Default interface parameter
•
Baudrate = 19200
•
Bits = 8
•
Parity = Even
•
Stop bits = 1
•
Handshake = none
Information
•
Addressing is performed depending on version by display, an external terminal or a
PC with the appropriate software (automatic addressing following chapter).
•
The MODBUS register description and the information sheet
“
Network structure of
MODBUS
”
can be requested from our Support Department V-STE for control systems
- ventilation.
5.7.1 Automatic addressing
Automatic addressing can be started when the connections
“
ID1
”
and
“
ID2
”
for
“
Address-
ing
”
are connected with each other additionally next to the bus connection. I. e. it is no
longer necessary to address every user manually in the network.
16.05.2018
v_modbus_autoadr_ctg_cpg_c.vsd
A
(D+)
B
(D-)
GND
M
O
D
B
U
S
(R
S
-4
8
5
)
A-G-247NW
ID1
GND
A
(D+)
B
(D-)
ID2
GND
A
(D+)
B
(D-)
B
(D-)
ID1
GND
A
(D+)
B
(D-)
ID2
GND
A
(D+)
MODBUS
(RS-485)
MODBUS
(RS-485)
A
d
d
re
s
s
in
g
A
d
d
re
s
s
in
g
MODBUS
(RS-485)
MODBUS
(RS-485)
A
d
d
re
s
s
in
g
A
d
d
re
s
s
in
g
Connection at MODBUS Master via the terminals: A (1D+), B (1D-), ID and GND
Connection of the Slave members via the terminals: A (D+), B (D-), GND and ID1 / ID2
Information
•
Except the data link
“
A (D+)
”
,
“
B (D-)
”
the
“
ID1 - ID2
”
and the
“
GND
”
connection may no
further cable cores of the data line be used.
•
The connections for the automatic addressing
“
ID1
”
and
“
ID2
”
are not directly
connected with each other. These may not be bridged; any order of connection is
possible.
•
If a repeater is necessary and automatic addressing should be carried out, only the
repeater of the Z-G-1NE type can be used, only it can relay the addressing signal.
Operating Instructions
UNIcon
CTG-150AVC
Electrical installation
L-BAL-E287-GB 2015 Index 004
Part.-No.
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