Transcript Diapositive 1

Low frequency
RS485 interfaces
J.-D. Chatelain
©Contrinex 2013 - JDC
PPT_LF_Interfaces
RWM 1
RWM 2
RWM 3
RWM 4
RWM 2
RWM 1
Interface 1
Interface 2
RWM 3
RWM 4
RWM 1
Interface 3
Power supply
Fieldbus
Switch
Reset button
1
0
RS232
RS485
DIP-switch
Address selection
Reference
A
B
Reference
Rx
Tx(PC)
Tx
Rx(PC)
V+
Power supply
Differential voltage
VGND Ground for housing
IN+
Differential voltage
for Input
IN÷ Reference
5V
V+ref
Differential voltage
for Outputs
V-ref
Output 1
Output 2
Output 3
Output 4
RS485 Interfaces - Internal connector
RS485 Interfaces - Meaning of the LEDs
Another
The
All
A
There
RWM
Now,
transponder
the
interface
there
2is
are
possibilities
ispossibility
a communicating
correctly
many
communication
areisispowered
in is
front
areto
connected
programed
possibilities
of
problem
with
transponders
clear
RWM
the
the2transponder
with
OUTPUT
by
toRWM
in
means
program
front
when
2 of a
the OUTPUTs.
RWM
transponder
configuration
2, 3 andis4One
present
display
of in
or theof
them
front
isCF
to
the
command
set the
OUTPUT when aRWM
corresponding
transponder is present in
front of the
corresponding RWM
RS485 Interfaces - Coding the OUTPUTs
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
These are the
codes obtained
when reading the
outputs
(Command OR)
or the codes
entered to force
the outputs
(Command OW).
Low frequency
End
of this
chapter
RS485
interfaces
J.-D. Chatelain
©Contrinex 2013 - JDC
PPT_LF_Interfaces