ControlLogix Gateway Routing for Connecting Rockwell AB Controllers

Connect to Remote Rockwell AB Controllers Using ControlLogix as a Gateway

The concept behind routing is to provide a means of communicating with a remote device over various networks. Just think of routing as a bridge between your local device and a remote device even if they are on two different field bus networks. Rockwell supports using their ControlLogix PLC as a router or gateway to other Rockwell networks.

Access to a remote (target) backplane allows for direct communication with the following modules located on that remote backplane:

  • ControlLogix 5500 CPUs
  • SoftLogix 5800 CPUs
  • Interface Modules for DH+ Gateway Applications
    • 1756-DHRIO
  • Interface Modules for ControlNet Gateway Applications
    • 1756-CNB
    • 1756-CNBR

Communications Networks Supported:

  • Ethernet (Ethernet/IP)
  • Data Highway Plus
  • ControlNet
  • Serial Gateway

 

 

 

 

EtherNet/IP Gateway Support

EtherNet/IP Gateway provides a means of communicating with MicroLogix, SLC 500, and PLC-5 series PLC on EtherNet/IP using the Allen-Bradley ControlLogix Ethernet Driver.

Requirements:

  • 2 or more EtherNet/IP Interface modules (such as 1756-ENBT).

  • MicroLogix, SLC500, or PLC-5 series PLC with EtherNet/IP connectivity.

Full details of the EtherNet/IP Gateway Device ID formatting, including an example, is available in the Appendices -> EtherNet/IP Gateway Setup section of the ControlLogix Ethernet driver help file.

Serial Gateway Support

Serial Gateway capability provides a means of communicating with ControlLogix, CompactLogix, FlexLogix, and SoftLogix PLCs on a serial network with the Allen-Bradley ControlLogix Ethernet Driver.

Requirements:

  • EtherNet/IP Interface module.

  • Local CPU with a serial port.

  • Remote ControlLogix, CompactLogix, FlexLogix, or SoftLogix CPU with a serial port.

Full details of the Serial Gateway Device ID formatting, including an example, is available in the Appendices -> Serial Gateway Setup section of the ControlLogix Ethernet driver help file.

Routing Path Examples

Due to the complex nature and sheer number of possible combinations of routing paths of this feature, examples provide the best tutorial.

The following examples include the entire the routing path portion of the Device ID minus the IP of the local ControlLogix ethernet module (located in Slot 3 of the ControlLogix in Position A of the diagram to the right).

So for reference, each of the routing paths below would be preceded by 192.192.181.116 followed by a comma when entered in the ControlLogix Ethernet driver Device ID field.

  1. PLC-5 (D) via DH+ Gateway
    • Model - DH+ Gateway: PLC-5
    • Path - 1,1.B.9
  2. PLC-5C (B) via ControlNet Gateway
    • Model - ControlNet Gateway: PLC-5C
    • Path - 1,2.A.1
  3. Logix 5500 (C) via Routing over DH+
    • Model - ControlLogix 5500
    • Path - 1,[1,2,8,1],0
  4. PLC-5/80C (E) via ControlNet Gateway / Routing over DH+
    • Model - ControlNet Gateway: PLC-5C
    • Path - 1,[1,2,8,1],2.A.3
  5. Logix 5500 (C) via Routing over DH+ / ControlNet
    • Model - ControlLogix 5500
    • Path - [1,2,8,1,2,2,15,1],0
  6. SLC 5/04 (G) via Routing over DH+ / ControlNet
    • Model - DH+ Gateway: SLC 5/04
    • Path - [1,2,8,1,2,2,15,1],1.A.2
  7. Logix5500 (H) via Routing over DH+ / ControlNet / Ethernet
    • Model - ControlLogix 5500
    • Path - [1,2,8,1,2,2,15,1,3,2,192.192.180.101,1],0

For further details on building a connection/routing path, see the ControlLogix Ethernet driver help file under the topic Appendices -> Communications Routing.

Important Notes:

  • The TOP Server ControlLogix Ethernet Driver specifies all Node IDs in Decimal format.  Rockwell software (RSLogix, etc.) specifies all Node IDs in Octal format, so please be aware that this conversion may be necessary when defining Device IDs in TOP Server.
  • It's also technically possible to use Logix routing syntax to perform ethernet-to-ethernet routing to a remote Logix controller on a different network from the PC where TOP Server is installed - for details on formatting the Device ID for ethernet-to-ethernet routing, click here.

Get Started Now

The demo is the full product once licensed. Once a client application connects to the  TOP Server, the TOP Server runtime will operate for 2 hours at a time. At the end of the 2 hour demo period, the demo timer must be reset by restarting the TOP Server runtime service.

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