WAGO-I/O-SYSTEM 750
Fieldbus Communication 133
750-375 PROFINET IO advanced Fieldbus Coupler
Manual
Version 1.1.0
Figure 59: PROFINET principle
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(1) Use of the IO supervisor is initially only needed temporarily at the
beginning of the configuration of the PROFINET I/O controller. The IO
supervisor (e.g. an engineering station) is typically a programming device
(PD), personal computer (PC) or Human Machine Interface (HMI) device
for commissioning or diagnostics.
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(2) The IO controller is used to configure IO devices and to exchange
process data and alarms with the IO devices. The IO controller is part of a
higher-level controller (PLC) in the PROFINET network in which the
automation program is running (compared with PROFIBUS that would be
the functionality of a class 1 master). The IO device is a remote IO device
coupled via PROFINET IO (compared with PROFIBUS, this corresponds to
the function of a slave). In a PROFINET network, there is at least one IO
controller and one or more IO devices.
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(3) The IO supervisor can carry out individual parameterization (iPar) of
specific modules on the IO devices (e.g. safety by means of WAGO SEDI)
directly. It can also take over status and control tasks for the IO devices and
be used for diagnostics of IO devices in the network.
11.2.4
Addressing
The physical MAC address of a device is used to uniquely address a PROFINET
IO field device (IO device) within a network. In addition, each switch port in a
field device is identified by a separate port MAC address, so that a 2-port field
device has a total of 3 MAC addresses.
The additional MAC addresses of the ports are only used in conjunction with
LLDP for topology determination.
