Value conversion

Value conversion between C# and S7 plc

• Read S7 Word:

ushort result = (ushort)plc.Read("DB1.DBW0");

• Write S7 Word:

ushort val = 40000;
plc.Write("DB1.DBW0", val);

• Read S7 Int / Dec, you need to use the method ConvertToShort():

short result = ((ushort)plc.Read("DB1.DBW0")).ConvertToShort();

• Write S7 Int / Dec, you need to use the method ConvertToUshort():

short value = -100;
plc.Write("DB1.DBW0", value.ConvertToUshort());

• Read S7 DWord:

uint result = (uint)plc.Read("DB1.DBD40");

• Write S7 DWord:

uint val = 1000;
plc.Write("DB1.DBD40", val);

• Read S7 Dint, you need to use ConvertToInt():

int result2 = ((uint)plc.Read("DB1.DBD60")).ConvertToInt();

• Write S7 Dint:

int value = -60000;
plc.Write("DB1.DBD60", value);

• Read S7 Real, you need to use ConvertToDouble():

double result = ((uint)plc.Read("DB1.DBD40")).ConvertToDouble();

• Write S7 Real, you need to use ConvertToUInt():

double val = 35.687;
plc.Write("DB1.DBD40", val.ConvertToUInt());

• Read bool/bit from byte

myByte = plc.ReadBytes(DataType.DataBlock, 153, 0, 1); // myByte = 5 = 0000 0101
myByte.SelectBit(0)  // true
myByte.SelectBit(1)  // false

• Write bool/bit from byte

plc.WriteBit(DataType.DataBlock, 157, 0, 0, false);