MODBUS-TCP
～
～～ IEEE 802.3 CSMA/CD 10Mb/s
(1)10 Base 5 RG-8 500m
(2)10 Base 2 RG-58 185m
(3)10 Base T UTP STP 100m
～～ 100Mb/s 802.3a 100 Base Tx 100 Base Fx ～～ 10/100M 100M “ ” (UTP) 100m 2 3km 100km 1000Mb/s 802.3z/802.3ab 10Gb/s 802.3ae
～
～～ IEEE802.3 EN50081-2 EN50082-2 1 DIN UTP STP( )
～TCP/IP
1. TCP/IP
～～ TCP/IP
20 80 X.25 TCP/IP ( ) TCP/IP TCP/IP TCP/IP
Internet TCP/IP TCP/IP
～～ TCP/IP OSI OSI TCP/IP 1 TCP/IP
2. Internet Protocol(IP)
～～IP Internet RFC79 ( RFC: Request For Comments )
～～IP IP “ ” I/O IP IP IP “IP ” “ ” “ ” “ ” IP IP
～～IP IP 2
～～IP 4 ( 3 ) A 16387064 (1 126) B 64516 ( 128 191) C 254 ( 192 223) D (“0.0.0.0”) 1 (“255.255.255.255”)
3. Transmission Control Protocol (TCP)
～～TCP ( 4 ) RFC793 TCP TCP TCP
4. TCP
～～TCP (Socket) RFC1700 2 502
5. (Protocal)
～～ “ ” IP TCP TCP/IP TCP/IP Internet
Modbus ( 5 ) ( )
～ Modbus TCP
～～Modbus IANA(Internet Assigned Numbers Authority, ) Modbus TCP 502 Modbus ～～Modbus IETF(Internet Engineering Task Force, ) Internet 1978 Modbus Modbus TCP/IP 300 Modbus 90% I/O Modbus TCP/IP Modbus Modbus Modbus TCP C/C++ JA V A ActiveX Modbus TCP
1. Modbus TCP/IP
～～ TCP/IP 5
/
/
32 IP IP
Modbus
2. Modbus TCP
～～ TCP/IP Ethernet II 802.3 6 Modbus TCP 3
MBAP (MBAP Modbus Application Protocol Modbus ) 4 7
3
3. Modbus
～～ 3
(1) ( 4 )
(2) 65 72 100 110 RFC (3)
～～ 3
1. 0 / (fc.3)
(fc.16)
2. 1 (fc.1) (fc.2)
(fc.4) (fc.5) (fc.6)
3. 2
4. (fc.15) (fc.20) (fc.21)
(fc.22) (fc.23)
4. Modbus
1.～
2. ( 5)
3.Modbus TCP ( 6)
4.Modbus TCP
Connect() TCP 502
a. Modbus 7 MBAP
b. send()
c.
d. recv()
TCP
5.Modbus TCP
a.JA V A
b. Unix C
c. Win32 C
6.Modbus TCP
www. ( )
～ TCP/IP Modbus
1.～
2.TCP/IP 93% TCP/IP
Modbus TCP
3.
1.
2. Modbus TCP
Unix Linux Windows Modbus TCP SEMI
1. 100M
4000 Modbus TCP 125 (16bit) 4000×125=500000 (8000000 )
1.
I/O IP Web I/O TCP/IPModbus