Mitsubishi FR-A800

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
288
PARAMETERS
Setting multiple acceleration/deceleration times (RT signal, X9 signal,
Pr.44, Pr.45, Pr.110, Pr.111, Pr.147)
• Pr.44 and Pr.45 are valid when the RT signal is ON or when the output frequency is equal to or higher than the frequency
set in Pr.147 Acceleration/deceleration time switching frequency. Pr.110 and Pr.111 are valid when the X9 signal is
ON.
• Even at the frequency lower than the Pr.147 setting, turning ON the RT signal (X9 signal) will switch the acceleration/
deceleration time to the second (third) acceleration/deceleration time. The priority of the signals and settings is X9 signal 
RT signal  Pr.147 setting.
• To input the X9 signal, set "9" in any of Pr.178 to Pr.189 (input terminal function selection) to assign the function to the
terminal.
• When "9999" is set in Pr. 45 and Pr.111, the deceleration time becomes equal to the acceleration time (Pr. 44, Pr.110).
• When Pr.110 ="9999" is set, the third acceleration/deceleration function is disabled.
• If the Pr.147 setting is equal to or less than the Pr.10 DC injection brake operation frequency or the Pr.13 Starting
frequency setting, the acceleration/deceleration time switches to the Pr.44 (Pr.45) when the output frequency reaches or
exceeds the Pr.10 or Pr.13 setting.
• Switching frequency for each control method
NOTE
• The reference frequency during acceleration/deceleration depends on the Pr.29 Acceleration/deceleration pattern
selection setting. (Refer to page 290.)
• The RT and X9 signals 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 (X9) signal acts as the second (third) function selection signal and makes the other second (third) functions valid.
(Refer to page 434.)
• 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.
Pr.147 setting Acceleration/deceleration time Description
9999 (initial value) Pr.7, Pr.8
Acceleration/deceleration time is not
automatically changed.
0.00 Hz Pr.44, Pr.45
Second acceleration/deceleration time is
applied from the start.
0.01 Hz  Pr.147  set frequency
Output frequency < Pr.147: Pr.7, Pr.8
Pr.147  output frequency: Pr.44, Pr.45
Acceleration/deceleration time is
automatically changed.
Set frequency < Pr.147 Pr.7, Pr.8
Not changed as the frequency has not
reached the switchover frequency.
Control method Switching frequency
V/F control Output frequency
Advanced magnetic flux vector control Output frequency before the slip compensation.
Real sensorless vector control,
PM sensorless vector control
Estimated speed converted as frequency
Vector control
Encoder feedback control
Actual motor speed converted as frequency
Time
Output frequency
(Hz)
Set
frequency
Pr. 147
setting
Pr.7
Pr.44
Pr.44
(Pr.45)
Pr.8
Pr.7
Pr.44
Pr.44
(Pr.45)
Pr.8
Pr.110
Pr.111
RT signal
X9 signal
ON
ON