direct digital control การใช้

• This was possibly the first successful implementation of a distributed processing direct digital control system.
• Midac Systems, of Sydney, Australia, developed an objected-oriented distributed direct digital control system in 1982.
• Over the decades, analog electronic and then DDC ( Direct Digital Control ) products were added to the original pneumatic line.
• Central controllers and most terminal unit controllers are programmable, meaning the direct digital control program code may be customized for the intended use.
• Computers had already been applied to process automation for some time in the form of both direct digital control ( DDC ) and setpoint control.
• In 1982 it was possibly the first successful implementation of a distributed intelligence building automation or Direct Digital Control or DDC system using Z80 microprocessors.
• A very early example of a Direct Digital Control DCS was completed by the Australian business Midac in 1981 82 using R-Tec Australian designed hardware.
• No . 4, 344, 142, " Direct digital control of rubber molding presses . " The patent includes 11 method claims, three of which are independent.
• HVAC control system : this page says " Central controllers and most terminal unit controllers are not programmable, meaning the direct digital control program code may be not customized for the intended use ."
• Building and central plant operations are now relying heavily on direct digital controls; and as such the engineer is required to be much more computer literate to work with the BAS ( Building Automation System ).
• And Direct digital control : this page says exactly opposite; " Central controllers and most terminal unit controllers are programmable, meaning the direct digital control program code may be customized for the intended use ".
• And Direct digital control : this page says exactly opposite; " Central controllers and most terminal unit controllers are programmable, meaning the direct digital control program code may be customized for the intended use ".
• Novar ( also "'Novar Controls "') is a manufacturing company based in Cleveland, Ohio which develops technology to centrally control and manage HVAC, refrigeration and lighting systems for businesses, using direct digital control and energy management.
• Direct digital controls ( DDC ) with real time monitoring and history provide the ability to acquire system data realtime or with trend-logging, or trending, ( over a predetermined period of time ) to observe performance, issues / troubles, and identify possible improvements to operations and maintenance.