Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 233)

Detailed Flowcharts
Appendix D
DĆ23
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