Specifications Of The Industrial Ethernet Protocols; Modbus Tcp Protocol - Burkert 8619 Operating Instructions Manual

6.11

Specifications of the Industrial Ethernet protocols

6.11.1

Modbus TCP protocol

TCP port
Protocol
Network topology
IP configuration
Transmission speed
Data transport layer
Modbus function codes
Read/write register
Message mode
Input (Target to Originator)
Output (Originator to Target)
AI = Analogue Input, AO = Analogue Output, DI = Digital Input, DO = Digital Output, Target = Server,
Originator = Client.
36
502
Internet protocol, version 4 (IPv4)
• Tree
• Star
• Line (open daisy chain)
• Fixed IP
• BOOTP (Bootstrap Protocol)
• DHCP (Dynamic Host Configuration Protocol)
10 and 100 MBit/s
EtherNet II, IEEE 802.3
3, 4, 16, 23
Max. 125 read registers and 123 write registers per telegram
Server
• All diagnostics and errors informations are with the highest pri-
ority and can be read by a PLC (refer to the supplement related
to the digital communication for the Type 8619).
• AI / DI / AO / DO: value, status, unit
• Device and modules: status
• Functions: value, status, unit
• PVC: value, status, unit
20 Process Variables Network (PVN)
English
Type 8619
Technical data