GE 90-30/20/Micro manual System Communications Window Flow Chart

2

In the default Run-to-Completionmode, the length of the system communications window is limited to 50 milliseconds. If an intelligent option module makes a request that requires more than 50 milliseconds to process, the request is spread out over multiple sweeps so that no one sweep is impacted by more than 50 milliseconds.

a43066

START

ANY

REQUESTS NO IN QUEUE

?

YES

DEQUEUE A REQUEST

PROCESS THE REQUEST

NO WINDOW TIMER

TIMEOUT

?

YES

POLLING NO STOPPED

?

YES

RESTART POLLING

STOP

Figure 2-3. System Communications Window Flow Chart

GFK-0467K Chapter 2 System Operation 2-11