User Manual
Arctic Substation Gateway
Firmware Version 2.4.x
37
Document Version 1
Network protocol on IEC-104 communication
Units
N/A
Value range
UDP, TCP
Note
The IEC-104 standard specifies only TCP protocol.
Network port to listen
Table 25: TCP or UDP port to listen for incoming IEC-104 connections
TCP or UDP port to listen for incoming IEC-104 connections
Type
Network port
Units
Port number
Value range
0 - 65000
Note
The IEC-104 standard specifies TCP port 2404.
Network idle timeout
It defines the idle timeout of the network connection in seconds. If there is
no network data received during the specified interval, the connection is
closed by Arctic. This parameter is required in order to detect partially closed
connections and release the resources for new connections especially if
the”New connection priority” parameter is disabled. Value 0 disables the
network idle timeout detection.
Table 26: Network idle timeout for IEC-104 connections
Network idle timeout for IEC-104 connections
Type
Timeout
Units
Seconds
Value range
0 – 65000
Note
The network idle timeout must be longer than IEC-104 link test
interval (t3).
New connection priority
It defines the action when a new connection request arrives while a
connection is already active. If the set value is”No”, the new connection is
rejected. If the set value is”Yes”, the present connection is terminated and the
new connection is accepted.
Table 27: New connection priority for IEC-104 connections
New connection priority for IEC-104 connections
Type
Boolean
Units
N/A
Value range
No, Yes
Note
It is recommendable to set this value to “Yes” in normal
configurations having only one IEC-104 master.
