Ethernet/IP Adapter

Introduction

This section describes the configuration of the TM3 Ethernet bus coupler as an Ethernet/IP adapter.

For further information about Ethernet/IP, refer to the www.odva.org website.

Ethernet/IP Adapter Configuration

To configure your TM3 Ethernet bus coupler as an EtherNet/IP adapter, add the bus coupler to your project and select EtherNet IP Scanner > TM3BCEIP.

EtherNet/IP Parameters Configuration

To configure the Ethernet/IP parameters, double-click the bus coupler node in the Devices tree.

In the Target Settings tab, you can configure the following parameters:

Element	Description
Address Settings
IP Address by DHCP	IP address is obtained via DHCP.
IP Address by DHCP	Device name used to retrieve IP address through DHCP, maximum 15 characters.
IP Address by BOOTP	MAC address of the bus coupler.
Fixed IP Address	IP address of the bus coupler.
Electronic Keying
Check Device Type	Type of the bus coupler.
Check Vendor Type	Vendor code of the bus coupler.
Check Product Type	Product code of the bus coupler.
Check Major Revision	Firmware major version.
Check Minor Revision	Firmware minor version.
Protocol on the fieldbus
Protocol used by the device	Protocol used. You cannot edit this field.

Electronic Keying signatures are used to identify the bus coupler.

Electronic Keying is information contained in the firmware of the bus coupler (Vendor Code, Product Code, …).

When the controller scanner starts, it compares each selected electronic keying value with the corresponding information in the TM3 Ethernet bus coupler.

If the TM3 Ethernet bus coupler values are not the same as the application values, the controller no longer communicates with the TM3 Ethernet bus coupler.

Connections on Ethernet/IP Adapter

To access a target device, an Originator opens a connection which can include several sessions that send requests.

One explicit connection uses one session (a session is a TCP or UDP connection).

One I/O connection uses one session.

The following table shows the Ethernet/IP connections limitations:

Characteristic	Maximum
Explicit connections	16 (Class 3)
I/O connections	1 (Class 1) Exclusive Owner 15 (Class 1) Listen Only
Sessions	16

Characteristic

Maximum

Explicit connections

16 (Class 3)

I/O connections

1 (Class 1) Exclusive Owner

15 (Class 1) Listen Only

Sessions

NOTE: The TM3 bus coupler supports cyclic connections. If an Originator opens a connection using a change of state as a trigger, packets are sent at the RPI rate.

EtherNet/IP I/O Mapping Tab

When the data exchanges are configured, you can map variables to be used by the program.

Defined variables are listed in the EtherNet/IP I/O Mapping tab.

For more information on this tab, refer to I/O Mapping Dialog.

Bus Cycle Options

Select the Bus cycle task to synchronize the EtherNet/IP adapter data:

oUse parent bus cycle setting (the default),

oMAST

oAny task of the application

NOTE: This parameter defines the task responsible for copying the %IW and %QW registers from/to the bus coupler.

EtherNet/IP Objects

The TM3 bus coupler supports the following objects:

Object class	Class ID (hex)	Effect on Interface Behavior
TM3 bus coupler configuration object	65	Stores TM2/TM3 module configurations.
TM3 bus coupler feature configuration object	64	Used to prepare/apply configuration.

Profile

The controller supports the following objects:

Object class	Class ID (hex)	Cat.	Number of Instances	Effect on Interface Behavior
Identity Object	01	1	1	Supports the reset service
Message Router Object	02	1	1	Explicit message connection
Assembly Object	04	2	2	Defines I/O data format
Connection Manager Object	06		1	–
TCP/IP Interface Object	F5	1	1	TCP/IP configuration
Ethernet Link Object	F6	1	1	Counter and status information
Interface Diagnostic Object	350	1	1	–
Connection Diagnostic Object	352	1	1	–
Explicit Connection Diagnostic Object	353	1	1	–
TM3 Bus Coupler Feature Configuration Object	64	1	2	–

Identity Object (Class ID = 01 hex)

