Setting The Acceleration/Deceleration Time In The Low-Speed Range (Pr.791, Pr.792) - Mitsubishi Electric FR-F800 Instruction Manual

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
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.)
NOTE
• 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 583
Parameters referred to ???????
Pr.3 Base frequency page 497
Pr.10 DC injection brake operation frequency
Pr.29 Acceleration/deceleration pattern selection
Pr.125, Pr.126 (frequency setting gain frequency)
Pr.178 to Pr.182 (input terminal function selection)
Pr.264 Power-failure deceleration time 1, Pr.265 Power-failure deceleration time 2
190
PARAMETERS
Acceleration time
in low-speed range
Slope set by Pr. 791
Acceleration time
Slope set by Pr.7
for the rated motor frequency of MM-EFS/MM-THE4.
page 502
page 191
page 314
page 329
Low-speed range
(rated motor frequency/10)
Time
Deceleration time
in low-speed range
Slope set by Pr.792
Deceleration time
Slope set by Pr.8
page 426