SCADA Question&Answers

1. What is the full form of SCADA?                                   

 >Supervisory control and Data Acquisition

2. What are the common system components of SCADA system?   

Remote terminal units
PLC
Telemetry system
Data acquisition server
HMI
Historian software
Supervisory system
Communication infrastructure
Process and analytical instrumentation

3. What is RTU?    

Full form of RTU is remote terminal unit. Remote terminal units connects sensors in the process control and convert sensor signal to digital data.

4. Different communication protocols used in SCADA communication?

Ethernet
Modbus
VSAT(Very Small Aperture Terminal).

5. What are some different levels of SCADA machines and systems?    

SCADA machines have several different forms. You can have field level devices such as sensors. You can have remote terminal units (RTUs), a main controller or “master station,” or you can have a simple computer system interface that displays data for the user.

6. Why do companies use SCADA?

SCADA is a methodology that defines performance and protection of data for the plant or   communication center. It helps improve productivity for employees and helps the economy save energy.

7. What voltage does an RTU operate with? 

 Remote terminal unit operates at 110V/240V.

8.Why would a company want to use a PLC over an RTU? 
A programmable logic controller (PLC) is much cheaper and more flexible with programming. PLCs have been replacing RTUs because they are also easier to troubleshoot and have more sophisticated controls than RTUs.

9. What is an HMI  

An HMI (human machine interface) is the system that connects to a SCADA database that displays data for the user. The HMI allows the operator to review diagnostic data and trending graphs.

10. What is a DDE?                                                                                                

DDE the acronym for dynamic data exchange. DDE provides a communication protocol that allows devices to send and receive communication signals. This protocol was developed by Microsoft, so if the shop is a Microsoft shop, you will probably need to know some things about DDE and how devices communicate.

12. What are some advantages of SCADA over other protocols?

SCADA allows users to create object-oriented graphs, they can offer trending graphs to review data in real-time. SCADA also deals with big data, so you can develop a database system that displays trends over a number of years. This allows the business quick access to important data that can be used for future growth and enhancements.

 

13: How does SCADA handle data?

SCADA systems gather data and send them to a central machine that processes the data. The SCADA software is used to manage the data and display it to the user. SCADA also logs information about who runs reports and the data that is used.

14. How does SCADA handle issues?

SCADA has an alarm or alert system that interfaces with personnel to send them a warning when a system is not working properly.

15: What is the “Historian” in SCADA?
The historian is the name given to the software service that collects events and logs them into the database for future use.

16. Using which option you assign and control users' access rights for configuration and runtime.

User administrator

17. Which Runtime application is used in Automation Lab?

WINCC runtime Advanced

18. Which option is used for data logging in SCADA?

Historical Log

19. Define the tree views of Runtime advanced Configuration window in TIA Portal.

Topology view

Network view

Device view

20. Write the basic objects of Runtime advanced application in TIA Portal.

Line, Square, Polygon, Ellipse, Text field, Graphics field etc.

21. Write the Elements used in Runtime advanced application in TIA Portal.

IO field, Buttons, symbolic I/O field, Graphic I/O field, date Time field, bar, switch, Symbol Library, Slider, Gauge, Clock etc.

22. Write the Controls used in Runtime advanced application in TIA Portal.

Alarm view, Trend view, user view, HTML Browser, Status/force bar, smart Client view switch, Recipe View(x) Trend view, System diagnostic view, PDF view etc.

23. Methods of Alarms or Types of Alarms

User defined Alarms methods:-

User Alarms: - HMI system triggers an alarm when there is operator activity in the HMI system.

Discrete alarms:-HMI system triggers an alarm when a certain bit is set on the controller.

Analog alarms:-HMI system triggers an alarm when a tag violates a set limit value.

Controller alarm(alarm number method):-The user program on the controller sends an alarm frame to the HMI device that then triggers the relevant alarm.
(AlarmD, AlarmS, Alarm8…)

System defined Alarms:-

System Alarms

24.Prefered Alarm Classes

Diagnostics alarms:-
® error / diagnostics alarms of the controller® are generated by the connected controller

Error:- (freely available)® for discrete or analog alarms requiring acknowledgment

System:- (freely available)® are generated by the HMI system

Warnings:- (can be used freely)® for discrete/analog alarms not requiring acknowledgment

25. Using which option you assign and control users' access rights for configuration and runtime?

(A) Alarms    (B) Data logging (C) Trend   (D) User administrator

26. Which Runtime application is used in Siemens SCADA?

(A)WINCC runtime Professional (B) WINCC Flexible (C) WINCC client (D) WINCC runtime Advanced

27. Which option is used for data logging in SCADA?  

(A)Historical data (B) Alarm Log (C) Log (D) History Log

28. Write the event name for ON/OFF switch  

(A) WINCC       B) runtime   C) invert bit   D) stop runtime  

29. Which is not an alarm type 

A) System Alarm     B) Controller Alarm   C) Analog alarm  D) Data log alarm

30. From following options which is not a data type 

A) System      B) Bool      C) Word       D) Real

31. From following options which is a suitable for discrete alarm   

 (A) Pressure         B) Temperature            C) Trip command        D) Flow

 

32. From following option which property is used for on/off switch?   

(A) Set bit                B) press bit           C) Invert bit      D) log

  

33. From following which option which option is used to set screen 
resolution?   

(A) Runtime setting   B) set resolution C) resolution    D) Screen Size

34. From following which view is used for showing alarms on screen? 

(A) User view            B) Alarm view   C) Data log      D) system 

35. Which function property is used for push button in SCADA  
(A) Press                  B) Release           C) Invert          D) Press &release

36. From following which PLC is S7-1200 family          
(A) KTP600            B) CPU1214AC/DC/RLY        C) TP 700             D) s7-300            

37. From following which communication card is used for SCADA configure?           

(A) IE General        B) CP 123          C) CP3014                   D) CP4324

38. Full form of DDE? 

Dynamic Data Exchange

39. Full form of MMI?  

Man Machine Interface

39. Full form of HMI?   

Human Machine Interface

40. Full form of RTU? 

Remote Terminal Units