1. CONTROL SYSTEM WITH LABVIEW
International Conference
AUTOMATICS’2015,FA
5-7 June, Sozopol, Bulgaria
CONTROL SYSTEM WITH LABVIEW
Albena Taneva, Robert Kazala, Ivan Ganchev, Michail Petrov
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Technical University - Sofia
Plovdiv branch

2. Overview
This paper is focused on process visualization with virtual instruments.
Modern control systems - all devices are network connected
Different PLCs are connected using client-server model.
The goal is focused on NI OPC Server and LabVIEW
Developed project is related to the laboratory equipment
The test and verification are made. The advantages of the proposed SCADA project are given.
Give a brief overview of the presentation. Describe the major focus of the presentation and why it is important.
Introduce each of the major topics.
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3. Survey
Section 2 is devoted to the configuration and description of the client-server networked systems;
Section 3 describes laboratory equipment, including Siemens tank set up;
Section 4 shows the developed LabVIEW project for monitoring and control
Some results for data exchanging and conclusions are given in the Sections 5 and 6.

4. Introduction
One of the most rapidly growing area in industry is related to the communications and devices
Networked Control Systems (NCSs) have recently gained the attention of the industry since they are flexible and re-usable
This article is devoted on design using LabVIEW virtual instruments (VI)
VI work with a variety of hardware and software and can integrate into virtually any system
Here is presented a solution applicable to the industrial control systems
The OPC server with the LabVIEW environment to build effective systems data exchange between controllers using different protocols are used
This is another option for an Overview slides using transitions.

5. Description To gather information from different PLCs in one software
is not solved task in general
It has to configure and design a network with different devices using different communication protocols.
This is another option for an Overview slides using transitions.

6. Description, Requirements
Different controllers have to be joined in a network for monitoring.
A way for monitoring and control,
could be use in real industrial application
with networked devices,
which are conduct separates controlling tasks
In order to use one software instruments
it can reduce costs and achieve requirements of a SCADA project !!!
This is another option for an Overview slides using transitions.

7. Description The idea in general Fig.1. Client-server PLCs network
OPC Client
S7 313
OPC Server
This is another option for an Overview slides using transitions.
Fig.1. Client-server PLCs network

8. Solution with LabVIEW
Flexible solution for data exchange between controllers using different protocols is the use of the OPC server with the LabVIEW environment
The combination of NI OPC Servers and LabVIEW provides a single platform for delivering high-performance measurements and control to industrial systems
There are many OPC servers
A very suitable for educational purposes is NI OPC Server, National Instruments [9],
evaluation version with limited execution time [10]
Proper configuration is done in few steps

9. Solution with LabVIEW Running the Server Starting a New Project
Adding and Configuring a Channel
Adding and Configuring a Device
Adding User-Defined Tags
and Tag Scaling
Saving the Project
Fig.2 NI OPC Server project setups

10. Advantages Flexible solutions Data exchange using different protocols
Allows remote process control and visualization
Convert proprietary industrial protocols to the open OPC Classic and OPC Unified Architecture (UA) protocols
It enables NI LabVIEW software to communicate to many different programmable logic controllers (PLCs) and third-party devices through the OPC Client that is included with the LabVIEW
Datalogging and Supervisory Control (DSC) Module
Provides a single platform for delivering high-performance measurements and control to industrial systems

11. Fig.3 OPC Quick Client window and setups for controllers (clients).
Solution with clients-server
To testing the server operability the OPC Quick Client is used. The relevant variables for Pressure and Temperature transmitters, noted as PT1, PT2 and TT1 are defined, fig.3. Software allows to view and modify values for selected tags configured in the OPC server (fig.8). It is done for each PLC variables. In the developed project are connected different controllers, fig.1,7. In this way are connected devices as clients in a client’s project. Ones configured and created do not need to repeat this at start.
Fig.3 OPC Quick Client window and setups for controllers (clients).
To testing the server operability the OPC Quick Client is used.
Variables: Pressure and Temperature transmitters, noted as PT1, PT2 and TT1
In this way are connected devices as clients in a client’s project.
Ones configured and created do not need to repeat this at start.

