CONTREX MLP-Drive - Manual (Page 47)

3 - 9
Master Mode
The Master, or stand-alone mode of operation, is a single motor operation. In this
simple mode of operation, the entire process is controlled by a single motor and one
MLP–Drive.
The MLP–Drive allows you to control your system in Master Engineering Units
(e.g., RPMs, gallons per hour, feet per minute). The Master Engineering Units at which
you want the system to operate are entered into the two available Master Setpoints
(CP-01 and CP-02). However, before the MLP–Drive can determine how to operate at
those setpoints, you must enter Scaling Control Parameters into the MLP–Drive.
Scaling is a convenient method for translating the relationship of the motor RPMs into
Master Engineering Units. The Scaling Control Parameters give the MLP–Drive the
following information:
Max RPM Feedback (CP-34)
Measured at the sensor shaft, this number is the maximum RPMs at
which you want your system to operate.
PPR Feedback (CP-31)
The number of gear teeth or number of encoder lines on the feedback
sensor per one revolution (pulses per revolution).
Master Engineering Units (CP-20)
The actual value of the Master Engineering Units if the system were to
operate at the maximum RPMs that you entered in Max RPM Feedback
(CP-34).
The factory default Control Parameters for Scaling are found in Table 3-4. To modify
the default parameters, refer to Table 3-5. Information on setpoint entry follows
Table 3-5.