Explicit Messaging - Online Action: Get_Attributes_Single
Original instructions
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Overview
The following example shows you how to use the Online Action window in the Control Expert EtherNet/IP configuration tool to execute an unconnected explicit message that retrieves the vendor ID from a third-party device—in this case a Rockwell Automation 1734-AENT PointIO adapter (revision 2.1)—using the Get_Attributes_Single service.
You can perform the same explicit messaging service using the SEND_REQ function block.
Configuring the Explicit Message
To configure, then execute, an unconnected explicit message that will retrieve the vendor ID from a third-party device, follow these steps:
Step
Action
1
Launch the EtherNet/IP configuration tool from the Configuration page of the communication module’s Properties window.
2
In the EtherNet/IP configuration tool, begin on-line operations by clicking the Go Online button .
3
Click on the Network Detection tab to enable online actions
4
Open the Online Action window by selecting Network → Online Action.
5
In the Explicit Messaging page, complete the following fields:
IP Address
Type in the IP address of the third-party device. In this example, the IP address is: 192.168.001.011.
Class
Type in the number that identifies the object class. In this example, the number representing the assembly class object is 1.
Instance
Type in the number that identifies the instance of the identity class object. In this example, the number is 1.
Attribute
Place a check mark in the checkbox to enable this field, then type in the number identifying the attribute containing vendor ID. In this example, the number is 1.
Name
Select the name of the explicit messaging service. In this example, select Get_Attributes_Single.
Messaging
Select the type of explicit message. In this example, select Unconnected.
(The explicit messaging configuration is displayed, below.)
6
To execute the unconnected explicit message, click Send to Device.
7
The Receive area displays the message output, and the Status area displays the success or failure of the explicit messaging procedure:
8
Click OK to close the window.