Mitsubishi Electric 800 Series Instruction Manual page 271

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
Pr. Name
111
Third deceleration time
F031
791 Acceleration time in low-
F070 speed range
792 Deceleration time in low-
F071 speed range
1103 Deceleration time at
F040 emergency stop
1349 Emergency stop
G264 operation selection

Initial value for the FR-A860-00170 or lower.

Initial value for the FR-A860-00320 or higher.
Control block diagram
JOG
(Pr.16)
Output frequency Pr.147
(or Pr.147= "9999" )
Acceleration and
deceleration time
(Pr.7, Pr.8)
Output frequency Pr.147
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)
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.
Acceleration time setting = Pr.20  Acceleration time from stop status to maximum frequency / (maximum frequency -
Pr.13)
• 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".
Pr.7 = 60 Hz  10 s / (50 Hz - 0.5 Hz)
12.1 s
Pr.20
(60Hz)
Acceleration Pr.7 Deceleration
time Pr.44 time
Pr.110
270
PARAMETERS
Initial value
9999
9999
9999
5 s
0
RT-OFF
RT-ON
Output frequency Pr.147
Set
frequency
Time
Pr.8
Pr.45
Pr.111
Setting range
0 to 3600 s Set the deceleration time when X9 signal is ON.
9999 Acceleration time = deceleration time
Set the acceleration time in a low-speed range (less
0 to 3600 s
than 10% of the rated motor frequency).
The acceleration time set in Pr.7 is applied. (While RT
9999 signal or X9 signal is ON, the second or third function
is enabled.)
Set the deceleration time in a low-speed range (less
0 to 3600 s
than 10% of the rated motor frequency).
The deceleration time set in Pr.8 is applied. (While RT
9999 signal or X9 signal is ON, the second or third function
is enabled.)
Set the motor deceleration time at a deceleration by
0 to 3600 s
turning ON the X92 signal.
Droop control
0
enabled.
Droop control
1
enabled.
Droop control
10
disabled.
Droop control
11
disabled.
JOG-ON
X9-OFF
JOG-OFF
X9-ON
Output frequency 10% of the rated motor frequency
Description
Speed loop integration
enabled.
Speed loop integration
disabled.
Speed loop integration
enabled.
Speed loop integration
disabled.
Output frequency 10% of the rated motor frequency
Acceleration time
or
deceleration time