Addressing Member Modbus Master Interface - Helios EUR EC Instructions D'installation Et D'utilisation

Installation and Operating Specification EUR EC
The data line must be connected from one device to the next. No other type of wiring is allowed!
Always use only two wires of one lead (twisted pair) for the connection.
MODBUS connection
26.02.2007
v_modbus_verbindung.vsd
Shielding
The use of shielded cables is normally not needed but offers high protection against electromagnetic
interferences, especially high frequencies. However, the effectiveness of the shield depends on care-
ful installation of the line.
If shielded cables are used, the shield should be placed at "PE" on at least one side (preferably on the
master connection). The occurrence of compensating currents may have to be considered if the shield
is contacted on both sides.
5.9.1

Addressing member MODBUS Master Interface

Up to 32 members can be connected at the MODBUS Master interface.
No other components are required for the patented automatic addressing (activation
MODBUS Master: AutoAddressing). Only the connections "ID1" and "ID2" of the Slave members are
connected additionally next to the bus connection and at the "ID" connection of the MODBUS Master
for this.
The "ID" connection of the MODBUS Master must be connected to the "ID1" or "ID2" connection of the
first Slave member. This is recognised as a result and occupied by address 1.
For the following users the connection "ID1" or "ID2" of a Slave user respectively is connected with
connection "ID1" or "ID2" of the next Slave user.
The automatic addressing of other users is initiated by the previous user via this connection.
The individual members can be addressed in advance without this device by an external terminal or a
PC.
Alternatively the addressing can be done manually by a separate hand held terminal or PC software,
the appropriate number of members must then be entered on the MODBUS Master (
MODBUS Master).
Information
If a repeater is necessary and automatic addressing is to be carried out, only certain repeaters that
•
relay the addressing signal can be used.
Depending on the version, the connections for MODBUS "A (D+)", "B (D-)" are available single or
•
double at the Slave members. These are connected with each other internally electrically.
The connections for the automatic addressing "ID1" and "ID2" of the Slave members are not
•
directly connected with each other. These may not be bridged; any order of connection is possible.
The communication parameters are fixed
•
L-BAL-E274-GB 1914 Index 003
MODBUS
Shield connection correct
Recommended wire types
1. CAT5 / CAT7 cables
2. J-Y (St) 2x2x0.6 (telephone cable)
3. AWG22 (2x2 twisted pair)
Max. allowed wire length 1000 m (CAT5/7 500 m)
Shield connection incorrect
Programming: Menu group MODBUS Master.
Part.-No.
12/117
Electrical installation
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