CONTREX ML-TRIM - Manual (Page 43)

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
ML–Trim.
Caution: To avoid damage to your system, the ML –Trim must be calibrated and the
motor drive set up before you enter the Master Control Parameters. Refer to
Installation/Setup: Calibration, page 2-17.
The ML–Trim 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 ML–Trim can determine how to operate at
those setpoints, you must enter Scaling Control Parameters into the ML–Trim. Scaling
is a convenient method for translating the relationship of the motor RPMs into Master
Engineering Units. The Scaling Control Parameters give the ML–Trim 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. This number is identical to the
maximum operating speed that you set in step 7 of the calibration
procedure on page 2-20.
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. If you are uncertain how to enter a Control
Parameter, review the
Operations: Keypad section, page 3-3. Information on setpoint
entry follows Table 3-5.