ＡBSＴRACＴ
In the moderｎ sociｅtｙ， the rapid deｖelopment ｏf the ｂrｏｋerａｇ
ｅ, ｈigh-rｉse buildings， increａsingly, hｉgh—rｉse ｂuilｄinｇｓ， floors
high， dozens oｆ lａyer is oｎlｙ ｓtairs ｈave beｅｎ unaｂle ｔo meet ｔhe
dｅmanｄ ｏｆ peopｌe， the ｅmergｅncｅ oｆ the eleｖatｏr ｓolvｅｄ thiｓ d
ｉffiｃult proｂlｅm, therefｏｒｅ, the ｄeveｌｏpmeｎt oｆ the elevator hａs
aｌｓo becｏｍe a kｉnd of tｒeｎd， foｒ eleｖatoｒ cｏｎtｒol moｒｅ
and morｅ higｈ, favｏred by ｐeople, bｅcame a ｈigh－rｉse building coｌ
umns iｎ the bus． People lｉving weｌｌ， also to thｅ reqｕiｒement of safety
ａnｄ comfort ｏf lifｅ is higher, so thｅ ｅlevator in laｔｅr deｖｅlopｍeｎt,
aｌsｏ ｗｉth ｔhe dｅvｅｌｏpmeｎt oｆ tｈis trｅnd。 Ａbｏut how ｔｏ att
ａｉn the ｐasｓenｇer ｅlevaｔor, saｆe ａnｄ comｆoｒｔaｂlｅ ｔhｉｓ p
ｒobｌem， thｅ eｌｅvatoｒ ｃｏｎtroｌ ｒequirementｓ ｉn ｔｈe ｍｏtｏ
r speeｄ and cｏｎtrol precision ａnd speed range ａｎd ｓｏ ｏn, puts
foｒwaｒd ｔhe mｏre stricｔ coｎtrol requirｅmeｎts in ｅaｃh aspecｔ。 Aｌｓ
o wａs ｂorn, with ｔhe deｖelｏｐment of iｎdustrial ｄｅmａnd, PLＣ contrｏ
l using PLC, provideｄ the dｅvｅlopmｅnt dｉreｃtｉon of ｗidｅr. ＰＬC for
induｓtry, aｌoｎg witｈ its ｄeｖｅlｏpmeｎt， its volume iｓ morｅ ａnd m
ｏre small, fuｎctioｎ also ｍoｒe ａnd mｏｒe ｐerｆect， ｔhｅ cｏntｒoｌ
ｅfｆeｃｔ is more sｔabｌe, caｎ rｅｄuce the iｎfluence of iｎｔｅｒferｅnce
on tｈe. With the mechａnｉcaｌ aｎd elｅｃtｒｉcａｌ coｍponents， the func
ｔioｎ of ｉｎtegraｔed iｎ ａ sｙstem. Ｔｈeｒefore， PＬＣ foｒ the
development of the eｌevator, has become the key technology oｆ ｉts ｏpeｒation
Ｋeywords: elevaｔor, PＬC， reｌay
