Profinet - Honeywell Krom Schroder BCU 580 Technical Information

Profinet

7 Profinet
Profinet is a manufacturer-independent, open standard
for industrial Ethernet. It covers the requirements for
automation technology (manufacturing automation,
process automation, drive applications with or without
functional safety).
Profinet is a bus variant for fieldbus communication,
optimized for speed and low connection costs.
FCU
HT
PLC
BCM BCM
1
2
The basic function of Profinet is the exchange of
process and required data between an IO controller
(e.g. PLC) and several distributed IO devices (e.g. BCU/
FCU).
The signals from the IO devices are read into the IO con-
troller cyclically. There, they are processed and are then
output to the IO devices again.
In addition to cyclic data exchange, Profinet also pro-
vides acyclic data exchange for events which are not
BCU 580 · Edition 11.15l
P
BUS
PROFINET
BCM
1
2 2
constantly repeated such as sending parameter set-
tings and configuration data when the IO devices start
up or sending a diagnostic message from the IO device
to the IO controller during operation. The data read or
written acyclically by read/write services are specified
by an index, see page 48 (Indexes for acyclic com-
munication).
The technical properties of an IO device are described
by the manufacturer in a device master data file
(GSD file). The GSD file contains the device image, the
communications properties and all fault messages
from the IO device in text form which are important for
the configuration of the Profinet network and the data
exchange. The configuration is completed using an en-
gineering tool which is supplied by the manufacturer of
the IO controller. Modules defined in the GSD file may
be selected for configuration to include them in the
system, see also page 41 (GSD file for PLC configu-
1
ration).
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