Mitsubishi FR-A800

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
286
PARAMETERS
Control block diagram
Acceleration time setting (Pr.7, Pr.20)
• Use Pr.7 Acceleration time to set the acceleration time required to reach Pr.20 Acceleration/deceleration reference
frequency from stop status.
• Set the acceleration time according to the following formula.
• For example, the following calculation is performed to find the setting value for Pr.7 when increasing the output
frequency to the maximum frequency of 50 Hz in 10 s with Pr.20 = "60 Hz (initial value)" and Pr.13 = "0.5 Hz".
111
F031
Third deceleration time
9999
0 to 3600 s Set the deceleration time when X9 signal is ON.
9999 Acceleration time = deceleration time
791
F070
Acceleration time in low-
speed range
9999
0 to 3600 s
Set the acceleration time in a low-speed range (less
than 10% of the rated motor frequency).
9999
The acceleration time set in Pr.7 is applied. (While RT
signal or X9 signal is ON, the second or third function
is enabled.)
792
F071
Deceleration time in low-
speed range
9999
0 to 3600 s
Set the deceleration time in a low-speed range (less
than 10% of the rated motor frequency).
9999
The deceleration time set in Pr.8 is applied. (While RT
signal or X9 signal is ON, the second or third function
is enabled.)
1103
F040
Deceleration time at
emergency stop
5 s 0 to 3600 s
Set the motor deceleration time at a deceleration by
turning ON the X92 signal.
 Initial value for the FR-A820-00490(7.5K) or lower and FR-A840-00250(7.5K) or lower.
 Initial value for the FR-A820-00630(11K) or higher and FR-A840-00310(11K) and higher.
Acceleration time setting = Pr.20  Acceleration time from stop status to maximum frequency / (maximum frequency -
Pr.13)
Pr.7 = 60 Hz  10 s / (50 Hz - 0.5 Hz)
12.1 s
Pr. Name
Initial value
Setting range Description
FM CA
JOG
(Pr.16)
Output frequency Pr.147
(or Pr.147= “9999” )
RT-OFF
X9-OFF
JOG-OFF
JOG-ON
X9-ON
RT-ON
Output frequency 10% of the rated motor frequency
Acceleration and
deceleration time
(Pr.7, Pr.8)
Second acceleration and
deceleration time
(Pr.44, Pr.45)
Third acceleration and
deceleration time
(Pr.110, Pr.111)
Acceleration and
deceleration time
in low-speed range
(Pr.791, Pr.792)
Output frequency Pr.147
Output frequency Pr.147
Acceleration time
or
deceleration time
Output frequency 10% of the rated motor frequency
Running
frequency
Acceleration
time
Deceleration
time
Time
Pr.20
Pr.7
Pr.8
Output frequency
(Hz)
Pr.110
Pr.111
Pr.44
Pr.45
(60Hz/50Hz)