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8 PARAMETER FUNCTIONS
8-31
8
8.5.6 Stall prevention operation level
Initial value
Pr. 22 "stall prevention operation level" 150
Setting Range Unit Remarks
0, 150 % When 0 is set, the stall prevention function is not activated.
When the output current reaches the Pr. 22 setting, the speed is varied with the running status to
suppress the torque. The setting is based on the rated motor current.
When the stall prevention function is activated, OL appears on the screen of the operation panel or
FR-PU04 parameter unit. That the stall prevention function has been activated can be exported as
OL signal from the terminal.
Refer to: 8.7.2 Selection of the control circuit output terminal functions
Initial value
Pr. 156 "stall prevention operation selection" 1
You can select whether or not to perform stall prevention operation according to the operation
status.
Operation Status Setting
Acceleration
Constant
speed
Deceleration Region
When OL signal is
output to continue
operation
When E. OLT is
displayed to stop
operation
Yes Yes Yes 1 17
No Yes Yes 3 19
Yes No Yes 5 21
No No Yes 7 23
Yes Yes No 9 25
No Yes No 11 27
Yes No No 13 29
No No No
Driving and
regenerative
15 31
Yes Yes Yes Driving
No No No
Setting
disabled
101 Regenerative
Refer to: Chapter 6, 6.1.1 Protective function activated
8.7.2 Selection of the control circuit output
terminal functions
MEMO
If the stall prevention function is activated during acceleration or deceleration, the
acceleration or deceleration time [Section 8.5.2] will be longer than the setting.
When the travel of a machine or the like is determined by the acceleration or
deceleration time, the travel will increase due to the operation of the stall prevention
function.
If the stall prevention function is activated during constant speed operation, the
running speed may vary abruptly.