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4.4. Connection Manager Object (0x06)
Class code 0x06.
Use this object for connection and connectionless communications, including establishing
connections across multiple subnets.
Class Attributes
Instance Attribute ID Access Name Data type Details Value
1 Get Revision UINT Revision of this object 1
2 Get Max Instances UINT Maximum instance number of an
object currently created in this class
level of the device.
1
3 Get Number of Instances UINT Number of object instances currently
created at this class level of the
device.
1
Optional attribute list STRUCT
of
List of optional instance attributes
utilized in an object class
implementation.
-
Number of attributes UNIT Number of attribute in the optional
attribute list.
8
4 Get
Optional attributes ARRAY of
UNIT
List of optional attribute numbers. 1, 2, 3,
4, 5, 6,
7, 8
6 Get Max ID of class
attributes
UINT The attribute ID number of the last
class attribute of the class definition
implemented in the device.
7
0
7 Get Max ID of instance
attribute
UINT The attribute ID number of the last
instance attribute of the class
definition implemented in the device.
8
Class Services
Service Code Service Name Description of Service
0x0E Get_Attribute_Single Read one attribute
Instance 1 Attribute
Instance Attribute ID Access Name Data type Details
1 Get Open Requests UINT Number of Forward Open service requests
received.
2 Get Open Format Rejects UINT Number of Forward Open service requests
which were rejected due to bad format.
3 Get Open Resources Rejects UINT Number of Forward Open service requests
which were rejected due to lack of resources.
4 Get Open Other Rejects UINT Number of Forward Open service requests
which were rejected for reasons other than
bad format or lack of resources.
5 Get Close Requests UINT Number of Forward Close service requests
received.
6 Get Close Format Requests UINT Number of Forward Close service requests
which were rejected due to bad format.
7 Get Close Other Requests UINT Number of Forward Close service requests
which were rejected for reasons other than
bad format.
1
8 Get Connection Timeouts UINT Total number of connection timeouts that have
occurred in connections controlled by this
Connection Manager
Instance Services
Service Code Service Name Description of Service
0x0E Get_Attribute_Single Read one attribute
0x4E Forward_Close Closes a connection
0x54 Forward_Open Opens a connection, maximum data size is 511 bytes