&MGPEVDU.5
17 Mini-network
The mini-network can manage up to 9 units from a unique
room thermostat, provided that they all have the same control
system (CTS).
The unit to which the thermostat is connected is the Master
unit and acts as the user’s interface.
The slave units repeat the settings of the master unit (mode,
status, ventilation , set-point etc. )
TO REALIZE A MININETWORK
• the units must be equipped with the same type of
electronics (all rooms or all spaces).
• the units must be equipped with a serial card.
• Decide the master and set P40=1, on the slave units P40
switches to 0 (default).
• Connect the thermostat, if any, to the master.
• Connect the units to each other with the BUS typology
and follow the RS 485 indications.
• set P33=1, P34=1, P35=0 (the two last are default values)
on all the units.
RS 485 SERIAL LINE
General indications
CLIVET SPA is not responsible for any malfunctioning due to
the inobservance of the recommendations of this chapter;
moreover, it will not perform any set-ups of the plant (or the
warranty conditions will not be valid any longer) until all the
above-mentioned conditions are activated.
Page 46
SERIAL CONVERTER
The terminal units must be networked by a serial converter .
it is necessary to address the RS-485 MODULE by S3, S4,
S5 ; allowed and valid addresses from 1 to 127
S5 - it sets the address hundreds :
ON = 100, OFF = 0
S3 - it sets the address dozens
S4 - it sets the address units
S1 - 485 terminator : ON = termination YES
S2 - line polarizer
Inside the 485 network must be polarized only one board,
usually is polarized tha master, i.e. the PC;
in this case S2 = OFF = polarization NO
If more cards are polarized, faults occur
J1 - RS 485 serial
J3 - TTL serial
LV = green led : ok
LR = red led quick flashing:
wrong address
faulty module
J
3
S3
S4
ON
ON
S1
S2
ON
RS485
LR
LV
J1
G
N
D
+
-
S5
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