Grass Valley XSwitch Feb 08 2006 - Manual (Page 34)

34 XSWITCH Installation and Operation Manual
Appendix A — Remote Activation
Figure 20. Receive Reply Packet
Receive Reply Packet
Input Byte? Time-Out?
Error
Yes
No
Yes
Yes
Count = 0?
Count = 0?
Error
Yes
No
No
Initialize Uart
1 Start Bit
8 Data Bits
1 Stop Bit
CRC <- 0
Count <- 3
Load Time-Out
(user defined)
Update CRC
Count<-Count - 1
Load Time-Out
(30 mSec)
Input Byte? Time-Out?
Count = 0?
Done
Yes
Yes
No
Yes
No
Count<- Len +2
Load Time-Out
(30 mSec)
Update CRC
Count<-Count - 1
Load Time-Out