Does anybody here have experience with MODBUS? I need to interface a Click PLC (http://www.automationdirect.com/adc/Shopping/Catalog/Programmable_Controllers/CLICK_Series_PLCs_%28Stackable_Micro_Brick%29/PLC_Units/C0-01AR-D) to a Linux PC's serial port using the MODBUS RTU (http://modbus.org/) protocol.
Any advice or knowledge you can provide will be greatly appreciated. I would like to know what difficulties (or ease) you have experienced working with MODBUS. Thanks.