High-speed press control system
First Claim
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1. A programmable logic controller (PLC) for controlling a high-speed machine operating in cycle-type modes, the machine having a plurality of components having at least two status states, the PLC comprising:
- an executive memory,an image memory including an input image table and an output image table,a machine control algorithm,an internal clock for generating repetitive timed interrupts,a control processor for coordinating operation of the system in accordance with instructions contained in said executive memory, including updating of said image memory;
a communication bus adapted for communicating with the machine; and
a scan processor having its own executive memory, said scan processor for reading said input image table, executing said machine control algorithm and updating said output image table in response to said repetitive timed interrupts.
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Abstract
A high-speed press control system including a control processor and an associated scan processor for executing a press algorithm providing timed interrupts and consisting of identical programmable sub-algorithms to control output and input registers. The high-speed press control system has the capability of monitoring and reacting to press position every 2.5 ms.
64 Citations
8 Claims
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1. A programmable logic controller (PLC) for controlling a high-speed machine operating in cycle-type modes, the machine having a plurality of components having at least two status states, the PLC comprising:
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an executive memory, an image memory including an input image table and an output image table, a machine control algorithm, an internal clock for generating repetitive timed interrupts, a control processor for coordinating operation of the system in accordance with instructions contained in said executive memory, including updating of said image memory; a communication bus adapted for communicating with the machine; and a scan processor having its own executive memory, said scan processor for reading said input image table, executing said machine control algorithm and updating said output image table in response to said repetitive timed interrupts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification