Section 3 Vendor-Specific Implementation; Dnp3 Link Modes; Dnp3 Data Objects; Dnp3 Serial Link Mode - ABB 620 Series Manual

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1MAC459571-IB C

Section 3

3.1

3.1.1

3.1.2

620 series ANSI

Communication Protocol Manual

Vendor-specific implementation

Serial and TCP/IP modes are available. They are mutually exclusive.

The DNP3 protocol in 620 series IEDs is built on top of the internal IEC 61850 data model.

Thus, the DNP3 application data objects and Class events are derived from IEC 61850

data objects and data set reporting. The 620 series IEDs have a predefined IEC 61850 data

set configuration. In other words, it is predefined which internal data object changes the

620 series IEDs detect.

The available DNP3 data objects in the 620 series IEDs are selected from the objects

predefined in the IEC 61850 data sets. IEC 61850 data set reporting and DNP3 Class event

reporting are basically identical.

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

DNP3 serial can be assigned to a serial communication port in the IED. Serial

communication ports are named COM1...COMn, depending on how many serial ports the

620 series IED hosts.

If this protocol does not operate as expected, check that other serial

protocols are not using the COM port also.

DNP3 protocol ignores any parity setting in the COM settings group;

DNP3 is defined as an 8 bit/no parity protocol with a 16-bit CRC every 16

bytes. This provides better error detection than parity.

Vendor-specific implementation

Section 3

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