
32-1
32.1 Introduction
e Probus (PROcess FIeld BUS) was dened by a consortium of dierent manufacturers and research
institutions
in
Germany
more
than
20
years
ago
and
dened
from
the
beginning
as
an
open
national
standard
DIN
19245.
It
is
a
simple
eldbus
based
on
an
extended
token
passing
and
object-oriented
services
to
provide
distributed
control
based
on
a
simplied
and
adapted
version
of
ISO
69506
manufac-
turing
message
specication
(MMS)
called
the
eldbus
message
specication
(FMS).
But
the
industry
did
not
want
a
distributed
system
and
adopted
a
simple
remote
I/O
system
with
centralized
control.
So
the
Probus-FMS
was
extended
wit ...