#13 Write Boolean

[Josef Balom]

After searching a couple of hours I figured out that it is nececcery to multiply the position of the bits with 8 to get shifted thorugh the DB while writing the values - else it is always writing to Byte 0.

I putted on the Sharp7 lib a new function for myself to not to do this work in my business classes (and forget after a while).

        /// <summary>
        /// WriteBit: writes a boolean to the PLC
        /// </summary>
        /// <param name="Area"></param>
        /// <param name="DBNumber"></param>
        /// <param name="Position"></param>
        /// <param name="Bit"></param>
        /// <param name="Amount"></param>
        /// <param name="WordLen"></param>
        /// <param name="Buffer"></param>
        /// <returns></returns>
        public int WriteBit(int Area, int DBNumber, int Position, int Bit, int Amount, int WordLen, byte[] Buffer)
        {
            int BytesWritten = 0;
            int Start = Position * 8 + Bit;

            return WriteArea(Area, DBNumber, Start, Amount, WordLen, Buffer, ref BytesWritten);
        }

And this is my call in the PLCService

        private int WriteBit(int db, int pos, int bit, bool value)
        {
            lock (_locker)
            {
                Debug.WriteLine(DateTime.Now.ToString("HH:mm:ss.fff") + "\t WriteBit: " + "DB" + db + ".dbx " + pos + "." + bit + "\t" + value);
                var buffer = new byte[1];
                S7.SetBitAt(ref buffer, 0, bit, value);
                return _client.WriteBit(S7Consts.S7AreaDB, db, pos, bit, buffer.Length, S7Consts.S7WLBit, buffer);
            }
        }

[Davide Nardella]

"After searching a couple of hours I figured out that it is nececcery to multiply the position of the bits with 8 to get shifted thorugh the DB while writing the values"

You could have saved a couple of hours if you had read pag.105 of the reference manual :D :D

Anyway thanks for the improvement ;) ;) in that way it's more confortable.