Matrix WellMate - Page 59

54
Appendices
Serial Port Communication Specifi cations
1. 9600 bps. STOP 1, PARITY-EVEN, X NONE,
BITS-7, ALL ASCII
2. Serial Cable Confi guration
3. Essential Message Format
Any message not included in SXT and EXT should
be ignored as noise.
4. Transmission Protocol
c. Transmission error with repeated “no response” is
to be judged by the transmitting side.
d. PC does not return “ACK” against “R”
transmission from WellMate.
GG
TXD TXD
RXD RXD
DTR DTR
DSR DSR
CTS CTS
RTS RTS
SXT ######## EXT
SXT (02H): Start of message
EXT (03H): End of message
a. Transmit Correct receive
ACK
b. Transmit Incorrect receive
No response
2 seconds delay
Re-transmit Correct receive
ACK