
Pulsing State
The Pulsing State follows the sequence of events shown in Figure 3-20. The Pulsing state will
momentarily power up the ECU to update the DGC-500 internal variables. Once a connection is
established with the ECU, GATHERING DATA will appear on the LCD for the duration of the settling time.
During settling time, the unit processes any previous request for clearing DTCs from the ECU. The
Pulsing state always transitions to the Ready state unless the System configuration changes to Run/Auto-
Run. Then, it will transition to the Connecting state as a result of pulsing and will follow the ECU Power
Support diagram.
Figure 3-20. Pulsing State Diagram
Connecting State
The Connecting State follows the sequence of events shown in Figure 3-21. If ECU communication is not
established by the time the Response Timeout expires, then the ECU Communications Failure Flag is set
to trigger the Alarm state. The Connecting state will power up the ECU. Once it reads the engine speed, it
checks if it is above Crank-Disconnect. If it is, then it will go to the Running state. Otherwise, it will go to
the Pre-Start state.
Figure 3-21. Connecting State Diagram
Pre-Start State
This state will transition immediately to the Running state if the engine speed is above Crank-Disconnect.
Otherwise, it will wait here and close the Pre-heat relay for the pre-start time delay duration. If engine
speed is below Safe-To-Restart (the rpm value used in deciding when to engage the starter) and the Pre-
start time delay is expired or set to zero, then it will transition to the Cranking state. If engine speed falls in
the range between Crank-Disconnect and Safe-To-Restart, the state will pause and display NOT SAFE
TO CRANK along with the rpm value until the engine speed moves out of this range. If it is not safe to
crank and there is a pre-start time delay, then the Pre-heat relay will stay closed because it was closed
when it was waiting for the pre-start time delay to expire. If Pre-start time delay was set to zero, then the
Pre-heat relay was never closed. Therefore, it would remain open while it is not safe to crank. Figure 3-22
illustrates the Pre-Start state flowchart.
3-32
DGC-500 Functional Description
9355400990 Rev H
Содержание DGC-500
Страница 1: ...INSTRUCTION MANUAL FOR DIGITAL GENSET CONTROLLER DGC 500 Publication 9355400990 Revision H 02 14...
Страница 2: ......
Страница 8: ...This page intentionally left blank vi DGC 500 Introduction 9355400990 Rev H...
Страница 10: ...This page intentionally left blank viii DGC 500 Introduction 9355400990 Rev H...
Страница 12: ...This page intentionally left blank ii DGC 500 General Information 9355400990 Rev H...
Страница 20: ...This page intentionally left blank 1 8 DGC 500 General Information 9355400990 Rev H...
Страница 22: ...This page intentionally left blank ii DGC 500 Human Machine Interface 9355400990 Rev H...
Страница 25: ...Figure 2 2 Rear Panel HMI 9355400990 Rev H DGC 500 Human Machine Interface 2 3...
Страница 28: ...This page intentionally left blank 2 6 DGC 500 Human Machine Interface 9355400990 Rev H...
Страница 51: ...Figure 3 9 Menu 1 Navigation 9355400990 Rev H DGC 500 Functional Description 3 21...
Страница 52: ...Figure 3 10 Menu 2 Navigation 3 22 DGC 500 Functional Description 9355400990 Rev H...
Страница 53: ...Figure 3 11 Menu 3 Navigation 9355400990 Rev H DGC 500 Functional Description 3 23...
Страница 66: ...Figure 3 28 Alarm State Diagram 3 36 DGC 500 Functional Description 9355400990 Rev H...
Страница 96: ......
Страница 98: ...This page intentionally left blank ii DGC 500 Installation 9355400990 Rev H...
Страница 118: ...This page intentionally left blank ii DGC 500 Maintenance and Troubleshooting 9355400990 Rev H...
Страница 122: ...This page intentionally left blank ii DGC 500 Time Overcurrent Characteristic Curves 9355400990 Rev H...
Страница 152: ...This page intentionally left blank C 6 DGC 500 Settings Record 9355400990 Rev H...
Страница 153: ......