CONTREX ML-Drive - Manual (Page 141)

C - 5
MP-43 FEEDBACK FREQUENCY
The Feedback Frequency (MP-43) displays the frequency of the Feedback Frequency Input
(J4 pin 4) in units of hertz (pulses per second). Feedback Frequency (MP-43) is not averaged or
filtered; it is the ten millisecond frequency calculation prior to the display update. Because
Feedback Frequency (MP-43) 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 as follows:
Two Decimal Places
MP-44 DEVIATION (ERROR)
Deviation (MP-44) displays the difference between the Ramped Reference (MP-46) and the
Feedback Frequency (MP-43) measured in units of hertz (pulses per second). Deviation is not
averaged or filtered; it is the ten millisecond frequency calculation prior to the display update.
MP-45 SCALED REFERENCE
The Scaled Reference (MP-45) is the scaled setpoint number converted to hertz. It is the
calculated value that is input to the Acceleration/Deceleration routine. This parameter may
display numbers that are larger than 9999. These larger values are displayed with two decimal
places. For example, 10,000 hertz is displayed as “10.00.”.
MP-46 RAMPED REFERENCE
The Ramped Reference (MP-46) is the calculated output of the Acceleration/Deceleration routine
in hertz. It is the setpoint input to the PID compensation routine. This parameter may display
numbers that are larger than 9999. These larger values are displayed with two decimal places.
For example, 10,000 hertz is displayed as “10.00.”