Communications: electrical – Continuously variable indicating – With meter reading
Patent
1992-03-18
1998-09-29
Ton, Dang
Communications: electrical
Continuously variable indicating
With meter reading
370451, H04Q 100
Patent
active
058150820
ABSTRACT:
A number of domestic audio/video apparatuses (10-14) are connected to a serial control bus (D2B, 16). Each apparatus is addressable via the bus as a device and contains functional elements addressable on subdevices. One apparatus (14) includes an on-screen display subdevice (41) and a first control subdevice (24). Subdevice status messages are defined whereby a control subdevice can ask to be informed of the status of a further subdevice (e.g. 26), and in particular to be informed automatically of any change in status without the need for continuous polling of subdevices. The subdevice status messages can be used to obtain early confirmation of a signal path being established through the system.
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"Targetted MCU Design For Control Networks", by S. Heath, Electronic Product Design, vol. 12, No. 7, Jul. 1991.
DB2 Systems Company Limited
Ton Dang
Wieghaus Brian J.
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