This technical note describes the recommended settings for integrating 1769 CompactLogix controllers using the Class 1 Generic ENBT Modules and the IOD-4102 Allen Bradley Ethernet/IP driver for the Virtual IO Module.
Each dataset in DeltaV corresponds to a specific ENBT module in the Logix controller. Configuration of an ENBT module is described below. The Logix controller manages data updates for an ENBT dataset, i.e., the Logix is the Master in this communication. The VIM merely receives the data and sends it up to the DeltaV controller. By nature, this mechanism is very fast and suitable for highspeed data transfers from the Logix I/O sub-system into DeltaV. Please refer to the Ethernet/IP Master Driver for DeltaV Virtual IO Module manual to obtain the complete procedure on configuring the DeltaV and VIM componets of the interface.
Class1 (ENBT) connections are supported only in simplex VIM configurations because of the Master/Slave relationship between VIMs and Logix controllers. For ENBT connections, the VIM behaves as a slave.
The VIM configuration involves creating the VIM placeholder, as well as adding the device configuration. For more information on this component configuration, please refer to the Ethernet/IP Master Driver for DeltaV Virtual IO Module manual.
The DeltaV configuration involves creating the DeltaV Serial Device placeholder, as well as adding the dataset configuration. For more information on this component configuration, please refer to the Ethernet/IP Master Driver for DeltaV Virtual IO Module manual. Below you will find the configuration information for the DeltaV Dataset which refers to Assembly Instance 1.
This procedure will walk you through the configuration of the 1756-Generic ENBT Modules necessary for Class 1 communications with the Virtual IO Module.
|Prog. Serial Card||Calculated Assembly Instance|
At this point, the datasets in DeltaV correspond to a specific ENBT module in the Logix controller. Configuration of additional data points would follow the steps outlined above. By nature, this mechanism is very fast and suitable for highspeed data transfers from the Logix I/O sub-system into DeltaV.
In summary, we found no problems in using the 1769-L35E Compact Logix with DeltaV and the Virtual IO Module. Communication speed and performance was as expected and we had no problems with the device in setup or testing. As long as the CompactLogix interface does not change between different models, the interface using a Class 1 EtherNet/IP Connection to interface with the IOD-4102 Ethernet/IP VIM Driver will follow the procedure above.
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