Patent EP0435224A2 successfully refreshed from Google Patents.
EP0435224A2
Expired / Lapsed
EP
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Remote supervisory and controlling system performing dimming control of light loads
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1990-12-21
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Granted: —
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Expires: 2010-12-21
Abstract
Abstract A dimming switch terminal unit for monitoring a dimming-up switch and dimming-down switch and a dimming control terminal unit for performing dimming control of an associated light load are connected to a central control unit through a two-wire signal line. The central control unit accesses each of the terminal units to perform time-divisional multiplex transmission of monitor data and control data therebetween. When the dimming-up switch or dimming-down switch is depressed, the central control unit detects monitor data indicating the switch depression and sends to the dimming control terminal unit control data instructing it to start dimming-up or dimming-down control. The dimming control terminal unit continues to dim up or dim down the associated light load until the dimming-up switch or dimming-down switch is released and the dimming control terminal unit receives control data instructing it to stop dimming up or dimming down the light load.
Inventors
- 👤 Yoshiharu Ito
- 👤 Susumu Nakano
- 👤 Toshiyuki Masuda
- 👤 Masatoshi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:56
CPC Classifications
H; H04; H04Q; H04Q9/00; H04Q9/14; H05; H05B; H05B47/00; H05B47/10; H05B47/175; H05B47/18; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1313; H02J13/18; H02J13/333; H05B39/00; H05B39/04; H05B39/08; H05B39/083; H05B39/085; H05B39/086; Y; Y02; Y02B; Y02B90/00; Y02B90/20; Y04; Y04S; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
224 words
A remote supervisory and controlling system in which a plurality of terminal units are connected to a central control unit through a two-wire signal line, and the central control unit accesses each of the terminal units to perform time-divisional multiplex transmission of monitor data and control data between the central control unit and each of the terminal units, said system comprising: a dimming switch terminal unit, connected to the signal line, for monitoring at least a dimming-up switch and a dimming-down switch; a dimming control terminal unit, connected to the signal line, for performing dimming-up and dimming-down control of an associated light load; and the central control unit, for, upon depression of the dimming-up switch or dimming-down switch, detecting dimming monitor data sent from the dimming switch terminal unit which indicates depression of the dimming-up switch or dimming down switch and sending to the dimming control terminal unit first control data which instructs it to start the dimming-up or dimming down control, and for, upon release of the dimming-up switch or dimming-down switch, sending to the dimming control terminal unit second control data which instructs it to stop the dimming-up or dimming-down control; wherein the dimming control terminal unit continues by itself the dimming-up or dimming-down control during a period from reception of the first control signal to reception of the second control signal.
Claim 2
Dependent Claim
81 words
The system according to claim 1, wherein each time a predetermined variation has occurred in a dimming level of the light load, the dimming control terminal unit sends to the central control unit level monitor data indicating the dimming level of the associated light load, the central control unit sends third control data indicating the dimming level to the dimming switch terminal unit, and the dimming switch terminal unit indicates the dimming level on the basis of the third control data.
Claim 3
Dependent Claim
145 words
The system according to claim 1, further comprising: a group dimming terminal unit, connected to the signal line, for monitoring at least a group dimming-up switch and a group dimming-down switch; and memory means, provided in the central control unit, for storing addresses of selected ones of the dimming control terminal units; wherein when the group dimming-up switch or group dimming-down switch of the group dimming terminal unit is manipulated, the central control unit controls the selected ones of the dimming control terminal units on the basis of the addresses stored in the memory means and group monitor data sent from the group dimming terminal unit which indicates manipulation of the group dimming-up switch or group dimming-down switch so that a plurality of the light loads connected to the respective selected ones of the dimming control terminal units are subjected to dimming control at once.
Claim 4
Dependent Claim
16 words
The system according to claim 3, wherein the memory means comprises an electrically erasable programmable ROM.
Claim 5
Dependent Claim
78 words
The system according to claim 1, wherein the dimming switch terminal unit further monitors an on/off switch, the dimming control terminal unit further performs on/off control of the associated light load; and the central control unit detects on/off monitor data sent from the dimming switch terminal unit which indicates manipulation of the on/off switch, and sends to the dimming control terminal unit on/off control data which instructs it to turn on or turn off the associated light load.
Claim 6
Dependent Claim
122 words
The system according to claim 5, wherein the dimming switch terminal unit comprises: a terminal unit case; the dimming-up switch, the dimming-down switch and the on/off switch, all of which are arranged on a front face of the terminal unit case; a signal processing circuit for generating the dimming monitor data and the on/off monitor data; an address setting section including an electrically erasable programmable ROM for setting an own address of the dimming switch terminal unit; an optical signal receiver section for receiving an optical signal representing the own address to be set in the address setting section; and a manipulation block comprising, as integral parts, three manipulation handles to be depressed to actuate the dimming-up, dimming-down and on/off switches, respectively.
Claim 7
Dependent Claim
155 words
The system according to claim 1, wherein the dimming control terminal unit comprises: a terminal unit case having normalized dimensions; a transmission processing circuit for recognizing the first and second control data sent from the central control unit; an address memory section for storing an own address of the dimming control terminal unit; a dimming circuit including a power control device for dimming the associated light load; a dimming control circuit for phase-controlling the dimming circuit; an address setting section, arranged on a front face of the terminal unit case, for setting the own address; a radiator plate arranged within the terminal unit case and thermally coupled with the power control device; and connecting holes, formed in side faces of the terminal unit case and capable of being connected to fixing metal fittings for fixing the terminal unit case to a distribution switchboard, for introducing external air to be in contact with the radiator plate.
Claim 8
Dependent Claim
57 words
The system according to claim 7, wherein the address setting section comprises a photodetector for detecting a first optical signal carrying address data, and a light-emitting element for emitting a second optical signal carrying confirmation data, and wherein the dimming control terminal unit further comprises a transmissive window capable of transmitting the first and second optical signal.
References Cited (Backward Citations)
No citation records indexed.
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