The following table describes the class attributes of the Identity Object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	01	Implementation revision of the Identity Object
2	Get	Max Instances	UINT	01	The largest instance number
3	Get	Number of Instances	UINT	01	The number of object instances
6	Get	Max Class Attribute	UINT	07	The largest class attributes value
7	Get	Max Instance Attribute	UINT	07	The largest instance attributes value

The following table describes the Class Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all class attributes
0E	Get Attribute Single	Returns the value of the specified attribute

The following table describes the Instance Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all class attributes
05	Reset ⁽¹⁾	Initializes EtherNet/IP component (controller reboot)
0E	Get Attribute Single	Returns the value of the specified attribute

⁽¹⁾ Reset Service description:

When the Identity Object receives a Reset request, it:

odetermines whether it can provide the type of reset requested

oresponds to the request

oattempts to perform the type of reset requested

The Reset common service has one specific parameter, Type of Reset (USINT), with the following values:

Value	Type of Reset
0	Reboots the controller NOTE: This is the default value if this parameter is omitted.
1	Not supported
2	Not supported
3...99	Reserved
100...199	Vendor specific
200...255	Reserved

The following table describes the Instance attributes:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Vendor ID	UINT	F3	Schneider Automation ID
2	Get	Device type	UINT	0C	EIP Adapter
3	Get	Product code	UINT	1009	Bus coupler product code
4	Get	Revision	Struct of USINT, USINT	–	Product revision number of the bus coupler ⁽¹⁾. Equivalent to the 2 low bytes of the bus coupler version
5	Get	Status	WORD	–	Status word⁽²⁾
6	Get	Serial number	UDINT	–	Serial number of the bus coupler
7	Get	Product name	Struct of USINT, STRING	TM3BCEIP	–

⁽¹⁾ Mapped in a WORD:

oMSB: minor revision (second USINT)

oLSB: major revision (first USINT)

Example: 0205 hex means revision V5.2.

⁽²⁾ Status word (Attribute 5):

Bit	Name	Description
0	Owned	TRUE indicates that the device is a owner.
1	Reserved	–
2	Configured	TRUE indicates that the device application has been configured.
3	Reserved	–
4...7	Extended Device Status	o0: Self-testing or undetermined o1: Firmware update in progress
8	Minor Recoverable Fault	TRUE indicates that the device detected an error, which, under most circumstances, is recoverable. This type of event does not lead to a change in the device state.
9	Minor Unrecoverable Fault	TRUE indicates that the device detected an error, which, under most circumstances, is unrecoverable. This type of event does not lead to a change in the device state.
10	Major Recoverable Fault	TRUE indicates the device detected an error, which requires the device to report an exception and enter into the HALT state. This type of event leads to a change in the device state, but, under most circumstances, is recoverable.
11	Major Unrecoverable Fault	TRUE indicates the device detected an error, which requires the device to report an exception and enter into the HALT state. This type of event leads to a change in the device state, but, under most circumstances, is not recoverable.
12...15	Reserved	–

Message Router Object (Class ID = 02 hex)

The following table describes the class attributes of the Message Router object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	01	Implementation revision number of the Message Router Object
2	Get	Max Instances	UINT	01	The largest instance number
3	Get	Number of Instance	UINT	01	The number of object instances
4	Get	Optional Instance Attribute List	Struct of UINT, UINT [ ]	–	The first 2 bytes contain the number of the optional instance attributes. Each following pair of bytes represents the number of other optional instance attributes (from 100 to 119).
5	Get	Optional Service List	UINT	0A	The number and list of any implemented optional services attribute (0: no optional services implemented)
6	Get	Max Class Attribute	UINT	07	The largest class attributes value
7	Get	Max Instance Attribute	UINT	02	The largest instance attributes value

The following table describes the Class Services:

Service Code (hex)	Name	Description
01	Get_Attribute_All	Returns the value of all class attributes
0E	Get_Attribute_Single	Returns the value of the specified attribute

The following table describes the Instance Services:

Service Code (hex)	Name	Description
01	Get_Attribute_All	Returns the value of all class attributes
0E	Get_Attribute_Single	Returns the value of the specified attribute

The following table describes the Instance attributes:

