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82
MODBUS mode (fig. 4/c)
The
RS-485
board can be used for MOD-
BUS communication of every
MURELLE HE
35 R (M)
boiler.
In this case, proceed as follows:
- Set the DIP SWITCH of the
RS-485
board and the PAR 16 as indicated in the
figure.
- Choose the communication configuration
suited to the MODBUS network (PAR 17
INST) according to
Table PAR 17 INST
.
MODBUS mode (fig. 4/d)
This mode allows for MODBUS communica-
tion of at least two boilers in cascade and is
performed by requesting another
RS-485
board provided in the kit code 8092244.
SCHEDA CALDAIA
DIP SWITCH
SCHEDINO RS-485
1
2
3
CONNETTORE
CABLATO CN10
(cod. 6319165)
1
2
34
5
6
WIRED CONNECTOR CN10
(code 6319165)
COMUNICAZIONE MODBUS
MODBUS COMMUNICATION
RS-485 BOARD
/ BOILER BOARD
ON
–
+
GND
–
+
GND
Fig. 4/c
1
1200
8
No
1
2
1200
8
No
2
3
1200
8
Pari /
1
4
1200
8
2
5
1200
8
Dispari /
1
6
1200
8
2
7
2400
8
No
1
8
2400
8
No
2
9
2400
8
1
10
2400
8
2
11
2400
8
1
12
2400
8
2
13
4800
8
No
1
14
4800
8
No
2
15
4800
8
1
16
4800
8
2
17
4800
8
1
18
4800
8
2
19
9600
8
No
1
20
9600
8
No
2
21
9600
8
1
22
9600
8
2
23
9600
8
1
24
9600
8
2
25
19200
8
No
1
26
19200
8
No
2
27
19200
8
1
28
19200
8
2
29
19200
8
1
30
19200
8
2
PAR 17 INST
Baud Rate
N° Bit Dati
Parità
Bit di Stop
Par 17 INST
Baud Rate
No. Data Bit
Parity
Stop Bit
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Even
Even
Even
Even
Even
Even
Even
Even
Even
Even
Odd
Odd
Odd
Odd
Odd
Odd
Odd
Odd
Odd
Odd
TABELLA PAR 17 INST/ Tab. PAR 17 INST
INSTALLER PARAMETER SETTING:
PAR 16
MODBUS ADDRESS
-- = Not enabled
1...31 = Slave from 1 to 31
(ATTENTION: Avoid calling the boi-
ler with the same number assigned
to either appliances)
PAR 17
MODBUS CONFIGURATION
-- = Not enabled
1...30 = Default value: 25
(See
Table PAR 17 INST
)
ATTENTION: Upon setting the parameters, we
recommend turning the boiler off and then back on
again.
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