I need to initialize and read status from Yokogawa UT55A by Modbus TCP.
I found "ni_modbus_1_2.zip" libraly and installed.
However, I could not understand how to use it.
I looked into the sample vi "opto22-crio_example.zip" "Opto22 Modbus TCP POC (WinXP).vi"
I run the sample using UT55A with IP and port# set.
It seems TCP connection openned OK, because, it gives connection ID.
However, "MB Ethernet Master Query.vi" gives timeout.
I also have difficulty understanding poly vi given by the libraly.
In the sample vi, it is not poly vi, but the libraly dose not provide same vi.
Please help me to make the very basic program.
Open connection, initialize, and read internal data of UT.
