现在工业信息画发展,很多工厂都需要做信息化展示,通常都是利用Android一体机来进行展示和交互。
Modbus协议是全球第一个用于工业现场的总线协议,与外设交互可以采用串口通信,tcp等方式;通常在Android中都是用tcp来进行读写,在Android中有Modbus4J.jar这个jar包使用;
简单介绍modbustcp:
读取的是从机 有几点需要知道 从机的ip地址,端口号(一般为502),slaveID,需要读的寄存器地址
读保持寄存器的功能号为03
先需要根据ip连接:
private void connectIP() { try { IpParameters tcpParameters = new IpParameters(); tcpParameters.setHost(MyApplication.getInstance().getIp_electric()); tcpParameters.setPort(PORT); ModbusFactory modbusFactory = new ModbusFactory(); master = modbusFactory.createTcpMaster(tcpParameters, true); master.setTimeout(TIME_OUT); master.setRetries(0); master.init(); if (master.isInitialized()) { mConnected = true; new Thread(readTask).start(); } } catch (Exception e) { master.destroy(); e.printStackTrace(); // L.e(getClass().getSimpleName(), e.getMessage()); try { Thread.sleep(10 * 1000); } catch (Exception ex) { } connectIP(); } }
由以上代码当master初始化成功之后 开棋=
/** * 板卡读线程 */ public Runnable readTask = new Runnable() { @SuppressLint("SimpleDateFormat") @SuppressWarnings("static-access") @Override public void run() { while (mConnected) { try { String msg = Utils.imitateData(master, SLAVE_ID).toString(); Log.i("msg", msg); Map<String, String> map = Utils.formatResult(msg); str = msg; Thread.currentThread().sleep(1000); } catch (Exception e) { e.printStackTrace(); } } } };
msg为读取结果 独取出来是类似与多个键值对的形式 需要自己进行拆分
imitateData为读取数据的方法 如下:
public static BatchResults<String> imitateData(ModbusMaster master, int slaveID) { BatchResults<String> results = null; BatchRead<String> batchRead = new BatchRead<String>(); //读int部分 batchRead.addLocator(Config.Voltage_1, BaseLocator.holdingRegister( slaveID, 0000, DataType.TWO_BYTE_INT_UNSIGNED)); batchRead.addLocator(Config.Voltage_2, BaseLocator.holdingRegister( slaveID, 0002, DataType.TWO_BYTE_INT_UNSIGNED)); batchRead .addLocator(Config.Electricity_1, BaseLocator .holdingRegister(slaveID, 0004, DataType.TWO_BYTE_INT_UNSIGNED)); batchRead .addLocator(Config.Electricity_2, BaseLocator .holdingRegister(slaveID, 0006, DataType.TWO_BYTE_INT_UNSIGNED)); //读float部分 电表1 batchRead.addLocator(Config.Voltage_Va_1, BaseLocator.holdingRegister( slaveID, 8, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Voltage_Vb_1, BaseLocator.holdingRegister( slaveID, 10, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Voltage_Vc_1, BaseLocator .holdingRegister(slaveID, 12, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Voltage_Avg_1, BaseLocator .holdingRegister(slaveID, 14, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_A_1, BaseLocator .holdingRegister(slaveID, 16, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_B_1, BaseLocator .holdingRegister(slaveID, 18, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_C_1, BaseLocator .holdingRegister(slaveID, 20, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_Avg_1, BaseLocator .holdingRegister(slaveID, 22, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Energy_Positive_1, BaseLocator .holdingRegister(slaveID, 24, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Energy_Reverse_1, BaseLocator .holdingRegister(slaveID, 26, DataType.FOUR_BYTE_FLOAT_SWAPPED)); //读电表2 float部分 batchRead.addLocator(Config.Voltage_Va_2, BaseLocator .holdingRegister(slaveID, 28, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Voltage_Vb_2, BaseLocator .holdingRegister(slaveID, 30, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Voltage_Vc_2, BaseLocator .holdingRegister(slaveID, 32, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Voltage_Avg_2, BaseLocator .holdingRegister(slaveID, 34, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_A_2, BaseLocator .holdingRegister(slaveID, 36, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_B_2, BaseLocator .holdingRegister(slaveID, 38, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_C_2, BaseLocator .holdingRegister(slaveID, 40, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Electricity_Avg_2, BaseLocator .holdingRegister(slaveID, 42, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Energy_Positive_2, BaseLocator .holdingRegister(slaveID, 44, DataType.FOUR_BYTE_FLOAT_SWAPPED)); batchRead.addLocator(Config.Energy_Reverse_2, BaseLocator .holdingRegister(slaveID, 46, DataType.FOUR_BYTE_FLOAT_SWAPPED)); try { results = master.send(batchRead); } catch (ModbusTransportException e) { e.printStackTrace(); } catch (ErrorResponseException e) { e.printStackTrace(); } return results; }
以上就根据每个寄存器的数据类型进行读取0-46位的数据