tap lenh plc

8/3/2019 Tap Lenh PLC

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Chng 3:Chng 3:

TATAP LEP LENH CUNH CUA PLCA PLC

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I.I. CACAU TRUU TRUC CUC CUA MOA MOT PLC:T PLC:

Boieu khien lap trnh (PLC:Boieu khien lap trnh (PLC:PProgrammablerogrammableLLogicogic CController) c thiet kenham thay theontroller) c thiet kenham thay thephng phap ieu khien truyen thong dung rle vaphng phap ieu khien truyen thong dung rle vathiet bri cong kenh. Notao ra mot khanang ieuthiet bri cong kenh. Notao ra mot khanang ieu

khien thiet bdedang valinh hoat da tren viec lapkhien thiet bdedang valinh hoat da tren viec laptrnh tren cac lenh logic c ban.trnh tren cac lenh logic c ban.


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II. TAII. TAP LEP LENH S7_200NH S7_200

1. Nhom lenh xuat nhap c ban1. Nhom lenh xuat nhap c ban

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II. TAII. TAP LEP LENH S7_200NH S7_2001. Nhom lenh xuat nhap c ban1. Nhom lenh xuat nhap c ban


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1. Nhom lenh xuat nhap c ban1. Nhom lenh xuat nhap c ban

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II. TAII. TAP LEP LENH S7_200NH S7_2001. Nhom lenh xuat nhap c ban1. Nhom lenh xuat nhap c ban

V du1: Mach ao chieu quay ong c KB 3 pha.V du1: Mach ao chieu quay ong c KB 3 pha.

Inputs: 3 (Thuan, Nghch, vaDng.)Inputs: 3 (Thuan, Nghch, vaDng.)Outputs: 2 (KOutputs: 2 (Kthuanthuan ,K,KNghchNghch ))


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Dang STL

T

RNI0.0 Q0.0

I0.1 Q0.1

I0.2

T

NN

D

N

T

220VACCOM

24VDC

S oket noi I/OS oket noi I/O

Chng trnh LADChng trnh LAD

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V du 2: Mach tao nut nhan ON/OFFV du 2: Mach tao nut nhan ON/OFF



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V du 3: Mach tao xung nhp vi tan so0,5HzV du 3: Mach tao xung nhp vi tan so0,5Hz


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2. Nhom lenh ieu khien Timer :2. Nhom lenh ieu khien Timer :

Timer tao thi gian trekhong conhcongha lakhitn hieu logic vao IN mc khong th Timer sebReset.

Timer tao thi gian treconh(Retentive) congha lakhi tn hieu logic vao IN mc khong th Timer naykhong chay na nhng khi tn hieu len mc cao lai thTimer lai tiep tuc chay tiep.

KetCPU 214 trlen co128 Timer c chia lam hailoai khac nhau ola:


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2. Nhom lenh ieu khien Timer :2. Nhom lenh ieu khien Timer :Time co3 ophan giai ola1ms, 10ms va100ms

T5T31,T69T95

3276,7s100ms

T1T4,T65T68

327,67s10ms

T0, T6432,767s1ms

TONR

T37T63,T101T127

3276,7s100ms

T33T36,T97T100

327,67s10ms

T32, T9632,767s1ms

TON

CPU214Giatrcc aiophan giaiLenh

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2. Nhom lenh ieu khien Timer :2. Nhom lenh ieu khien Timer :


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V du 1: Chng trnh ieu khien ong c K saoV du 1: Chng trnh ieu khien ong c K sao--tam giactam giac Yeu cau: Y eu cau:

--Thi gian chuyen tsao sang tam giac la2sThi gian chuyen tsao sang tam giac la2s

-- Dung 1 nut nhan ON/OFFDung 1 nut nhan ON/OFF-- Khi Relay nhiet tac ong th bao en nhap nhayKhi Relay nhiet tac ong th bao en nhap nhay

