4-2 Function Mode Analog Input Two types of external analog inputs are available for frequency reference. For voltage input, you can set a frequency from 0 to maximum by applying a voltage from 0 to 10 V between inputs FV and FC. For current input, apply 4 to 20 mA between inputs FI and FC. Note that voltage and current cannot be input simultaneously. Also, do not connect the signal lines for inputs FV and FI simultaneously. [AT] A001 Reference voltage (10 V) Frequency setting 4 Voltage input Current input Inverter VR Analog ground Functions „ Using the External Volume (VR) This is the general method that can be easily achieved.
Connect a variable resistor between terminal FS, a 10-V power supply inside the Inverter, and ground FC, and then connect its output to terminal FV. You can set the frequency by adjusting VR. The external VR should be that of 1 to 2 k Ω , 2W. External VR: 1 to 2 k Ω , 2 W „ Inputting the Voltage Input the voltage between terminals FV and FC. Input impedance is approx.10 k Ω . Do not input negative voltage. Doing so may result in damage to the Inverter. + - 0 to 9.6 V DC 0 to 10 V DC standard „ Inputting the Current Input the current between terminals FI and FC. Input impedance is approx. 250 Ω .
For the external analog input indicated above, use a shielded wire for connection and connect the shielded part to FC for stable operation. 4 to 19.6 mA 4 to 20 mA standard 4-73 FS FV FI FC FS FV FI FC A005 set value 02 03 04 05 AT terminal input status OFF ON OFF ON OFF ON OFF ON Analog input enabled FI-FC Volume FI-FC Volume FV-FC FI-FC FS FV FI FC FS FV FI FC FS FV FI FC