CASE STUDY (ENG) - Implementation of automation model for schools

On this case study, we will build a demo consisting in the automatization of some sensors and actuators using an Arduino based PLC. We will program it with the Open Source Arduino IDE.

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1. C A S E S T U D Y I N D U S T R I A L S H I E L D S S U M M A R Y W h y d i d w e t h i n k o f t h i s a p p l i c a t i o n ? T h e m a i n r e a s o n i s b e c a u s e i t i s v e r y i n t e r e s t i n g t o s h o w t o t h e s t u d e n t s t h a t t h e r e i s a n o t h e r a l t e r n a t i v e , a p a r t f r o m t h e b i g b r a n d s o f P L C s t h a t w o r k w i t h p r o g r a m m i n g l a n g u a g e s . O u r P L C i s b a s e d o n a n A r d u i n o b o a r d w h i c h c o n t r o l s d i f f e r e n t k i n d s o f i n p u t s / o u t p u t s u s i n g a m i c r o - c o n t r o l l e r , f o r e x a m p l e , A n a l o g i c , D i g i t a l a n d P W M . T h e s o f t w a r e i s c a l l e d A r d u i n o I D E ; i t i s t o t a l l y f r e e a n d e a s y t o u s e a n d i t s l a n g u a g e o f p r o g r a m m i n g i s C ( l i n e a l c o d e ) . W e w o u l d a l s o l i k e t o s a y t h a t u s i n g o u r P L C s , y o u c a n c o m m u n i c a t e t h e m w i t h y o u r P C P a n e l ( H M I ) b y U S B , a n d w i t h o t h e r d e v i c e s b y E t h e r n e t , W i f i , G P R S , L o r a a n d M o d b u s . I M P L E M E N T A T I O N O F A N A C A D E M I C A U T O M A T I O N M O D E L O n t h i s c a s e s t u d y , w e w i l l b u i l d a d e m o c o n s i s t i n g i n t h e a u t o m a t i z a t i o n o f s o m e s e n s o r s a n d a c t u a t o r s u s i n g a n A r d u i n o b a s e d P L C . W e w i l l p r o g r a m i t w i t h t h e O p e n S o u r c e A r d u i n o I D E .

2. T h e c o n v e y e r b e l t s t a r t s m o v i n g . F i r s t s e n s o r ( S 1 ) c h e c k s i f t h e r e i s a b o x o n t h e b e l t . T h e b o x i s p l a c e d o n t h e c o n v e y e r b e l t b y t h e f i r s t c i l i n d e r ( t h e b o x p a s s e s t h r o w m i c r o 1 a n d t u r n s i t O N ) ( C 1 ) . T h e c i l i n d e r ( C 1 ) i s r a i s e d u n t i l t h e b o x i s d e t e c t e d b y m i c r o 2 . I f S 2 i s O N , t h e n C 2 i s m o v e d u n t i l t h e b o x i s d e t e c t e d b y m i c r o 3 i n o r d e r t o p u t t h e l a b e l . C 2 i s m o v e d u p u n t i l m i c r o 4 d e t e c t s t h e b o x , C 3 i s m o v e d u n t i l i t s d e t e c t i o n b y m i c r o 5 . T h i s c i l i n d e r t a k e s t h e b o x o u t o f t h e l a b e l l i n g a r e a . F i n a l l y , C 3 g o e s b a c k u n t i l i t i s d e t e c t e d b y m i c r o 6 . T h e I n d u s t r i a l S h i e l d s ' e q u i p m e n t h a s t o c o n t r o l 3 c y l i n d e r s ( C i ) , 2 c a p a c i t i v e s e n s o r s ( S 1 a n d S 2 ) , 6 m i c r o i n d u c t i v e s e n s o r s ( e a c h c y l i n d e r h a s 2 o f t h e m ) ( m i c r o i ) a n d a c o n v e y e r b e l t , u s i n g t h e f o l l o w i n g s e q u e n c e : Y o u c a n s e e t h e G R A F C E T o f t h e s e q u e n c e o n t h e a d j a c e n t p i c t u r e . C A S E S T U D Y G O A L A f t e r r e a d i n g t h i s c a s e s t u d y , y o u w i l l b e a b l e t o b u i l d a n a c a d e m i c m o d e l a n d s h o w t o y o u r s t u d e n t s a n e w a n d i n t e l l i g e n t w a y t o a u t o m a t e e v e r y t h i n g y o u w a n t t o , a n d y o u w i l l a l s o h a v e s o m e i d e a s t o c r e a t e n e w p r o j e c t s . T h i s m o d e l c o n s i s t s i n a l a b e l l i n g l i n e o f b o x e s . C O N C L U S I O N ( H A R D W A R E ) F à b r i c a d e l P o n t 1 - 1 1 · ( R e c i n t e i n d u s t r i a l d e l P o n t V e l l ) · 0 8 2 7 2 , S a n t F r u i t ó s d e B a g e s ( B a r c e l o n a ) · S p a i n i n f o @ i n d u s t r i a l s h i e l d s . c o m • w w w . i n d u s t r i a l s h i e l d s . c o m W e n e e d t o c o n n e c t b o t h k i n d s o f s e n s o r s t o t h e d i g i t a l i n p u t s o f t h e P L C . T h e c y l i n d e r s a r e m o v e d w i t h c o m p r e s s e d a i r , s o w e n e e d 3 e l e c t r o v a l v e s w h i c h a r e c o n t r o l l e d b y d i g i t a l o u t p u t s o f t h e P L C . T h e c o n v e y e r b e l t i s m o v e d b y a n e n g i n e w h i c h i s a l s o c o n t r o l l e d b y a d i g i t a l o u t p u t o f t h e P L C .

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