ProSoft Technology 5201-MNET-101S - Manual (Page 73)

IEC-101 Slave ♦ ProLinx Communication Gateway Reference
IEC 60870-5-101 v3 Slave (Firmware version 3.xx) Protocol Manual
ProSoft Technology, Inc. Page 73 of 159
August 6, 2010
Data Link Configuration
The protocol specification document IEC 60870-5-2 specifies an unambiguous
address (number) must be used for each link. Each address may be unique
within a specific system, or may be unique within a group of links sharing a
common channel. The protocol specification defines that the Data Link Address
may have 0, 1 or 2 octets. The first option should be used only during Balanced
Mode.
Configure the Data Link Address Length parameter to set the number of octets to
be used for the Data Link Address value. It is essential that the Master unit also
uses the same number of octets configured in the 101 Slave. Values shown here
are for example only. Your application may require different settings.

Data Link Address Length: 1
You must also configure the actual Data Link Address value using the following
parameter:

Data link address: 1
This value identifies the gateway’s address in the network.