low frequency rs485 interfaces

6
©Contrinex 2013 - JDC PPT_LF_Interfaces Low frequency RS485 interfaces J.-D. Chatelain

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Low frequency RS485 interfaces. J.-D. Chatelain. RWM 1. RWM 2. RWM 3. RWM 4. RWM 2. RWM 3. RWM 4. RWM 1. RWM 1. Interface 1. Interface 2. Interface 3. Power supply. Fieldbus. Reference RxTx(PC) TxRx(PC). 1. 0. RS485 Interfaces - Internal connector. Power supply - PowerPoint PPT Presentation

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Page 1: Low frequency RS485 interfaces

©Contrinex 2013 - JDCPPT_LF_Interfaces

Low frequencyRS485 interfaces

J.-D. Chatelain

Page 2: Low frequency RS485 interfaces

Interface 2

RWM 1

RWM 3RWM 2

Power supply

Fieldbus

RWM 1 RWM 4 RWM 2 RWM 3 RWM 4

Interface 1 Interface 3

RWM 1

Page 3: Low frequency RS485 interfaces

DIP

-sw

itch

Ad

dre

ss s

ele

ctio

n

Re

fere

nce

A BRe

fere

nce

Rx

Tx(

PC

)T

xR

x(P

C)

Ou

tpu

t 1

Ou

tpu

t 2

Ou

tpu

t 3

Ou

tpu

t 4

V+

ref

V-r

ef

Diff

eren

tial v

olta

ge

for

Out

puts

5V

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ence

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Diff

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olta

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Inpu

t

GN

DG

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usin

g

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Pow

er s

uppl

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iffer

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5

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01

RS485 Interfaces - Internal connector

Page 4: Low frequency RS485 interfaces

The interface is poweredRWM 2 is correctly connectedAll the possibilities are programed by means of the configuration display or the CF command

There are many possibilities to program the OUTPUTs. One of them is to set the OUTPUT when a transponder is present in front of the corresponding RWM

A transponder is in front of RWM 2There is a communication problem with RWM 2RWM 2 is communicating with the transponderRWM 2 is communicating with the transponderNow, there are transponders in front of RWM 2, 3 and 4

Another possibility is to clear the OUTPUT when a transponder is present in front of the corresponding RWM

RS485 Interfaces - Meaning of the LEDs

Page 5: Low frequency RS485 interfaces

These are the codes obtained when reading the outputs(Command OR)

or the codes entered to force the outputs (Command OW).

00010203040506070809101112131415

RS485 Interfaces - Coding the OUTPUTs

Page 6: Low frequency RS485 interfaces

©Contrinex 2013 - JDCPPT_LF_Interfaces

Low frequencyRS485 interfaces

J.-D. Chatelain

End of this chapter