[Feature Request]: 建议(Suggestion)参考 NI OPC Server (National Instruments OPC Server) 与 Labview 的交互方式(Shared Variables)

chzhm159 commented 1 year ago

What would you like to happen?

软件架构可以参考 NI OPC Server (National Instruments OPC Server) 与 Labview 的交互方式(Shared Variables). (The software architecture can refer to the interaction between NI OPC Server (National Instruments OPC Server) and Labview.(Shared Variables))

--- --------------- TCP/UDP/Serial Port... Connectiong Manager -------------- 1.1 IP,Port,Device Type etc.
1.2 Disconnection Retry etc.
1.3 Connection Event Emit etc.
------------------ Protocol Adapter -------------------------------------------- 2.1 Siemens/Omron/... PLC Communication Protocol Adapter
2.2 Read/Write 2.3 Data Type Convert
------------------ Data Cache(Memory Cache etc.) Layer---------------------- 3.1 Variable Binding (Variable Mapping?)
3.2 Data Refresh(Active, Passive, Timed etc.)
------------------ Application Layer --------------------------------------------- The application layer will be very simple based on the data cache layer. In the application layer, you only need to declare variables, get values, and assign values.

Programming Languages

[ ] plc4j
[ ] plc4go
[ ] plc4c
[ ] plc4net

Protocols

[ ] AB-Ethernet
[ ] ADS /AMS
[ ] BACnet/IP
[ ] CANopen
[ ] DeltaV
[ ] DF1
[ ] EtherNet/IP
[ ] Firmata
[ ] KNXnet/IP
[ ] Modbus
[ ] OPC-UA
[ ] S7

hutcheb commented 1 year ago

Hi chzhm159,

The NI OPC Server is primarily an OPC-DA server. There is no OPC-DA driver within PLC4X.

However, I believe there is an optional package for the NI OPC server for it to support OPC-UA. You could then use the OPC-UA driver in PLC4X.

In either case, If you could outline a bit more about what you are trying to achieve and your architecture it would help.

Ben

chzhm159 commented 1 year ago

使用 Java 举例,PLC 使用 KEYENCE KV-7500,读取一个32位有符号整数.

Using Java as an example, PLC uses KEYENCE KV-7500 to read a 32-bit signed integer.

First step: configuration variables(Device information and register information)

{
  "devices": [                      
    {
      "deviceID": "L1:D1",          // device unique identifier(设备全局唯一编号)
      "deviceName": "station-1",
      "deviceModel": "kv-7500",     
      "protocolType": "upperlink",  
      "host": "192.168.100.1",      
      "port": 8501,
      "connectTimeout": 3000,       
      "retryInterval": 3000,        
      "tags": [
        {
          "tagName": "output",
          "key": "L1:D1:output",    // Globally unique key for each tag(Tag全局唯一编号)
          "registerType": "FM",     // register area (plc寄存器区域名称)
          "registerIndex": 100,     // register index (寄存器区编号)
          "offset":0,
          "unit": "int32",          // register data type (寄存器数据类型)
          "count": 3,
          "readInterval": 10,       // Read cycle, in milliseconds (读取周期,单位毫秒)
          "timeout": 60000,                 
          "operate": "r",           // read or write or (read and write) (读/写/(读写))
        }
      ]
    }
  ]
}

Framework: 框架的工作就是解析配置,建立与plc的链接,同时具备失败重连的特性,同时根据每个Tag的配置自动读取对于的数据缓存起来.将链接管理与协议解析对编程人员完全屏蔽,仅需要了解plc基本的寄存器区域,名称,数据类型等通用概念即可 The job of the framework is to parse the configuration, link the device, and automatically collect the data of the PLC and save it to the cache

Second step: 业务代码就可以非常简单,完全不关心plc的链接与通信协议 My business code can be written like this:

public class Demo{

  public void onConnectSuccessfully(){
    // connection succeeded (链接成功)
  }

  public void onConnectFailed(){
   // connection failed (链接失败)
  }

  public void onDisconnected(){
   // lost connection (连接中断开)
  }

  public void onClosed(){
   // connection closed (连接关闭)
  }
  /**
  * Called according to functional needs (根据功能需要来调用)
  */  
  public void onOutput(){
    // Get instance by unique identifier for each variable
    Tag otherTag = TagMangager.getTag("L1:D1:output");

    // ==== read value ===    

    // Read mode 1. Read the original value, which can default to Byte
    Byte[] raw = tag.getRawData();
    int raw = DataUtils.convert2Int(raw);

    // Read mode 2. Directly obtain the value of a specific type
    int raw = tag.getInt();

    // >>>>> Business logic....save data to database, calculate, judge, etc.

    // ==== [Optional] write value ===
    tag.write(Byte[] data);

    // ==== [Optional] Read and write values to other variables ===
    Tag otherTag = TagMangager.getTag("key");
    otherTag.getXXX();
    otherTag.write(Data);
  }
}

hutcheb commented 1 year ago

Hi chzhm159,

Sorry I am still a little confused about what exactly you're requesting. The example you've given seems to use some sort of Modbus derivative, yet the original was a request to support an NI OPC Server.

Can you please provide some more details about what you're trying to communicate to, or if you have a packet capture from from another framework you'd like to see in PLC4X.

Kind Regards

Ben

chzhm159 commented 1 year ago

首先,为我给您带来的困惑表示歉意 First of all, apologies for the confusion I caused you. 我希望能做出一些贡献,当我对plc4x学习更多的之后 I hope to make some contributions as I learn more about PLC4X

apache / plc4x