Mitsubishi Electric FR-F800, Инструкция по эксплуатации

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Parameters (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
FR-F800 5 - 103
Setting the acceleration/deceleration time in the low-speed range (Pr. 791, Pr. 792)
If torque is required in the low-speed range (less than 10% of the rated motor frequency) under PM
motor control, set the Pr. 791 "Acceleration time in low-speed range" and Pr. 792 "Deceleration time
in low-speed range" settings higher than the Pr. 7 "Acceleration time" and Pr. 8 "Deceleration time"
settings so that the mild acceleration/deceleration is performed in the low-speed range. (When RT
signal is turned ON, the second acceleration/deceleration time setting is prioritized.)
NOTES The reference frequency during acceleration/deceleration depends on the Pr. 29 "Acceleration/
deceleration pattern selection" setting. (Refer to page 5-104.)
The RT signal can be assigned to an input terminal by setting Pr. 178 to Pr. 189 (input terminal
function selection). Changing the terminal assignment may affect other functions. Set parameters
after confirming the function of each terminal.
The RT signal acts as the second function selection signal and makes the other second functions
valid. (Refer to page 5-285.)
RT signal is assigned to the terminal RT in the initial status. Set "3" in any of Pr. 178 to Pr. 189 (input
terminal function selection) to assign the RT signal to another terminal.
I002555E
Fig. 5-19: Setting the acceleration/deceleration time in the low-speed range
NOTES Set Pr. 791 higher than Pr. 7, and Pr. 792 higher than Pr. 8. If set as Pr. 791 < Pr. 7, the operation is
performed as Pr. 791 = Pr. 7. If set as Pr. 792 < Pr. 8, the operation is performed as Pr. 792 = Pr. 8.
Refer to page 8-4 for the rated motor frequency of MM-EFS/MM-THE4.
Parameters referred to
Pr. 3 Base frequency => page 5-517
Pr. 10 DC injection brake operation frequency => page 5-525
Pr. 29 Acceleration/deceleration pattern selection => page 5-104
Pr. 125, Pr. 126 (frequency setting gain frequency) => page 5-260
Pr. 178 to Pr. 182 (input terminal function selection) => page 5-279
Pr. 264 Power-failure deceleration time 1 => page 5-426
Pr. 265 Power-failure deceleration time 2 => page 5-426
Acceleration time
in low-speed range
Slope set by Pr. 791
Acceleration time
Slope set by Pr. 7 Deceleration time
Slope set by Pr. 8
Low-speed range
(rated motor frequency/10)
Time
Deceleration time
in low-speed range
Slope set by Pr. 792
Output fr
equenc
y (H
z)