I0.0 Q0.0

I0.1 Q0.1

Q0.2

Q0.3

24V COM

RN

RN

ALARM

220VAC

K

ON/OFF

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V du 1:V du 1:Chng trnh LADChng trnh LAD


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V du 2:V du 2:Chng trnh trochi Vui eHoc:Chng trnh trochi Vui eHoc:

Yeu cauY eu cau::-- C 3 ngi chi v 1 Dn chng trnhC 3 ngi chi v 1 Dn chng trnh

-- Ti v tr mi ngi chi c 1 n t nhn v 1 nTi v tr mi ngi chi c 1 nt nhn v 1 n-- Khi mt trong 3 ngi chi nhn th n ti v tr s ng vKhi mt trong 3 ngi chi nhn th n ti v tr sn g v chungchungku trong 3s v cc ngi chi khc nhn th khng c t c dng.ku trong 3s v cc n gi chi khc nhn th khng c tc dng.

-- Nhn Reset a v trng thi ban u.Nhn Reset a v trng thi ban u.

S oket noi:S oket noi:


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3. Nhom lenh ieu khien Counter:3. Nhom lenh ieu khien Counter:

Cac boem cua S7-200 c chia lam 2 loai:a. Boem tien (CTU):


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3. Nhom lenh ieu khien Counter:3. Nhom lenh ieu khien Counter:

Boem tien/ lui (CTUD):

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II. TAII. TAP LEP LENH S7_200NH S7_2004. Nhom cac lenh so sanh:4. Nhom cac lenh so sanh:


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4. Nhom cac lenh so sanh:4. Nhom cac lenh so sanh:

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4. Nhom cac lenh so sanh:4. Nhom cac lenh so sanh:


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4. Nhom cac lenh so sanh:4. Nhom cac lenh so sanh:(Cac lenh so sanh nhohn hoac bang tng t nh so(Cac lenh so sanh nhohn hoac bang tng t nh so

sanh ln hn hoac bang)sanh ln hn hoac bang)

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V du 1:V du 1:

Mach en Giao thong:Mach en Giao thong: Yeu cau: Yeu cau:+en Xanh 25s+en Xanh 25s+en Vang 5s+en Vang 5s

+en o30s+en o30s

24VDC COM

I0.1

I0.0

Q0.5

Q0.4

Q0.3

Q0.2

Q0.1

Q0.0

220V

ON

OFFX1

V1

1

X2

2

V2


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V du 2:V du 2:

Mach en Giao thong:Mach en Giao thong: Yeu cau: Yeu cau:

Cheotay:Cheotay:+Tuyen 1: X1 va2+Tuyen 1: X1 va2+Tuyen 2: X2 va1+Tuyen 2: X2 va1

Cheot ong:Cheot ong:+en Xanh 25s+en Xanh 25s+en Vang 5s+en Vang 5s+en o30s+en o30s

24VDC COM

I0.1

I0.0

Q0.5

Q0.4

Q0.3

Q0.2

Q0.1

Q0.0

220V

ON

OFFX1

V1

1

X2

2

V2

I0.2

I0.3

T1 T2

Tay T

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V du 3: ieu khien bai au xeV du 3: ieu khien bai au xe

Yeu cau: Yeu cau:

+Neu trong bai t hn 10 xe thi mBarrier vabao en+Neu trong bai t hn 10 xe thi mBarrier vabao encho phep xe vao, Ngc lai th ong Barrier vatat en.cho phep xe vao, Ngc lai th ong Barrier vatat en.

