Ok ... after some close study of the ModbusMaster.cpp file its clear now. I have understood how the functions node.Read_Temperature(Slave_ID) is implemented. I can now modify it to suit my requirements . For all my Industrial Modbus-RTU applications I can use the ModbusLIbrary. !!
short ModbusMaster::Read_Temperature(uint8_t Slave_ID)
{
short R1, b1;
R1 = readInputRegisters(Slave_ID, 1, 1);{
b1 = getResponseBuffer(0);
delay(2);
clearResponseBuffer();
return b1;}
}
Thanks for your support Koepel !!