Attribute ID (hex)	Access	Name	Data Type	Value	Description
1	Get	Implemented Object List	Struct of UINT, UINT [ ]	–	Implemented Object list. The first 2 bytes contain the number of implemented objects. Each 2 bytes that follow represents another implemented class number. This list contains the following objects: oIdentity oMessage Router oAssembly oConnection Manager oQoS oPort oTCP/IP Interface oEthernet Link
2	Get	Number available	UINT	16	Maximum number of concurrent CIP (Class 1 or Class 3) connections supported

Attribute ID (hex)

Access

Name

Data Type

Value

Description

Get

Implemented Object List

Struct of UINT, UINT [ ]

–

Implemented Object list. The first 2 bytes contain the number of implemented objects. Each 2 bytes that follow represents another implemented class number.

This list contains the following objects:

oIdentity

oMessage Router

oAssembly

oConnection Manager

oQoS

oPort

oTCP/IP Interface

oEthernet Link

Get

Number available

UINT

Maximum number of concurrent CIP (Class 1 or Class 3) connections supported

Assembly Object (Class ID = 04 hex)

The following table describes the class attributes of the Assembly object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	02	Implementation revision of the Assembly Object
2	Get	Max Instances	UINT	65	The largest instance number
3	Get	Number of Instances	UINT	03	The number of object instances
4	Get	Optional Instance Attribute List	Struct of: UINT UINT [ ]	01 04	The first 2 bytes contain the number of optional instance attributes. Each following pair of bytes represents the number of other optional instance attributes.
5	Get	Optional Service List	UINT	Not supported	The number and list of any implemented optional services attribute (0: no optional services implemented)
6	Get	Max Class Attribute	UINT	07	The largest class attributes value
7	Get	Max Instance Attribute	UINT	04	The largest instance attributes value

The following table describes the Class Services:

Service Code (hex)	Name	Description
0E	Get Attribute Single	Returns the value of the specified attribute

The following table describes the Instance Services:

Service Code (hex)	Name	Description
0E	Get Attribute Single	Returns the value of the specified attribute
10	Set Attribute Single	Modifies the value of the specified attribute

Instances Supported

The bus coupler supports 2 Assemblies:

Name	Instance	Data Size
TM3BC IO Modules Output Data	100	2...64 words
TM3BC IO Modules Input Data	101	2...64 words

Assembly assignment

The following table describes the Instance attributes:

Attribute ID (hex)	Access	Name	Data Type	Value	Description
3	Get/Set	Instance Data	ARRAY of Byte	–	Data Set service only available for the controller output
4	Get	Instance Data Size	UINT	128	Size of data in byte

Connection Manager Object (Class ID = 06 hex)

The following table describes the class attributes of the Assembly Object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	01	Implementation revision of the Connection Manager Object
2	Get	Max Instances	UINT	01	The largest instance number
3	Get	Number of Instances	UINT	01	The number of object instances
4	Get	Optional Instance Attribute List	Struct of: UINT UINT [ ]	–	The number and list of the optional attributes. The first word contains the number of attributes to follow and each following word contains another attribute code. Following optional attributes include: ototal number of incoming connection open requests othe number of requests rejected due to non-conforming format of the Forward Open othe number of requests rejected because of insufficient resources othe number of requests rejected due to parameter value sent with the Forward Open othe number of Forward Close requests received othe number of Forward Close requests with an invalid format othe number of Forward Close requests that could not be matched to an active connection othe number of connections that have timed out because the other side has stopped producing, or a network was disconnected
6	Get	Max Class Attribute	UINT	07	The largest class attributes value
7	Get	Max Instance Attribute	UINT	08	The largest instance attributes value

The following table describes the Class Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all class attributes
0E	Get Attribute Single	Returns the value of the specified attribute

The following table describes the Instance Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all instance attributes
0E	Get Attribute Single	Returns the value of the specified attribute
4E	Forward Close	Closes an existing connection
52	Unconnected Send	Sends a multi-hop unconnected request
54	Forward Open	Opens a new connection

The following table describes the Instance attributes:

Attribute ID (hex)	Access	Name	Data Type	Value	Description
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 invalid format
3	Get	Open Resource Rejects	ARRAY of Byte	–	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 invalid 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 invalid format
7	Get	Close Other Requests	UINT	–	Number of Forward Close service requests which were rejected for reasons other than invalid format
8	Get	Connection Timeouts	UINT	–	Total number of connection timeouts that have occurred in connections controlled by this Connection Manager

TCP/IP Interface Object (Class ID = F5 hex)

This object maintains link specific counters and status information for an Ethernet 802.3 communication interface.

