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2. Modbus - Wikipedia

   en.wikipedia.org/wiki/Modbus

   Unit identifier is used with Modbus TCP devices that are composites of several Modbus devices, e.g. Modbus TCP to Modbus RTU gateways. In such a case, the unit identifier is the Server Address of the device behind the gateway. A MODBUS TCP/IP ADU/Modbus TCP frame format then will be: [31] [30]

3. IEC 60870-5 - Wikipedia

   en.wikipedia.org/wiki/IEC_60870-5

   The standard uses an open TCP/IP interface to network to have connectivity to the LAN (local area network) and routers with different facility (ISDN, X.25, Frame Relay etc.) can be used to connect to the wide area network (WAN). Application layer of IEC 104 is preserved same as that of IEC 101 with some of the data types and facilities not used.

4. List of IP protocol numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_IP_protocol_numbers

   1 ICMP Internet Control Message Protocol: RFC 792: 0x02 2 IGMP Internet Group Management Protocol: RFC 1112: 0x03 3 GGP Gateway-to-Gateway Protocol: RFC 823: 0x04 4 IP-in-IP IP in IP (encapsulation) RFC 2003: 0x05 5 ST Internet Stream Protocol: RFC 1190, RFC 1819: 0x06 6 TCP Transmission Control Protocol: RFC 793: 0x07 7 CBT Core-based trees ...

5. Fieldbus - Wikipedia

   en.wikipedia.org/wiki/Fieldbus

   Here we find the solutions Ethernet/IP, three versions of PROFINET IO - the classes A, B, and C - and the solutions of P-NET, [28] Vnet/IP [29] TCnet, [30] EtherCAT, Ethernet POWERLINK, Ethernet for Plant Automation (EPA), and also the MODBUS with a new Real-Time Publish-Subscribe MODBUS-RTPS and the legacy profile MODBUS-TCP.

6. DNP3 - Wikipedia

   en.wikipedia.org/wiki/DNP3

   The Remote Terminal Unit is initially interrogated with what DNP3 terms an "Integrity Poll" (a combined Read of Class 1, 2, 3 and 0 data). This causes the Remote Terminal Unit to send all buffered events and also all static point data to the Master station. Following this, the Master polls for the event data by reading Class 1, Class 2 or Class 3.

7. Simple Network Management Protocol - Wikipedia

   en.wikipedia.org/wiki/Simple_Network_Management...

   SNMP, SNMPv2, SNMPv3, and RMON 1 and 2. Addison Wesley Longman, Inc. ISBN 978-0201485349. Marshall T. Rose (1996). The Simple Book. Prentice Hall. ISBN 0-13-451659-1. RFC 1155 (STD 16) — Structure and Identification of Management Information for the TCP/IP-based Internets