نتایج جستجو برای: plc s7 1200
تعداد نتایج: 18910 فیلتر نتایج به سال:
Intersubspecific hybrid sterility is a common form of reproductive isolation in rice (Oryza sativa L.), which significantly hampers the utilization of heterosis between indica and japonica varieties. Here, we elucidated the mechanism of S7, which specially causes Aus-japonica/indica hybrid female sterility, through cytological and genetic analysis, map-based cloning, and transformation experime...
An Implementation of a Teleoperated Robot Control Architecture on a Plc and Field-bus Based Platform
Teleoperated robots are used to perform hazardous tasks that human operators cannot carry out. The purpose of this paper is to present a new architecture (ACROSET) for the development of these systems that takes into account the current advances in robotic architectures while adopting the component-oriented approach. ACROSET provides a common framework for developing this kind of robotized syst...
In the sewage treatment system, the dissolved oxygen concentration control, due to its nonlinear, time-varying, large time delay and uncertainty, is difficult to establish the exact mathematical model. While the conventional PID controller only works with good linear not far from its operating point, it is difficult to realize the system control when the operating point far off. To solve the ab...
With the increasing threat of sophisticated attacks on critical infrastructures, it is vital that forensic investigations take place immediately following a security incident. This paper presents an existing SCADA forensic process model and proposes a structured SCADA forensic process model to carry out a forensic investigations. A discussion on the limitations of using traditional forensic inv...
The principal aim of the paper is to present a possible approach to the design of simple Proportional-Integral (PI) robust controllers and subsequently to demonstrate their applicability during control of a laboratory model with uncertain parameters through the Programmable Logic Controller (PLC) SIMATIC S7-300 by Siemens Company. The proposed and utilized synthesis consists of two steps. The f...
Protein S7 from the small subunit of Escherichia coli ribosomes interacts specifically with the 16 S RNA (reviewed in reference [ 1 ] ) and it has been shown that binding occurs near the 3’-end of the 16 S RNA [2-41. Protein S7 can be cross-linked to 16 S RNA by ultraviolet irradiation of the small subunit [5]. From studies in which an in vitro complex between protein S7 and 16 S RNA was irradi...
The complete nucleotide sequences of rice black-streaked dwarf virus (RBSDV) genome segments 8 (S8) and 7 (S7) were determined, and were found to have high sequence identities to the corresponding maize rough dwarf virus (MRDV) genome segments. RBSDV S8 and S7 consisted of 1927 and 2193 nucleotides, respectively. RBSDV S8 had a single long open reading frame (ORF) encoding 591 amino acids. RBSD...
This paper presents a practical network platform to design and implement a networked-based cascade control system linking a Smar Foundation Fieldbus (FF) controller (DFI-302) and a Siemens programmable logic controller (PLC-S7-315-2DP) through Industrial Ethernet to a laboratory pilot plant. In the presented network configuration, the Smar OPC tag browser and Siemens WinCC OPC Channel provide t...
Ribosomal protein S7 from Escherichia coli binds to the lower half of the 3' major domain of 16S rRNA and initiates its folding. It also binds to its own mRNA, the str mRNA, and represses its translation. Using filter binding assays, we show in this study that the same mutations that interfere with S7 binding to 16S rRNA also weaken its affinity for its mRNA. This suggests that the same protein...
In cable production, it is imperative to control speed and tension. This paper proposes a web tensile force regulation between input output pulling caterpillar devices. The controlled indirectly using PI controller based on feedback information about observer. also deals with the of input-pulling device torque (current) effect line temperature change at extruder zones. output-pulling devices ar...
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