You will need the following documents:
R6509 -- K-BUS Interface Guide
R6510 -- IEC870 Interface Guide
R6511 -- Courier Protocol
R6512 -- Courier User Guide
R6513 -- Courier Menu Style Guide
They are available from:
Courier Communications
GEC Alsthom T & D Protection and Control Ltd
St Leonards Works,
Stafford ST17 4LX
United Kingdom
Tel: 0785 223251
Fax: 0785 212232
Regards
Philip Wong
ioserver@ioserver.com
http://www.ioserver.com/