V&T Technologies Co., Ltd.
http://www.ecodrivecn.com
Appendix C FAQ
147
VII. Why did the inverter report E.AIF analog input abnormal error?
A: (1) Check if the jumpers of analog input type and control board are properly set. For the analog voltage
input, toggle the corresponding channel to the V end of the jumper; for the analog current input, toggle
the corresponding channel to the I end of the jumper.
A: (2) Check if the analog input exceeds 11V;
A: (3) When using the +10V power supply of the inverter control board, check if the voltage of +10V is lower
than 9V or higher than 11V. If yes, check if the resistance value between the +10V and the GND is less than
1KΩ after the
inverter is powered off completely.
VIII. Why did the inverter report E.P10 abnormal error?
A: Check if the voltage of +10V on the inverter control board is lower than 9V or higher than 11V. If yes,
check if the resistance value between the +10V and the
GND is less than 1KΩ after the inverter is powered
off completely.
IX. Why did the PLC and inverter have abnormal 485-based communication?
A: (1) Check if the data format, address and baud rate of the inverter are consistent with that of the PLC;
A: (2) Check if the PLC address needs Add 1 operation;
A: (3) Check if the PLC adopts Modbus RTU format;
A: (4) Check if the register address of the PLC is converted to hexadecimal format;
(5) Check if the 485 wires are properly connected.
X. Why did there exist abnormality upon parameter copying?
A: (1) The parameters for V5 inverter and V6 inverter cannot be copied between each other;
A: (2) The copy operation can be performed only when the upload and download function codes of the
inverter d1.09 (operation panel copy identification code) are consistent;
A: (3) The copy function can be completed only when the inverter is completely powered down and then
powered up after the download of the parameters for copy is completed.
XI. Why did the keyboard will have “8.8.8.8” display or have no display sometimes?
A: (1) Check if the connectors are properly connected when the operation panel is directly connected to the
inverter control board;
A: (2) Check if the connection wire signals are in one to one correspondence when the keyboard is
connected to the operation panel and inverter control board through customized extension wires;
A: (3) Check if the network cable connectors of the operation panel and inverter control board are
properly connected when standard network cable is used to connect the operation panel and inverter
control board.
XII. Why couldn’t display or modify the function codes of the operation panel?
A: (1) When the modification could not be performed, check if P0.01 is set as 1. If not, change it to 0.
A: (2) When the modification could not be performed, check if the function code has been set as
