Features Of The Ethernet/Ip Unit - Omron CJ1W-EIP21 Operation Manuals

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Features of the EtherNet/IP Unit

 Tag Data Links
Cyclic communications between Controllers or between Controllers and other devices are possible
on an EtherNet/IP network. Tag data links can quickly perform data exchanges for up to 184,832
words of data.
 Message Communications
You can send CIP commands to devices on the EtherNet/IP network when required by execution of
CIP communications instructions in a program. As a result, it is possible to send and receive data
with devices on the EtherNet/IP network.
 BOOTP Client
If the EtherNet/IP Unit is set in the BOOTP settings, the BOOTP client operates when the Controller
power is turned ON, and the IP address is obtained from the BOOTP server. It is possible to set all
of the IP addresses of multiple EtherNet/IP Units at the same time.
 Built-in FTP Server for File Transfers to and from Host Computers
An FTP server is built into the Controller. You can use it to read and write data within the Controller
as files from workstations and computers with FTP clients. The FTP server enables the transfer of
large amounts of data from a client without any additional ladder programming.
 Automatic Controller Clock Adjustment
The clocks built into Controllers connected to Ethernet can be automatically adjusted to the time of
the clock in the SNTP server. If all of the clocks in the system are automatically adjusted to the same
time, time stamps can be used to analyze production histories.
* A separate SNTP server is necessary to automatically adjust the Controller clocks.
 Socket Services
Socket services can be used to send/receive data between general-purpose applications and Con-
trollers. You can use these communications services to send and receive any data to and from
remote nodes, i.e., between host computers and Controllers or between Controllers. You can exe-
cute socket communications instructions in order in a program to execute communications pro-
cesses with the socket services. There are two socket services, the UDP socket service and TCP
socket service.
 Host Names
You can directly specify IP addresses, but you can also use the host names instead of the IP
addresses for SNTP servers, SNMP managers, or the destinations of socket instructions and CIP
communications instructions (DNS client or hosts settings). This is useful, for example, when server
IP addresses change for system revisions because the IP addresses are automatically found when
host names are used.
* A separate DNS server is necessary to use host names with the DNS client.
* The DNS server is specified directly using its IP address.
 Network Management with an SNMP Manager
The SNMP agent passes internal status information from the EtherNet/IP Unit to network manage-
ment software that uses an SNMP manager.
* A separate SNMP manager is necessary for network management.
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
1 Introduction
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