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:
COMUNICAZIONE MODBUS
MODBUS COMMUNICATION
GND
+
–
GND
+
–
TABELLA PAR 17 INST/ Tab. PAR 17 INST
PAR 17 INST
Par 17 INST
82
- 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.
DIP SWITCH
CONNETTORE
CABLATO CN10
ON
(cod. 6319165)
WIRED CONNECTOR CN10
1 2
3
(code 6319165)
SCHEDINO RS-485
RS-485 BOARD
/ BOILER BOARD
SCHEDA CALDAIA
Baud Rate
Baud Rate
1
1200
2
1200
3
1200
4
1200
5
1200
6
1200
7
2400
8
2400
9
2400
10
2400
11
2400
12
2400
13
4800
14
4800
15
4800
16
4800
17
4800
18
4800
19
9600
20
9600
21
9600
22
9600
23
9600
24
9600
25
19200
26
19200
27
19200
28
19200
29
19200
30
19200
INSTALLER PARAMETER SETTING:
PAR 16
PAR 17
ATTENTION: Upon setting the parameters, we
recommend turning the boiler off and then back on
again.
N° Bit Dati
Parità
No. Data Bit
Parity
8
No
8
No
8
Pari /
Even
Pari /
Even
8
8
Dispari /
Odd
Dispari /
8
Odd
8
No
8
No
Pari /
Even
8
Pari /
Even
8
8
Dispari /
Odd
8
Dispari /
Odd
8
No
8
No
Pari /
8
Even
Pari /
Even
8
Dispari /
Odd
8
Dispari /
8
Odd
8
No
8
No
Pari /
Even
8
Pari /
Even
8
Dispari /
8
Odd
Dispari /
Odd
8
8
No
8
No
Pari /
Even
8
Pari /
Even
8
Dispari /
Odd
8
Dispari /
Odd
8
CASCADE+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.
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)
MODBUS CONFIGURATION
-- = Not enabled
1...30 = Default value: 25
(See Table PAR 17 INST)
Bit di Stop
Stop Bit
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
Fig. 4/c