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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