2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

C

h

n

g

1

H thng thng tin cng nghip

2/11/2006

4.6 K thut truyn dn

2

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

4.6 K thut truyn dn

1. Phng thc truyn dn tn hiu2. RS-2323. RS-4854. MBP

3

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

1. Phng thc truyn dn tn hiu Truyn khng i xng khng i xng hay n cc

(unbalanced mode, single-ended mode): s dng in p chnh lch gia mt dy dn v t V d: RS-232

D RVo Vi

4

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

u nhc im ca phng thc n cc

Tit kim dy dn Kh nng khng nhiu km (nhiu ngoi, nhiu xuyn

m - crosstalk, chnh lch in p t) Phi s dng mc tn hiu cao (hu qu?) Tc truyn km (ti sao?) Khong cch truyn ngn (ti sao?)

5

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Phng thc chnh lch i xng (balanced differential mode): s dng in p chnh lch gia hai dy dn A v B

(hoc - v +) V d: RS-422, RS-485, MBP (IEC-611582)

D RT

A

BT

VCM

VCM: Common Mode Voltage

6

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

u nhc im ca phng thc chnh lch i xng

Khng tit kim dy dn lm Kh nng khng nhiu tt C th s dng mc tn hiu thp Tc truyn cao Khong cch truyn ln

7

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

2. RS-232 Tn chnh thc: EIA/TIA-232, do Electronic Industry

Association v Telecommunication Industry Association cng xy dng

Tn thng dng: RS-232 (RS: Recommended Standard) Cc phin bn: RS-232c, RS-232f, chun s dng cho cng

COM ca my tnh c nhn thng l RS-232c Tng ng vi chun chu u l CCITT V.24)

DTE DTEMODEM(DCE)

MODEM(DCE)

VIN THNG

NG RS-232

8

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Mc tn hiu

Phng thc truyn: n cc

+15V

+3V

-3V

0

1

D R

+25V

-25V

-15V

P

h

m

v

i

l

m

v

i

c

c

h

o

p

h

p

K

h

u

v

c

q

u

Giao dinRS-232

9

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Mt s c im c bn Phng thc truyn dn khng i xng Ch truyn hai chiu ng thi (full duplex) Ghp ni im-im Tc truyn thp (chun: 19.2 kbps) Khong cch truyn ngn (thng thng 15-30m) ng dng ch yu:

Ghp ni PC-PC, PC-Modem Ghp ni PC-PLC Ghp ni PC hoc PLC vi cc thit b o, thit b thu

thp d liu, ....

10

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Giao din c hc

DSR Data Set ReadyRTS Request To SendCTS Clear To SendRI Ring Indicator

DCDRxDTxDDTRGND

DSRRTSCTS

RI

DCD Data Carrier DetectRxD Receive DataTxD Transmit DataDTR Data Terminal ReadyGND Ground

DCDRxDTxDDTRGNDDSRRTSCTSRI

(a) S gic cm DB-9 (b) S chiu tn hiu

11

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

V d ghp ni

TxD

RxDRTS

CTSDTR

DSR

GND

TxD

RxDRTS

CTSDTR

DSR

GND

TxD

RxDRTS

CTSDTR

DSR

GND

TxD

RxDRTS

CTSDTR

DSR

GND

Transmit Data

Receive Data

Request To Send

Clear To Send

Data Terminal Ready

Data Set Ready

Ground

b) Ch bt tay a) Cu hnh ghp ni ti thiu

12

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

3. RS-485

Tn chnh thc EIA/TIA-485, phin bn mi nht lEIA/TIA-485b

Truyn chnh lch i xng => cc u im nu L chun c s dng thng dng nht trong cc h

thng truyn thng cng nghip (Profibus FMS/DP, Interbus, AS-Interface v cc giao thc ring khc...)

13

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Qui nh mc tn hiu

+5V

+1.5V/+0.2V

-1.5V/-0.2V

0

1

+6V

-6V

-5V

P

h

m

v

i

l

m

v

i

c

c

h

o

p

h

p

K

h

u

v

c

q

u

14

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Cu hnh ghp ni hai dy

D

RR

D

DR

DR

RT RT

15

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Cu hnh ghp ni 4 dy

D RRT

R D

DR

RT

RT

RT

DR

Master

Slave

Slave

Slave

16

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Mt s c im c bn Phng thc truyn dn chnh lch i xng Ch truyn ch yu l hai chiu gin on Ghp ni nhiu im, s trm ti a/on mng l 32

