Two IO servers should communicate over TCP/ethernet network by using RS485 and Modbus Serial protocol. Servers are accessing the same COM port (10) but with different addresses (1 and 2). Communication is at first successfully tested without LabView, with standalone applications (Modbus Poll) as shown below. There is some warning about illegal data value, but there is correct value on screen.
When LabView and VSPE software is used, there is no value. It is worth mentioning how the connection is established but shared variables show "No Known Value" in DSM.
In LabView application (attached as .lvlib and .vi files) there are zeros and no errors at all.
