Mitsubishi Electronics FR-F740P ユーザーズマニュアル

The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 201)
*1

When the setting of Pr. 21 Acceleration/deceleration time increments is "0" (initial value), the setting range is "0 to 3600s" and the setting increments
are "0.1s", and when the setting is "1", the setting range is "0 to 360s" and the setting increments are "0.01s"

*2

Performing IPM parameter initialization changes the settings. (Refer to page 80)

When a power failure or undervoltage occurs, the inverter can be decelerated to a stop or can be decelerated
and re-accelerated to the set frequency.

0

0

Coasts to a stop

Coasts to a stop

—

1

Decelerates to a stop

Decelerates to a stop

Depends on Pr. 262 to 
Pr. 266 settings

2

Decelerates to a stop

Accelerates again

Depends on Pr. 262 to 
Pr. 266 settings

21

Decelerates to a stop

Decelerates to a stop

Automatically adjusts 
the deceleration time

22

Decelerates to a stop

Accelerates again

Automatically adjusts 
the deceleration time

3Hz

 0 to 20Hz

Normally operation can be performed with the initial value unchanged. But 
adjust the frequency according to the magnitude of the load specifications 
(moment of inertia, torque).

60Hz

 0 to 

120Hz

When output frequency 

≥ Pr. 263

Decelerate from the speed obtained from output frequency minus Pr. 262.

When output frequency 

< Pr. 263

 Decelerate from output frequency

9999

Decelerate from the speed obtained from output frequency minus Pr. 262.

5s

 0 to 3600/ 

360s 

Set a deceleration slope down to the frequency set in Pr. 266.

9999

 0 to 3600/ 

360s 

Set a deceleration slope below the frequency set in Pr. 266.

9999

Same slope as in Pr. 264

60Hz

 0 to 

400Hz

Set the frequency at which the deceleration slope is switched from the Pr. 264 
setting to the Pr. 265 setting.

⋅ Remove the jumpers across terminals R/L1 and R1/L11 and

across terminals S/L2 and S1/L21, and connect terminals
R1/L11 and P/+ and terminals S1/L21 and N/-.

⋅ When setting of Pr. 261 is not "0", the motor decelerates to a

stop if an undervoltage, power failure or input phase loss
(when Pr. 872 ="1"(input phase loss enabled)) occurs.

⋅ If an undervoltage or power failure occurs, the output

frequency is dropped by the frequency set in Pr. 262 .

⋅ Deceleration is made in the deceleration time set in Pr. 264.

(The deceleration time setting is the time required from Pr. 20
Acceleration/deceleration reference frequency to a stop.)

⋅ Change the deceleration time (slope) to a stop using Pr.265

when the frequency is too low to obtain the regenerative
energy, or in other instances. 

⋅ With the Pr.261 = "21 or 22" setting, the deceleration time is

automatically adjusted to keep (DC bus) voltage constant in
the converter when the motor decelerates to a stop.
(The Pr.262 to Pr.266 settings become invalid.)

Power supply

Remove the jumper

Inverter

S/L2
T/L3

S1/L21
P/+
N/

−

R1/L11

R/L1

Connect terminal
R1/L11 and P/+
and terminal
S1/L21 and N/-.

Pr.264
Power-failure 
deceleration time 1

Power-failure 
deceleration 
time 2

Time

Power supply

Output
frequency

Subtracted
frequency at
deceleration start

Power-failure 
deceleration 
time switchover 
frequency