Automatic Start/Stop Procedures for HGM6320 Controller

The controller serves as the "brain" of a diesel generator set, regulating and protecting its operation. Below is a detailed overview of the automatic start/stop procedures for the HGM6320 controller used in Cummins generator sets.

Automatic Start Operation

Press the AUTO key; the indicator light next to the key will illuminate, indicating the generator set is in automatic start mode.

1.HGM6320 Trigger Condition: When the mains power is abnormal (overvoltage, undervoltage, overfrequency, underfrequency), the system enters the "mains abnormal delay" phase, with a countdown displayed on the LCD screen. After this delay, it proceeds to the "start delay" phase.

2.The LCD screen shows a "start delay" countdown.

3.Upon completion of the start delay, the preheating relay is activated, and the LCD displays "start preheating delay XXs".

4.After the preheating delay, the fuel relay is activated for 1 second, followed by the start relay. If the generator set fails to start within the "start time" window, both relays deactivate, and the system enters a "start interval" to wait for the next attempt.

5.If the generator set fails to start after the preset number of attempts, the first line of the LCD screen flashes, displaying a "start failure" alarm.

6.Upon successful start in any attempt, the system enters the "safe running time" phase, during which alarms for low oil pressure, high water temperature, underspeed, charging failure, and auxiliary input faults are temporarily disabled. After this delay, it transitions to "start idle delay".

7.During the start idle delay, underspeed, underfrequency, and undervoltage alarms remain inactive. Once this delay ends, the system enters "high-speed warm-up delay".

8.When the high-speed warm-up delay concludes:

If power generation is normal, the "generating" status indicator lights up.

If generator voltage and frequency meet load requirements, the generator closing relay is activated, the set begins supplying load, and the "generator power supply" indicator illuminates, indicating normal operation.

If voltage or frequency is excessively high or low, the controller triggers an alarm and shuts down the set.

Automatic Stop Operation

1.HGM6320 Trigger Condition: During normal operation or after mains power is restored, the system enters "mains voltage normal delay". Once mains power is confirmed stable, the "mains" status indicator lights up, and "stop delay" begins.

2.After the stop delay, "high-speed cooling delay" starts: the generator closing relay deactivates, and after a "switch transfer delay", the mains closing relay is activated, switching load to mains power. The "generator power supply" indicator turns off, and the "mains power supply" indicator illuminates.

3.If configured, the system enters "stop idle delay", activating the idle relay.

4.Next, the "power-off stop delay" phase begins: the power-off stop relay is activated, and the fuel relay deactivates.

5.The system then enters "generator stop confirmation time" to automatically verify if the set has come to a complete stop.

6.Once stopped, the set enters standby mode. If shutdown fails, the controller alarms with an "engine stop failure" message on the LCD screen.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to [email protected] we will pay highly attention on your question.