
Industrial communication networks – Fieldbus specifications Part 5-19: Application layer service definition – Type 19 elements
出版:Osterreichisches Normungsinstitut/Austrian Standards

專家解讀視頻
1.1 General The fieldbus application layer (FAL) provides user programs with a means to access the fieldbus communication environment. In this respect, the FAL can be viewed as a “window between corresponding application programs.”