Toshiba Toshiba Schneider Inverter Corporation

Inline duct fans [Fans, Pumps, Compressors]



 Application samples (2)

  Remote contorl by 4-20mA analog signal

By receiving a 4-20mA analog signal from an external controller, the inverter controls airflow as best.

   Connection diagram of the VF-nC3

Connection for 4-20mA control


   Setting table for the VF-nC3

Title Function Setting range Recommended setting
Command mode selection 0: Remote, 1: Local 0
Frequency setting mode selection 0: Terminak board, 1: Setting dial 1, 2: Setting dial 2, etc. 0
Analog input/logic input function selection 0 to 2 1
VI reference point 1 setting 0 to 100% 20 %
VI reference point 2 frequency 0 to 400Hz 60 Hz


  Process control(PID control) by a termperature sensor

The output freqency of the inverter is automatically controlled by a sensor signal. It will be a constant temperature control.

The inveter compares two signal and controls that the feedback signal is to be target temperature.
- Target temperature: Inverter's operating frequency
- Feedback signal: From a temperature sensor

ex.
Specifications of a temperature sensor:
 4mA = 0 degreeC, 20mA = 50 degreeC

Target temperature:
 20Hz operation frequency
  = 20 Hz / 60 Hz x 50 degreeC = 16.7 degreeC
 40Hz operation frequency
  = 40 Hz / 60 Hz x 50 degreeC = 33.3 degreeC
 60Hz operation frequency
  = 60 Hz / 60 Hz x 50 degreeC = 50 degreeC


   Connection diagram of the VF-nC3

Connection for PID control


   Setting table for the VF-nC3

Title Function Setting range Recommended setting
Command mode selection 0: Remote, 1: Local 0
Upper limit frequenct 0.5 ~ Maximum frequency[FH] 60
Preset speed frequency 1 Low limit frequency[LL] ~ Upper limit frequency[UL] 20 Hz
Preset speed frequency 2 Low limit frequency[LL] ~ Upper limit frequency[UL] 40 Hz
Preset speed frequency 4 Low limit frequency[LL] ~ Upper limit frequency[UL] 60 Hz
Input terminal function (R) 0 to 201 14
Analog input/logic input function selection 0 to 2 1
VI reference point 1 setting 0 to 100% 20 %
VI reference point 2 frequency 0 to 400Hz 60 Hz
PID control 0: Disabled, 1: Enabled 1
Proportional (P) gain 0.01-100.0 Depends on application
Integral (I) gain 0.01-100.0 Depends on application
Differential gain 0.00-2.55 Depends on application




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