Control Level

Control Level


any one of the relative gradations of sets of control elements in an integrated system, grouped and separated according to the hierarchical principle of control. The control elements of various levels are interconnected and strictly subordinated.

In hierarchical control systems, each subdivision, or subsystem, solves only problems of its own level; the original information for decision-making and developing control signals is transmitted from lower to higher levels, and the control information or signal is transmitted from higher to lower levels. In a digital computer, for example, the operation of the individual units, such as memories, printers, and the like, is coordinated according to the specific computer program by a central unit, in which one link is the computer’s control console (at the highest control level). Local controls (at the lowest control level) are commanded by the central control unit; they generate signals to execute individual operations according to their own operating algorithm, and the aggregate of these operations constitutes the computational process.

In automated production control systems, the automatic controllers that control actuating mechanisms and machine functions, together with the measuring transducers (sensors) that monitor the progress of the production process, constitute the lowest control level. Monitoring and measuring information from the sensors is fed to a dispatcher’s control panel or to a control computer (the highest level), which evaluates the accuracy with which operations are being executed and then generates commands to be fed to elements at the lowest control level. In more complex systems, such as automated control systems for an industry branch or an enterprise or integrated power grids, there may be three or more separate control levels.

The separation of control functions by control level in integrated systems makes it possible to restrict the range of problems solved by each subdivision, regulate the distribution of information among control elements, simplify accounting and reduce the number of documents required, and improve the quality of decisions made.

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A monoclonal anti unit, bottle of 10 ml,anti monoclonal b, unit 10 ml bottle,anti monoclonal rh, unit 10 ml bottle,cleaner for semi-automated equipment hematology (active components: enzymes, sodium and potassium salts, surfactants and preservatives, coloring agents), litro,quality control level 1 or low, so team chemistry semi-automated liquid.
The two-day conference aims at highlighting the role and importance of communications, the leadership and control level in enhancing traffic safety.
Proposed in this chapter is a concept of an advanced hierarchical control system particularly dealing with the structure of the strategic control level for the industrial robots able to deal with assembly as well as robotized machining.
The compact, single point ultrasonic controllers continuously monitor and control level in liquids, solids, or slurry applications for a wide range of industries.
The Ethernet communications protocol enables a continuous infrastructure between the main, control level and the process level.
Certficates for Failure Mode and Effects Analysis went to Michael Daly, Roger Eaton and Rob Stevens along with Ashik Miah, Tom Kilmartin and Paul Fuller who were also each awarded a certificate for Statistical Process Control Level Two with Muhammad Ali, Daniel Prust, Richard Stone, Andrew Smith, Darren Pillinger, John Scott, John Hickey, Matthew Dyke and John Handley.
Growing concern for cybersecurity threats, NERC standards and the recently signed energy bill are driving companies responsible for critical infrastructure to implement greater levels of network security at the real-time control level.
In my experience, when used at the normal pulp mill pitch control level of 10-15 lbs/ton, there are no negative effects to the papermaking process.
Insurers were united in their opposition to a proposal considered by NAIC's Property/Casualty Risk-Based Capital Task Force Ad Hoc Subgroup to increase the minimum level of the authorized control level of risk-based capital requirements from 50 percent to 75 percent.
5 and AP224 standards are elongated to fit in more than one control level to indicate that they are used to support information exchanges in multiple levels of the control hierarchy.
This control level generally requires control equipment with capabilities equal to Regenerative Thermal Oxidizers (RTO) of biofilters.
x] rule, the EPA had settled on a 70 percent control level for large IC engines after rejecting an 80 percent level as too high.