Xây dựng, thiết kế hệ thống cân định lượng và đóng bao tự động (Đồ án tốt nghiệp)

ISO 9001:2008

- 2017


ISO 9001:2008

CHÍNH QUY

Sinh viên:
: T

- 2017


----------------o0o-----------------

Sinh viên :
L p : C1701:

MSV : 1312102008


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o ngày......tháng.......

7.
7

Sinh viên

T

2017


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7
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L IC

Sinh viên

M CL C
L IM

U ........................................................................................................6
. GI

I THI U T NG QUAN............................................................7

1.1. GI I THI U CHUNG ................................................................................7
1.2. GI I THI U H TH

.....................................7

CÁC THI T B

U KHI N H TH NG ..................................13

2.1. GI I THI U PLC S7 200 CPU 224 ........................................................13
2.1.1. T ng quát v PLC ..............................................................................13
2.1.2 . C u trúc , nguyên lý ho

ng c a PLC ..........................................15

2.1.2.1. C u trúc .......................................................................................15
2.1.2.2. Nguyên lý ho
2.1.3. X

ng c a PLC ....................................................15
.............................................................................18

2.1.4. PLC SIMATIC S7-200 CPU 224....................................................19
2.2. GI I THI U V HMI ..............................................................................22
2.2.1. Các thi t b HMI truy n th ng ...........................................................23
2.2.2. Các thi t b HMI hi
2.3. THI T B S

i...................................................................23

LÝ TÍN HI

.............................................26

2.3.1. Gi i thi u v loadcell .........................................................................26
2.3.1.1. C u t o ........................................................................................27
2.3.1.2. Nguyên lý ho

ng ..................................................................28

2.3.1.3. Các thông s k thu
2.3.1.4 .

ng d

2.3.2. B khu

n ......................................................29
tài .....................................................30

i Loadcell chu n công nghi p ......................................31

2.3.3. Module analog....................................................................................32
2.3.3.1. Gi i thi u chung v module analog ............................................32


2.3.3.2. Nguyên lý ho

ng chung c a các c m bi n và các tín hi

chu n trong công nghi p. .........................................................................32
2.3.3.3. Gi i thi u v module analog EM235..........................................33
. THI

T K , XÂY D NG H TH NG

3.1. THI T K T
3.2. XÂY D

U KHI N ................41

U KHI N ..................................................................41
.....................................................46

3.2.1. Gi i thi u ph n m m STEP7 MicroWin............................................46
u khi n plc...............................................................54
3.3. XÂY D

.....................................................69

3.3.1. Gi i thi u ph n m m WINCC FLEXIBLE 2008 ..............................69
3.3.2. Giao di n màn hình HMI ...................................................................75

K T LU N ..........................................................................................................80
L IC

........................................................................................................3

TÀI LI U THAM KH O....................................................................................81


L IM

U

c

Sinh viên


GI I THI U T NG QUAN
1.1 GI I THI U CHUNG

càng

mình.

giao d

1.2 GI I THI U H TH

2toàn.

các




Hình 1.4 Hai thùng cân riêng

g loadcell


sát màn hình


NG 2.

CÁC THI T B

U KHI N H TH NG

2.1 GI I THI U PLC S7 200 CPU 224
2.1.1 T ng quát v PLC

Hình 2.1 Hình dáng bên ngoài plc S7 200


y tính

là các

Relay .


2.1.2 C u trúc , nguyên lý ho

ng c a PLC

2.1.2.1 C u trúc

- M t b nh

m r ng

thêm m t s b nh ngoài EPROM ).
- M t b vi x lý có c ng giao ti p dùng cho vi c ghép n i v i
PLC .
- Các Modul vào /ra.

2.1.2.2 Nguyên lý ho

ng c a PLC

x lý trung tâm

H th ng bus


- Address Bus

a ch

truy

a ch

n các

Modul khác nhau.
- Data Bus
- Control Bus
u khi

song song.

B nh

ng b các ho

truy n d li u.
u khi

truy n các tín hi

ng trong PLC .

nh


EPROM (Electrically Programmab

nên t
dài .


- Các PLC lo i nh có th ch a t 300 ÷1000 dòng l nh tùy vào
công ngh ch t o .
- Các PLC lo i l
t

2000 ÷16000 dòng l nh.

EPROM.
Các ng vào ra I / O

2.1.3 X

c t 1K ÷ 16K, có kh

a


m

2.1.4 PLC SIMATIC S7-200 CPU 224
S7-

-

-224.

Hình 2.3 Hình dáng bên ngoài plc S7 200 CPU 224

CPU-

Timer 1ms, 16 Timer 10ms và 108 Timer 100ms.

688

xung.