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 10 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:
IEEE 802.3
IEEE Std 802.1Q
IETF RFC 6890
IEC 61158-6-3
ISO 8601
IETF RFC 5905
IEEE Std 802.1
ISO/IEC 15802-1
IETF RFC 3418
ISO/IEC 9545
EN 61158-6-3
IEC 61158-5-3
IETF RFC 2365
IETF RFC 2132
IEEE 802.1Q
IETF RFC 1034
EN 61800-7-203:2016
IEC 61158-1:2019
IEC 61158-6-10:2019
ISO/IEC/IEEE 60559:2011
EN IEC 61158-1:2019
IEC 61800-7-203:2015
IETF RFC 792
IEEE Std 802.3
EN 61158-6-10:2019
IEEE 802.1
IETF RFC 3490
EN 61158-5-3
IEEE Std 802.1AB
IETF RFC 894
IETF RFC 791
ISO/IEC 9834-8
IEEE 802
IETF RFC 826
IEEE 802.1AS
ISO/IEC 7498-1
IETF RFC 1213
IETF RFC 2737
IETF RFC 3621
ISO/IEC 8822
ISO/IEC 8824-1
ISO/IEC 10646
EN 62439-2
IETF RFC 768
IETF RFC 4836
Open Group Publication C706 DCE1.1
IEEE Std 802
IEC 62439-2
IETF RFC 2674
IETF RFC 1112
IEEE Std 802.1AS
ISO/IEC 646
IETF RFC 2863
IEEE 802.1AB
IETF RFC 2131
IETF RFC 1157
ISO/IEC 10731
IEC 61784-1
EN 61375-2-1
EN 61784-2
ISO/IEC 8825-1
EN 61131-1
ISO/IEC 8859-1
IEC 61131-3
IEC 61784-2
IEC 61131-1
EN 60870-5-4
ISO/IEC 8877
IEC 60870-5-4
IEC 61375-2-1
EN 61131-3
EN 61784-1


Replaces BS EN 61158-5-10:2014 which remains current

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