透過command讀取modbus，demo code目前只能讀取AI，
由5個參數組成:
	{"Station Number:"},
	{"Function Code:"},
	{"Write Address:"},
	{"Remote Address:"},
	{"IO Counter:"}

Write Address為自己的buffer位置，可依據不同點位放置，測試可以填0
Remote Address為遠端位置，測試可以填0