3/30/2024 0 Comments Gx works 2 setup for monitor onlyHopefully this post will be of use to me or somebody else in the future. Make sure that "Use multiple CPU high speed transmission" is unchecked.Make sure the "Host CPU number" is specified.When this setting was removed I got the program running and could proceed with the communication test. I then received a MULTI CPU DOWN error which seemed to occur because the default setting is to share memory between multiple CPU. This can be fixed by configuring the correct number of CPU in the system. However, I could not get the PLC program running because of a CPU LAY ERROR. Since it was a simple communication test to see if the client API was reading and writing devices correctly I was not interested in the second CPU at all. The PLC system I had available was a two CPU system and I used GX IEC Developer to create a simple test program. I am writing a client API in C# for the MELSEC Communication Protocol and wanted to perform a communication test to a PLC.
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