User Manual of EM730 Series Inverter 9.2 Protection analysis If the motor does not work as expected due to errors in function setting and external control terminal connection after the inverter is powered on, refer to the analysis in this section for the corresponding solutions. If a protection code is displayed, see the solutions in 9.1. 9.2.1 Failure in parameter setting of function codes The displayed parameters remain unchanged during the forward or reverse spinning of the digital potentiometer. When the inverter is in the running status, some code parameters cannot be modified without stopping the inverter.
The displayed parameters can be modified but cannot be stored during the forward or reverse spinning of the digital potentiometer. Some function codes are locked and cannot be modified. this occurs after the user password is set. When F12.02 is set to 1 or 2, parameter changes are restricted. Please set F12.02 to 0. Or, 9.2.2 Abnormality of motor rotation When the RUN key on the keyboard is pressed, the motor does not rotate. Terminal control of the start and stop: Check the setting of the function code The free stop terminal FRS and COM are closed: Disconnect the free stop terminal F00.02. FRS from COM. Switching of the running command to terminal is valid.
In this case, the running command is only subject to terminal control. This will be invalid if modified. The status combination of the running command channel is terminal control: Change it to keyboard control. The reference input frequency is set to 0: Increase the reference input frequency. The input power supply is abnormal or the control circuit fails. The control terminals RUN and F/R are ON, and the motor does not rotate. Enabling of the stop function by the external terminal is invalid: Check the setting of function code F00.02. Free stop terminal FRS=ON: Change the free stop terminal to FRS=OFF. Control switch failure: Check the control switch. 357