The following table describes the class attributes of the TCP/IP Interface Object:

Attribute ID (hex)	Access	Name	Data Type	Value	Details
1	Get	Revision	UINT	4	Implementation revision of the TCP/IP Interface Object
2	Get	Max Instances	UINT	1	The largest instance number
3	Get	Number of Instances	UINT	1	The number of object instances
4	Get	Optional	Struct of: UINT UINT [ ]	–	The first 2 bytes contain the number of optional instance attributes. Each following pair of bytes represents the number of other optional instance attributes.

The following table describes the Class Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all class attributes
0E	Get Attribute Single	Returns the value of the specified attribute

Instance Codes

Only instance 1 is supported.

The following table describes the Instance Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all instance attributes
0E	Get Attribute Single	Returns the value of the specified instance attribute

The following table describes the Instance Attributes:

Attribute ID (hex)	Access	Name	Data Type	Value	Description
1	Get	Status	DWORD	Bit level	o0: The interface configuration attribute has not been configured. o1: The interface configuration contains a valid configuration. o2...15: Reserved.
2	Get	Configuration Capability	DWORD	Bit level	o0: BOOTP Client o2: DHCP Client o4: Configuration Settable o6: Interface Configuration change requires reset o7: Acd Capable All other bits are reserved and set to 0.
3	Get	Configuration	DWORD	Bit level	o0: The interface configuration is valid. o1: The interface configuration is obtained with BOOTP. o2: The interface configuration is obtained with DHCP. o3: Reserved All other bits are reserved and set to 0.
4	Get	Physical Link	UINT	Path size	Number of 16 bits word in the element path
5	Get	Interface configuration	UDINT	IP Address	–
			UDINT	Network Mask	–
			UDINT	Gateway Address	–
			UDINT	Primary Name	–
			UDINT	Secondary Name	0: No secondary name server address has been configured.
			STRING	Default Domain Name	0: No Domain Name is configured
6	Get	Host Name	STRING	–	ASCII characters. 0: No host name is configured

Ethernet Link Object (Class ID = F6 hex)

This object provides the mechanism to configure a TCP/IP network interface device.

The following table describes the class attributes of the Ethernet Link object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	4	Implementation revision of the Ethernet Link Object
2	Get	Max Instances	UINT	3	The largest instance number
3	Get	Number of Instances	UINT	3	The number of object instances

The following table describes the Class Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all class attributes
0E	Get Attribute Single	Returns the value of the specified attribute

Instance Codes

Only instance 1 is supported.

The following table describes the Instance Services:

Service Code (hex)	Name	Description
01	Get Attribute All	Returns the value of all instance attributes
0E	Get Attribute Single	Returns the value of the specified instance attribute

The following table describes the Instance attributes:

Attribute ID (hex)	Access	Name	Data Type	Value	Description
1	Get	Interface Speed	UDINT	–	Speed in Mbit/s (10 or 100)
2	Get	Interface Flags	DWORD	Bit level	o0: Link status o1: Half/full duplex o2...4: Negotiation status o5: Manual setting / requires reset o6: Local hardware error detected All other bits are reserved and set to 0.
3	Get	Physical Address	ARRAY of 6 USINT	–	This array contains the MAC address of the product. Format: XX-XX-XX-XX-XX-XX

Attribute ID (hex)

Access

Name

Data Type

Value

Description

Get

Interface Speed

UDINT

–

Speed in Mbit/s (10 or 100)

Get

Interface Flags

DWORD

Bit level

o0: Link status

o1: Half/full duplex

o2...4: Negotiation status

o5: Manual setting / requires reset

o6: Local hardware error detected

All other bits are reserved and set to 0.

Get

Physical Address

ARRAY of 6 USINT

–

This array contains the MAC address of the product.

