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 12 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 802.1D
ISO/IEC 9545
ISO/IEC 7498-3
ISO/IEC 10646
ISO/IEC/IEEE 60559
ISO/IEC 7498-1
ISO/IEC/IEEE 8802-3
IETF RFC 791
ISO/IEC 646:1991
IEC 61131-3
IEEE Std 802.1D
ISO/IEC 10731
IEC 61158-1:2019
IEC 61158-3-12:2019
BS ISO/IEC 646:1991
EN 50325-4
IEEE Std 802.1Q
IEC 61784-2
IEC 61158-4-12
IEC 61158-6-12
IEC 61784-1
IEC 61158-2


Replaces BS EN 61158-5-12:2014 which remains current

All current amendments available at time of purchase are included with the purchase of this document.

Product Details

Published: 07/09/2019 ISBN(s): 9780539048391 Number of Pages: 122 File Size: 1 file , 1.8 MB Product Code(s): 30395526, 30395526, 30395526 Note: This product is unavailable in United Kingdom