Contact histogram for programmable controller

Details Contact histogram for programmable controller Contact histogram for programmable controller

1976-03-26

1978-01-24

Chapnick, Melvin B.

Boots, shoes, and leggings

364900, G06F 1100

Patent

active

040707024

ABSTRACT:
A controller programmer connects to a programmable controller and serves as a means for loading and editing the control program. When the contact histogram mode of operation is employed the logic state of a selected I/O device connected to the controller is monitored, and each time its status changes, its present status is recorded along with the time interval between status changes. A first embodiment is described in which the invention is employed in a hardwired controller program loader and a second embodiment is described in which the controller program loader employs a programmed microprocessor. In the first embodiment the status changes are recorded on paper tape and in the second embodiment they are recorded on a cathode ray tube screen.

REFERENCES:
patent: 3522597 (1970-08-01), Murphy
patent: 3701113 (1972-10-01), Chace et al.
patent: 3771144 (1973-11-01), Belady et al.
patent: 3818458 (1974-06-01), Deese
patent: 3829841 (1974-08-01), Steinberg
patent: 3868648 (1975-02-01), Levin
patent: 3921146 (1975-11-01), Danco
patent: 3939453 (1976-02-01), Schroeder
patent: 3969703 (1976-07-01), Kwiatkowski et al.
patent: 3971920 (1976-07-01), Johnson
patent: 3984662 (1976-10-01), Sorenson

Affiliated with

Also associated with

Rating

Contact histogram for programmable controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Contact histogram for programmable controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contact histogram for programmable controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-491358