Microprocessor-compatible control

Each of the processes (blown film, sheet, tube, etc.) contains secondary equipment applicable to their specific product lines such as computerized fluid chillers and temperature control systems. Equipment has become more energy-efficient, reliable, and cost-effective. The application of microprocessor and computer compatible controls that can communicate within the extruder line results in the more accurate control of the line. 

Chiron provides a microwell plate heater, a luminometer, and data management software. The plate heater is specially designed to provide precise control of the hybridization temperature (0 0.5°C) and to distribute heat evenly throughout the microwell plate. The luminometer maintains a temperature of 37°C and accommodates the 96-well plates. The data management software runs on an IBM PC or compatible computer with a minimum of 80386,16-Mhz microprocessor, 2 Mb of RAM, monitor, mouse, compatible printer, MS DOS (version 5.0 or greater), and Windows (version 3.1 or greater). 

Home and Office—Heat and humidity control D (>108 units in place in United States) 1000 Need low-cost sensors compatible with central microprocessor control... 

Four main units are used in the IMCS, which are the motor control unit (MCU), the feeder control unit (FCU), the circuit breaker control unit (CBCU) and the central control unit (CCU). A MCU is a microprocessor (micro-computer) based module which has integrated control, monitoring, protection functions, and a communication interface for the motor starter. An FCU is very similar to a MCU and interfaces communication for the plain feeder contactor or circuit breaker. A CBCU is also similar to a MCU but is used for incomers, interconnectors and busbar section circuit breakers. A CCU provides the facility to communicate simultaneously with MCUs, FCUs, CBCU, a distributed control system (DCS), system control and data acquisition (SCADA) and other digital information systems. Other discrete devices such as special protective relays can also be addressed by the CCU provided the software and porting systems are compatible. 

The rapid development of microprocessor technology has made distributed control possible and attractive. The use of reliable communication between a large number of individual controllers, each responsible for its own tasks rather than for the complete operation, improves the response of the total system. We can take PLC-based control as a typical example of central control system and LonWorks, developed by Echelon, as an example of distributed control system. In Lon Works, each automated device is controlled by a control module—LTM-IO (Figure 8). The control modules are connected on a LonTalk network that provides an ISO/OSI compatible protocol for communication. 

D/A converter ICs often include special features that enable them to be interfaced easily to microprocessors or other systems. Microprocessor control inputs, input latches, buffers, input registers, and compatibility to standard logic families are features that are readily available in D/A ICs. In addition, the ICs usually have laser-trimmed precision resistors to eliminate the need for user trimming to achieve... 

CAMAG Automatic TLC Sampler III (Figure 18) IBM compatible microprocessor controlled automatic TLC spotter for up to 16 samples applied in spots or bands. 

A/D converter or to transmit some control bytes per every transmitting cycle. From this it is clear, that the transfer speed 19200 bauds are sufficient and we may use the microprocessor with only one RS-232 compatible interface. 

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