Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual de usuario Pagina 233

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Detailed Flowcharts
Appendix D
D23
Figure D.27
GETRAW
Subroutine
GETRAW
Disable Processor
Interrupts
Enable UART
Receive Interrupt
Byte in
UART
?
Disable UART
Received Interrupt
Check Parity,
Framing, and ???
SLEEP
Wait For RXD
Interrupt at
RXDWAIT
Error
?
Get Byte
From UART
Enable Processor
Interrupts
RETURN
Set Receiver
Error Flag
Discard
Bad Data
Reset UART
Error Flag
10097–I
NOTE: This figure assumes the use of
a Z80 S10.
No
Yes
Yes
No
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