HOW to use a opc variable to genarate a ALARM in a freelance2016 system?
i import some opc item to my freelance2016 system,but i can not deal these varables to genarate ALARM,how can i do?
Asked 4 months ago
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In Freelance only Freelance Operations and Freelance Engineering have OPC client functionality. The controller does not. That is why the controller cannot access variables created from 3rd party OPC servers. In order to do that you need to create an OPC Gateway within Freelance and then use a 3rd party data-pump that sits on top of the Freelance OPC gateway and the 3rd party OPC server. The data-pump would cyclically read one or several OPC items from the 3rd party OPC server and write the received values to one or several Freelance variables residing inside the controller via the Freelance OPC Gateway. This can also work in the opposite direction.
A more easy way would be to connect the Freelance controller via Modbus TCP to the 3rd party system. This way the variable would land directly in the controller variables via a receive function block.
A more easy way would be to connect the Freelance controller via Modbus TCP to the 3rd party system. This way the variable would land directly in the controller variables via a receive function block.
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