Omron CJ1W-PNT21, Инструкции по эксплуатации

Страница: 45 / 202

1 Features and System Configuration
1-6
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)

I/O 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 or I/O Supervisors in the network
and will generate alarms if problems occur.
 Device Model
The PROFINET IO application layer describes the modules of an IO Device in a similar way to PRO-
FIBUS-DP. A PROFINET IO Device consists of slots for which the modules and 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.
 Index
The index specifies the data related to a specific subslot to be read or written in an acyclic manner.
The data exchange between IO Controller and the IO Devices is carried out based on the provider/con-
sumer model. The provider sends its data to the consumer without a request. The consumer processes
the data. The provider (as well as the consumer) is either the IO Controller or the IO Device.
The Input Output Provider Status (IOPS) indicates the status of the data source (valid or invalid) for
each of the modules as part of the data exchange message. This can be the Output data for the IO
Controller and the Input data for the IO Device. The provider status is either bad or good, implying the
received data is either invalid or valid for use. For example the Output data of the IO Controller is set to
bad in case the CPU is in Program mode.
The Input Output Consumer Status (IOCR) indicates the feedback on the provided data received
before. This status (Bad or Good) is indicated in the Input data for the IO Controller and the Output data
for the IO Device. As an example when considering the IO Controller Redundancy, an IO Device will
only feedback to the active IO Controller it has consumed its output (status Good). The standby IO Con-
troller will get IOCR Bad status as a response.
The device model is shown in the image below.
1-1-4 Provider/Consumer Model