??????? Protocols ?????????????

1
??????? Protocols ?????????????
???????? ?? SCADA ??????? Protocols ??????? 200
??????????????? ????????????????????????????
Central Computer ??? Remote RTUs ,PLCs ??? Flow
Computer Standard ??????? Protocols
?????????????????????? 5 ??? 1. ASCII 2.
CAP 3. Modbus 4. Modbus X 5. IEEE 32
bit Single Format Floating Point
2
??????? Protocols ?????????????
1. ASCII
(American Standard Code for Information
Interchange) ?????????????????????????????????????
???????????????????????????????????????????
3
??????? Protocols ?????????????
2. CAP
(Compressed ASCII Protocol) ???? RTU Protocol
??????????? ???????????????????????????????? (Man
readable) ????????????????? (Reliability) ????
(Fast) ??????????????????? (Secure)
4
??????? Protocols ?????????????
3. Modbus
???? point-to-point PLC protocol
????????????????????? ???????????????
??????????????????????????????????? (Man
unreadable)
5
??????? Protocols ?????????????
4. Modbus X
????????????????????? Modbus Protocol
?????????????? Modbus ????????????????????????????
????????????
6
??????? Protocols ?????????????
5. IEEE 32 bit Single Format Floating Point
??????????????????????????? ??????????????????
23 ??? ??????????????? ?????????????????????????
National Instrument's Lookout ??????? Object
Oriented Software ,DDE ,SQL ??? WEB?