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US 4,954,980 AGranted
High speed input/output module and programmable logic control device
AssigneeFanuc Corporation
InventorTakashi Yamauchi
Life of this patent
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Abstract
A programmable logic control (PLC) device for executing a logical operation process of a sequence for program. The PLC device includes a PLC control unit (10) and a high speed input/output module (20) capable of executing a logical operation at a high speed in response to an external input signal and externally outputting a result of the logical operation, whereby an external signal to be processed at high speed can be processed without using a special processing unit.
Claims5
A high speed input/output module for a programmable logical control (PLC) device and a numerical control apparatus, comprising:
- programmable logic control means;
- a programmable logical operation element, operatively connected to said programmable logic control means, for executing a logical operation at high speed in response to an external input signal and an output from said programmable logic control means, for externally outputting a result of the logical operation, and for inputting a result to said programmable logic control means;
- at least one input module, operatively connected to said programmable logic control means, for receiving signals which must not be executed at high speed;
- and
- at least one output module, operatively connected to said programmable logic control means, for outputting signals at low speed from said programmable logic control means.
2 more elements
Dependencies are inferred from the claim text.