Boots – shoes – and leggings
Patent
1985-11-20
1988-07-05
Harkcom, Gary V.
Boots, shoes, and leggings
361380, G06F 1300, H05K 702
Patent
active
047559349
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This application is related to my copending U.S. application Ser. No. 796,021, filed Oct. 17, 1985.
BACKGROUND OF THE INVENTION
The present invention relates to an input/output board address selecting system for selecting a desired address in pluralities of input and output boards connected to a common bus of an input/output interface unit which is connected, via a serial data transmission system, with a main control unit including a microcomputer and a RAM or the like.
In numerical control equipment or similar control apparatus, output signals for controlling a machine tool or like controlled system, such as ON, OFF signals and so forth, and input signals indicating various states of the controlled system, such as ON, OFF, signals and so on, are provided via pluralities of input boards and output boards connected to a common bus of an input/output interface unit. In this instance, the destination of data transmission is specified by sending a coded address of the destination over an address line. Each board connected to the common bus monitors the state of the address line and, when the state of the address line matches its own address, recognizes that it has been selected as the destination of data transmission. Therefore, each board needs to be assigned a distinct address. On the other hand, numerical control equipment or the like may sometimes employ pluralities of input and output boards of the same kind, in which case it is necessary to hold the distinct address of each board variable. In general, this is implemented by address setting on hardware for each board. Accordingly, in the case of employing such boards, it is necessary to perform address setting for each of them although they are of the same kind, and this constitutes an obstacle to their maintenance.
SUMMARY OF THE INVENTION
An object of the present invention is to eliminate the necessity of address setting for each board, facilitating its maintenance.
According to the present invention, in the input/output board address selecting system which selects a desired address in pluralities of input and output boards connected to a common bus of an input/output interface unit which is connected via a serial data transmission system with a main control unit including a microcomputer and a RAM or the like, a programmable address translation circuit is provided which derives a slot select signal and an in-board address from an address for accessing the input or output boards which is provided from a control circuit of the input/output interface unit. One of the input and output boards is selected by the slot select signal available from the address translation circuit, and one of the addresses in the selected input or output board is selected by the in-board address from the address translation circuit.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of the principal part of an embodiment of the present invention;
FIG. 2 is a block diagram of the principal part of an example of an address translation circuit 5;
FIG. 3 is a block diagram of the principal part of an example of an output board 10;
FIG. 4 is a block diagram of the principal part of an example of an input board 12;
FIG. 5 is a block diagram of an example of a control circuit 2;
FIG. 6 is a block diagram of the general arrangement of a system embodying the address selection system of the present invention;
FIG. 7 is a diagram explanatory of an address space of a microprocessor;
FIG. 8 is a block diagram of an example of a control circuit 66; and
FIG. 9 is a diagram of the mechanical structure of an input/output interface unit.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1 which illustrates the arrangement of an input/ output interface unit 1, reference numeral 2 indicates a control circuit, 3 a serial-parallel converter such as a serial-in parallel-out register or the like, 4 a parallel-serial converter such as a parallel-in serial-out register or the like, 5 an address translation circuit and 6 a common bus, wh
REFERENCES:
patent: 3942158 (1976-03-01), Dummermuth
patent: 4093998 (1978-06-01), Miller
patent: 4122519 (1978-10-01), Bielawski et al.
patent: 4158226 (1979-06-01), Struger et al.
patent: 4172280 (1979-10-01), Spiesman
patent: 4172289 (1979-10-01), Struger et al.
patent: 4227247 (1980-10-01), Kintner
patent: 4228495 (1980-10-01), Bernhard et al.
patent: 4247882 (1981-01-01), Prager et al.
patent: 4281392 (1981-07-01), Grants et al.
patent: 4284362 (1981-08-01), Jackson et al.
patent: 4360870 (1982-11-01), McVey
patent: 4373181 (1983-02-01), Chisholm et al.
patent: 4428043 (1984-01-01), Catiller et al.
patent: 4432067 (1984-02-01), Nielsen
patent: 4517154 (1985-05-01), Dennis et al.
patent: 4562535 (1985-12-01), Vincent et al.
patent: 4596014 (1986-06-01), Holeman
patent: 4628437 (1986-12-01), Poschmann et al.
Fanuc Ltd.
Harkcom Gary V.
Lacasse Randy W.
LandOfFree
System for selecting an address in an input/output board does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for selecting an address in an input/output board, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for selecting an address in an input/output board will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2336572