Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации, Страница: 210 / 512

Acceleration and deceleration Parameter
6 - 60
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 0Hz.
Set the acceleration time according to the following formula:
Deceleration time setting (Pr. 8, Pr. 20)
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:
Fig. 6-27:
Acceleration/deceleration time
I000006C
Example
쑴
When Pr. 20 = 50Hz (initial value), Pr. 13 = 0.5Hz
How to find the setting value for Pr. 7 when increasing the output frequency to the maximum
frequency of 40Hz in 10s.
쑶
Example
쑴
When Pr. 20 = 120Hz, Pr. 10 = 3Hz
How to find the setting value for Pr.8 when decreasing the output frequency from the maxi-
mum frequency of 40Hz in 10s.
쑶
Pr. 20
Hz
t
0
Pr. 7
Pr. 44 Pr. 8
Pr. 45
Output frequency
Acceleration
time setting
Pr. 20
Maximum operating frequency Pr. 13
–
------------------------------------------------------------------------------------------------------
Acceleration time from stop to
maximum operating frequency
×
=
Pr. 7
50Hz
40Hz 0,5Hz
–
-----------------------------------
10s
×
12.7s
=
=
Deceleration
time setting
Pr. 20
Maximum operating frequency Pr. 10
–
------------------------------------------------------------------------------------------------------
Deceleration time from maximum
operating frequency to stop
×
=
Pr. 8
120Hz
40Hz 3Hz
–
-------------------------------
10s
×
32.4s
=
=