code: final public void writeMultipleCoils(int serverAddress, int startAddress, boolean[] coils) throws
              ModbusProtocolException, ModbusNumberException, ModbusIOException {
          processRequest(ModbusRequestBuilder.getInstance().buildWriteMultipleCoils(serverAddress, startAddress, coils));
      }
docs: This function code is used to force each coil in a sequence of coils to either ON or OFF in a
  remote device. The Request PDU specifies the coil references to be forced. Coils are
  addressed starting at zero. Therefore coil numbered 1 is addressed as 0.
  The requested ON/OFF states are specified by contents of the request array of boolean. A logical 'true'
  in position of the array requests the corresponding output to be ON. A logical 'false' requests
  it to be OFF.
  
  @param serverAddress a slave address
  @param startAddress  the address of the coils to be written
  @param coils         the coils
  @throws ModbusProtocolException if modbus-exception is received
  @throws ModbusNumberException   if response is invalid
  @throws ModbusIOException       if remote slave is unavailable