Good morning,
My name is Joseph Rhodes; I’m an Electronics Technician with the City of Tuscaloosa at the Hilliard Fletcher Wastewater Treatment Plant. We use Sierra Wireless AirLink RV50 cellular modems at a lot of our liftstations to communicate IO from PLCs back to our SCADA system. These cellular modems have only been used as a communication means for trafficking data back and forth. I just recently discovered that you could do so much more with these cellular modems and I’d love to learn a lot more about these cellular modems. I’d love to learn more about the modbus rtu/tcp functions of these cellular modems. Is there a modbus address map floating around for these cellular modems? One example of what I would like to do with this modbus function is to potentially extract the signal strength of the cellular modem and show it on VTScada. Is there an instruction set that details how to go about configuring the serial port of these cellular modems? I want to test bench these celluar modems and see what their limits are.