CONTREX ML-TRIM - Manual (Page 140)

C - 4
CP-31 PPR FEEDBACK
PPR Feedback (CP-31) is the number of gear teeth or number of encoder lines on the Follower
feedback sensor per revolution (pulses per revolution).
CP-33 MAX RPM LEAD
Measured at the Lead sensor shaft, Max RPM Lead (CP-33) is the maximum RPMs at which the
Lead will operate your system. This number is not to be confused with the full capacity at which
the Lead is capable of running. A system is not generally run at full capacity.
CP-34 MAX RPM FEEDBACK
Measured at the sensor shaft, Max RPM Feedback (CP-34) is the maximum RPMs at which you
want your system to operate and is not to be confused with the full capacity at which your
system is capable of running. A system is not generally run at full capacity. This number is
identical to the maximum operating speed that you set in step 7 of the calibration procedure,
page 2-20.
MP-40 TACH
In the Master mode, Tach (MP-40) will display the feedback in Master Engineering Units (CP-20).
In the Follower mode, Tach (MP-40) will display either the E.U.s/Time or the feedback to Lead
ratio in Follower Engineering Units (CP-21), depending on the value in Display Mode Follower
(CP-64). In Jog or the Direct mode, Tach (MP-40) will display the feedback in RPMs. The
feedback is read by the ML–Trim every ten milliseconds. The readings are summed, then
averaged for one second before the Tach is displayed.
MP-41 LEAD FREQUENCY
The Lead Frequency (MP-41) displays the frequency of the Lead Frequency Input
(J5 pin 3) in units of hertz (pulses per second). Lead Frequency (MP-41) is not averaged or
filtered; it is the ten millisecond frequency calculation prior to the display update. Because Lead
Frequency (MP-41) is not averaged or filtered and because of sensor irregularities, it may
appear less stable than Tach (MP-40).
Numbers that are larger than 9999 are displayed with two decimal places. For
example, 10,000 hertz is displayed like the figure in Feedback Frequency, MP-43.