A new algorithm for connecting between LOGO and ...

A new algorithm for connecting between LOGO and labview software Maziar Fallahnejad,Hossein Pasandideh 

Abstract—One of the levels of automation pyramid is monitoring level. Today makers of industrial controllers such as PLC or DCS, usually create monitoring for large industrial controllers with hardware modules by HMI card. For small industrial controllers such as miniPLC or ARM, this ability has not been created. For example, siemens cooperation for MiniPLC-LOGO only has been developed one text display to market and there wasn't capability of monitoring. By regarding that for low I/O, the use of MiniPLC is not expensive, so we use monitoring system for automation of a process.In this paper for the first time by using of an algorithm in labview software, all data have been received in HEX form and after that by decoding of information, all inputs and outputs have been monitored. Results of this research have been applied for SINTECH KHAZAR electro-motor making cooperation.

I. INTRODUCTION

I

ndustrial automation systems have always had more important role in engineering and technical world, so they are used in control and monitoring of industrial processes. Industrial automation is a combination of different programmable logical controllers and human-machine interface. The purpose of using HMI systems in process control is creation of graphical interface for showing of operation and situation of the process, in a way that operator can arrange control parameters of system and can control machine's operation. One use of HMI for showing of alarms, machine situation, and turning on or off of system, monitoring and supervising of whole system. In these machines, in order to show and simulation of function and process of a system, user can use colors, images and different icons. Although, one can define access level for information of created pages. Use of these sets can decrease problems of low experienced operators. For performing of programs for this system, first we should use its software for creating the pages. Today, different softwares in industry are used to perform HMI systems such as Wincc,ProTool,Labview etc, that Wincc,ProTool software are for simenes cooperation and labview belong to national instrument cooperation,America. Labview software is one of the most powerful software in application programming and it is a software that its language is one level higher than all programming languages in world. It is specially written for laboratory and industrial works and also this software can be M. F.Technical and vocational junior college of Astaneh Ashrafeih, Technical and vocational university: (phone: +981424222755; e-mail: M_Fallahnejad@ ieee.og). H.P.The higher education institute of mehrastan,B.S student in electrical engineering.

connected with deffierent softwares such as C and Matlab. The power of this software in complex calculations of mathematic and hardware connections are in a way that we must confess most laboratory and military tools that are expensive and the header of software technology of them is labview ,such as Magtrol set etc[1]. This software is a powerful software and it can be used for analyzing of measuring systems. Hardwares of national instrument cooperation are very expensive and power of buying and using of them is only for very large and expensive project. This software can be connected with the hardwares of industrial as follows: 1- By cards of national instrument cooperation, DAC and analogue and digital cards. 2- By GPIB cards and serial port 3- By different PLCs. NIPAC technology can optimum existed automation system by basic control system such as PLC. NIPAC can be used as a software package of labview. Labview and PACs can be added to an industrial system. This connection in labview are from ways such as industrial networks such as OLE,Modbus TCP,DeviceNet,CAN,Profibus by using of OPC. There are 3 ways for connection of labview and PLC: 1- By using analogue and digital input/output module made in national instrument cooperation. 2- By using industrial networks 3- By using OPC with Labview DSC.[2] In this article performing algorithm written in labview software can monitor one LOGO to 24 digital input, 16 digital output and 8 analogue input and made an information bank text and the second algorithm can read and monitor all the process in network. This work has been used in control of heat of a motor by mini PLC LOGO and monitoring of that is by labview software in SINTECH KHAZAR electro motor making cooperation. After this introduction, in the second part we describe this industrial process. Part 3 is shown the architectural relation of VISA with LOGO. In part4 ,the way of performing is described. At last ,the results have been shown. II. INDUSTRIAL PROCESS DESCRIPTION In

most

large and

small

household vehicles

or

motormaking, life test of electrical motors or productions that have electrical motors such as universal motors, like electrical broom, mincer etc, or asynchronous motors such as fan for surveying of optimum age of motor and functional

test of the production and for seeing that motor is good or

users program are related to all variables of service by VISA

not, by some vehicles they test motor continuously and

that before this, LOGO should be configured from hardware

every motor has a special rhythm for turning on and off or

point. Settings of that are in some stages such as the kind of

left wise or right wise or measuring motor heat in testing that

connection port(com), kind of code for realizing of error,

in some tests they have different operations. It should be said

retrieving

that because motors should be turned on for hours and days

process[6],[7]. Following figures are hardware figure of

in test of life and the test should not stop to do it correctly,

analogue and digital signals.

