Omron SYSMAC CJ1W-EIP21, Operation Manuals

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1 Introduction
1-4
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
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Complete Troubleshooting Functions
A variety of functions are provided to quickly identify and handle errors.
• Self-diagnosis at startup
• Event log that records the time of occurrence and other error details
Additional Information
CIP (Common Industrial Protocol)
CIP is a shared industrial protocol for the OSI application layer. The CIP is used in networks such
as EtherNet/IP, CompoNet, and DeviceNet. Data can be routed easily between networks that are
based on the CIP. You can therefore easily configure a transparent network from the field device
level to the host level. The CIP has the following advantages.
• Destination nodes are specified by a relative path, without fixed routing tables.
• The CIP uses the producer/consumer model. Nodes in the network are arranged on the same
level and it is possible to communicate with required devices whenever it is necessary. The
consumer node will receive data sent from a producer node when the connection ID in the
packet indicates that the node requires the data. Because the producer can send the same
data with the same characteristics in a multicast format, the time required for the transfer is
fixed and not dependent on the number of consumer nodes. (Either multicast or unicast can be
selected.)