Connection Manager Object

Overview

The Connection Manager CIP object consists of the attributes and services described below.

Attributes

The Connection Manager CIP object consists of the following attributes:

1. Class attributes:

ID (hex)	Description	GET	SET
01	Revision	X	—
02	Max Instance	X	—
X = supported — = not supported

2. Instance attributes:

ID (hex)	Description	Type	GET	SET	Value
01	Open Requests	UINT	X	X	Number of Forward Open service requests received
02	Open Format Rejects	UINT	X	X	Number of Forward Open service requests that were rejected due to bad format
03	Open Resource Rejects	UINT	X	X	Number of Forward Open service requests that were rejected due to lack of resources
04	Open Other Rejects	UINT	X	X	Number of Forward Open service requests that were rejected for reasons other than bad format or lack of resources
05	Close Requests	UINT	X	X	Number of Forward Close service requests received
06	Close Format Requests	UINT	X	X	Number of Forward Close service requests that were rejected due to bad format
07	Close Other Requests	UINT	X	X	Number of Forward Close service requests that were rejected for reasons other than bad format
08	Connection Timeouts	UINT	X	X	Total number of connection timeouts that occurred in connections controlled by this connections manager
09	Connection Entry List	STRUCT	X	—	List of connections—always 0
11	CPU_Utilization	UINT	X	—	CPU Utilization in tenths of a percent—always 0
12	MaxBuffSize	UDINT	X	—	Amount of buffer space originally available—always 0
13	BufSize Remaining	UDINT	X	—	Amount of buffer space now available—always 0
X = supported — = not supported

Services

The CIP Connection Manager object performs the following services upon the listed object types:

ID (hex)	Description	Class	Instance	Notes
01	Get_Attributes_All	X	X	—
0E	Get_Attributes_Single	X	X	—
4E	Forward Close	—	X	Managed internally by the EtherNet/IP stack—no link to CPU exists
52	Unconnected Send	—	X
54	Forward Open	—	X
X = supported — = not supported