scholarly journals An Approach to Oobtain a PLC Program from a DEVS Model

10.5772/7897 ◽  
2009 ◽  
Author(s):  
Hyeong T. ◽  
Kil Y. ◽  
Suraj Dangol ◽  
Gi N. ◽  
Sang C.
Keyword(s):  
Plc Program

Greenhouse Moisture and Temperature Fuzzy Control System and PLC Program Design

2014 ◽  
Vol 721 ◽  
pp. 265-268
Author(s):  
Mao Qi Huang ◽  
Jian Hong Ke ◽  
Xiao Long Wu
Keyword(s):  
Complex System ◽  
Control System ◽  
Fuzzy Control ◽  
Control Program ◽  
Control Effect ◽  
Math Model ◽  
Fuzzy Control System ◽  
Temperature Controller ◽  
Plc Program ◽  
And Control

Greenhouse environment system is an often nonlinear, change and inertia complex system. It is very hard to build math model and control. Since moisture and temperature have a influence to crops grow, we select them to build the manner of control system, applying fuzzy control system to design moisture and temperature controller, and to write fuzzy control program based PLC, then we should observe the factual control effect. The result of system running show: when temperature is set to 25oC and moisture is 80%RH, the process of control is stable and the system is very stable, it can meet the greenhouse requirement.

Study on Electrical Control System of X62W Milling Machine Based on PLC

2015 ◽  
Vol 713-715 ◽  
pp. 863-866
Author(s):  
Guang Yue Yang ◽  
San Peng Deng ◽  
Yu Ming Qi
Keyword(s):  
Control System ◽  
Production Process ◽  
Experimental Results ◽  
Milling Machine ◽  
Continuous Development ◽  
Electrical Control ◽  
Plc Program

With the continuous development of milling machine, the normal milling machine was not suitable with modern processing. In order to adapt to the requirements of modern production process and quality, the electrical control system of milling machine need be improved. The electrical control system and circuit of X62W milling machine is analyzed and designed. The PLC program is compiled. All of it is proved to be reasonably and feasibly based on the experimental results.

scholarly journals Implications of Commodity Programs and Crop Insurance Policies for Wheat Producers

2019 ◽  
Vol 51 (02) ◽  
pp. 267-285 ◽  
Author(s):  
Jeff Luckstead ◽  
Stephen Devadoss
Keyword(s):  
Prospect Theory ◽  
Crop Insurance ◽  
Cumulative Prospect Theory ◽  
Certainty Equivalent ◽  
Coverage Level ◽  
Insurance Policies ◽  
Agriculture Risk ◽  
Commodity Programs ◽  
Plc Program ◽  
Risk Coverage

AbstractWe analyze the effects of Price Loss Coverage (PLC), Agriculture Risk Coverage (ARC), individual revenue protection insurance (RP), and Supplemental Coverage Option (SCO) on the RP coverage level, certainty equivalent, and program payments. The model is calibrated to a representative wheat farm in Mitchell County in Kansas to analyze the effects of various policies. The result highlights that when insurance is framed as an investment, cumulative prospect theory predicts farmers’ coverage decisions accurately at 70%. ARC or PLC program increases the RP coverage level to 75%, but PLC and SCO jointly decrease the RP coverage level to 70%.

The Construction of Remote Online Access to PLC Laboratory Based on Internet

2015 ◽  
Vol 734 ◽  
pp. 194-197
Author(s):  
You De Ruan
Keyword(s):  
Network Topology ◽  
Data Security ◽  
Online Monitoring ◽  
The Internet ◽  
Transfer Data ◽  
Communication Method ◽  
Online Access ◽  
Plc Program ◽  
Security Communication

This paper describes the construction of remote online access to PLC Laboratory based on Internet .The Laboratory apply industrial communication modules, relay on the powerful ommunications capabilities of Siemens PLC , transfer data by the Internet. The PLC of the Laboratory can be accessed by remote PC. The remote PC possible upload and download PLC program, online diagnosis, online monitoring, etc; and directly observed action of PLC by video, determine equipment movement is whether correct or error. The paper introduces the network topology, various functions and data security communication method of the system.

Development of PCBs Functional Tester with Relay Matrix Network

2013 ◽  
Vol 336-338 ◽  
pp. 76-79 ◽  
Author(s):  
Ming Zhu Zhang ◽  
Huai Qun Wang ◽  
Yi Min Chen
Keyword(s):  
Control Mode ◽  
Complex Test ◽  
Flexible Connections ◽  
Plc Program ◽  
Mode A ◽  
Program Changes

This paper presents the development of the PCBs functional tester and the application of matrix relay in this system. It is stressed on the structure of relay matrix switch and its basic control mode. A topology of cascaded relay switch network is also proposed. The relay matrix in switch networks can achieve flexible connections of I/O pins on the specific PCBs being tested with varies signal resources and output processing modules without any hardware changes in the different test flows, only by PLC program changes. Therefore, complex test wiring can be saved when interface varied, as well as the enhancement of systematic universality. .

Research on Multi-Speed Control of Variable-Frequency Drive

2014 ◽  
Vol 538 ◽  
pp. 425-428
Author(s):  
Xiao Na Song
Keyword(s):  
Previous Experiment ◽  
Speed Control ◽  
Variable Frequency ◽  
Variable Speed ◽  
Variable Frequency Drive ◽  
Experimental Teaching ◽  
Three Phase ◽  
Speed Mode ◽  
Plc Program

This paper introduces a noval experimental teaching project. Different from previous experiment, in this project, three-phase motor can operate at multi-speed mode or continuously variable speed mode controlled by PLC and VFD. The obvious characteristic of the experiment is that the VFD is controlled by PLC automatically. The configuration of the experiment including hardware and software is introduced in detail. The results of the execuation of the PLC program reveals that three-phase motor can operate in two modes according to the instructions from PLC. In addition, the speed can be changed with the corresponding parameters seting. Therefore, the knowledge of PLC and VFD are combined in one teaching project, through which student can master more practical technique. The work of this paper is significant for improving the students’ comprehensive capability.

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