Explicit Message Diagnostic List Object

Description

The Explicit Messages Diagnostic List Object provides diagnostic information about all the explicit messages to the EtherNet/IP stack. The class id can be changed with the definition OBJ_CLASS_DIAG_EM_LIST.

Class Code

The Explicit Connection Diagnostic List Object class code is 0x304.

Class Attributes

Attribute ID	Name	Access	Description
0x01	Revision	R	The Explicit Connection Diagnostic List Object implementation revision. Returns 0x01.
0x02	Maximum Instance	R	Returns the maximum instance number created that varies from 0 to N (N = maximum number of concurrent list access supported = 2).
0x03	Number of Instance	R	Returns the number of instances created that varies from 0 to N (N = maximum number of concurrent list access supported = 2).

Attribute ID

Name

Access

Description

0x01

Revision

The Explicit Connection Diagnostic List Object implementation revision.

Returns 0x01.

0x02

Maximum Instance

Returns the maximum instance number created that varies from 0 to N (N = maximum number of concurrent list access supported = 2).

0x03

Number of Instance

Returns the number of instances created that varies from 0 to N (N = maximum number of concurrent list access supported = 2).

Instance Codes

The number of instances created varies from 0 to N, where N is the maximum number of concurrent list access supported, which are 2.

Instance Services

Service Code	Name	Description
0x01	Get Attribute All	Returns the value of all class attributes.
0x0E	Get Attribute Single	Returns the value of the specified attribute.
0x08	Create*	This service creates an instance of the Explicit Connections Diagnostic List object.
0x09	Delete*	This service deletes an instance of the Explicit Connections Diagnostic List object.
0x4B	Explicit Connections Diagnostic Read	This service reads the explicit connections diagnostics data from the list. For more information, refer to next section.

Explicit Connections Diagnostic Read

Request

ID	Description	Type	Value
0000	Explicit message diagnostic index	UINT	To read the index of the next explicit message diagnostic (first index value is 0).
0002	To read the number of explicit message diagnostic	UINT	Number of explicit message diagnostic that the requester wants to read. =0: Requester has not specify a value. In this case, the service will provide the maximum possible value in accordance with the response maximum size. <>0: Requester specifies the number of explicit message diagnostic to be returned

Description

Type

Value

0000

Explicit message diagnostic index

UINT

To read the index of the next explicit message diagnostic (first index value is 0).

0002

To read the number of explicit message diagnostic

UINT

Number of explicit message diagnostic that the requester wants to read.

=0: Requester has not specify a value. In this case, the service will provide the maximum possible value in accordance with the response maximum size.
<>0: Requester specifies the number of explicit message diagnostic to be returned

Response

ID	Description	Type	Value
0000	Number of explicit message diagnostic	UINT	Number of explicit message diagnostic in the response
0002+X	Explicit messaging connection diagnostic list	ARRAY of STRUCT	–
	Explicit message diagnostic index	UINT	Index in accordance to the object instance 0x303
	isUsed	UINT	Explicit message used
	wType	UINT	Client (1) or Server (2)
	bConnected	UINT	Connected (1) or UCMM (0)
	Originator connection id	UDINT	O to T connection ID
	Originator IP	UDINT	–
	Originator TCP port	UINT	–
	Target connection id	UDINT	T to O connection ID
	Target IP	UDINT	–
	Target TCP port	UINT	–
	Msg send counter	UDINT	Increments each time a class 3 CIP message is sent to the connection
	Msg receeive counter	UDINT	Increments each time a class 3 CIP message is received from the connection

Status

General Status	Extended Status	Status Name	Description
0x00	0000	Success	No explicit message diagnostic to read.
	8000	Success with bad integrity	No explicit message diagnostic to read, however the set of explicit message diagnostic has changed since the instance was created. The client must delete the instance and create a new one.
	0001	Success	Mode explicit message diagnostic to read.
	8001	Success with bad integrity	Mode explicit message diagnostic to read, however the set of explicit message diagnostic has changed since the instance was created. The client must delete the instance and create a new one.