Bibliography

TCP/IP

TCP/IP (German)
Configuration and operation of a TCP/IP network
by Kevin Washburn, Jim Evans
Publisher: ADDISON-WESLEY Longmann Verlag

TCP/IP (english)
Illustrated, Volume1 The Protocols
by W. Richard Stevens
Publisher: ADDISON-WESLEY Longmann Verlag

Modbus/TCP

http://www.modbus.org

TwinCAT

Beckhoff Information System:
https://infosys.beckhoff.com