Try just getting the slave working first with the PC as the master.
There are many SCADA apps out there for free.
Also, I think you should be able to use RS232-RS485 converters, so you can stay away from the 485.
Try just getting the slave working first with the PC as the master.
There are many SCADA apps out there for free.
Also, I think you should be able to use RS232-RS485 converters, so you can stay away from the 485.