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7.4Factorydoor
Requirementsforagatecontrolsystem
Inmanycasesafactoryentranceisclosedwithrollgates.Thosegatesareonlyopenedwhenvehicles
needtoenterorleavethefactorygrounds.Thegateiscontrolledbytheporter.
l Theslidinggateisopenedandclosedbymeansofapushbuttoncontrolinthegatehouse.Theporter
canmonitorthegateoperation.
l Therollgateisnormallyfullyopenedoritisclosed.However,gatemovementscanalwaysbe
interrupted.
l Aflashinglightisactivatedfivesecondsbeforethegatemoves,andwhilethegateisinmotion.
l Asafetypressurestripensuresthatpeoplearenotinjuredandthatnoobjectsaretrappedand
damagedwhenthegateisclosing.
7.4.1Standardsolution
Therearemanydifferentcontrolsystemsforoperatingautomaticgates.TheOPENandCLOSEbuttons
initiategatemovementsintotherelevantdirection,provideditisnotalreadymovingintheopposite
direction.MovementofthegateisterminatedeitherbymeansoftheSTOPbuttonortherelevantlimit
switch.