Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 211)

Detailed Flowcharts
Appendix D
DĆ7
Figure D.7
TIMEOUT Subroutine
11660
TIMEOUT
RETURN
Scheduled By
•
Aborted By
•
WAKEUP
Wake Up the Process
Sleeping at WTRESP
(If Any)
STARTTIME
STOPTIME
Figure D.8
GETMSG Subroutine
GETMSG
RETURN
UNLINK
Remove a
Message from
Queue
Boxed area above must be executed
indivisibly, i.e., with the scheduler or
interrupts disabled, depending on
implementation.
Common
•
•
Output
•
No
SLEEP
Go to Sleep
at WTMSG
11661
Is
Queue
Empty
?
Yes
WTMSG
Output Queue
A Message