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Home , Power inverter

VF-P7 has a wide range of applications

Air volume (temperature) control for fans, ventilators, blowers, etc. Rotational speed control for agitators

Function Related parameter Keeps the running as long as possible in the event of a momentary power failure. If the fan stops running due to a Ride-through control: Rotational speed VF-P7 momentary power failure, the inverter automatically restarts Auto-restart: setting 2) PP U V RR PP VF-P7 it immediately after recovery from the power failure. W Temperature setting Rotational speed Function Related parameter RR Restarts the motor without bringing it to a stop even if setting 1) CC (manual) CC the fan is coasting. If needed, the VF-P7 automatically Rotational speed () commands Temperature setting ＋ Motor speed search (auto-restart): II II between commercial power operation and 1)Application of currents of 4 to 20mA : = (auto) VI Regulates the rotational speed according to the viscosity CC Operation F － inverter operation. 2)Application of of 0 to 10V, potentiometer : = Operation command F command CC of the liquid to be agitated. CC Temperature sensor Automatically restart after tripping. Retry selection: (10 times maximum) 3)Panel setting : = Coast-stop command ST Overload stall selection: , Stall level setting: 4)Communications : = , and Continues operation without tripping at overload. Acceleration/deceleration time setting: , , Frequency FM(AM) Note: If you want to use the VF-P7 in conjunction with an explosion-proof motor in a location where chemicals are used, consult us beforehand. meter, Fan Fan to CC ammeter UVW Puts out a signal when an overload is detected. Over-torque detection: to Allows you to set a lower-limit rotational speed to Lower-limit frequency setting: prevent the fan from rotating in reverse direction. ST signal selection: , Input terminal selection: to Lets the fan coast stop. = (one function selectable) Thermal relay Thermal relay Detects low currents to prevent idling. Low-current detection: to Operates the fan, etc. so that it does not resonate with Jump frequency: to the machine. Operating a single pump Allows you to check the rotational speed and load of Meter output (FM, AM, FP and optional terminals): , the fan by means of external meters. to VF-P7 Allows you to the display from frequency to another Monitor display mode selection: PP Function Related parameter (switching information displayed with the power on). Function Related parameter setting RR Restarts the motor immediately after recovery from a pressure

Discharge Auto-restart: Controls the temperature or by regulating the Ensures stable operation even if the supply Supply voltage correction and output voltage limit: and ＋ momentary power failure. PID control selection: , CC II rotational speed of the fan. The VF-P7 is capable of fluctuates. PID constant adjustment: to Overload stall selection: , Stall level setting: controlling multiple fans, ventilators, or blowers. Allows energy-saving operation. V/f control selection: = or CC Continues operation without tripping at overload. Acceleration/deceleration time setting: , , Frequency FM(AM) － Switches between manual and automatic operation Rotational speed priority selecton: , , Cooling fan control selection: , meter, Pressure to CC sensor modes (switches between two setting signals). and Cumulative operation timer alarm: ammeter Puts out a signal when an overload is detected. Over-torque detection: to Other protective functions P24 Pump Switches from inverter operation to commercial power Commercial power/inverter switching: = , Undervoltage trip: to Stops the motor immediately if it becomes overloaded. Motor overload withstanding time: Output short circuit detection: to R1 OUT1 operation in case the inverter fails. Switching constant: to UVW Sets a lower-limit rotating speed to prevent fluid from P flowing in reverse direction. Lower-limit frequency setting: Detects low currents to prevent idling. Low current detection: to Automatically recovers from a trip. Retry selection: (10 times maximum) Allows you to check the rotational speed and load of the Meter output (FM, AM, FP, optional terminals) , Winder Re-winder control (speed/torque control with PG ) pump by means of external meters. to Allows you to switch the display from the frequency to Monitor display mode selection: another (switching information displayed with the power on). For regeneration operation, a braking resistor Function Related parameter Ensures stable operation even if the supply voltage Supply voltage correction and output voltage adjustment: Function Related parameter Speed/Torque or a braking resistor unit is required. Keeps the pressure, water level, etc. constant. PID control selection: , PID constant adjustment: to fluctuates. and To drive constant torque application with high accurate Motor control mode: = , , , or Allows energy-saving operation. V/f control selection: = or reference ＊2 Switches between manual and automatic operation Rotational speed priority selection: , speed and torque, PG feedback is required. With this, Motor tuning: to RR PA PB or PC modes (switches between two setting signals). and Controller Refer manual Cooling fan control selection: holding torque also can be generated. PG feedback: , , CC Switches to commercial power operation in case the inverter Motor speed search (auto-restart): Cumulative run timer alarm: Other protective functions For simple machine which does not need accuracy, Speed control with PG: , PG fails. Also, the VF-P7 allows you to switch manually between Commercial power/inverter switching: , Undervoltage trip: to sensorless is available. Torque control: to S1 VF-P7 inverter operation and commercial power operation. Switching constant: to Output short circuit detection: to

