KEYENCE DL-EP1 User Manual
Page 56
- EtherNet/IP Compatible Network Unit DL-EP1 User’s Manual (GT2) -
3-4 Message Communication
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In EtherNet/IP (CIP), the method called "object modeling" is used to
express a device. The device is handled as a group of objects. Objects
abstractly express the configuration elements in the device. A class is a
group of objects expressing the configuration elements of the same
type. An instance actually expresses a specific object contained in a
class. Each instance in the class has the same attribute group, but each
uses a unique attribute value.
To execute a service for the DL-EP1, send a command from the scanner.
The DL-EP1 then returns the service execution results as a response. A
command requires a service, class ID (Class ID), instance ID (Instance
ID), and attribute ID (Attribute ID)
*
. When a parameter is written, the
command also requires a setting (service data).
* Some of the commands to be used may not require the above items.
"Basic Format and Processing Flow of Message Communication"
Reference
Command
Response
Service
Class ID
Instance ID
Attribute ID*
Service data*
General Status
Additional Status*
Service response data*