Mitsubishi Electric FR-E700EX, Instruction Manual

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Setting of acceleration/deceleration time and acceleration/deceleration pattern
(2) Deceleration time setting (Pr.8, Pr.20)
 Use
Pr.8 Deceleration time
to set the deceleration time required to reach 0r/min from
Pr.20 Acceleration/deceleration reference
speed .
 Set the deceleration time according to the following expression.
(3) Set two kinds of acceleration/deceleration times (RT signal, Pr.44, Pr.45, Pr.147 )
 Pr.44 and Pr.45 are valid when the RT signal is ON, or the rotation speed reaches or exceeds the setting of Pr.147 .

When "9999" is set to
Pr.45
, the deceleration time becomes equal to the acceleration time
(Pr.44)
.
 For the RT signal, set "3" in any of Pr.178 to Pr.184 (input terminal function selection) to assign the function.
 Acceleration/deceleration time changes when the RT signal turns ON or the rotation speed reaches the Pr.147 setting or
higher.
(1) 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 speed
from 0r/min.
 Set the acceleration time according to the following formula.
Acceleration
time setting
=
Pr.20

Acceleration time from
a stop to the maximum
operating speed
Maximum operating speed
Example) How to find the setting value for Pr.7 when increasing the rotation
speed to the maximum speed of 2500r/min in 10s with Pr.20 =
3000r/min (initial setting)
Pr.7 =
3000r/min

10s = 12s
2500r/min
Deceleration
time setting
=
Pr.20

Deceleration time from the maximum operating speed to a stop
Maximum operating speed - Pr.10*

For Pr.11 = "0". When Pr.11

"0", "- Pr.10 " is not required.
Example) How to find the setting value for
Pr.8
when decreasing the
rotation speed from the maximum speed of 2500r/min in 10s with
Pr.20
= 3000r/min,
Pr.10
= 90r/min (initial setting) and
Pr.11
= 0.
Pr.8
=
3000r/min

10s 12.5s
2500r/min - 90r/min
REMARKS
 If the protective function (E.OLT) is activated due to insufficient torque in the low-speed range, set longer acceleration/
deceleration times in the low-speed range only by
Pr.791 Acceleration time in low-speed range and Pr.792 Deceleration time in low-
speed range .
Pr.147 Setting Acceleration/Deceleration Time Description
9999 (initial value) Pr.7, Pr.8 No automatic switching of the acceleration/deceleration time
0r/min Pr.44, Pr.45 Second acceleration/deceleration time from a start
1r/min

Pr.147

Set speed
Rotation speed < Pr.147 : Pr.7, Pr.8
Pr.147

rotation speed: Pr.44, Pr.45
Acceleration/deceleration time automatic switching

Set speed < Pr.147 Pr.7, Pr.8
No automatic switching, since speed will not reach the
switching speed

When the RT signal turns on, the acceleration/deceleration time switches to the second acceleration/deceleration time even when the speed is not
reached to
Pr.147 setting.
NOTE
 Changing terminal assignment may affect the other functions. Set parameters after confirming the function of each
terminal.
Running
speed
Acceleration time Deceleration time
Time
Pr.20
(3000r/min)
Pr.7, Pr.44 Pr.8, Pr.45
Rotation speed (r/min)
Time
Acceleration time Deceleration time
Rotation speed
(r/min)
Set
speed
Pr.147
setting
Slope set
by
Pr.7
Slope set
by Pr.44
Slope set
by
Pr.44
(Pr.45)
Slope set
by
Pr.8