SCADAOutput node

This topic contains the following sections:

Purpose

Use the SCADAOutput node to send a message to a client that connects to the broker using the MQIsdp protocol across the WebSphere MQ Telemetry Transport. You would typically use the Publication node to send output to a SCADA client. The SCADAOutput node lets you write your own Publication node.

If you include a SCADAOutput node in a message flow, you must also include a SCADAInput node, regardless of the source of the messages, because the SCADAInput node provides the connectivity information required by the SCADAOutput node.

When you deploy message flows containing SCADA nodes to a broker, you must deploy them to a single execution group, regardless of the number of message flows.

You cannot use the SCADAOutput node to change the transactional characteristics of the message flow. The transactional characteristics set by the message flow's input node determine the transactional behavior of the flow.

You cannot use SCADAOutput nodes in message flows that you deploy to z/OS systems.

If you create a message flow to use as a subflow, you cannot use a standard output node; you must use an instance of the Output node to create an out terminal for the subflow through which the message can be propagated.

If you do not want your message flow to send messages to a SCADA device, you can choose another supported output node.

The SCADAOutput node is represented in the workbench by the following icon:

SCADAOutput node icon

Using this node in a message flow

Use the Publication node to publish messages for SCADA devices. Use this node if you want to process the publication messages in a particular way for these devices.

Configuring the SCADAOutput node

When you have put an instance of the SCADAOutput node into a message flow you can configure it. Right-click the node in the editor view and click Properties. The node's description properties are displayed.

All mandatory properties for which you must enter a value (those that do not have a default value defined) are marked with an asterisk on the properties dialog.

Configure the SCADAOutput node as follows:

  1. Select Description in the properties dialog navigator to enter a short description, a long description, or both.
  2. Click Apply to make the changes to the SCADAOutput node without closing the properties dialog. Click OK to apply the changes and close the properties dialog.

    Click Cancel to close the dialog and discard all the changes that you have made to the properties.

Now connect the node's terminals to determine how it operates within this message flow.

Connecting the terminals

Connect the in terminal to the node from which messages bound for SCADA destinations are routed.

Connect the out or failure terminal of this node to another node in this message flow to send the message to an additional destination.

Terminals and properties

The SCADAOutput node terminals are described in the following table.

Terminal Description
In The input terminal that accepts a message for processing by the node.
Failure The output terminal to which the message is routed if a failure is detected when the message is put to the output queue.
Out The output terminal to which the message is routed if it has been successfully put to the output queue, and if further processing is required within this message flow.

The following table describes the node properties; the column headed M indicates whether the property is mandatory (marked with an asterisk on the properties dialog if you must enter a value when no default is defined), the column headed C indicates whether the property is configurable (you can change the value when you add the message flow to the bar file to deploy it).

The SCADAOutput node Description properties are described in the following table.

Property M C Default Description
Short Description No No   A brief description of the node.
Long Description No No   Text that describes the purpose of the node in the message flow.