Full Description 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.\" This part of IEC 61158 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 26 fieldbus. The term \"time-critical\" is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.
Cross References:
IETF RFC 922
ISO/IEC 7498-1
ISO/IEC 8822
IEC 61158-6-26:2019
ISO/IEC 10731
IETF RFC 919
ISO/IEC 60559
ISO/IEC/IEEE 8802-3
IETF RFC 768
ISO/IEC 646
ISO/IEC 9545
ISO/IEC 8824-1
IETF RFC 796
IETF RFC 793
IETF RFC 792
IETF RFC 791
IEC 61131-3
IETF RFC 950
IETF RFC 826
IETF RFC 894
ISO/IEC 10646
BS EN IEC 61158-1:2019
IEC 61784-2:2019
IEC 61158-1:2019
BS EN IEC 61784-2:2019
JIS B 3521:2004
JEM 1479:2012
JEM-TR 213:2011
JEM-TR 214:2000
JEM 1480:2012
All current amendments available at time of purchase are included with the purchase of this document.
BS EN IEC 61158-5-26:2019 history
1970BS EN IEC 61158-5-26:2023 Industrial communication networks. Fieldbus specifications Application layer service definition. Type 26 elements (British Standard)
2019BS EN IEC 61158-5-26:2019 Industrial communication networks. Fieldbus specifications-Application layer service definition. Type 26 elements