Winco DGC-500 - Manual (Page 49)

DGC-500 Functional Description 3-29
Figure 3-20. Connecting State Diagram
Figure 3-21. Pre-Start 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 3-21 illustrates the Pre-Start state
flowchart.
Cranking State
This state will engage the starter and transition to the Running state once engine speed is above
crank-disconnect. During the Cranking state, the crank-type is checked. If the crank-type is Cycle Crank, then
the unit will transition to the Resting state when the crank time expires. If the crank-type is Continuous Crank
or is on the last crank cycle when the crank timer expires, then the Over-Crank flag is set to trigger the Alarm
state. If system configuration goes to Off/Auto-Off, the unit transitions to the Cooling state. In the Cooling
state, if ECU power support is needed, it will go to the Shutting Down state. The Cranking state flowchart is
illustrated in Figure 3-22.