IEC61850 Server uses TPDU size 255 in the COTP connection confirmation message when connecting client does not provide TPDU size

IEC61850 Server uses TPDU size 255 in the COTP connection confirmation message when connecting client does not provide TPDU size

Summary

The IEC61850 Server I/0 driver in zenon Logic: when a client initiates connection and proposes a TPDU size the Server uses this provided TPDU size. But when the client does not provide the size, the Server responds in COTP connection confirmation with the value 255 (0xFF) of TPDU size. This value is not allowed for the Transport layer.

Description

The IEC61850 Server I/0 driver in zenon Logic: when a client initiates connection and proposes a TPDU size the Server uses this provided TPDU size. But when the client does not provide the size, the Server responds in COTP connection confirmation with the value 255 (0xFF) of TPDU size. This value is not allowed for the Transport layer.

Solution

Now when the connecting client does not provide any TPDU size, the IEC61850 Server uses a valid value; TPDU size is 1024.

Information




Issue Number: 32677
Fixed on Date: 22.9.2014
Versions: 7.11 0 BUILD 15093