WorldFIP is a fieldbus network protocol designed to provide links
between level zero (sensors/actuators) and level one (PLCs, controllers,
etc.) in automation systems.
WorldFIP usage at CERN
At CERN over 450km of WorldFIP cables is installed, serving a total of
about 12000 nodes. All of this is required for the lifetime of the LHC
operation timescale of 15-20 years.
WorldFIP is used in eight principle systems of the CERN accelerator
These documents show that the WorldFIP protocol is part of European
fieldbus standard EN50170. However, it turns out that the standards
series EN 50170 has been replaced by the 61158 series ("Industrial
communication networks. Fieldbus specifications"), in particular:
61158-1: overview and guidance to 61158 and 61784 series
61158-2: the physical layer (2007)
61158-3-7 and 4-7: the data-link layer (2007)
61158-5-7 and 6-7: the application layer (2007)
IEC 61784-1 Ed 2.0 (2007-12): Industrial communication networks .
Profiles. Part 1: Fieldbus profiles
IEC 61918 Ed 1.0 (2007-12): Industrial communication networks.
Installation of communication networks in industrial premises.
These 8 standards are included in a CD-ROM IEC FIELDB-CPF-5 Ed. 1.0
Industrial communication networks - Fieldbus - Communication Profile
Family 5: WorldFIP.
The European fieldbus standard
is available from the CERN document server (CERN intranet only. Thanks
to Tullio Basaglia of the CERN Scientific Information Service).
The detailed contents of the so-called MPS variables is not defined in
any of the above standards. I have not been able to find any other
description than in the MICROFIP HANDLER Software Version 4 User
126.96.36.199 A definition of Promptness, Refreshment and a bit
that's not in the IEC specifications called Significance
(meaning: the variable has been written at least once) is given.
188.8.131.52 Format of Variables produced on network (but this is for
so-called dynamic variables, but the STATUS byte is the same
(bit 0=refreshment, bit 2=significance, other bits may be
1.5 Detailed description of the variables Report, List of
equipment present, Presence, Identification, Time and others.
However, the Identification variable described has not the same
PDU type and format as described in the MicroFIP manual.
9 Medium dependent sublayer (MDS) (page 120-123, defines coding,
preamble, start/end of frame delimiters). Strangely enough Table
257 of IEC-61784 specifically states that this clause is not
included in the profile 5/1 WorldFIP, but it corresponds to "The
WorldFIP protocol" brief).
11.6 Jabber inhibit - describes the MAU should self-inhibit in
case of too long transmissions (and reset after 0.5 to 3
seconds. If implemented in FielDrive, it may mean that it can
inhibit itself if this logic is sensitive to radiation.