What is IEC 60870-5 part 104 protocol?
IEC 60870-5-104 protocol (aka IEC 104) is a part of IEC Telecontrol Equipment and Systems Standard IEC 60870-5 that provides a communication profile for sending basic telecontrol messages between two systems in electrical engineering and power system automation.
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 IEC103 protocol?
Standard IEC 60870-5-103 defines a multipoint communication protocol via which information can be exchanged between a control system (supervisor or RTU) and one or more protection devices. The control system is the master and the protection devices are the slaves.
What is asdu?
The application service data unit (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 a 101 and 104 protocol?
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.
Which protocol is used to packing data into the defined frame format and transmitting the data to the physical layer in Scada?
IEC 60870-5-104 (IEC 104) protocol is an extension of IEC 101 protocol with the changes in transport, network, link & physical layer services to suit the complete network access.
What is the difference between 101 and 104 protocol?
What is the difference between IEC 101 and IEC 104?
The protocols IEC 60870-5-101 (short IEC-101) and IEC 60870-5-104 (short IEC-104) are both used to transmit SCADA data. While IEC-101 is based on a serial transmission of data (e.g. us- ing RS-232 and FSK based modems), IEC-104 is packet oriented and is based on TCP/IP trans- mission.
What is RTU in Scada?
A remote terminal unit (RTU) is a microprocessor-controlled electronic device that interfaces objects in the physical world to a distributed control system or SCADA (supervisory control and data acquisition) system by transmitting telemetry data to a master system, and by using messages from the master supervisory …
Which is better RTU or PLC?
Because the functions of RTUs and PLCs overlap, RTUs tend to be used more for wide geographic telemetry, while PLCs are best suited for local area control.” Basically the explanation says: If you need a stand-alone controller with power for your application, a PLC is likely your best choice.
Where are RTUs used?
Remote terminal units (RTUs) are used in commercial and industrial systems throughout the world. Typical applications include the supervisory control and data acquisition (SCADA) systems used by electric, water and wastewater utilities.
What is HMI in SCADA?
SCADA stands for “Supervisory Control and Data Acquisition.” That HMI or “Human Machine Interface” unit on the SCADA can monitor and control anything that is connected to it. In conclusion, HMI can be part of SCADA but SCADA cannot be part of a HMI. It’s that simple.