GEK-106310-AF
F650 DIGITAL BAY CONTROLLER
d-1
F650 Digital Bay Controller
Appendix D: IEC 60870-5-104 protocol
GE
Grid Solutions
IEC 60870-5-104 PROTOCOL
D.1 Introduction
The F650 implements functionality of an IEC 60870-5-104 server. The devices responds to client requests or can send
spontaneous transmissions. F650 implementation of 60870-5-104 provides analog metering and states.
The IEC 60870-5-104 communications protocol is supported on Ethernet ports A and B only.
D.2 Technical description
ASDU is the information unit used for data transmission. An ASDU may have data inside or not. The ASDU is encapsulated
in another package of the link layer. ASDU address takes up 2 bytes.
Communication frames can be control or data frames. Control strings do not have ASDU inside.
A frame is consisting of 3 parts. (2 of them are not always present):
Link data + [ASDU [ASDU data]]
The data between brackets can be omitted.
In IEC104 communication is made by TCP/IP protocols. Actually, it is a TCP communication. The default port is the 2404.
The F650 is listening as a server and supports up to two different IEC60870-5-104 masters simultaneously.
Summary of Contents for F650
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