SIEMENS SINAMICS G120 Control Unit CU240E

After debugging, click the disconnect button and select the save method in the pop-up save dialog box: ① Save the inverter project to the PC; ② Upload parameter settings to PC; ③ Save the parameters from RAM to EEPROM, and disconnect the PC from the inverter after completion.

4. Factory reset operation

(1) Function Description

All frequency converter parameters can be restored to their factory settings through factory reset. During the reset process, the communication memory will be reinitialized, causing communication interruption between the PC and the frequency converter.

(2) Operation steps

Ensure that the frequency converter is online (if offline, click the "connect to target system" button).

Select the frequency converter that needs to be reset in the STARTER navigation area.

Click on the factory reset icon and follow the prompts to complete the reset operation.

Fault diagnosis system

1. Definition of faults and alarms

(1) Fault

Nature: The device is in a serious abnormal state, which can affect the safe operation of the system.

Handling mechanism: When a fault occurs, the frequency converter automatically stops through the OFF2 command, and the red SF (system fault) LED on the control unit lights up; The frequency converter can only be restarted after confirming the fault.

(2) Alarm

Nature: The equipment is in an extreme state (which may cause malfunctions) or a special temporary state (such as motor parameter identification), and does not affect the basic operation of the system.

Processing mechanism: No manual response is required, the alarm status will be automatically eliminated or continuously prompted as the working conditions change.

2. Common faults and their solutions

Fault code, fault cause, handling measures

F00001 overcurrent, motor power does not match frequency converter power. Check if the rated power of the frequency converter and motor are consistent to ensure matching

F00002 overvoltage, high power supply voltage or motor in power generation state. Check if the input power supply voltage is within the rated range and investigate the cause of the motor's power generation condition

F00003 undervoltage, power failure or low voltage. Check the stability of the power supply and troubleshoot power outages or voltage drops

F00004 frequency converter overheating, exceeding the upper temperature limit, check whether the motor load is overloaded, whether the carrier pulse frequency is set reasonably, whether the ambient temperature is too high, and install a cooling fan if necessary

F00005 frequency converter overload check whether the motor power matches, whether the load change cycle is reasonable, and optimize the load working conditions

F00041 motor parameter recognition failed. Check if the wiring from the motor to the frequency converter is correct and confirm if the motor nameplate data is accurately inputted

F00052 Power module hardware data read failure. Check if the connection between the control unit (CU) and the power module (PM) is secure and in good contact

F00062 MMC data is invalid. Copy MMC parameters again to ensure a complete and uninterrupted copying process

F00070 PLC setting value fault check parameter P2040 numerical setting to ensure that the setting value is correct and effective

F00071 USS setting value fault. Use STARTER software to check if the USS communication settings (such as baud rate, address, etc.) are correct

F00072 USS setting value fault check whether the communication status and parameter configuration of the USS main station are normal

F00090 Encoder Feedback Signal Loss Check if the encoder is securely installed and wired correctly, and re debug the encoder

After replacing the F0395 CU/PM with power on, copying the startup parameters, or confirming if the device replacement process is standardized due to EEPROM read errors, perform parameter copying or debugging again, and troubleshoot EEPROM faults

3. Common alarms and their meanings

Alarm code alarm meaning

The parameters and configuration settings of A0700 PROFIBUS master station are invalid, and the PROFIBUS configuration needs to be modified

A0702 PROFIBUS connection interrupted, check the connectors, cables, and PROFIBUS master station

A0703 cannot obtain the set value from the PROFIBUS master station (control word=0) or the set value is invalid. Check the output of the master station set value

At least one intermediate node of A0704 configuration is not working or has malfunctioned

A0705 cannot obtain actual value from frequency converter (no frequency converter fault)

A0706 r2041 No diagnostic information, there may be a PROFIBUS DP software malfunction

A0710 frequency converter detected a PROFIBUS communication fault, and the communication port on the control unit may have malfunctioned

A0711 PROFIBUS parameter is invalid, check P0918 address settings and parameter P2041

4. LED status indication diagnosis

The control unit displays the device status through two LED indicator lights, with the following specific meanings:

LED name, color, status, meaning

SF (system malfunction): The red lit device indicates a system malfunction related to software and hardware