Format: XX-XX-XX-XX-XX-XX

EtherNet/IP Interface Diagnostic Object (Class ID = 350 hex)

The following table describes the class attributes of the EtherNet/IP Interface Diagnostic object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	01	Increased by 1 on each new update of the object
2	Get	Max Instance	UINT	01	Maximum instance number of the object

The following table describes the instance attributes of the EtherNet/IP Interface Diagnostic object:

Attribute ID (hex)	Access	Name	Data Type	Details
1	Get	Protocols supported	UINT	Protocol(s) supported (0=not supported, 1=supported): oBit 0: EtherNet/IP oBit 1: Modbus TCP oBit 2: Modbus Serial oBits 3...15: Reserved, 0
2	Get	Connection Diag	STRUCT of
		Max CIP IO Connections opened	UINT	Maximum number of CIP I/O connections opened.
		Current CIP IO Connections	UINT	Number of CIP I/O connections currently opened.
		Max CIP Explicit Connections opened	UINT	Maximum number of CIP explicit connections opened.
		Current CIP Explicit Connections	UINT	Number of CIP explicit connections currently opened
		CIP Connections Opening Errors	UINT	Incremented on each unsuccessful attempt to open a CIP connection.
		CIP Connections Timeout Errors	UINT	Incremented when a CIP connection is timed out.
		Max EIP TCP Connections opened	UINT	Maximum number of TCP connections opened and used for EtherNet/IP communication.
		Current EIP TCP Connections	UINT	Number of TCP connections currently open and being used for EtherNet/IP communication.
3	Get Clear	IO Messaging Diag	STRUCT of
		IO Production Counter	UDINT	Incremented each time a Class 0/1 CIP message is sent.
		IO Consumption Counter	UDINT	Incremented each time a Class 0/1 CIP message is received.
		IO Production Send Errors Counter	UINT	Incremented each Time a Class 0/1 message is not sent.
		IO Consumption Receive Errors Counter	UINT	Incremented each time a consumption is received that contains an error.
4	Get Clear	Explicit Messaging Diag	STRUCT of
		Class3 Msg Send Counter	UDINT	Incremented each time a Class 3 CIP message is sent.
		Class3 Msg Receive Counter	UDINT	Incremented each time a Class 3 CIP message is received.
		UCMM Msg Send Counter	UDINT	Incremented each time a UCMM message is sent.
		UCMM Msg Receive Counter	UDINT	Incremented each time a UCMM message is received.

IO Connection Diagnostic Object (Class ID = 352 hex)

The following table describes the class attributes of the IO Connection Diagnostic object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	01	Increased by 1 on each new update of the object.
2	Get	Max Instance	UINT	01	Maximum instance number of the object 0...n where n is the maximum number of CIP I/O connections. NOTE: There is an IO Connection Diagnostic object instance for both O->T and T->O paths.

Attribute ID (hex)

Access

Name

Data Type

Value (hex)

Details

Get

Revision

UINT

Increased by 1 on each new update of the object.

Get

Max Instance

UINT

Maximum instance number of the object

0...n

where n is the maximum number of CIP I/O connections.

NOTE: There is an IO Connection Diagnostic object instance for both O->T and T->O paths.

The following table describes the instance attributes of the I/O Connection Diagnostic object:

