I’m looking for a solution to wirelessly connect two or more Modbus RTU devices.
Here is the setup:
PLC controlled system
Has RS485 and ethernet ports available
PC to log data from and control the remote device
USB and ethernet ports available
Possibility of adding a second similar remote node in the future.
I need to receive measurement values from and send control messages to the remote device. My current plan is to use Modbus RTU from the PLC to the main PC. I believe the NCD RS485 modems in AutoEncoder mode would work for this. In that case I would use a RS485 to USB adapter to connect the receiver modem to the PC.
What is the difference of these two devices in my use case? Are they interchangeable?
I would prefer an ethernet connection over USB at the main device. Would it be possible to interface to this wireless RS485 network using the “Industrial IoT Wireless to Ethernet Modem”
Instead of using RS485 and Modbus RTU, would it be possible to use two of “Industrial IoT Wireless to Ethernet Modem” to directly send TCP/IP communications between the devices?
These devices look very flexible so I’m trying to find the best configuration for us.
Thanks for the help!