Method and systems for use with an industrial controller

Details Method and systems for use with an industrial controller Method and systems for use with an industrial controller

1994-04-26

1996-04-16

Ruggiero, Joseph

Boots, shoes, and leggings

364DIG2, 3649269, 364949, G06F 1900, G06F 900

Patent

active

055089097

ABSTRACT:
A method and system for generating a control program executable by an industrial controller, wherein a source program is displayed using a variable width ladder diagram. Instructions of a source program are received by a host computer, wherein the source program is compilable into the control program. A ladder diagram representative of at least one of the instructions of the source program is displayed on a display device. The ladder diagram comprises a graphical interconnection of schematic elements, at least one of which having a corresponding display width which is variable. The corresponding display width is varied in dependence upon the greater of a corresponding symbol display width and a corresponding label display width. A method and system for data communication with the industrial controller uses a hybrid error detection code. Each transmitted packet of data is augmented with either a Fletcher checksum code if the length of the packet is less than a predetermined packet length threshold, or a CCITT-16 cyclic redundancy check code if the length of the packet is greater than or equal to the predetermined packet length threshold.

REFERENCES:
patent: 4244034 (1981-01-01), Cherba
patent: 4302820 (1981-11-01), Struger
patent: 4316260 (1982-02-01), Hideshima
patent: 4449180 (1984-05-01), Ohshima et al.
patent: 4831580 (1989-05-01), Yamada
patent: 4937777 (1990-06-01), Flood et al.
patent: 4991076 (1991-02-01), Zifferer et al.
patent: 5058052 (1991-10-01), Sexton et al.
patent: 5068778 (1991-11-01), Kosem et al.
patent: 5097405 (1992-03-01), Sato
patent: 5126956 (1992-06-01), Komiya et al.
patent: 5142469 (1992-08-01), Weisenborn
patent: 5168441 (1992-12-01), Onarheim et al.
patent: 5177420 (1993-01-01), Wada et al.
patent: 5285376 (1994-02-01), Struger et al.
patent: 5287548 (1994-02-01), Flood et al.
patent: 5299114 (1994-03-01), Onishi et al.
patent: 5331540 (1994-07-01), Tanaka et al.
John Kodis; Fletcher's Checksum, Error Correction at a Fraction of the Cost; May, 1992; pp. 32, 34, 36, 38; Dr. Dobb's Journal.

Affiliated with

Also associated with

Rating

Method and systems for use with an industrial 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 Method and systems for use with an industrial controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and systems for use with an industrial controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-330106