Acc suspended time

Function
This function suspends acceleration/deceleration temporarily and let the inverter run in constant speed according to the brake delay during run/stop for transportation of heavy load. This will prevent occurrence of overcurrent at startup or slippage when stopping by adjusting the timing with the brake.
There are two ways to set dwell operation: automatic stop by setting the stop frequency and stop time and stop by using signals to the input terminal.

F349 Adjustment Range:
0: Disabled
1: F350-F353 setting
2: Terminal input

Setting method
Select whether to automatically suspend acceleration/deceleration by parameter settings or by signal input to the input terminal. This is set with [F349: Dwell operation].
• When [F349] is set to "1", you must also set parameters [F350: Acc suspended frequency] through [F353: Dec suspended time].
[F350: Acc suspended frequency] must be set to a value over [F240: Start frequency].
[F352: Dec suspended frequency] must be set to a value over [F243: End frequency].
When the frequency command value is the same as values set for [F350] and [F352] settings, dwell operation will not be enabled.
• When [F349] is set to "2", you must also assign function numbers "60", "61" (dwell operation) to the unused input terminal.
Important:
When output frequency falls due to the stall preventive function, dwell operation may be enabled.

Setting example: for automatic dwell operation
Set [F350: Acc suspended frequency], [F352: Dec suspended frequency], [F351: Acc suspended time], and [F353: Dec suspended time]. Then set [F349: Dwell operation] to "1".
When the output frequency reaches the set frequency, operation will automatically switch to constant speed run (acceleration/deceleration suspended).

Setting example: for dwell operation by external signal input
Assign function numbers "60", "61" (dwell operation) to the unused input terminal.
Dwell operation will be performed while the input terminal is ON.
When you set run command ON after you set the dwell operation signal ON, operation will start at [F240: Start frequency].
If the stall preventive function is enabled during dwell operation
Duration of any temporary output frequency change due to the stall preventive function will be included in the acceleration/deceleration suspended time.

Memo:
The stall preventive function automatically changes the output frequency when overcurrent, overload or overvoltage occurs. Specific functions that are set with each parameter are as follows:
- Overcurrent stall: [F601: Stall prevention level 1]
- Overload stall: [OLM: Motor overload protection characteristic]
- Overvoltage stall; [F305: Overvoltage limit operation]

Please reference latest AS3 Instruction Manual more details or latest information.

AS3 fault codes, descriptions, symptoms and suggested remedies can be found in the below links. Each fault code can also be linked to directly from the AS3 by accessing the QR code on a mobile device while the AS3 is currently experiencing the fault.