When using the GD28 to communicate with a PLC via EIP/EtherCAT/Modbus TCP, what can be done if the inverter loses power but the customer requires communication between the PLC and the GD28 to remain uninterrupted?
A: The key to maintaining communication is ensuring that the control board remains powered at all times. You can use an external 24V switching power supply to power the GD28 expansion card, thereby keeping the control board powered and maintaining communication with the PLC.
When a low-power SP100 is used to drive a pump of the same power rating, E4, E5, and E6 overcurrent faults may occur. What could be the cause? A: After analyzing the match between the output current and frequency, as well as the unpredictability of the three different overcurrent faults, it was determined that the issue is a hardware filtering problem. Recommendation: Slightly reduce the carrier frequency and slip compensation parameters, and fine-tune the settings based on on-site operating conditions until stable operation is achieved.
Q: In GD300-01A-RT model for Atlas Copco, we are facing regular IGBT failures. What could be the reason and recommendation?
A: During analysis, it was found that parameter P29.03 was not matching the motor nameplate kW rating. The parameter has now been updated as per the motor nameplate specifications.
Recommendation:
Do not modify any parameters in the P29 group, as this parameter group must always remain exactly the same as the VFD nameplate information. Any mismatch may lead to improper drive operation and can result in repeated IGBT failures.
Q: In the GD300-01A-RT 15 kW and 22 kW drives, can the P29 group parameters be changed to match the motor parameters to achieve the application requirements?
A: No. Changing the P29 group parameters is strictly prohibited. The P29 parameters must always remain as per the VFD nameplate/rated capacity. If any changes are required to meet the application requirements, they must be implemented through the customer's controller/PLC logic, not by modifying the P29 parameters. Any unauthorized modification of the P29 group may result in improper operation or damage to the drive
The EC160 control board reports E30. Can the problem be solved by replacing the control board, driver board, and IGBT?
No, because E30 is a safety circuit fault. E30 is usually caused by an issue with an external switch and has nothing to do with the control system. This is because the elevator's external safety switch is in an open state, and the system cannot detect the safety signal, thus triggering an alarm.First check the safety switches outside the elevator to see if they are disconnected or damaged.
A drainage malfunction occurs when the high-water level float valve inside the drain pan fails to drop. Please troubleshoot the following potential issues:
Check if foreign objects are blocking the high-water level float valve and preventing it from lowering.
If the unit is equipped with a condensate pump: first verify whether the condensate pump is functioning properly. Next, check for trapped air in the pipeline connecting the drain pan to the condensate pump — in other words, confirm if the pump’s inlet is fully filled with water.
For GD5000 products, after the motor is self-learning, how to deal with inaccurate motor parameters?
This situation does exist. First use the workshop's motor parameter estimation tool, type in the basic parameters on the motor nameplate, and then calculate the stator-rotor resistance, self-inductance, leakage inductance, and mutual inductance of the motor, and then conduct self-study.Compare the estimated value and the learning value of the P2 group. If the difference is large, you can reset the motor parameters of the P2 group, relearn, and then compare again; if the difference is not large, perform VF, SVC mode start and stop, if it is no problem.
In the GD300-01A-RT, for the P29 group of manufacturer parameter sets, if the inverter power is set according to the motor nameplate, will this prevent my GD300 from reporting dev and sto faults during internal testing and actual operation? Is this feasible?
It is not feasible. Setting the inverter power according to the motor nameplate will affect the accuracy of current detection, thereby making it more likely to trigger the occurrence of other faults. Additionally, the manufacturer's parameter group cannot be changed at will; if modification is necessary, it must be authorized by INVT engineers.
The Start/Stop commands should be available from two sources: the DCS and the local motor control box located beside the motor.There is no priority level for the two methods because it is a pulse signal, so there is no command conflict.
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