IEC 60870-5-104 (also known as IEC 870-5-104) is an international standard, released in 2000 by the IEC (International
Electrotechnical Commission). As can be seen from the standard's full
designation 'Network access for IEC 60870-5-101 using standard transport
profiles', its application layer is based on IEC 60870-5-101.
IEC 60870-5-104 enables communication between control station and substation
via a standard TCP/IP network. The TCP protocol is used for connection-oriented
secure data transmission.
IEC 60870-5-104 limits the information types and configuration parameters defined
in IEC 60870-5-101, which means that not all functions available in IEC 60870-5-101 are
supported by IEC 60870-5-104. For instance IEC 60870-5-104 does not support short time
stamps (3-byte format), the length of the various address elements is set to
defined maximum values. But in practice, vendors very often combine the
IEC 60870-5-101 application layer with the IEC 60870-5-104 transport profile, without
paying attention to these restrictions. This might then lead to problems, if a
device strictly applies the standard.
Interoperability between devices by different vendors is ensured by the
interoperability list, which is defined by the standard. In the list, the
function range is defined for each device by marking the applicable functions.
The common denominator between different vendor lists defines the
possible function range.
The biggest advantage of IEC 60870-5-104 is that it enables communication via a
standard network, which allows simultaneous data transmission between several
devices and services. Apart from this, the same pros and cons apply to
IEC 60870-5-104 sand IEC 60870-5-101. Issues that remain to be dealt with are the definition
of communication with redundant systems or networks and, with the use of the
internet, data encryption.
IEC 60870-5-104 Companion Standard IEC 60870-5-5, IEC 60870-5-4
TCP (RFC 793)
IP (RFC 791)
PPP (RFC 1661 & RFC 1662)
Transmission of IP datagrams over ethernet network (RFC 894)
Ethernet (IEEE 802.3)
Supported Information Types
Regulating step command
Single indication [1 Bit] with quality
Single indication [1 Bit] with quality and time tag
Double indication [2 bit] with quality
Double indication [2 bit] with quality and time tag
Measured scaled value with quality
Measured scaled value with quality and time tag
Measured normalized value with quality
Measured normalized value with quality and time tag
Measured floating point value with quality
Measured floating point value with quality and time tag
Bitpattern [32 bit] with quality
Bitpattern [32 bit] with quality and time tag
Counter value with quality
Counter value with quality and time tag
Step position value with quality
Step position value with quality and time tag
Event of protection equipment with quality and time tag
On-demand transmission (e. g. single indications, analogs, ...) Spontaneous transmission (e. g. single indications with time tag, ...) Direct command transmission (with select before operate) Clock synchronization File Transfer
Common Address of ASDU: 1..65535 Information object address: 1..16777215
Available Protocol Stacks
IEC 60870-5-104, Master
IEC 60870-5-104, Slave
Router for IEC 870-5-101 and IEC 870-5-104 protocols
Please note that the configurator is temporarily unavailable due to maintenance reasons.