Example #1
0
        /** Creates a packet to write data to ModBus. */
        public static byte[] makeWritePacket(ModAddr addr)
        {
            byte[] data = new byte[12];
            BE.setuint16(data, 0, tid++); //transaction id
//        BE.setuint16(data, 2, 0);    //protocol
            BE.setuint16(data, 4, 6);     //length
//        data[6] = 0;    //unit ID

            data[7] = 5; //set single coil
            BE.setuint16(data, 8, addr.io_number - 1);
            BE.setuint16(data, 10, addr.state ? 0xff00 : 0x0000);
            return(data);
        }
Example #2
0
        /** Creates a packet to read data from ModBus. */
        public static byte[] makeReadPacket(ModAddr addr)
        {
            byte[] data = new byte[12];
            BE.setuint16(data, 0, tid++); //transaction id
//        BE.setuint16(data, 2, 0);    //protocol
            BE.setuint16(data, 4, 6);     //length
//        data[6] = 0;    //unit ID

            data[7] = readFunc(addr.io_type);
            BE.setuint16(data, 8, addr.io_number - 1); //starting addr
            BE.setuint16(data, 10, addr.length);       //bit count

            return(data);
        }
Example #3
0
        public static ModAddr decodeAddress(String addr)
        {
            //C# - coil output
            //DI# = discrete input
            ModAddr ma = new ModAddr();

            ma.length = 1;
            switch (addr.CharAt(0))
            {
            case 'C':
                ma.io_type   = ModTypes.C;
                ma.io_number = (short)Int32.ValueOf(addr.Substring(1));
                break;

            case 'D':
                ma.io_type   = ModTypes.DI;
                ma.io_number = (short)Int32.ValueOf(addr.Substring(2));
                break;

            default:
                return(null);
            }
            return(ma);
        }