V&T E5-H Series User Manual page 137

E5−H High Performance Universal Inverter User Manual
1KΩ after the inverter is powered off completely.
VII. 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.
VIII. 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 to be added by 1 (that is,"Address +1");
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;
A: (5) Check if the RS485 wires are properly connected.
IX. Why did there exist abnormality upon parameter copying?
A: (1) The parameters for E5 inverter, V5 inverter and V6 inverter cannot be copied between each other;
A: (2) 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.
X. 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.
XI. 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 to 1. If yes, change it to 0.
A: (2) When the modification could not be performed, check if the function code has been set to
modification disabled;
A: (3) When the modification could not be performed upon running, check if the function code could not
modification upon running;
A: (4) When display is not available, check if the inverter function code has been encrypted;
A: (5) When display is not available, check if the inverter operation panel has been locked;
XII. How to change the direction that the inverter drives the motor to rotate?
A: (1) In the case of operation panel control, the direction is determined by P0.07. However, the FWD/REV
key on the operation panel can real time change the direction.
A: (2) In the case of operation panel control, the direction is determined by P0.07. However, the UP/DN key
130 Appendix C FAQ