Справочник Пользователя для Mitsubishi Electronics FR-A700

⋅ Use Pr. 8 Deceleration time to set the deceleration time required to reach 0Hz from Pr. 20 Acceleration/deceleration

reference frequency.

⋅ Set the deceleration time according to the following formula.

⋅ Use Pr. 21 to set the acceleration/deceleration time and minimum setting range.

Setting 

"

0

"

 (initial value)......................0 to 3600s (minimum setting increments 0.1s)

Setting 

"

1

"

...........................................0 to 360s (minimum setting increments 0.01s)

Pr. 147)

⋅ Pr. 44 and Pr. 45 are valid when the RT signal is ON, or the output frequency reaches or exceeds the setting of Pr.

147. Pr. 110 and Pr. 111 are valid when the X9 signal is ON. When the RT signal (X9 signal) turns ON, the

acceleration/deceleration time switches to the second (third) acceleration/deceleration time even when the output

frequency has not reached the Pr. 147 setting. Priority of switching is X9 signal > RT signal > Pr. 147 setting.

⋅ For the terminal used for X9 signal input, set "9" in any of Pr. 178 to Pr. 189 (input terminal function selection) to assign

the function.

⋅ When "9999" is set in Pr. 45 or Pr. 111, the deceleration time becomes equal to the acceleration time (Pr. 44, Pr. 110).

⋅ When Pr. 110 = "9999", third acceleration/deceleration time is invalid.

⋅ If the Pr. 147 setting is lower than Pr. 10 DC injection brake operation frequency or Pr. 13 Starting frequency setting, the

acceleration/deceleration time switches to the Pr. 44 (Pr. 45) setting when the output frequency exceeds the Pr. 10 or

Pr. 13 setting.

⋅ Use Pr. 7 Acceleration time to set the acceleration time required to reach Pr.

20 Acceleration/deceleration reference frequency from 0Hz.

⋅ Set the acceleration time according to the following formula.

Example) How to find the setting value for Pr. 7 when increasing the output

frequency to the maximum frequency of 50Hz in 10s with Pr.20  =
60Hz (initial value) and Pr.13=0.5Hz. 

Example)How to find the setting value for Pr.8 when decreasing the output

frequency from the maximum frequency of 50Hz in 10s with Pr.
20 =120Hz and Pr. 10 = 3Hz.

⋅ Changing the Pr. 21 setting changes the acceleration/deceleration time setting (Pr. 7, Pr. 8, Pr. 16, Pr. 44, Pr. 45, Pr. 110, Pr. 111, Pr.

264, Pr. 265).
(The Pr. 611 Acceleration time at a restart setting is not affected.)
<Example>
When Pr. 21 = "0", setting "5.0" s in Pr. 7 and "1" in Pr. 21 automatically changes the Pr. 7 setting to "0.5" s.

Pr. 147 Setting

9999 (initial value)

No automatic switching of the acceleration/
deceleration time

0.00Hz

Second acceleration/deceleration time from a start

0.01Hz 

≤ Pr. 147 ≤ Set frequency

Output frequency 

< Pr. 147: Pr. 7, Pr. 8

Pr. 147 

≤ Output frequency: Pr. 44, Pr. 45

Acceleration/deceleration time automatic switching

Set frequency 

< Pr. 147

No automatic switching, since output frequency will 
not reach the switching frequency

Running 
frequency

Acceleration 
time

Deceleration 
time

Time

Output 

frequency 

(Hz)

(60Hz)

Acceleration 
time setting

=

×

Acceleration time from stop to 
maximum operating frequency

Maximum operating 

frequency - Pr. 13

Pr. 7 =

60Hz

× 10s  

12.1s

50Hz - 0.5Hz

Deceleration 
time setting

=

×

Deceleration time from maximum 
operating frequency to stop.

Maximum operating 

frequency - Pr. 10

Pr. 8 =

120Hz

× 10s  

25.5s

50Hz - 3Hz