使用Modbus协议将字符串值（10个字符）写入标记400001

Question

我有以下情况：我需要将信息发送到将在PTV屏幕上显示的标签400001到400006。我没有太多使用modbus的经验，但据我所知，我应该使用功能代码16来设置标签值。

我目前有以下代码，似乎可以在模拟器中使用：

// Open the connection
TCPMasterConnection connection = new TCPMasterConnection(address);
connection.setPort(Modbus.DEFAULT_PORT);
connection.connect();

ModbusTCPTransaction trans = new ModbusTCPTransaction(connection); //the transaction

// Prepare the request
SimpleRegister[] registers = new SimpleRegister[1];
registers[0] = new SimpleRegister(15);

WriteMultipleRegistersRequest req = new WriteMultipleRegistersRequest(400001, registers);

req.setUnitID(1);
trans.setRequest(req);
//No we are ready for action. The last part is executing the prepared transaction the given (repeat) number of times and then for cleanup, close the connection:
log.debug("ModbusSlave: FC" + req.getFunctionCode() + " ref=" + req.getReference() + " value=" + registers[0].getValue());
trans.execute();

// Close the connection
connection.close();

但是如何设置像“0010323”这样的字符串？