Free-Run Stop - Hitachi CP-X200 Instruction Manual

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Free-run Stop

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.
Motor speed
[FRS]
[FW,RV]
Option Terminal
Code Symbol
11 FRS
Valid for inputs:
Required settings
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.
B088 = 00
Zero frequency start
1
0
1
0
Function Name State
Free-run Stop
OFF
C001~C005
B003, B088, C011 to C015
Resume from motor speed
Motor speed
1
[FRS]
0
1
[FW,RV]
0
t
ON Causes output to turn OFF, allowing motor to free
run (coast) to stop
Output operates normally, so controlled
deceleration and stops motor
Example (requires input configuration—
see page 3–49):
5
See I/O specs on page 4–6.
B088 = 01
Wait time
B003
t
Description
FRS
4 3 2 1 L PCS P24