Terminal device for a monitoring and control system
First Claim
1. A terminal device adapted to effect transmission and receipt of information through address polling from a central monitoring and control device, comprising:
- first address setting means in which an address having a predetermined number of bits is preset;
comparing means for comparing address data sent from said central monitoring and control device with said address having the predetermined number of bits and set in said first address setting means;
second address setting means in which, when said address data sent from said central monitoring and control device coincides with said address set in said first address setting means, a new address having a fewer number of bits than that of said address set in said first address setting means is sent from said central monitoring and control device and is set,wherein after the new address is set in said second address setting means, said central monitoring and control device effects polling on the basis of said new address.
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Accused Products
Abstract
In a terminal device adapted to effect transmission and receipt of information through address polling by a central monitoring/control device, an address having a predetermined number of bits is preset in a first address setter, and an address comparator compares the address of a predetermined number of bits set in the first address setter with address data sent from the central monitoring/control device. As the result of this comparison, when the address of the predetermined number of bits set in the first address setter coincides with an address sent from the central monitoring/control device, the central monitoring/control device sends a new address, and this new address is set in a second address setter with respect to the terminal device whose address has coincided. Thus, after the new address is set in the second address setter of each of the terminal devices, the terminal devices are polled by the central monitoring/control device on the basis of these new addresses.
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Citations
7 Claims
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1. A terminal device adapted to effect transmission and receipt of information through address polling from a central monitoring and control device, comprising:
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first address setting means in which an address having a predetermined number of bits is preset; comparing means for comparing address data sent from said central monitoring and control device with said address having the predetermined number of bits and set in said first address setting means; second address setting means in which, when said address data sent from said central monitoring and control device coincides with said address set in said first address setting means, a new address having a fewer number of bits than that of said address set in said first address setting means is sent from said central monitoring and control device and is set, wherein after the new address is set in said second address setting means, said central monitoring and control device effects polling on the basis of said new address. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification