CONTREX MLP-Drive - Manual (Page 83)

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Inverse Follower Mode
The Inverse Follower Mode is a variation of the Follower Mode. The Inverse Follower
Mode has an inverted setpoint. If you increase the value of the setpoint (CP-03 or
CP-04), then the ratio of Follower speed to Lead speed will decrease.
With the Inverse Scaling (CP-62) set to “2”, enter values in the Follower Setpoints
(CP-03 and CP-04) that represent the E.U. at which you want the system to operate.
The higher the setpoint value; the lower the Follower to Lead ratio speed.
The MLP–Drive comes factory pre-loaded with the default Control Parameters for the
standard Follower Mode. These default settings are not suitable for Inverse
applications and require modification. The factory default Control Parameters for the
standard Follower Mode are found in Table 3-34. To modify these default parameters,
refer to Table 3-35.
Table 3-34 Default Inverse Follower Control Parameters
CP Parameter Name Parameter Value
CP-62 Inverse Scaling 1 (Standard Scaling)
CP-21 Follower E.U. 1.000
Table 3-35 Entering Inverse Follower Control Parameters
CP Parameter Name Parameter Value
CP-62 Inverse Scaling Enter “2” for Inverse Scaling.
CP-21 Follower E.U. Enter the Engineering Units if the system
were to operate at the Max RPM Lead
(CP-33) and the Max RPM Feedback
(CP-34).