Project Design : We want to create a railway SCADA (Supervisory Control and Data Acquisition) program with a HMI (Human Machine Interface ) to provide below multiple railway junctions and stations state monitor and control functions:
- Provide PLC (Modbus TCP) connection interface to fetch/set the PLCs' register/coils state.
- Visualize the connected PLC's holding register state, coils state and the digital I/O state.
- Visualize the tracks junction the sensor & signal state and sensor-signal auto-controlling process.
- Visualize the tracks train-station sensor & signal state and sensor-signal auto-controlling process .
- Provide the sensors and signals' state overload control (admin engineer debug permission).
[TOC]
The Railway System SCADA HMI is part of the Railway IT/OT System security test platform. It is used to monitor the whole railway tracks sensors-signal auto control system. You can refer the system topology diagram to check its function in the system by below link:
- Railway IT/OT System security test platform system structure diagram
- Railway IT/OT System security test platform network topology diagram
Railway System SCADA HMI User Interface
The HMI contents below components and function:
- A train sensors-signal relation map to show sensors state, signals state and the sensors-signals auto control relation ship (tracks-cross-junction and train-stations).
- Three PLC panel to show the junction-sensor-signal control system's Digital Input/Output state, PLC holding register state and the PLC Coils state.
- Three PLC panel to shoe the station-sensor-signal control system's Digital Input/Output state, PLC holding register state and the PLC Coils state.
Program version: v0.1.2
Code Base: https://github.com/LiuYuancheng/Metro_emulator/tree/main/src/scadaEmuUI
The program contents 2 main threads:
- Main user interface thread : HMI map to show the junctions and stations' sensor-signal state, junction control PLC set [PLC-00, PLC-01 and PLC-02] state with the digital I/O information, station control PLC set [PLC-03, PLC-04 and PLC-05] state with the digital I/O information.
- PLC Communication thread : communicate with the Railway Junctions Sensor-Signal System Control PLC Simulator and Railway Stations Sensor-Signal System Control PLC Simulator through Modbus TCP to get the OT data.
This is the program modules workflow diagram:
The program user interface design detail is shown below:
| Idx | Program File | Execution Env | Description |
|---|---|---|---|
| 1 | scadaHMIConfig.txt | system config file. | |
| 2 | scadaGobal.py | python 3 | System global file, the system config file's contents will be saved in the global parameters. |
| 3 | hmiPanel.py | python 3 | All the UI function panels (PLC) module. |
| 4 | scadaDataMgr.py | python 3 | This module provides map manger to generate the display panel , data manger to process the PLC data, PLC connector to communicate with PLC. |
| 5 | hmiPanelMap.py | python 3 | The main display panel |
| 6 | hmiMgr.py | python 3 | Display information manager module. |
| 7 | hmiEmuRun.py | python 3 | Main HMI user interface. |
Libraries required code base: https://github.com/LiuYuancheng/Metro_emulator/tree/main/src/lib
-
wxPython : https://docs.wxpython.org/index.html
Install: pip install wxPython
OS : Microsoft windows 10/11 home
Display mode:
- Display output: Yes
- Display resolution: 1920 x 1080
- Display orientation: Landscape
Network interface requirement:
- NIC number: 1
- RDP: enable
- NIC 1: IP address: 10.0.10.100, gateway: 10.0.10.1
Open config file scadaHMIConfig.txt, if you want to run this program individually, set the test mode flag TEST_MD to True. If you want to connect to other modules such as the PLCs, please set the flag to False.
After follow the instruction in the file trainHMIConfig.txt to setup all the parameters, you can run the program:
python hmiEmuRun.py
or double click the file runTrainsCtrlHMI.bat
Please to refer to the Railway System SCADA HMI User Manual to check the detail usage for all the functions. Below are some of the usage functions:
The station docking senor will be triggered and station signal will change to block state with below steps when a train is trying to dock in station:
Refer to doc/ProblemAndSolution.md
last edit by LiuYuancheng ([email protected]) by 28/07/2023 if you have any problem, please send me a message.