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NI OPC server and DSC module

Hello
 
        I'm using LAbVIEW8.2.1 and I need connnect LabVIEW(PC) to PLC with Modbus. Please advise the belows
 
        1. What module is required?(I'm not sure DSC module)
 
        2.The NI(IA) OPC) server is require?
 
        And I have little confuse what is the relation between DSC module and OPC server
 
Thank you
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Hi,

 

There are two things required

 

1. Connecting to PLC from PC - You need a OPC Server (NI or Non NI); Check the OPC Server has driver support of the PLC.

2. Getting the PLC Status to LabVIEW from OPC Server - You need NI DSC module to create a OPC Client which can Read/Write the status from NI OPC server.

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If the device uses modbus, then you can use the Modbus Library in your LabVIEW program to communicate with the device.

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