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RS485 CPU COM PORT...2 instead of 1?


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Dears All,

Small introduction...just few days ago I finished one project that include MODBUS communication using RS485 CPU COM port without any problem.

I started with a new project; for the moment I don't included I/O modules; I created some STRUCT...I initialized TX/RX as  "Physically-Serial COM" and with surprise two RS485 CPU COM, port and port 1, were added in the I/O !?  If I "select" Modbus Panel the "port 1" disapear but the "port" still be present....just to test I created a new project and as first action I initialized as TX/RX and only 1 RS485 CPU COM port appears...what can be wrong in my project?

I am using 1.21.51; Windows 10.

thanks

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