5.6.12 Up-Down Operation
The inverter can control the speed of the motor using digital inputs set to the Up and Down
functions. The Up/Down operation can be applied to systems that use upper-lower limit switches.
Two digital inputs are required. One set to Up (increase speed) and one set to Down (decrease
speed) operation.
Up/down operation
frequency save
Px terminal configuration
The operation will follow the Up or Down inputs and will override other speed reference inputs.
Up-down Operation Setting Details
Select two terminals for up-down operation and set them to ‘19 (Up)’ and ‘20 (Down)’,
respectively. With the run command active, acceleration begins when the Up terminal signal
is activated. Acceleration stops and constant speed operation begins when the signal is
deactivated.
During operation, deceleration begins when the Down terminal signal is activated.
Deceleration stops and constant speed operation begins when the signal is deactivated.
Also, when both Up and Down signals are entered at the same time, constant speed
operation begins.
When set to Yes, the operating frequency is saved automatically in the following conditions:
the run command (Fx or Rx) is removed, a fault occurs, or the inverter is powered off.
When the run command is reapplied, or when the fault is cleared, or when power is
restored, the inverter resumes operation at the saved frequency.
To delete the saved frequency, set one of the multi-function (digital) terminals to 22 (U/D
Clear) and activate the input during constant speed operation. The saved frequency will be
deleted.