Rockwell Automation 1336-GM6 Enhanced DeviceNet Communications Module - Manual (Page 114)

C-6 DeviceNet Objects
Class Code 0x05 — Connection The Connection Class allocates and manages the internal resources
associated with both I/O and Explicit Messaging Connections. The
specific instance generated by the Connection Class is referred to as a
Connection Instance or a Connection Object.
Important: An externally visible interface to the Connection Class
across Explicit Messaging Connections DOES exist. Unless
otherwise noted, all services/attributes noted in the following sections
are accessible using Explicit Messaging.
A Connection Object within a particular module actually represents
one of the end-points of a Connection. It is possible for one of the
Connection end-points to be configured and “active” (e.g.,
transmitting) without the other end-point(s) being present.
Connection Objects are used to model the communication specific
characteristics of a particular Application-to-Applications(s)
relationship. A specific Connection Object Instance manages the
communication-specific aspects related to an end-point.
A Connection Object on DeviceNet uses the services provided by a
Link Producer and/or Link Consumer to perform low-level data
transmission and reception functions.
Class Attributes
Instances
Attribute ID Access Rule Name Data Type Description
1 Get Revision UINT Revision of the Connection Object class definition
upon which the implementation is based
Range 1 – 65535
Instance Description
1 Group 2 Messaging
2 Group 2 Polling
4 Group 2 COS/Cyclic
6 Group 3 Messaging
7 Group 3 Messaging
8 Group 3 Messaging
9 Group 3 Messaging
10 Group 3 Messaging