Program timer
AssigneeMatsushita Electric Works, Ltd.
InventorsTakeshi Hatemata, Yuichi Yoshimura
Life of this patent
Estimating the term…
Abstract
A timer processing section 10 instructs a transmission processing section 11 to control load in accordance with a time schedule stored in a program storage section 12. The transmission processing section 11 is connected to a two-wire signal line and gives a load control instruction to each terminal to which load is connected according to a time-division multiplex transmission system. The time schedule stored in a program storage section 12 is a set of the address related to the load to be controlled and the control contents and the control time of the load. Therefore, when the time set according to the time schedule is reached, the load specified by the address is controlled.
Claims19
A program timer used with a remote supervisory control system comprising:
- a plurality of terminals including unique addresses, the terminals being connected to a signal line, a transmission signal being transferred according to a time-division multiplex transmission system between a transmission unit connected to the signal line and the terminals, and load connected to another terminal can be controlled in response to supervisory input to one of the terminals using the address correspondence;
- a program storage section for storing a set of the address related to the load to be controlled and the control contents and the control time of the load as a time schedule;
- a setting and operation section for setting the control contents and the control time by address and setting a time schedule in said program storage section;
- a clock section for counting the current time, and
- a signal processing section, when the control time in each time schedule stored in said program storage section matches the current time counted by said clock section, for functioning as a terminal with the control contents in the time schedule as supervisory input with the address in the time schedule as the address.
A program timer unit used with a remote supervisory control system comprising:
- an operation terminal and a control terminal each having a unique address are connected to transmission unit via a two-wire signal line, data being transmitted and received with a time-division multiplex transmission signal, the transmission unit sending a transmission signal containing address data to the signal line to access the operation terminal and the control terminal separately, and upon reception of supervisory data from the operation terminal with supervisory input in a signal return period setting in synchronization with the transmission signal, the transmission unit generating control data based on the supervisory input and transmitting the control data to the control terminal having preset address correspondence with the operation terminal generating the supervisory data for controlling load connected to the control terminal;
- input means for inputting data containing load control time and control contents;
- program creation means for creating a load control program based on the data input through said input means;
- storage means for storing the created control program;
- clock means for counting the current time;
- transmission signal transmission-reception means for transmitting and receiving a transmission signal to and from the transmission unit via the signal line;
- and
- timer control means for generating supervisory data in sequence based on the current time data output from said clock means and the control program read from said storage means and causing said transmission signal transmission-reception means to send the generated supervisory data to the signal line.
Dependencies are inferred from the claim text.