Thanks.

0_Einstein

I have not had to use Siemens SCADA but have used with Rockwell many years ago.

The difference - at least to me - is that SCADA is monitoring and controlling multiple PLCs, whereas an HMI typically controls and monitors a single PLC or at least a single set or grouping of PLCs.

SCADA might control multiple production lines, queueing up raw materials of the required product type (part #) to produce a given output product, as well as scheduling what lines and equipment within those lines need to change over, and so on.  It might contain recipe information that gets pushed to the PLCs as they are changed over (sometimes retooled and made ready for the new product).

If it were me, I would search for and test a sample Siemens SCADA application from this support site.  The documentation provided with the sample application would explain what the SCADA system on that sample is doing, which should give a better answer than what I just did since it's from Siemens.

s27

Hello there. I've used, designed and programmed a lot of HMIs before. But I've never spent time with SCADA.

According to this;

1. What is the difference between SCADA and HMI?

2. Do I have to go to PC systems to do Scada in TIA V16?

3. How do I transfer a fault information (eg a thermal ) to the scada? (It's better for me if you give me small examples)

I know maybe it's a clumsy question for many of you, but your simple help will bring great returns for me. Just like an avalanche.)

Thanks.

 

Hi,

 Thank you but I couldn't find any example about siemens. If you found it, can you show me? with link.

hi,

Traditionally when you build Scada with Siemens, you use PCS7 to control whole plant. Probably WinCC prof has those capabilities too, newer used though.

But you can make your own like Einstein said, It just monitors or controls more than one unit. I do not think it is a matter of one example but grasping the whole idea. 

There are machines in plant and you can see or some cases operate those from one place, it is scada at its simplest. There could be MES and ERP involved (Sorry could be Fnnish terms), recipes an such.

Hello!

No worries—your questions are definitely not clumsy. They're actually quite insightful, and I'll do my best to help guide you through them!

1.What is the difference between SCADA and HMI?

HMI (Human-Machine Interface) and SCADA (Supervisory Control and Data Acquisition) both deal with industrial automation, but they serve different purposes:

• HMI: It’s the interface that operators interact with to monitor and control machines or processes in real-time. It provides a graphical representation of equipment status, alarms, and real-time data. In essence, it’s the window that lets you interact directly with the process (like buttons, graphs, etc.).

• SCADA: SCADA, on the other hand, is a broader system that includes both the HMI but also involves supervisory control, data acquisition, and integration with databases, historians, and external systems for overall management of the process. SCADA typically involves more advanced features, like long-term data storage, analysis, and remote monitoring across larger networks or sites.

In simpler terms, HMI is a component of SCADA—it’s the user interface, while SCADA covers the full supervisory control and data acquisition framework.

2.Do I have to go to PC systems to do SCADA in TIA V16?

Yes, when you use TIA Portal V16for SCADA, you typically interface with a PC-based system running WinCC (Windows Control Centre). WinCC is Siemens' SCADA system that integrates with TIA Portal, which is used for designing and programming automation projects.

You will use the TIA Portal to configure and program the PLCs, and then you’ll utilize WinCC (installed on a PC or server) for SCADA functionality—this includes setting up the monitoring, alarms, reporting, and data storage. While basic HMIs can run on panels or embedded devices, SCADA systems in TIA Portal typically require a PC system for full functionality.

3.How do I transfer fault information (e.g., a thermal) to the SCADA?

To transfer fault information (like a thermal alarm or error condition) to a SCADA system, you'd typically use the following steps:

1. PLC Logic: Your PLC (using TIA Portal) will detect faults (like a thermal overload) through sensors or internal logic and generate an appropriate alarm or fault signal.

2. Tagging: You'll then configure these fault signals (e.g., "Thermal Overload") as tags in your PLC program. These tags represent specific pieces of information like the status of sensors, alarms, or variables that you want to monitor.

3. Communication: The PLC and the SCADA system need to be connected, often using industrial protocols such as OPC (OLE for Process Control) or Modbus/TCP. This enables data from the PLC to be sent to the SCADA system in real time.

4. Mapping in SCADA (WinCC): In the SCADA (WinCC), you’ll configure the corresponding variables(tags) that will receive the data from the PLC. This allows the SCADA to display fault information such as the thermal error on the screen and trigger alarm notifications.