The protection relay application includes some general-purpose I/O data which is by default mapped to this protocol. See the point list manual for the exact mappings.
The general-purpose objects can be connected to any internal object in the protection relay configuration application using Application Configuration or Signal Matrix. This gives additional opportunities to the protocols.
Example 1
Due to security reasons, protocols do not contain mappings for the direct control of physical outputs. This way, the client cannot accidentally write a change to a physical output.
It is possible to connect general-purpose outputs to physical outputs using Application Configuration. The general-purpose output can also be controlled from the protocol.
Example 2
The legacy protocol default mappings are a selection of the most important signals produced by the IEC 61850-based protection relay applications. The manufacturer’s selection of important signals may not always serve every customer.
Any non-protocol-mapped internal signal can be freely connected to a general-purpose input object via Application Configuration. This object can then be accessed by the legacy protocol as regular protocol application data.
Example 3
The basic IEC 61850 application model of the protection relay produces a great amount of information. In some cases, this is more than what is feasible to transport through a legacy protocol. Via Communication Management in PCM600, unnecessary data objects can be excluded from the legacy protocol.
However, in some cases a better solution is to OR together several internal signals into one general signal. This OR output can be connected to a general-purpose input and accessed by the legacy protocol as regular protocol application data.