These PLCs were programmed in " ladder logic ", which strongly resembles a schematic diagram of relay logic.

IEC 61131-3 currently defines five programming languages for programmable control systems: function block diagram ( FBD ), ladder diagram ( LD ), structured text ( ST ; similar to the Pascal programming language ), instruction list ( IL ; similar to assembly language ) and sequential function chart ( SFC ).

Shown is a " ladder diagram " which shows the control system.

Part of a ladder diagram, including contacts and coils, compares, timers and Monostable Multivibrator | monostable multivibrator s

A normally open contact must be used in the ladder diagram, since this input is normally turned on through the normally closed pushbutton contact, and turns off when the button is pressed.

The actual fish ladder makes several right angle turns, which are not reflected in this diagram.

He is the creator of the ' information ladder ', a diagram which describes the stages in human learning.

The information ladder is a diagram created by education professor Norman Longworth to describe the stages in human learning.

* Causal diagrams-Similar to the ladder diagram but doesn't show the props held in a juggler's hands.

In the diagram, GM Aronian's queen on d3 is at the top of the ladder, and his rook on d1 represents the bottom.

The only hope which good teachers have for being paid their due is to stop dragging the dead weight of poor teachers up the economic ladder with them.

Above this point there is no generally used parallel ladder.

There would seem to be some small solace in the prospect that the missile race between nations is at the same time accelerating the study of the space around us, giving us a long-sought ladder from which to peer at alien regions.

Astrometry is an important step in the cosmic distance ladder because it establishes parallax distance estimates for stars in the Milky Way.

( Another simpler system, called ladder bracing, where the braces are all placed across the width of the instrument, is used on all types of flat-top guitars on the back.

In choosing analgesics, the severity and response to other medication determines the choice of agent ; the WHO pain ladder, originally developed in cancer-related pain, is widely applied to find suitable drugs in a stepwise manner.

* Fellow – In a dual career ladder organization a fellow is often a very senior technical position and is equal to a director or VP

The Principal title is often used in dual career ladder organizations and may be equivalent to manager or director.

For example, if a player's " home " or destination corner is empty ( not an opponent's starting corner ), the player can freely arrange his / her pieces to serve as a ' ladder ' or ' bridge ' between the two opposite ends.

The same small ladder below the top-right window is also visible in recent photographs ; this has remained in the same position since 1854 over a disagreement to move it.

* A trapdoor is a door that is oriented horizontally in a floor or ceiling, often accessed via a ladder.

Each strand of DNA is a chain of nucleotide s, matching each other in the center to form what look like rungs on a twisted ladder.

The DNA size marker is a commercial 1 kbp ladder.

It said the Fathers saw foreshadowings of Mary's " wondrous abundance of divine gifts and original innocence " " in that ark of Noah, which was built by divine command and escaped entirely safe and sound from the common shipwreck of the whole world ; in the ladder which Jacob saw reaching from the earth to heaven, by whose rungs the angels of God ascended and descended, and on whose top the Lord himself leaned ; in that bush which Moses saw in the holy place burning on all sides, which was not consumed or injured in any way but grew green and blossomed beautifully ; in that impregnable tower before the enemy, from which hung a thousand bucklers and all the armor of the strong ; in that garden enclosed on all sides, which cannot be violated or corrupted by any deceitful plots ; in that resplendent city of God, which has its foundations on the holy mountains ; in that most august temple of God, which, radiant with divine splendours, is full of the glory of God ; and in very many other biblical types of this kind.

The Eastern Orthodox Church and those Eastern Catholic Churches which follow the Byzantine Rite see Jacob's dream as a prophecy of the Incarnation of the Logos, whereby Jacob's ladder is understood as a symbol of the Theotokos ( Virgin Mary ), who, according to Orthodox theology, united heaven and earth in her womb.

The final rung of the ladder — beyond prayer ( προσευχή ), stillness ( ἡσυχία ), and even dispassion ( ἀπαθεία )-- is love ( ἀγάπη ).

) Several monks are depicted climbing a ladder ; at the top is Jesus, prepared to receive them into Heaven.

Often, in the lower right corner St. John Climacus himself is shown, gesturing towards the ladder, with rows of monastics behind him.

This is known as drop-stitch knitting, and produces a vertical ladder of see-through holes in the fabric, corresponding to where the wale had been.

The Knights are led by a man who is approximately 12 feet tall with disproportionately short arms and reindeer antlers inserted into his helmet ( played by Michael Palin standing on a ladder ; the original screenplay suggested that he be played by " Mike standing on John's shoulders ").

An RNA ladder is often run alongside the samples on an electrophoresis gel to observe the size of fragments obtained but in total RNA samples the ribosomal subunits can act as size markers.

The most common of these is the ladder match.

In the basic ladder match, the wrestlers or teams of wrestlers must climb a ladder to obtain a prize that is hoisted above the ring.

The conspiracy took its name from a torture method, in which blacks were tied to a ladder and whipped until they confessed or died.

Another method involves standing on a ladder and " milking " the olives into a sack tied around the harvester's waist.

Modern PLCs can be programmed in a variety of ways, from the relay-derived ladder logic to programming languages such as specially adapted dialects of BASIC and C. Another method is State Logic, a very high-level programming language designed to program PLCs based on state transition diagrams.