rate and kind and input-output addresses of

so security of the vehicle from the point of having good control and alarm system is very important[3],[4],[5]. In created system by controlling of the process by a mini LOGO PLC that has been done by written program, user can see motors' heat simultaneously and compare heat graph of different canals of motors and also see this process in network. In this system, we use monitoring method with LOGO for the first time and also different canals' temperature and operation of motors have been monitored. And by the second algorithm one can monitor the process and correct function of vehicle by local network and also from internet. This project has been done for KHAZAR SINTECH electro

Fig.2.Hardware figure of analogue and digital signals in labview software.

motor making cooperation that is the producer of household vehicles in Iran and it is being used . In the following, the diagram block of this process has been shown.

Fig.1.Diagram block of process.

III. VISA ARCHITECTURE The architecture of VISA software, is the under layer of functions in VIs for labview. VISA is a high level API that performs a low level recalling. One can use VISA for controlling of vehicles such as VXI,GPIB, serial port and instruments that are active by computer. The main purpose of VISA is giving complete software in all levels, flexible and standard for working in automation industry. By making standards of interfaces between industrial softwares, all

Fig.3.Hardware figure of analogue and digital signals in labview software.

IV. CASE STUDY After performing software and hardware settings and having required connections, input and output data can be received in labview environment. After having known the

REFERENCES [1] [2]

number of data in known time span and performing of them, we will access those modules. LOGO is a hardware that can

[3]

not do monitoring on a computer and relation with miniPLC LOGO can't be done by labview and in this essay for the first time by programming with labview software, we have

[4]

shown this. Here all information is in HEX form, then by decoding the information and doing some ways we can monitor all inputs and outputs. Also, the changes of motor heat as curve in excel have been shown in the following figure.

[5] [6]

[7]

Fig.4. The changes of motor heat in excel software.

Fig.5. The monitoring on a computer by labview software and connection with miniPLC LOGO.

Vento, J.A., “Application of LabVIEW in higher education laboratories”, Frontiers in Education Conference, Digital Object Identifier: 10.1109/FIE.1988.35023, Austin, TX, USA, July 08, 2002. W. T. Thomson : "A Review of On-Line Condition Monitoring Techniques for Three-Phase Squirrel-Cage Induction Motors -Past Present and Future" Keynote address at IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, Gijon, Spain, pp 3-18 Sept. 1999. Olden, P. Robinson, K. Tanner, K. Wilson, R. Basher, A.M.H., “Open-loop motor speed control with LabView,” SoutheastCon 2001. Proceedings, ISBN: 0-7803-6748-0, Digital Object Identifier:10.1109/SECON.2001.923126, 30 March-1 April 2001, South Carolina Univ., Columbia, SC, USA. R. A. Jabbar, Azah Mohamed, M. A. Hannan, Muhammad Junaid, M. Mansoor, A.Latif and H. Noor, “Simulation of Electrical Machines Laboratory Using LabVIEW” International Conference on Computer, Electrical, and Systems Science, and Engineering (ICCESSE 2010), World Academy of Science Engineering and Technology (WASET), ISSN: 2070-3740 & ISSN: 2070-3724, Cape Town, South Africa, January 29-31, 2010. M. Usama Sardar, “Synchronous Generator Simulation Using LabVIEW”, Proceedings of World Academy of Science, Engineering & Technology (WASET), ISSN 1307-6884, Volume 29, May 2008. Maziar Fallahnejad, Seyyed Amin Hosseini, “control and monitoring simultaneously for a half-industial process by labview software and AVR micro-controller”. The second international conference of industrial automation, Sharif industrial university pages 257 to 259, 22 and 23 of February ,2011 Maziar Fallahnejad, Seyyed Amin Hosseini, “survey of labview software ability in monitoring of half-industrial processes”. The first computer engineering and IT conference Islamic Azad University of Roudsar, pages 125 to 127, 26th of May , 2011