Omron PROFINET IO CJ1W-PRM21 Operation Manual page 150

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Number PROFINET
1 IO System
2 IO Controller
3 IO Supervisor
4 Ethernet
5 User Interface
6 IO device
IO Controller
A PROFINET IO Controller is the central device in the PROFINET network. It
has the control over the state of the network and processes the data and
alarms. The IO Controller typically is a PLC Unit that processes the data and
alarms in the user program. It establishes the connection to the devices on the
network during system start-up.
IO Supervisor
A PROFINET IO Supervisor is an optional device in the network, which has
temporary access to the field devices. It is typically an engineering station for
monitoring or commissioning of the system.
IO Device
A PROFINET IO Device is a remotely connected field device, close to the
manufacturing process. It is configured by the IO Controller to cyclically
interchange process data with the IO Controller. The IO Device can have
multiple connections to different IO Controllers / IO Supervisors in the network
and will generate alarms if problems occur with the communication or the
manufacturing process.
Device Model
The PROFINET IO application layer describes the modules of an IO Device in
a similar way as for PROFIBUS DP. A PROFINET IO Device consists of slots
for which the modules/submodules can be inserted. The technical data
concerning the slots and subslots are defined in the GSD file of a device.
Slot
A Slot is the physical place of insertion of a module in an IO Device. Various
subslots are located in the various slots, which contain data for cyclic data
exchange.
Subslot
Subslots provide an additional addressing layer. They enable grouping of
similar channels within a slot. Each slot has to comprise at least one subslot
with [1:n] I/O channels.
PROFIBUS Comment
DP master
system
DP Master Device that addresses the connected IO
units by exchanging input and output
signals with them.
This controller normally runs the
automation program.
PG/PC Class Device (e.g. a PC) for commissioning and
2 DP master diagnostics.
PROFIBUS Network infrastructure.
HMI Device for operating and monitoring the
functions of the system.
DP slave Device for receiving sensor signals and
controlling actuators like valves, switches
and frequency converters.