ModbusBridge connection

Add a ModbusBridge connection to your MBTCP hierarchy

1. Right-click on the TCPIP_PORT branch, and select Add ModbusBridge Connection from the shortcut menu.

   A new ModbusBridge object is created. Default name is New_ModbusBridge_000.

   Note: You can add up to 247 objects of each type to the hierarchy. However, the bridge itself limits the number of PLCs that can be connected to the serial line.

2. Rename as appropriate.

   The New_ModbusBridge_000 Parameters configuration view is displayed.

   

This configuration view has four configurable elements.

• Bridge Type: From the drop-down menu, select the type of communications bridge to use for the connection to the TCP/IP Port.

  • Modbus Bridge: (Default) This attribute is editable. For this selection, the default value of Maximum outstanding messages is 2. The maximum value is 4, and the minimum value is 1.

  • NR&D Pen-T Bridge: (Alternative bridge type) This attribute is not editable. For this selection, the default value of Maximum outstanding messages is 1. The Port number and Maximum outstanding messages fields are disabled.

• Network address: Enter the host name or IP address of the bridge.

  • The number of characters should not exceed 255.

  • The field cannot be blank (number of characters cannot be zero).

  • The default value is 1.0.0.0.

• Port number: Displays the default port (socket) number, which is 502.

• Maximum outstanding messages: Enter the maximum number of queued messages allowed in the Modbus Bridge.

  Note: The Bridge Type used governs the value configured.

From the ModbusBridge branch of the Communication Driver hierarchy, the following objects can be created:

• Compact984 Object

• ModiconMicro Object

• TSXMomentumRS Object

• ModbusPLCRS Object