
Industrial communication networks. Fieldbus specifications. Application layer service definition. Type 21 elements
出版:British Standards Institution

專家解讀視頻
Describes the common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment as well as material specific to the Type 21 protocol.
? British Standards Institution 2013
EN 61158-5-21 : 2012 - Identical
IEC 61158-5-21 : 1.0 - Identical
IEC 61158-5-21 Ed. 1.0 - Identical