Boots – shoes – and leggings
Patent
1988-08-11
1990-07-24
Ruggiero, Joseph
Boots, shoes, and leggings
364141, 36447401, G05B 1918
Patent
active
049439057
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an interfacing method in a numerical control apparatus, which is capable of performing an interfacing process at a high speed for signal transfer between microprocessors respectively housed in a numerical control section and in a programmable sequence control section.
2. Description of the Related Art
In a numerical control apparatus of the type having a numerical control section and a programmable control section each of which accommodates therein a microprocessor, various signals are delivered and received, or, transferred, between these processors for execution of various control operations. For example, as shown in FIG. 2, upon completion of reading of a particular command code (an M code, for instance) from an NC program, the processor of the numerical control section, arranged to execute the NC program block by block, delivers a command data to a latch circuit housed in an interface circuit so as to store the same data in this latch circuit. It then sets a predetermined status bit (a status bit MF, for instance) of a register of the interface circuit at a logic level indicative of the command data being stored in the latch circuit. Thereafter, when the sequence control section completes a control operation associated with the command data read out through the interface circuit, the processor of the sequence control section sets a different status bit (a status bit MFIN, for instance) of the interface circuit at a logic level indicative of the control operation being completed. In response to this, the processor of the numerical control section starts execution of the succeeding block only after erasing the command data stored in the latch circuit, if necessary, and resetting the status bit MF. Then, the processor of the sequence control section resets the status bit MFIN. Thus, conventionally, the interfacing process for signal transfer between these processors is time-consuming, resulting in a time period for execution of control being lengthened.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an interfacing method in a numerical control apparatus, which is capable of effecting, at a high speed, an interfacing process for signal transfer between microprocessors respectively housed in a numerical control section and in a programmable control section.
In order to achieve the above-mentioned object, according to the present invention, there is provided an interfacing method wherein signal transfer between a numerical control section for executing a numerical control program block by block and a programmable sequence control section is effected by means of an interface circuit disposed between these sections. This interfacing method comprises the steps of: (a) operating said numerical control section so that a particular command is delivered to said interface circuit and a logic level of a first predetermined status signal stored in a first storage means of said interface circuit is reversed, when said numerical control section reads said particular command from the numerical control program; (b) operating said sequence control section so that a logic level of a second status signal stored in a second storage means of said interface circuit is reversed, when said sequence control section completes sequence control associated with said particular signal; and (c) operating said numerical control section so that a processing associated with the next block of the numerical control program is started, when a predetermined relation is fulfilled between said first and second predetermined status signals.
As mentioned above, according to the present invention, when a particular command is read out by the numerical control section and when a control operation associated with this command effected by the sequence control section is completed, a logic level of a corresponding status signal is reversed, respectively, and the next block of the numerical control program is executed when the predetermi
REFERENCES:
patent: 4029950 (1977-06-01), Haga
patent: 4034354 (1977-07-01), Simmons
patent: 4415965 (1983-11-01), Imazeki et al.
patent: 4513379 (1985-04-01), Wilson et al.
patent: 4550366 (1985-10-01), Toyama et al.
patent: 4584638 (1986-04-01), Akasofu
patent: 4628442 (1986-12-01), Isobe et al.
Iwagaya Takashi
Nakazato Tomomi
Fanuc Ltd.
Ruggiero Joseph
LandOfFree
Interfacing method in a numerical control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interfacing method in a numerical control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interfacing method in a numerical control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1270837