BMX NOM 0200 2-Way Serial Link Module BMXNOM0200.pdf

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Serial Communications
2.2
2-Way Serial Link Module BMX NOM 0200
Subject of this Section
This section introduces the serial communications on the BMX NOM 0200 module.
What's in this Section?
This section contains the following topics:
Topic
Presentation of the BMX NOM 0200 2-Way Serial Link Module
Modicon M340H (Hardened) Equipment
Grounding of Installed Modules
Installation of the Module BMX NOM 0200
BMX NOM 0200 Wiring Considerations
Page
25
30
31
33
35
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Serial Communications
Presentation of the BMX NOM 0200 2-Way Serial Link Module
General
The BMX NOM 0200 and BMX NOM 0200H
(see page 30)
serial link modules are
2-way asynchronous serial line modules supporting Modbus Serial (master or slave)
and Character Mode communications.
The BMX NOM 0200 is a simple-format, dedicated module, which can be installed
on a Modicon M340 station rack.
NOTE:
At the temperature extremes (-25... 0ºC and 60... 70ºC) (-13...32ºF) and
(140...158ºF), the BMX NOM 0200H operating characteristics are the same as the
BMX NOM 0200 characteristics within its (0…60ºC)(32...140ºF) temperature range.
Module introduction
The illustration below shows the physical characteristics of the BMX NOM 0200
module:
R
ER R
ER
N
RU UN
R
M0
CO OM0
C
M1
CO OM1
C
BM
OM
X N
L
D
00
02
This BMX NOM 0200 module is composed of the elements in the following table:
Key
1
Description
Five indicator LEDs on the front of the module:
RUN and ERR show the module's status,
COM0 displays the traffic status on the port 0 or 1 (channel 0),
COM1 displays the traffic status on the port 2 (channel 1),
DL shows the firmware download status.
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Serial Communications
Key
2
Description
Integrated channel (channel 0) dedicated to the serial link with 2 serial ports:
RS232 (port 0) and RS485 (port 1).
Note:
Only one port can be active at a time.
Integrated channel (channel 1) dedicated to the serial link with 1 serial port:
RS485 (port 2).
3
NOTE:
In some operating modes,
LEDs can indicate more specific information
(see page 26).
Visual Diagnostics
Five LEDs are located on the front panel of the BMX NOM 0200 module. They
display information about the module operating status and about the communication
status of the built-in serial link.
LED Display:
RUN
COM0
COM1
ERR
DL
RUN = The module is powered and well configured.
ERR = The module has detected an error and cannot function correctly.
DL = The firmware is being downloaded.
COM0 = Communication detected on port 0 or 1 (channel 0).
COM1 = Communication detected on port 2 (channel 1).
LED meaning:
Each LED can be in one of these states:
1 = On
0 = Off
B = Blinking
During module startup all LEDs are powered ON and OFF, this verifies that the
LEDs are functioning correctly.
ERR
_
B
1
1
COM0
_
_
_
1
COM1
_
_
_
0
DL
_
_
_
_
Diagnose
The module is not powered or non-operational.
The module is not configured.
The module improperly operative.
The module has detected a problem on the
channel 0.
RUN
0
0
1
1
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Serial Communications
RUN
1
1
1
1
1
B
B
_
_
ERR
1
1
1
0
0
B
B
_
_
COM0
1
0
B
B
_
_
B
_
_
COM1
B
1
1
_
B
_
B
_
_
DL
_
_
_
_
_
0
_
B
1
Diagnose
The module has detected a problem on the
channel 0, the channel 1 is exchanging data.
The module has detected a problem on the
channel 1.
The module has detected a problem on the
channel 1, the channel 0 is exchanging data.
The channel 0 is exchanging data.
The channel 1 is exchanging data.
The CPU is absent.
The module is performing self tests.
A module firmware is being downloaded.
The firmware is uploaded; the module must be
reset.
Serial Ports Introduction
The illustration below shows the RJ45 serial ports on the BMX NOM 0200:
N
RU UN
R
M0
CO OM0
C
M1
CO OM1
C
R
ER R
ER
OM
XN
BM
DL
00
02
1
2
3
4
5
6
7
8
8
7
6
5
4
3
2
1
The table below shows the pin assignment for the serial port on the
BMX NOM 0200:
Pin N°
1
2
3
4
RS485 channel 1 / port 1 or 2
_
_
_
D1 (B/B4)
RS232 channel 0 / port 0
RXD (Receive Data)
TXD (Transmit Data)
RTS (Request To Send)
DTR (Data Terminal Ready)
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Serial Communications
Pin N°
5
6
7
8
RS485 channel 1 / port 1 or 2
D0 (A/A4)
_
_
Potential serial link grounding (0 V)
RS232 channel 0 / port 0
DSR (Data Set Ready)
CTS (Clear To Send)
DCD (Data Carrier Detect)
Potential serial link grounding (0 V)
NOTE:
The two RS485 lines are isolated. The isolation voltage between the two serial
lines 500 V and between each isolated serial line and the backplane is up to 500V
AC.
The seven-wire RS232 and two-wire RS485 use the same female RJ45
connector. Only the signal cabling is different.
Channels Specifications
The channels of the BMX NOM 0200 module include:
Two isolated RS485 Physical Interfaces,
One non-isolated RS232 Physical Interface,
Modbus Serial (ASCII and RTU) and Character Mode communication types.
The link specifications for the two protocols are:
Modbus Serial /
RS485
Type
Flow
Master/Slave
19200 bauds.
Parameters can
be set from
300 bauds to
57600 bauds.
32
1 to 247
Modbus Serial /
RS232
Master/Slave
19200 bauds.
Parameters can
be set from
300 bauds to
115200 bauds.
32
1 to 247
Character Mode
/ RS485
Half Duplex
9600 bauds.
Parameters can
be set from
300 bauds to
57600 bauds.
_
_
Character Mode /
RS232
Full Duplex
9600 bauds.
Parameters can
be set from
300 bauds to
115200 bauds
_
_
Number of
devices
Authorized
slave
addresses
Max. length
of Bus
without
branching
1000 m (15 m
with Branching)
15 m
1000 m (15 m
with Branching
15 m
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