12. LabVIEW project In this work LabVIEW project is developed
The DSC Module as a part of LabVIEW, is used (Datalogging and Supervisory Control)
It provides supervisory control of variety of distributed systems using graphical LabVIEW programming.
This Module extends the LabVIEW environment with additional functionality for rapid development of distributed measurement, control and monitoring applications.
You can
log data automatically,
add alarming, scaling
security to the shared variables
configure the shared variable programmatically.
provides tools for graphing historical or real-time trends
writing custom I/O servers
can read or write to OLE for Process Control (OPC) connections
Modbus PLC, Experimental Physics and Industrial Control System (EPICS) Client and Server I/O servers, or custom I/O servers that you write.

13. Laboratory set up LabVIEW project
Fig.4. Overall structure and P&I diagram of the laboratory control system

14. Fig. 6. Explorer, Panel and Block diagram of the developed project.
LabVIEW project
The Explorer, Block and Panel diagram are presented on the fig.6 for the one client project.
Fig. 6. Explorer, Panel and Block diagram of the developed project.

15. Networked Laboratory system
Fig.7. The scheme with additional controllers (OPC clients) in laboratory network.

16. Solution with clients-server
Fig.8. The scheme with additional controllers (OPC clients) in laboratory network

17. Laboratory set up
Compressed
air supply
Fig.9. Overall structure and photo of the laboratory control system

18. Laboratory set up
Compressed
air supply
Fig.10. Overall structure and photo of the laboratory control system

19. Laboratory set up
Fig.11. Overall structure and photo of the laboratory control system

20. LabVIEW project Fig.12. The main screens
Pneumatic system (LabVIEW model) connected to Omron CJ1M PLC
Traffic ligthts connected to the CP1H PLC (LabVIEW system model)

21. Investigations and Results
Several experiments are performed using data exchange in the frame of the developed project.
The information transferred between networked devices is observed in the NI server and client’s environment.
It was tested the LabVIEW project for monitoring and control of the I/O elements.
On the previous fig.3, 8 the verification data exchanging related to the each used variables can be observed.
The OPC quick client windows are used to demonstrate the “good” quality of each system signals.
Hence can assume the verification and performances of the control system are achieved and satisfied.

22. Microsoft Engineering Excellence
Conclusions
Microsoft Engineering Excellence
VI represent a fundamental shift from traditional hardware-centered instrumentation systems to software-centered systems
Some assets of using VI are related to the:
saving SCADA software company;
saving wiring using exist laboratory Intranet;
value inputting and changing in the PLC (set value, outputs, internal relays) via LabVIEW project.
Thus projects can be developed and added more controllers having separate control tasks in NCS.
It is possible to develop and enhance effective factory monitoring and control SCADA system.
There is no standard solution for communication between any sever and any PLC.
This can be viewed as a disadvantage.
The developed hybrid LabVIEW can be improved and used in industrial environment.
If there is relevant video content, such as a case study video, demo of a product, or other training materials, include it in the presentation as well.
Microsoft Confidential

23. Microsoft Engineering Excellence
Conclusions
Microsoft Engineering Excellence
The laboratory NCS with client-server connection was developed and demonstrated.
The solution presented in this paper allows accessing different PLCs
The real time verifications ware conduct.
The obtained results show good performance of the project and applicability for other cases.
The base of client-server communication and case study in laboratory education on Control Systems Department could be viewed as advantage in the work.
Thus projects can be developed and added more controllers having separate control tasks in NCS.
Furthermore NCS is very fruitful and promising research area. Future work can be focused on archiving, network and data security for the developed networked laboratory system.
If there is relevant video content, such as a case study video, demo of a product, or other training materials, include it in the presentation as well.
Microsoft Confidential

24. Thank you for your attention
Add a case study or class simulation to encourage discussion and apply lessons.
Would like to acknowledge
Ministry of Education and Science of Bulgaria,
Research Fund Project No: DFNI-I02/6/2014
Control Systems Department, Technical University Sofia, Branch Plovdiv