Filter
Top Products
2-10 Series 90-30/20/Micro Programmable Controllers Reference Manual
–
September 1998 GFK-0467K
2
The following figure is a flow chart for the programmer communications portion of the sweep.
Figure 2-2. Programmer Communications Window Flow Chart
System Communications Window (Models 331 and Higher)
This is the part of the sweep where communications requests from intelligent option modules,
such as the PCM, are processed (see flow chart). Requests are serviced on a first-come-first-served
basis. However, since intelligent option modules are polled in a round-robin fashion, no intelligent
option module has priority over any other intelligent option module.
SETUP FOR
HAND-HELD
PROGRAMMER
?
NOT
ATTACHED
PREVIOUS
?
STATUS
STATUS
HAND-HELD
ATTACHED
PROGRAMMER
PREVIOUS
?
STATUS
START
NOT
ATTACHED
SEND INITIAL
PROCESS REQUEST
NO
YES
YES
NO
PROCESS KEY
SEND NEW DISPLAY
ABORT
a45659
PROGRAMMER
KEY
STOP
ATTACHED
ATTACHED
ATTACHED
PROGRAMMER
ATTACHED
PROGRAMMER
?
REQUEST
PRESSED
IN PROGRESS
OPERATION
SETUP FOR
PROTOCOL
SERIES 90
DISPLAY