ProSoft Technology MVI56-104S - Manual (Page 102)

MVI56-104S ♦ ControlLogix Platform Reference
IEC 60870-5-104 Server Communication Module User Manual
Page 102 of 188
ProSoft Technology, Inc.
November 18, 2009
If the Use IP List parameter is set to Yes, the module will only accept a
connection from one of the three IP addresses listed in the example above. The
following illustration shows that the Server will accept a connection from Client A,
whose address is on the list, but will reject a connection from Client B, whose
address is not on the list.
Monitor Direction and Control Direction: Point Definition
The protocol specification defines two directions of data: monitor direction and
control direction.
Monitor Direction: The direction of transmission from the server to the client
Control Direction: The direction of transmission from the client to the server
The points that are typically transferred from the server to the client are also
known as Monitor Points (or Monitor Information Objects). The points that are
typically transferred from the client to the server are also known as Control
Points (or Command Information Objects).