we are trying to control a ModBus slave via the serial port on a cRIO system. Normally this would be very simple (according to this guide) however it seems that we are not able to receive any signal from the slave device.
So, how can we check that the serial port is communicating with the slave modbus device? I can see in the VISA resources the ports being displayed correctly, therefore the cRIO identifies the port.
Should we pay attention to the cable used in connecting the RIO serial port to the slave device?