(ti sao?) Tc truyn cao (c th ti > 10Mbps) Khong cch truyn ln (c th ti 1200m) C th dng ti 3 b lp (4 on mng), trong thc t

c th hn Tr u cui: 100 hoc 120Ohm

17

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Quan h gia tc truyn v khong cch truyn (s dng i dy xon AWG 24)

3

30

300

3000

100 1k 10k 100k 1M 10M

Tc truyn (bit/s)

C

h

i

u

d

i

d

y

(

m

)

1200

12

18

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

Ti sao s trm l 32? Theo qui nh chun, mt

b kch thch tn hiu phi m bo dng tng cng 60mA va cung cp cho: Hai tr u cui mc song

song tng ng ti 60(120 ti mi u) vi in p ti thiu 1,5V => 25mA

32 ti n v mc song song vi dng 1mA qua mi n v ti (trng hp xu nht) => 32mA.

-7V -3V

12V5V

-0.8mA

1mA

Khi nim n v ti

19

2

0

0

4

,

H

O

N

G

M

I

N

H

S

N

4.6 K thut truyn dn 2005 - HMS

4. MBP (IEC 61158-2)

MBP (Manchester Coded, Bus-Powered): ng dng ch yu trng cng nghip ch bin Kh nng dng trong mi trng yu cu an ton chy

n M Manchester, truyn ng b Kh nng ng ti ngun Truyn chnh lch i xng, mc tn hiu chnh lch

0,75-1V Tc truyn 31,25kbps (c nh) S trm ti a 32/on, 126/ton mng, ti a 4 b lp Khong cch truyn ti a 1900m/on => 9500m/ton

mng Tr u cui 100Ohm p dng trong Foundation Fieldbus, Profibus-PA

H thng thng tin cng nghip 4.6 K thut truyn dn1. Phng thc truyn dn tn hiuu nhc im ca phng thc n ccu nhc im ca phng thc chnh lch i xng2. RS-232Mc tn hiuMt s c im c bnGiao din c hcV d ghp ni3. RS-485Qui nh mc tn hiuCu hnh ghp ni hai dyCu hnh ghp ni 4 dy Mt s c im c bnQuan h gia tc truyn v khong cch truyn (s dng i dy xon AWG 24) Ti sao s trm l 32?4. MBP (IEC 61158-2)

/ColorImageDict > /JPEG2000ColorACSImageDict > /JPEG2000ColorImageDict > /AntiAliasGrayImages false /CropGrayImages true /GrayImageMinResolution 300 /GrayImageMinResolutionPolicy /OK /DownsampleGrayImages true /GrayImageDownsampleType /Bicubic /GrayImageResolution 300 /GrayImageDepth -1 /GrayImageMinDownsampleDepth 2 /GrayImageDownsampleThreshold 1.50000 /EncodeGrayImages true /GrayImageFilter /DCTEncode /AutoFilterGrayImages true /GrayImageAutoFilterStrategy /JPEG /GrayACSImageDict > /GrayImageDict > /JPEG2000GrayACSImageDict > /JPEG2000GrayImageDict > /AntiAliasMonoImages false /CropMonoImages true /MonoImageMinResolution 1200 /MonoImageMinResolutionPolicy /OK /DownsampleMonoImages true /MonoImageDownsampleType /Bicubic /MonoImageResolution 1200 /MonoImageDepth -1 /MonoImageDownsampleThreshold 1.50000 /EncodeMonoImages true /MonoImageFilter /CCITTFaxEncode /MonoImageDict > /AllowPSXObjects false /CheckCompliance [ /None ] /PDFX1aCheck false /PDFX3Check false /PDFXCompliantPDFOnly false /PDFXNoTrimBoxError true /PDFXTrimBoxToMediaBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXSetBleedBoxToMediaBox true /PDFXBleedBoxToTrimBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXOutputIntentProfile () /PDFXOutputConditionIdentifier () /PDFXOutputCondition () /PDFXRegistryName () /PDFXTrapped /False

/Description > /Namespace [ (Adobe) (Common) (1.0) ] /OtherNamespaces [ > /FormElements false /GenerateStructure true /IncludeBookmarks false /IncludeHyperlinks false /IncludeInteractive false /IncludeLayers false /IncludeProfiles true /MultimediaHandling /UseObjectSettings /Namespace [ (Adobe) (CreativeSuite) (2.0) ] /PDFXOutputIntentProfileSelector /NA /PreserveEditing true /UntaggedCMYKHandling /LeaveUntagged /UntaggedRGBHandling /LeaveUntagged /UseDocumentBleed false >> ]>> setdistillerparams> setpagedevice