Sime MURELLE HE 50 R Manual De Usario página 76

Refer to section 3.3 to access the INSTAL-
LER PARAMETERS section.
ATTENTION: In sequence/cascade instal-
lations, it is mandatory to arrange the
thermal system with the hydraulic sepa-
rator and safety devices.
The boiler is provided with the board RS-
485 that permits to manage up to 8 boi-
lers in cascade and communication in
MODBUS. The board is placed on the back
ON
1 2 3
76
of the control panel. Access the board and
chose the desired operating mode (CASCA-
DE or MODBUS) by selecting the DIP SWIT-
CH of the board as indicated in figure 4/a.
CASCADE mode (fig. 4/b)
Electrically connect all the boilers that form
the modular cascade thermal system and
set installer parameters PAR 15 on every
single boiler as indicated in fig. 4/b.
DIP SWITCH
GESTIONE IN CASCATA
CASCADE MANAGEMENT
MODBUS mode (fig. 4/c)
The RS-485 board can be used for MOD-
BUS communication of every MURELLE HE
50 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.
x 2
DIP SWITCH
ON
GESTIONE IN MODBUS
MODBUS MANAGEMENT
1 2 3
Fig. 4/a