Cip Message Structure For Accessing Cip Objects - Omron NX Series User Manual

10 CIP Message Communications
Precautions for Correct Use
• To allow the NX-series EtherNet/IP Unit to receive CIP messages, select the Use Option for
the CIP message server of the EtherNet/IP port. If the Do not use Option for the CIP mes-
sage server is selected, the Unit cannot receive CIP messages. For the details on the set-
tings, refer to CIP Message Server on page 7-15.
• If the Use Option is selected for Packet Filter of the EtherNet/IP port, make sure to permit
packets to be used for CIP messages. If they are not permitted, the CIP message cannot be
received. For the details on the settings, refer to Packet Filter on page 7-7.
• If the Do not use, Option for the CIP message server is selected, EtherNet/IP communica-
tions cannot be used. This causes the following restrictions on the functionality of connection
tools and Controllers.
Category
Tools
Controller
features
*1. The tag monitoring function of CX-Compolet and the tag monitoring function of the EtherNet/IP
Monitor Tool included with the SYSMAC Gateway do not allow the NX-series EtherNet/IP Unit to
be specified as a connected device.
• NX-series EtherNet/IP Units do not have the server function of CIP message communications
to read and write variables. However, they can use CIP routing to read/write variables from/to
the NX-series EtherNet/IP Unit. Refer to the NJ/NX-series CPU Unit Built-in EtherNet/IP Port
User's Manual (Cat. No. W506) for details on the CIP routing function of the CPU Unit.
Additional Information
• Selecting the Do not use Option for the CIP message server closes the TCP/UDP ports used
for EtherNet/IP communications. This improves security of communications over the network.
• Even if the Do not use Option for the CIP message server is selected, the TCP/UDP mes-
sage services can be used. You can also use the client function (CIP communications instruc-
tions) of CIP message communications.
10-3-1

CIP Message Structure for Accessing CIP Objects

This section shows how to specify messages to access CIP objects.
The CIP objects to be accessed are expressed by connecting the segments
defined in the CIP Common Specifications in the request path field in a CIP explicit message.
Example: Performing the Reset service (0x05) to the Instance (01 hex) of the Identity object (class: 01
hex)
10-24
•
Tag data link setting using Sysmac Studio is not possible.
•
CX-Compolet and SYSMAC Gateway cannot be connected.
•
Network Configurator cannot be connected. Or, devices cannot be displayed.
•
The tag data link function cannot be used.
•
CIP Safety communications cannot be used.
•
The server function of CIP messages (UCMM, Class3) in the EtherNet/IP port cannot
be used.
Restrictions
*1
NX-series EtherNet/IP Unit User's Manual (W627)