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WinCC OA JavaScript Manager for Node.js
The WinCC OA JavaScript Manager for Node.js is a manager that allows for the integration of the TypeScript/JavaScript runtime environment Node.js® into WinCC OA.
Debugging of Node.js®

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- APIs
  An overview of the APIs (Application Programming Interface) available in WinCC OA.
- COM in WinCC OA
  COM stands for Component Object Model, a specification for developing modular software components which can be used by each COM compatible application. COM components can be easily integrated in such applications and can even be removed from an application at run time. COM components can be programmed in various different programming languages although C++ is used mostly. The specifications OLE, ActiveX and DirectX are based on the COM technology.
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- SIMATIC PLC Discovery
  In increasingly dynamic automation environments and the merging of IT with OT, the SIMATIC PLC Discovery can help with the connection of newly added S7/S7+ devices by showing you all the devices in the network
- WinCC OA JavaScript Manager for Node.js
  The WinCC OA JavaScript Manager for Node.js is a manager that allows for the integration of the TypeScript/JavaScript runtime environment Node.js® into WinCC OA.
- SIMATIC Unified AR (Augmented Reality)
  SIMATIC Unified AR is an industrial Augmented Reality app that allows to display and operate HMI screens (WinCC Unified) and web applications (WinCC OA Dashboard) in real production environments.
- HTTP Server
  The HTTP Server integrates Internet technologies directly into WinCC OA . Implemented as an add-on for the Control Manager, possible applications are many and diverse. The HTTP Server can be used as a web server for static HTML pages including download facility or to generate dynamic HTML pages.
- XML-RPC
  XML-RPC (Extensible Markup Language Remote Procedure Call) allows software on different operating systems to make procedure calls over the internet. XML-RPC uses HTTP for the transport and XML for the encoding. It sends the procedure call to a remote server through HTTP. The call is an XML document and it receives the response as XML.
- REST Reporting API
  The REST Reporting API is integrated into the Standard web server and can be activated via the config entry enabled in the [restReporting] section.
- Distributed systems
  Distributed systems in WinCC OA allow to connect two or more autonomous WinCC OA systems via a network.
- Dist-Management
  Configuring and maintaining a distributed system in WinCC OA requires a high amount of engineering effort due to a high number of settings and configuration steps that must be applied on several systems. The Dist-Management reduces the engineering effort and simplifies the necessary settings.
- XMPP
  XMPP (formerly Jabber) is mostly used in chat (instant messaging) applications and allows near real time communication between two or more parties. It can, e.g., be used to push information from a WinCC_OA project server to one or more persons, even allowing the recipient to send a confirmation back to the server.
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Debugging of Node.js®

In order to debug TypeScript/JavaScript code, the debugging mode of the WinCC OA JavaScript Manager for Node.js can be enabled by setting a manager option, which in turn enables an interface to attach to the manager by regular TypeScript/JavaScript debugging tools.

Activate Node.js® Debugging

Following steps must be performed to debug TypeScript-JavaScript:

Add the command line parameter --inspect to the WinCC OA JavaScript Manager for Node.js. This parameter is passed to Node.js® and must therefore be listed at the top of the parameters, see also Syntax Manager Options.
Restart the manager.
Open the debugging tool of your choice, for example: Google Chrome or Microsoft VS Code.
Connect to the node instance of the WinCC OA JavaScript Manager for Node.js

Google Chrome: Open the browser and enter the following URL in the address bar:
```
chrome://inspect
```
Within the opened page you can now select the desired Node instance, as well as using the link Open dedicated DevTools for Node to open an additional window with the debugging tools.

VS Code: Open the Command Palette (SHIFT + CTRL + P) and enter following command:
```
Debug: Attach to Node Process
```
You can then choose from a list of available instances on your computer to connect.