418

Free-run Stop

Operations and Monitoring

When the terminal [FRS] is turned ON, the inverter stops the output and the motor enters the free-run state (coasting). If terminal [FRS] is turned OFF, the output resumes sending power to the motor if the Run command is still active. The free-run stop feature works with other parameters to provide flexibility in stopping and starting motor rotation.

In the figure below, parameter B088 selects whether the inverter resumes operation from 0 Hz (left graph) or the current motor rotation speed (right graph) when the [FRS] terminal turns OFF. The application determines the best setting.

Parameter B003 specifies a delay time before resuming operation from a free-run stop. To disable this feature, use a zero delay time.

 

 

 

 

 

B088 = 00

 

 

 

 

 

 

 

 

 

B088 = 01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Resume from motor speed

 

 

 

Zero frequency start

 

 

 

 

 

 

 

Wait time

 

 

 

 

 

 

 

 

 

B003

 

Motor speed

 

 

 

 

 

Motor speed

 

 

 

 

 

[FRS]

1

 

 

 

 

 

 

 

 

 

 

[FRS]

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[FW,RV]

1

 

 

 

 

 

 

 

 

 

 

[FW,RV]

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t

 

 

 

 

 

 

 

 

t

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Option

Terminal

 

Function Name

 

State

 

 

 

Description

Code

Symbol

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

FRS

Free-run Stop

 

 

ON

Causes output to turn OFF, allowing motor to free

 

 

 

 

 

 

 

 

 

 

 

 

 

run (coast) to stop

 

 

 

 

 

 

 

 

 

 

OFF

Output operates normally, so controlled

 

 

 

 

 

 

 

 

 

 

 

 

 

deceleration and stops motor

Valid for inputs:

C001~C005

Required settings

B003, B088, C011 to C015

Notes:

 

When you want the [FRS] terminal to be active low (normally closed logic), change the setting (C011 to C015) that corresponds to the input

(C001 to C005) that is assigned the [FRS] function.

Example (requires input configuration— see page 3–49):

 

 

FRS

 

 

 

 

 

5

4

3

2

1

L

PCS

P24

See I/O specs on page 4–6.

Page 157
Image 157
Hitachi X200 Series instruction manual Free-run Stop, Terminal Function Name, B003, B088, C011 to C015