The Workbench provides the view into a node's installation, configuration and resource definition. The Workbench also provides access and control over those resources.
A device is a resource that can represent a physical device, such as a programmable logic controller (PLC), an RF tag reader or a sensor. A device can also be defined in one node to represent a device that is defined and supported in another node. This allows your application solution to have access to devices and their data independent of their location or connectivity details.
This section describes defining a device that will receive datamessages from CTI 2500 series programmable controllers. The CTI 2572 Listener is a unique device type in that it does not represent a physical CTI PLC. Instead, this “Listener” device, when started, activates a process on the node that will listen for Write Data and Memory Exchange CAMP protocol messages sent from CTI 2500 series programmable controllers. The ladder logic running on the 2500 series controllers must be configured to route the CAMP message to the node.
Defining a CTI 2572 Listener device
To define a device that represents an CTI 2572 Listener device, follow these steps:
- From the Workbench left pane, expand the node where you want to define the device.
- Select the Devices icon.
The Devices window appears as the right pane.
The Devices window provides a table format that lists the previously defined devices. - To define a new device,
select New at the bottom of the
pane.
The Device window appears. The available device types are determined by the device support that is installed in the node. - Use the Type down-arrow, to
select CTI 2572 Listener under
the Control Technologies Inc
(CTI) group.
The Device window changes to accommodate the selected device type.
-
To define a device that represents a CTI 2572 Listener device, set this new device’s parameters as follows:
Parameter Description Name Enter a name for the CTI 2572 Listener device. Type Select CTI 2572 Listener Port Enter the port number the CTI 2572 Listener will open on the node to receive messages from the 2500 series programmable controllers. The default is 1505, but may be changed. If the port is changed a corresponding change must be made in the controller's ladder logic to route the message to the correct port. Number of Messages to Report Enter the number of messages the Listener should keep track of on a per connection basis. These messages can be viewed on the Workbench Variables panel Module ID (Hex) A numeric value that will be reported back to the 2500 series programmable controller that sent the message. This value is used to report to the controller the type of controller it is communicating with. The default value of 2572 should be used. Protocol Manager Number (Hex) A numeric value that will be reported back to the 2500 series programmable controller that sent the message. This value can also be used to identify the node.
- Select Validate to have the parameters validated and to attempt to open a connection at the port location on the node. If there is a problem, an error code will be displayed, but it is likely due to another Listener or application is connected to the port.
- Select Save to save the device definition. The device will appear in the Devices window list of devices.
- You can now control the device (Start, Stop), access the device’s variables by using the Variables window, and build solutions that use the device’s resources.