Depending on machine, VF-P7 can control speed or Speed / Torque control switch mode: = or , F ＊1 torque. They are switchable by an external signal. Speed / Torque control switch input: (S1) = ( ) VEC001Z, 002Z or 003Z CC For regeneration operation, a braking resistor (up to 22kW), a braking resistor unit (30kW or more) or Braking resistor operation: = , , Control to keep the water level constant Operating multiple pumps in parallel if the discharge Winder equivalent unit is required. pressure does not increase to a specified level Load speed / torque feedback Note: ＊1) For PG feedback control, one of our option VEC001Z, 002Z or 003Z is required. Flow switching (See Note below.) ＊2) RX terminal has capability to accept bipolar voltage reference. (RR terminal is only for monopolar.) PP VF-P7 Level sensor RR ＋ VF-P7 II CC Discharge pressure CC S1 setting － Feed water Pressure S2 P24 Thermal relay tank sensor Cooling water temperature control for cooling towers S3 R1 OUT1 S4 Constant-speed pump CC R2 OUT2 UVW Variable-speed Fan motor Commercial power backup circuit Storage pump PPpump UVW P

Three-phase Commercial power VF-P7 Reservoir Function Related parameter U R Parallel operation if a set speed reach signal is put out operation V S Detects the cooling water temperature with a PID control selection: , W T Parallel off if a low-speed detection signal is put out temperature sensor and keeps it constant by PID control. PID constant adjustment: to PP Temperature Function Related parameter setting RR PID control on/off PID control OFF selection: (S4 terminal) = ( ) S4 Function Related parameter CC According to the signal from the level sensor or flow CC Flow switching If the discharge pressure of the variable-speed pump Rotational speed (frequency) commands Operation F sensor, a flow switching command is issued to the VF- command CC (preset-speed operation): to , to does not reach the specified level though the pump runs Output terminal selection: Reduces the rotational speed of the fan at night for noise 1)Application of currents of 4 to 20mA : = CC I I P7 to keep the water level or flow rate constant. reduction. 2)Application of voltages of 0 to 10V, potentiometer : = at the maximum frequency, the constant-speed pump (OUT2) = ( ) (set speed reach signal) － ＋ Note: Signals (0 to 10Vdc, 4 to 20mAdc) from the level sensor can also be used to keep the water level constant by PID starts by set speed reach signal to operate the two Speed reach setting frequency: to 3)Panel setting : = control. pumps in parallel. 4)Communications : = , and Output terminal selection: Warm water Cuts off the constant-speed pump by putting out a low- Automatically switches from inverter operation to (OUT1) = ( ) (low-speed detection signal) Commercial power/inverter switching: = , speed detection signal. commercial power operation, using the backup switching Low-speed frequency: function, if the inverter fails. Switching constant: to

Cooling Temperature sensor water

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