Sime MURELLE HM - MODBUS mode (fig. 4;c); CASCADE+MODBUS mode (fig. 4;d)

86
MODBUS mode (fig. 4/c)
The RS-485 board can be used for MOD-
BUS communication of every MURELLE
HM 25 T - 35 T 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.
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.
SCHEDA CALDAIA
DIP SWITCH
SCHEDINO RS-485
1
2
3
CO
NNETT
O
R
E
C
ABLAT
O
C
N1
0
(
cod. 6319165
)
1
2
345
6
WIRED CONNECTOR
CN10
(code 6319165)
COMUNICAZIONE MODBUS
MODBUS COMMUNICATION
RS-485 BOARD
/ BOILER BOARD
ON
–
+
GND
–
+
GND
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.
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