Attribute ID (hex)	Access	Name	Data Type	Details
1	Get Clear	IO Com Diag	STRUCT of
		IO Production Counter	UDINT	Incremented each time a production is sent.
		IO Consumption Counter	UDINT	Incremented each time a consumption is received.
		IO Production Send Errors Counter	UINT	Incremented each time a production is not sent due to an error.
		IO Consumption Receive Errors Counter	UINT	Incremented each time a consumption is received that contains an error.
		CIP Connection TimeOut Errors	UINT	Incremented each time a connection is timed out.
		CIP Connection Opening Errors	UINT	Incremented on each unsuccessful attempt to open a connection.
		CIP Connection State	UINT	State of the CIP IO connection.
		CIP Last Error General Status	UINT	General status of the last error detected on the connection.
		CIP Last Error Extended Status	UINT	Extended status of the last error detected on the connection.
		Input Com Status	UINT	Communication status of the inputs.
		Output Com Status	UINT	Communication status of the outputs.
2	Get	Connection Diag	STRUCT of
		Production Connection ID	UDINT	Connection ID for production.
		Consumption Connection ID	UDINT	Connection ID for consumption.
		Production RPI	UDINT	Requested Packet Interval (RPI) for productions, in μs.
		Production API	UDINT	Actual Packet Interval (API) for productions.
		Consumption RPI	UDINT	RPI for consumptions.
		Consumption API	UDINT	API for consumptions.
		Production Connection Parameters	UDINT	Connection parameters for productions.
		Consumption Connection Parameters	UDINT	Connection parameters for consumptions.
		Local IP	UDINT	Local IP address for I/O communication.
		Local UDP Port	UINT	Local UDP port number for I/O communication.
		Remote IP	UDINT	Remote IP address for I/O communication.
		Remote UDP Port	UINT	Remote UDP port number for I/O communication.
		Production Multicast IP	UDINT	Multicast IP address for productions, or 0 if multicast is not used.
		Consumption Multicast IP	UDINT	Multicast IP address for consumptions, or 0 if multicast is not used.
		Protocols supported	UINT	Protocol(s) supported (0 = not supported, 1=supported): oBit 0: EtherNet/IP oBit 1: Modbus TCP oBit 2: Modbus Serial oBits 3...15: Reserved, 0

Instance Attributes

The following table describes the Class Services:

Service Code (hex)	Name	Description
01	Get_Attributes_All	Returns the value of all class attributes.
0E	Get_Attribute_Single	Returns the value of a specified attribute.
4C	Get_and_Clear	Gets and clears a specified attribute.

Explicit Connection Diagnostic Object (Class ID = 353 hex)

The following table describes the class attributes of the Explicit Connection Diagnostic object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	01	Increased by 1 at each new update of the object.
2	Get	Max Instance	UINT	0...n (maximum number of CIP IO connections)	Maximum instance number of the object.

The following table describes the instance attributes of the Explicit Connection Diagnostic object:

Attribute ID (hex)	Access	Name	Data Type	Details
1	Get	Originator Connection ID	UDINT	O to T Connection ID
2	Get	Originator IP	UDINT	–
3	Get	Originator TCP Port	UINT	–
4	Get	Target Connection ID	UDINT	T to O Connection ID
5	Get	Target IP	UDINT	–
6	Get	Target TCP Port	UINT	–
7	Get	Msg Send Counter	UDINT	Incremented each time a Class 3 CIP Message is sent on the connection
8	Get	Msg ReceiveCounter	UDINT	Incremented each time a Class 3 CIP Message is received on the connection

Explicit Connections Diagnostic List Object (Class ID = 354 hex)

The following table describes the class attributes of the Explicit Connections Diagnostic List object:

Attribute ID (hex)	Access	Name	Data Type	Value (hex)	Details
1	Get	Revision	UINT	01	Increased by 1 at each new update of the object.
2	Get	Max Instance	UINT	02	Maximum number of concurrent list accesses supported.

The following table describes the instance attributes of the Explicit Connections Diagnostic List object:

Attribute ID (hex)	Access	Name	Data Type	Details
1	Get	Number of Connections	UINT	Total number of open Explicit connections
2	Get	Explicit Messaging Connections Diagnostic List	ARRAY of STRUCT	Contents of instantiated Explicit Connection Diagnostic objects
		Originator Connection ID	UDINT	Originator to Target connection ID
		Originator IP	UDINT	Originator to Target IP address
		Originator TCP Port	UINT	Originator to Target port number
		Target Connection ID	UDINT	Target to Originator connection ID
		Target IP	UDINT	Target to Originator IP address
		Target TCP Port	UINT	Target to Originator port number
		Msg Send Counter	UDINT	Incremented each time a Class 3 CIP message is sent on the connection
		Msg Receive Counter	UDINT	Incremented each time a Class 3 CIP message is sent on the connection

The following table describes the Class Services:

Service Code (hex)	Name	Description
08	Create	Creates an instance of the Explicit Connections Diagnostic List object.
09	Delete	Deletes an instance of the Explicit Connections Diagnostic List object.