ABB Relion 615 series, Manual

3.3 

IEC 60870-5-103 process data

3.3.1 

IEC 60870-5-103 data objects

The IEC 60870-5-103 protocol in 615 series IEDs is built on top of the internal
IEC 61850 data model. Thus, the IEC 60870-5-103 application data objects and
Class 1 events are derived from IEC 61850 data objects and data set reporting. The
615 series IEDs have a predefined IEC 61850 data set configuration. In other
words, it is predefined which internal data object changes the 615 series IEDs detect.

The available IEC 60870-5-103 Class 1 data objects in the 615 series IEDs are
selected from the objects predefined in the IEC 61580 data sets. IEC 61860 data set
reporting and IEC 60870-5-103 Class 1 event reporting are basically identical.

For a list of the available data objects, see the point list manual.

3.3.2 

Indications

The IEC 60870-5-103 standard defines indications to be of ON/OFF type. The
value coding for indications is always DPI, where only values 1 and 2 (binary 01
and 10) are used. Value 1 means OFF and value 2 means ON. Indications are
assigned to IEC 60870-5-103 Class 1 data transactions.

Indications relate to general purpose signals or protection signals (start and trip).
The standard defines two ASDU object types for indications: ASDU 1 and ASDU
2. ASDU 1 type is intended for general purpose objects and ASDU 2 type for
protection objects.

The IEC 60870-5-103 standard was originally defined for protective equipment
only. Therefore the standard does not include circuit breaker control and object
definitions. For circuit breaker and disconnector position information the IEC
60870-5-103 DPI value is extended to include the values 0 and 3 (binary 00 and
11) also. These values represent the four-pole object’s intermediate and erroneous
positions.

3.3.2.1 

ASDU 2 type fault number and relative time data

In addition to the absolute event time stamp, the ASDU 2 type requires that the
message also contains a fault number and relative time data. However, these are
not available in the IEC 61850 data model. Therefore, the IEC 60870-5-103 stack
automatically creates a fault number, which is incremented each time the IED's
internal IEC 61850 data attribute LD0.LEDPTRC1.Str.general is activated.
Relative time is calculated from the time stamp of this same IEC 61850 data
attribute. Relative time is represented as a 16 bit millisecond value which saturates
to its maximum value 65535 ms if necessary.

Section 3

1MRS756710 C

Vendor-specific implementation

14

615 series

Communication Protocol Manual