02
Master Setpoint 2
Allocates The analog input as the
feedback source.
This is the Engineering Unit value
that would be present if the analog
input were at 10.0 volts.
The desired Master Setpoint 1.
The desired Master Setpoint 2.
2
20.0
12.0
17.5