Programmable controller having forcibly set or reset I/O states

Details Programmable controller having forcibly set or reset I/O states Programmable controller having forcibly set or reset I/O states

1986-10-09

1991-01-29

Lee, Thomas C.

Boots, shoes, and leggings

3649691, 3649692, G06F 1214, G06F 1216, G06F 1100

Patent

active

049891782

ABSTRACT:
A programmable controller includes an I/O memory for storing a plurality of input/output data items, a flag memory storing the same number of flags as the number of data items in the I/O memory, a data setter for writing set data or reset data into a relevant location in the I/O memory and for writing corresponding flag data into a relevant location of the flag memory in response to a certain I/O forced action operation, and a write control circuit for controlling the supply of writing pulses to the I/O memory by referring to the corresponding flag data of the flag memory for each item when writing data into the I/O memory during the execution of a command or during the updating of an input.

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