Programmable controller

Details Programmable controller Programmable controller

1983-02-17

1986-05-27

Atkinson, Charles E.

Excavating

364184, 364200, 371 16, G06F 1132

Patent

active

045920532

ABSTRACT:
While a user program is being executed, an abnormality detection program instruction which is part of the user program is executed, and in accordance with the result of logical operation between input and output data specified in the abnormality detection program, plural abnormality flags are set or reset respectively. As a result of this, all of the abnormality flags which are set are detected. And it is made possible to display all abnormality information corresponding to those detected abnormality flags.

REFERENCES:
patent: 3829842 (1974-08-01), Langdon et al.
patent: 4062061 (1977-12-01), Batchelor et al.
patent: 4133477 (1979-01-01), Marino et al.

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