What is IEC 104 protocol?

IEC 60870-5-104 Protocol (aka IEC 104) is a standard for telecontrol equipment and systems with coded bit serial data transmission in TCP/IP based networks for monitoring and controlling geographically widespread processes.

What is asdu in IEC 60870?

ASDU – Application Service Data Unit. Data structure that holds application layer information to exchange between a control centre and a remote terminal unit. IEC 60870-5-101/104 – Protocol serial or TCP/IP to exchange data from a substation to the control centre.

What is asdu?

The ASDU is the payload of the application protocol data unit (APDU). Its structure is defined in IEC 60870-5-101. The ASDU consists of the Data Unit Identifier and a number of Information Objects.

What is the difference between IEC 101 and IEC 104?

The differences are mainly in the representation of timestamp information. While IEC-101 uses timestamp of type CP24Time2a, that can represent timing information from one hour down to a millisec- ond, IEC-104 uses CP56Time2a which extends the one hour to 100 years with the same granu- larity of one millisecond.

What is information object address?

Information Object Address (1 or 2 or 3) Provides address of the information object element. Information Elements (n) Contains details of the information element depending on the type. Information Object-2.

Which is the application layer of IEC 104?

Application layer of IEC 104 is preserved same as that of IEC 101 with some of the data types and facilities not used. There are two separate link layers defined in the standard, which is suitable for data transfer over Ethernet & serial line (PPP – Point-to-Point Protocol).

What is the control field data of IEC104?

There are two separate link layers defined in the standard, which is suitable for data transfer over Ethernet & serial line (PPP – Point-to-Point Protocol). The control field data of IEC104 contains various types of mechanisms for effective handling of network data synchronization.

Which is the IEC standard for serial data transmission?

IEC 60870-5-104 Protocol (aka IEC 104) is a standard for telecontrol equipment and systems with coded bit serial data transmission in TCP/IP based networks for monitoring and controlling geographically widespread processes.

What is the type field for IEC 60870-5-104?

For IEC 60870-5-104 this field is used as type field with a fixed value of 0800 HEX. This field indicates the nature of the MAC client protocol ( IPv4 ). . IPv4 header .