Programmable controller with self testing I/O structure

Details Programmable controller with self testing I/O structure Programmable controller with self testing I/O structure

1988-06-16

1989-06-13

Shaw, Gareth D.

Boots, shoes, and leggings

G06F 1310

Patent

active

048398527

ABSTRACT:
A programmable controller includes a processor unit which connects to one or more I/O units that connect to sensing devices and operating devices on equipment being controlled. When placed in the RUN mode, the processor determines the number of I/O units required to execute the user control program, and during each subsequent I/O scan, the number of connected and operating I/O units is checked to insure proper operation.

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