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Question about Control Client licenses

Arttu

Hello All,

I would like to ask what is the difference between these two types of Control Client licenses: "Citect SCADA Control Client" and "Citect SCADA Control Client, Redundant".

Our system topology consists of two Citect SCADA 2018 server computers (with redundancy configured) and two control client computers. The SCADA system can be operated with either of the two client computers through their user interfaces.

Which licenses should be configured in these two Control Client computers? I presume both server computers should have the "Citect SCADA Server" licenses installed, but how about the clients? Should they have Citect SCADA Control Client or Citect SCADA Control Client, Redundant licenses? We would like each of the four computers to have their own local floating license instead of installing all the licenses on the server computers. Is this possible?

Thanks!

  • Hi Arttu,

    The Clients should have the "Citect SCADA Control Client" license and yes this is possible.
    In your case the server have their Server license and each of the 2 clients has their own "Citect SCADA Control Client" either using USB or a SW license (FLM).

    The "Citect SCADA Control Client, Redundant" is only applicable if you would have the license floating on the redundant servers.
    In that case you would need 2x "Citect SCADA Control Client" on the primary server and 2x "Citect SCADA Control Client, Redundant" to always be sure you can run these 2 clients if one of the servers is down.
  • The "Redundant" Control Client license is intended to be used in Redundant Server scenario, where the licenses are hosted on the Server and shared with connected clients via the "Floating License" mechanism.
    The two types are identical in functionality, it is just about labeling and designing the license system.

  • Dear Erik & Olivier,

    thank you for your information. I activated the Control Client licenses on the client computers without problems, but unfortunately the client closes immediately upon starting the SCADA system. Runtime Manager complains about Software protection failure (no full licenses available).

    This is strange because the server computers do not have any problems starting up their SCADA server & client processes. Do you have any suggestions to solve this problem?

    Below is a screenshot from the client.

  • In the Project Editor make sure that you configure the Network Adress for your server as a real IP-adress or host name, NOT the loopback address 127.0.0.1 or localhost. Recompile if you made any changes.

    After compilation, please run the Computer Setup Wizard on all servers and clients and check the following:
    1. On the "Computer Role Setup" tab, make sure you select "Control Client" on your client machines.
    2. On the "Computer Role Setup" tab, make sure you uncheck "Full License" on your client machines.
    3. On the "Server Authentication" tab, make sure you enter the same password on all machines.

  • Thanks Patrick,

    I followed your instruction and managed to get the client working. Seems like unchecking the Full License checkbox solved the problem. Finally the Client starts up normally and I can operate the system through the client. What's the meaning of "Full License", anyway? What exactly is a "Full License Control Client"?

    Thanks for your help!

  • The checkbox tells the Client to use a full server license instead of a client license. This might be useful if you don't have a client license available (i.e. for testing purposes).
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