Omron CJ1W-PNT21, Инструкции по эксплуатации

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1 Features and System Configuration
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
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Unit Control and Status
In total, 25 control and status words are exchanged between the PROFINET IO Controller Unit and
the CPU Unit. The internal CPU memory location is related to the Unit Number of the PROFINET IO
Controller Unit. The words provide status and diagnostics information of the IO Controller Unit, the
PROFINET IO network and PROFINET IO Devices.
 Large I/O Data Exchange
The PROFINET IO Controller initiates and maintains cyclic I/O data exchange with its assigned IO
Devices. In addition to the I/O data exchange, parameter data and status information in a PROFI-
NET IO Device can be accessed via the PROFINET IO Controller Unit by acyclic messaging (see
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3 Acyclic Messages ).
The maximum size of the I/O data exchanged between the CJ1W-PNT21 and the CPU is 7168
words. The I/O data can be distributed over two input areas and two output areas. Each of the input
and output areas can be mapped to any location in the DM Area, CIO Area, WR Area, HR Area, or
the EM banks.
 Troubleshooting Functions
The PROFINET IO Controller Unit provides a variety of troubleshooting functions for prompt recov-
ery in case of errors:
• Extensive self-diagnostic functions at startup.
• Data exchange Device Variable flags indicating whether I/O data is being exchanged with the
IO Devices.
• Alarm Device Variable flags indicating if new IO Device Alarm data is available.

Real-Time (RT) Communication
To facilitate Real-Time capabilities for data exchange, the PROFINET uses a specific protocol of
Real-Time (RT) Communication. This protocol cancels some of the flow control and addressing in
comparison with the TCP/IP and UDP/IP.
For the prioritized transmission of RT-frames, Real-Time communication uses the VLAN tag as
defined in IEEE 802.1Q.
 IO Controller Redundancy
To ensure a highly reliable implementation of the application, the PROFINET IO Controller Unit and
all PROFINET IO Devices offer the possibility of CPU controller redundancy. To facilitate redun-
dancy, two IO Controllers (one active and one standby) in a networked connection CX-Configura-
torFDT of IO Devices, ensures a fast change from active to standby CPU IO Controller in case of a
single device or network malfunction.
PROFINET uses Ethernet and TCP/UDP protocols as a basis for the communication between devices.
 TCP/IP and UDP/IP
For non-time critical messaging PROFINET uses standard Ethernet mechanisms over TCP/IP and
UDP/IP.
Field devices are addressed using a MAC and IP address. This is similar to the standard Ethernet
communication. In these protocols, the networks are identified based on the IP address. Within a
single network the MAC address is used for the addressing of the target devices.
This addressing features enables integration with the IT world without limitation. The OMRON IO
Devices can accordingly support the OMRON Ethernet protocols, enabling additional communica-
tion with OMRON PROFINET devices.
1-1-2 PROFINET Communication