In ATV312 i want to run the motor on the low limit frequency not the maximum , what parameter should i set ?
The speed reference increased from local up/down button is stored in FC parameter and the value will be between LL to UL of speed setting. Low limit is the setting, which the speed will not go below the LL value. If you have increased the reference from key pad, when you restart the drive it will start form the previous reference only. However while operating form Terminal the drive will start form LL speed, if the reference in VIA terminal is not given.
If you want to operate the motor in some fixed speed value, you may use Preset speed function. There are 7 preset speed are possible through combination of 3 logic inputs.
-Please refer the attachment for operating the drive through PLC communication. The necessary parameter setting for Auto/Manual operation is explained in the attached solution guide. The communication parameter setting is explained for Modbus communication in Drive and the Modbus to Ethernet gateway. If you are using different communication, the parameter setting may change according to the protocol.