24VDC COM

I0.1

I0.0

I0.2

Q0.1

Q0.0

220V

ON/OFFIN

Entrance

KOUT


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5. Lenh truy xuat thi gian thc:5. Lenh truy xuat thi gian thc:

Cac dlieu oc ghi vi ong hothi gian thc trongLAD vatrong STL coodai mot byte vac mahoa theo henhthap phan. Chung nam trong boemgom 8 byte nam lien nhau theo tht:

Ngay trong tuan0Byte 7

0Byte 6

Giay t059Byte 5

Phut t059Byte 4

Git023Byte 3

Ngay t031Byte 2

Thang t012Byte 1

Nam t099Byte 0


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5. Lenh truy xuat thi gian thc:5. Lenh truy xuat thi gian thc:

READ_RTC (trong LAD) hoac TODR (trong STL):Lenh oc noi dung cua ong hothi gian thc vao boem 8 byte c chthtrong lenh bang toan hang T.

SET_RTC (trong LAD) hoac TODW (trong STL):Lenh ghi noi dung cua boem 8 byte c chthtrong toan hang T vao ong hothi gian thc.


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V du1: Viet chng trnh chuong bao gihoc.V du1: Viet chng trnh chuong bao gihoc.

Yeu cau: Yeu cau:+7g vao lp, 9g ra chi, 9g30 vao lp va11g ngh+7g vao lp, 9g ra chi, 9g30 vao lp va11g ngh

+Cac ngay CN vaLeth khong keu+Cac ngay CN vaLeth khong keu

7

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6. Nhom cac lenh di chuyen dlieu6. Nhom cac lenh di chuyen dlieu

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II. TAII. TAP LEP LENH S7_200NH S7_2006. Nhom cac lenh di chuyen dlieu6. Nhom cac lenh di chuyen dlieu


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6. Nhom cac lenh di chuyen dlieu6. Nhom cac lenh di chuyen dlieu

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V du1: Viet chng trnh ieu khien 8 ong

c tD0 en D7 vi cac yeu cau sau:+ Nhan nut START th ong c D0 chay+ Nhan nut NEXT th ong c ang chay sedng laivaong c ben phai cua nochay+ Nhan nut BACK th ong c ang chay sedng laivaong c ben trai cua nochay+ Nhan nut STOP th ong c ang chay sedng lai

BACK NEXT

BANG IEU KHIEN

STOP

START

Motor 0 Motor 1 Motor 2 Motor 3 Motor 4 Motor 5 Motor 6 Motor 7


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V du2: Viet chng trnh Kiem tra chatlng san pham vi cac yeu cau sau:+ Co4 tram kiem tra (Dan nhan, chai me, conc vaong nut)

+ Co2 cam bien phat hien chai vao vachai ra.+ Neu chai nao khong thoa1 trong 4 ieu kien trenth sau khi qua 4 tram sebloai bang 1 van kh nen.

8: InputsI0.0: Start I0.3: CB tram 1

I0.1: Stop I0.4: CB tram 2

I0.2: CB chai vao I0.5: CB tram 3

I0.7: CB chai ra I0.6: CB tram 4

2: Outputs (Bang taiQ0.0vaVan kh nenQ0.1)

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7. Nhom cac lenh sohoc7. Nhom cac lenh sohoc

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II. TAII. TAP LEP LENH S7_200NH S7_2007. Nhom cac lenh sohoc7. Nhom cac lenh sohoc


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Bai tap 1:Viet chng trnh ieu khien thang

may 4 tangu tien cho ngi i thang

+I0.0, I0.1, I0.2 vaI0.3: Goi tang 1,2,3 va4 +I0.4, I0.5, I0.6 vaI0.7: Cam bien tang 1,2,3 va4 +I1.0 va I1.1latn hieu thang i len vai xuong +Q0.0 vaQ0.1: Ngora thang i len vai xuong.


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Bai tap 2:Viet chng trnh ieu khien may

mai theo yeu cau sau: +Co2 cheo: Tay vaT ong (I0.0) +I0.2: A=>B (Tay), OFF (Tong) +I0.1: B=>A (Tay), ON (T ong) +I0.3 vaI0.4: Cong tac hanh trnh tai A vaB +cheoT ong khi may ang hoat ong neu

nhan OFF th chay cho en khi veti A mi dng.

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