Dc Injection Braking Time Chart; Frequency Command Upper Bound (Cn-18); Frequency Command Lower Bound (Cn-19); Upper And Lower Bounds Of The Frequency Command - TECO speecon 7200ma Instruction Manual

Cn-07
Min. output frequency
DC injection braking at start

(12) Frequency Command Upper Bound (Cn-18)

(13) Frequency Command Lower Bound (Cn-19)

•The upper and lower bounds of the frequency command are set as a percentage of
the Max. output frequency (Cn-02 as 100%), in increments of 1%.
•The relationship Cn-18 > Cn-19 must be abided by. If not, an error message "Freq.
Limit Setting Error" may occur.
•When the frequency command is zero and a run command is input, the motor
operates at the frequency command lower bound (Cn-19). The motor will not
operate, however, if the lower limit is set lower than the Min. output frequency
(Cn-07).
Fig. 22 Upper and lower bounds of the frequency command
(14)Frequency Jump Point 1
(15)Frequency Jump Point 2
(16)Frequency Jump Point 3
(17)Jump Frequency Width
•These settings allow the "jumping" of certain frequencies within the inverter's
output frequency range so that the motor can operate without resonant oscillations
caused by some machine systems.
Cn-17
Fig. 21 DC injection braking time chart
Output frequency
100%
Cn-18
Cn-19
frequency command
(Cn-20)
(Cn-21)
(Cn-22)
(Cn-23)
Cn-14
DC injection braking
starting frequency
DC injection braking at stop
50
Cn-16
100%