Mitsubishi Electric FR-A820-00046 Instruction Manual page 447

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.
9999 (initial value)
Set frequency < Pr. 147
Tab. 5-95:
Output
frequency [Hz]
frequency
Pr. 147 setting
RT signal
X9 signal
Fig. 5-87:
● Switching frequency for each control method
Control method
V/F control
Advanced magnetic flux vector control
Real sensorless vector control,
PM sensorless vector control
Vector control
Encoder feedback control
Tab. 5-96:
FR-A800
(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
Pr. 147 setting
0.00 Hz
Output frequency < Pr. 147: Pr. 7, Pr. 8
0.01 Hz ≤ Pr. 147
≤ set frequency
Pr. 147 ≤ output frequency: Pr. 44, Pr. 45
Setting of Pr. 147
Set
Pr. 7 Pr. 44 Pr. 110
ON
ON
Changing the acceleration/deceleration time by switching the signals RT and X9
Control method and switching frequency
Acceleration/deceleration time
Pr. 7, Pr. 8
Pr. 44, Pr. 45
Pr. 7, Pr. 8
Pr. 8 Pr. 7
Pr. 111 Pr. 44
Pr. 45
Switching frequency
Output frequency
Output frequency before the slip compensation.
Estimated speed converted as frequency
Actual motor speed converted as frequency
Description
Acceleration/deceleration time is not
automatically changed.
Second acceleration/deceleration time is
applied from the start.
Acceleration/deceleration time is
automatically changed.
Not changed as the frequency has not
reached the switchover frequency.
Pr. 44 Pr. 8
Pr. 44
Pr. 45
Time
I002554E
5 - 245