Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 218)

Detailed Flowcharts
Appendix D
DĆ8
Figure D.9
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
10079–I
IS
Queue
Empty
?
Yes
WTMSG
Output Queue
A Message