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SM211
RS485 - JBUS/MODBUS®for SM103E
§
User instructions
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Contents
Preliminary operations ................................................... 1
§
General informations...................................................... 1
Installation ...................................................................... 2
Programmation............................................................... 3
Communication address............................................... 4
Communication speed ................................................. 4
Communication parity.................................................. 5
Communication stop bit ............................................... 5
Communication .............................................................. 6
The standard communications frame............................... 6
Communication table................................................... 6
Technical characteristics ............................................... 6
Glossary of abbreviations.............................................. 6
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Preliminary operations
N 1
R = 12 0
repeater
RS48 5
0+- -+0
N n
R = 120
1200 M 1200 M
N 1 N 2 N n
R = 120
1200 M
R = 120
For personnel and product safety please read the
contents of these operating instructions carefully before
connecting.
Check the following points as soon as you receive the
package:
General informations
Functions
The optional IP Communication module must be connected
to the SM103E. It provides an RS485 serial link (2 or 3 wires)
with JBUS/MODBUS®protocol for the use of SM103E from
a PC or PLC.
• the packing is in good condition
• the product has not been damaged during transit
• the product reference number conforms to your order
• the package contains the product and the operating
instructions.
General points
For a standard configuration, an RS485 link is used to
connect up to 31 SM102E or SM103E with a PC or a PLC
over a distance of 1200 metres, using JBUS/MODBUS
protocol.
®
Programmable controllers
Other systems
Programmable controllers
Other systems
Recommendations
You should use a shielded twisted pair (LIYCY type). In a
disturbed environment or large network (in terms of
length) we recommend the use of a shielded twisted pair
(type LIYCY-CY).
A repeater (1 channel) or an arrestor (4 channels) should
be used if you intend to exceed the distance (1200 m.)
and/or maximum number (31) of SM103E.
Please contact us for more information.
repeater
N.B.
A 120 ohm resistance (found on the additional module)
must be fixed at both ends of the link.
1
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Installation
ON
1
NO
1
-
V0+
=R
0
2
1
The SM103E product must be disconnected.
Fix the module in one of the
23 1
four positions.
4 Follow indications when connecting the terminal.
Switch on voltage supply.
Notes
2
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Programming
p.451
p.451
p.452
p.452
Previous menu
Following menu
3
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x 3
x 2
x 1
confirm
Programming
x 1
x 1
x 1
confirm
Communication address
Example: COM ADR = 7
Communication speed
Example: BDS = 19 200 bauds
4
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x 1
x 1 (Odd)
x 2 (Even)
x 3 (No)
Programming
x 1
x 1
confirm
x 1 (2 bits)
x 2 (1 bits)
Communication parity
Example: PAR = Even
Communication stop bit
Example: STOP = 2
5
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Communication
The JBUS/MODBUS®used by the SM103E involves a
dialogue using a master-slave hierarchical structure.
There are two possible dialogues:
• the master communicates with a slave and waits for its
reply.
• the master communicates with all the slaves without
waiting for their reply.
The mode of communication is the RTU (Remote Terminal
Unit) using hexadecimal characters of at least 8 bits.
The standard communications frame
The standard communications frame consists of:
Slave address Function code Address Data CRC 16
According to the JBUS/MODBUS®protocol, transmission
time must be less than 3 silences, i.e. the emission time
of 3 characters so that the message is processed. To
correctly use information, the following functions are
important:
3 : to read n words (maximum 128).
6 : to write one word.
8 : to diagnose exchanges between the master and the
slave via meters 1, 3, 4, 5 and 6.
16 : to write n words (maximum 128).
N.B.
When selecting slave address 0, a message is sent to all
the instruments present on the network (only for functions
6 and 16)
Comment
T he response time (time out question/answer) is 250 ms
maximum.
C ommunication table
The communication tables are available on the CD-Rom supplied with the RS485 JBUS/MODBUS®for SM103E.
Technical characteristics
RS485 2 or 3 wires half duplex
Protocole JBUS/MODBUS®/mode RTU
Speed 2400 to 38400 Bauds
Galvanic insulation 4 kV
Glossary of abbreviations
COM Communication
ADR Slave address
BDS Speed of communication in bauds
PAR Communication frame parity
NO Without parity
Even Even parity
Odd Odd parity
STOP Frame-stop beep
1 1 stop bit
2 2 stop bits
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540300B_GB
Hager 12.2011 OCOM 113007
www.hager.com
6S5079-02b
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