The " ladder operator " method, due to Paul Dirac, allows us to extract the energy eigenvalues without directly solving the differential equation.

fa ' afafine – facial ( sex act ) – facial feminization surgery – FACOG – faecal-oral route – fag hag – fainting – faithfulness – fakaleiti – fake orgasm – fake prostitution – falling in love – Fallopian pregnancy – Fallopian tube – Gabriele Falloppio – family – family planning – famosae – fantasy – fantasy play – fantasy role play – fart fetishism – fashion health – fat admirer – fat fetishism – Anne Fausto-Sterling – fear play – feces – fecophilia – fecundity – feedee – feeder ( fetish ) – feederism – felching – fellatio – female – female circumcision – female condom – female dominant sex position – female ejaculate – female ejaculation – female fertility after 30 – female genital mutilation – female impersonator – female masking – female prostate – female pseudohermaphroditism – female reproductive system ( human ) – female sex tourism – femaleness – fem-dom – femdom – femidom – femidon – femininity – feminine essence theory of transsexuality – feminism – feminist – feminist sexology – femme – femme fatale – fertility – fertility and diet – fertility awareness method – fertility clinic – fertility rite – fertilization – fetal genitalia – fetish – fetish clothing – fetish club – fetish community – fetish subculture – fetishism – fetus – fiancé – fiancée – fibroblast – fibroma – fibula – fidelity – figging – fimbria ( female reproductive system ) – finger cot – finger fucking – fingering ( sexual act ) – fire play – fist fucking – fisting – fisting sling – Fitz-Hugh-Curtis syndrome – flagellant – flagellation – flamer – flatulence – Fleet Marriage – fleshlight – Wilhelm Fliess – flirt – flirting – Flirty Fishing – Florentine girdle – flowergirl – fluid bonding ( sexual practice ) – fluid monogamy – folie à deux – follicle-stimulating hormone – follicular antrum – follicular fluid – folliculogenesis – foot binding – foot fetish – foot fetishism – forced abortion – forced bi – forced bisexuality – forced chastity – forced feminization – forced marriage – forced sterilization – Auguste Forel – forensic sexology – foreplay – foreskin – foreskin piercing – foreskin restoration – formicophilia – Forms of nonmonogamy – fornication – fornicatory doll – fossa of vestibule of vagina – four-letter word – fourchette – fourchette piercing – foxy boxing – fraternal polyandry – fraternal twin – Free Hosted Gallery – free love – freemartin – frenar band – French kiss – French kissing – French letter – French postcard – French tickler – frenulum – frenulum breve – frenulum clitoridis – frenulum labiorum pudendi – frenulum of prepuce of penis – frenulum preputii penis – frenum – frenum ladder – frenum piercing – frequency of sexual intercourse – Sigmund Freud – Freudian psychosexual stages – Kurt Freund – friends with benefits – frigidity – frogtie – frot – frottage – frotteur – frotteurism – fuck – fuck of death – fuck-buddy – fuckbuddy – Fumoto no iro – fundiform ligament – fundus ( uterus ) – fur fetishism – furor uterinus –

Over the following thirty years many climbs were made using this method before the ladder fell into disrepair.

Statue of an astronomer and the concept of the cosmic distance ladder by the parallax method, made from the azimuth ring and other parts of the Yale-Columbia Refractor ( telescope ) ( c 1925 ) wrecked by the 2003 Canberra bushfires which burned out the Mount Stromlo Observatory ; at Questacon, Canberra, Australian Capital Territory

As programming terminals evolved, it became more common for ladder logic to be used, for the aforementioned reasons and because it was a familiar format used for electromechanical control panels.

Most such devices include a tiny postage stamp sized LCD screen for viewing simplified ladder logic ( only a very small portion of the program being visible at a given time ) and status of I / O points, and typically these screens are accompanied by a 4-way rocker push-button plus four more separate push-buttons, similar to the key buttons on a VCR remote control, and used to navigate and edit the logic.

This argument has become less relevant given that most ladder logic programmers have a software background in more conventional programming languages, and in practice implementations of ladder logic have characteristics, such as sequential execution and support for control flow features, that make the analogy to hardware somewhat inaccurate.

Logic control systems for industrial and commercial machinery were historically implemented at mains voltage using interconnected relays, designed using ladder logic.

After the control of air flow and temperature was standardized, the use of electromechanical relays in ladder logic to switch dampers became standardized.

A dam and fish ladder at one end allow control of the creek's flow.

Today tractor-drawn semi-trailers for ladder trucks utilize a " tiller " ( rear steering axle ) driver to control the trailer where the aerial ladder is located.

The crew ladder ends at a round pressure hatch in the middle of a floor bulkhead that leads to the crew's upper living and control compartment.

In a Wildfire, fire control includes various wildland fire suppression techniques such as defensible space, opening the fuel ladder spacing, removing fuel in the fire's path with firebreaks and backfires, to minimize the brushfire from reaching new combustible fuel and spreading further.

), to ascend the social ladder and receive social justice, satisfy the public's needs, and raise a military to maintain control of the nation.

Undertaker won the match and retained the title thanks to a sealing run-in by Triple H. That same night, Vince and Shane defeated Austin in a ladder match to win his 50 % share of the company and regain full control of the WWF.

More examples include the implementation of NASCAR's new Chase for the Cup points system, and Fight to the Top mode, where you control a custom driver throughout his career starting in the lower series and working up the ladder ( similar to NASCAR: Dirt to Daytona ).

At King of the Ring, Vince and Shane defeated Austin in a handicap ladder match to regain control of the WWF.