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PK Controller Ethernet/IP DST licensing

Hi All,

I've tried searching the forums and Books Online, but I haven't been able to find exactly the answer I need.  Could someone please help?  This is for Ethernet/IP devices on the PK controller on DeltaV version 14.FP2.

Is the PK controller DST licensing the same as EIOC licensing (e.g. one DST per device with AO been the maximum used)?  

Also does this also reduce the System Size DST count as compared with DST licensing of native DeltaV IO?

In an example, with Ethernet/IP on a PK controller, if you are connecting to remote IO with 10 AO’s you are only licensing for one AO DST.  However if you are using Classic IO or Charm IO you are licensing for each AO DST (which would be 10).

If this is the case, this then reduces the DST count of the System significantly which would reduce the Proplus etc. sizing significantly and reduce the overall system DST count when using PK controller Ethernet/IP to talk to devices.  I'm aware you also need to license per Ethernet Device as well as for the DST counts.  My question is specifically about how to license my DSTs when using PK Controller Ethernet/IP.

Christiana Spencer

1 Reply

  • Hi Christiana,

    In version 14.LTS, I've configured PK controllers for both Ethernet/IP and Modbus TCP communications. In each case, only one DST is used per logical device.

    For the PK configured to communicate over Ethernet/IP, it talks to two separate physical devices (PLCs). Both PLCs send and receive register data. One of them uses two logical devices (one for input, one for output), while the other uses three (two for inputs, one for output).

    Not surprisingly, when I display the I/O License Demand for the controller, it shows 3 AI and 2 AO consumed.

    Note that if you are transferring discrete data only with a logical device (not registers), the DST that is used up will be either a DI or a DO, depending on the direction of data communication.

    Hope this helps!

    Jamie