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Technical Notes
A-B DF1 Serial to A-B PLCs Channel 0 via Net-ENI Ethernet IP Interface
By Edin Rakovic on 10.15.10
Product: DeltaV Serial Drivers

The purpose of this technical note is to describe the options for integrating Allen-Bradley PLCs using Channel 0 via 1761-Net-ENI Ethernet IP Interface with DeltaV.

A proven solution for the integration of older A-B PLCs like PLC5s and SLC is the use of MYNAH's IOD-1123, Allen Bradley DF1 Driver for the DeltaV Serial Card. Customers who want to link this driver directly to Channel 0 of Allen-Bradley PLCs over a long ethernet link need to use a bridge, an excelent example is two of the A-B 1761 NET-ENI or NET-ENIw modules. We have tested the NET-ENI and NET-ENIw in our labs at MYNAH. There is a faster, more compact offering that should provide an excellent alternative to this configuration utilizing our IOD-4102 Ethernet IP Virtual I/O Module to A-B PLCs via NET-ENI. A product data sheet for the NET-ENI / NET-ENIw can be found on the Rockwell Website as well as the NET-ENI Utility.

Figure 1: An integration drawing of this solution.

Configuration

Confirm that both DeltaV and the A-B PLC is configured per Allen-Bradley DF1 Simplex Driver Series 2 Manual and both are configured with the same Node Address.

  1. Confirm the DeltaV Device Configuration has the desired Device Address.
    Figure 2: DeltaV Device Configuration
  2. Confirm the Allen-Bradley PLC Channel 0 to support the DeltaV Device Configuration.
    1. Channel Configuration General Tab
      Figure 3: Allen-Bradley General Configuration
    2. Channel Configuration Channel 0 Tab
      Figure 4: Allen-Bradley Channel 0 Configuration

Configure the first 1761-NET-ENI labeled as 1

  1. Open and connect to the 1761-NET-ENI
  2. Go through all of the tabs and make sure all of the values are set to the Factory Defaults. This can also be accomplished by clicking on the Defaults button in the Load From box.
  3. Enter the IP configuration which meets your network requirements
    Figure 4: Mynah ENI IP Addr Configuration
  4. Enter the Message Routing information based on the selected node. The Destn column refers to the node refrences, therfore for Node 1 the IP Address is the IP of NET-ENI labeled 2.
    Figure 5: Mynah ENI IP Message Routing Configuration
  5. Save configuration to file and ENI ROM by clicking on the button in the Save To box.

Configure the second 1761-NET-ENI labeled as 2

  1. Open and connect to the 1761-NET-ENI
  2. Go through all of the tabs and make sure all of the values are set to the Factory Defaults. This can also be accomplished by clicking on the Defaults button in the Load From box.
  3. Enter the IP configuration which meets your network requirements, notice the message routing is not configured on this 1761-NET-ENI.
    Figure 6: Mynah ENI IP Addr Configuration
  4. Save configuration to file and ENI ROM by clicking on the button in the Save To box.

Troubleshooting

Troubleshooting If DeltaV Diagnostics show "No Response" on configured dataset, please double check all of the settings and make sure that the connection to the Allen-Bradley PLC Channel 0 is configured per the Allen-Bradley DF1 Simplex Driver Series 2 Manual>