6
1 - GENERAL DESCRIPTION
1.9. Communication in a SHRD shared network
By default, the electronic control is confi gured for a stand-alone unit,
but it is also possible to include it in an SHRD shared network as
Master, Slave or Back-up.
The Mater/Slave network allows the exchange of data and
information between the units, and depending on the conditions of
the installation, it can share the reading of some probes installed on
the unit confi gured as “Master”, temperature setpoints, and operating
mode. The maximum number of units that can be integrated into a
Mater/Slave network is 15.
The Back-up network allows to confi gure one unit as a “Back-up”,
for activation in case of malfunction of the other unit. The maximum
number of units that can be integrated into a Back-up network is 2.
Communication between network units is via the Ethernet port of each
control board.
Unit with address 1 Unit with address 2 Unit with address 15
Graphic terminal
(shared)
Graphic terminal
(private)
Graphic terminal
(private)
FieldBus1
Display port2
Ethernet
FieldBus2
/ BMS
Display port1
/ BMS
FieldBus1
Display port2
Ethernet
FieldBus2
/ BMS
Display port1
/ BMS
FieldBus1
Display port2
Ethernet
FieldBus2
/ BMS
Display port1
/ BMS
“50FC”
1
“50FC”
2
“50FC”
15
Functionality
Important: to use any of the following functionalities it is necessary
to confi gure in the “Selection software” one unit as Master and the
others as Slaves (including the backup unit).
The SHRD network allows to have the following functionalities
depending on the parametrized confi guration:
Master/Slave:
It allows to share some of the probes installed in the Master unit:
ambient temperature or ambient temperature + humidity, outdoor
temperature, outdoor humidity and CO
2
air quality.
Extended Master/Slave:
It includes “Master/Slave” functionalities and the Master unit
provides ambient temperature setpoints to the other units.
Master/Slave with the same operating mode:
It includes the “Extended Master/Slave” functionalities and the
Master unit also provides the status (Cooling- Heating - Ventilation)
to the other units.
Back-up in case of alarm:
One of the two units is confi gured as a backup unit, for activation
in case of malfunction of the other one.
Extended Back-up:
It includes the “Back-up in case of alarm” functionalities and also,
the control manages the automatic switching between the two
units weekly, to compensate the operation times of both units.
Important: the “Back-up in case of alarm” function always prevails
over “Extended Back-up”, i.e. if one unit has to operate for a
specifi c week but a severe alarm appears, it will automatically
switch operation to the other unit.
Alarm levels are set to determine which of the two units should
operate (see Chapter 14. Alarms).
Note: In the case of installations with Back-up units, it is not
possible to share the probes, since both units must be fully
autonomous in their operation. If both units are connected to the
same supply duct network, it is imperative that the installation
consists of non-return dampers (installer responsibility).
For more detailed information refer to the manual of the "50FC"
control (No.10186).
For more detailed information refer to the manual of the "50FC"
control (No.10186).
1.10. Communication in a pLAN local network
This connection on a pLAN local network allows reducing the number
of Graphic terminals, since a single shared terminal can monitor all
units in the network.
The maximum number of units that can be confi gured on a Master/
Slave pLAN network is 15, and in case of Back-up units is 2.
The maximum number of units that can be connected on a pLAN
network is 15. As many Graphic terminals as units can be added to
the network. The terminal installed on the unit with address 1 will
be confi gured as shared and the rest as private.
Important: If the units are also to be included in a SHRD shared
network, the same addresses must be used on both networks
to avoid errors. Both, units and Graphic terminals, are shipped
confi gured from the factory.
Units confi gured as "Back-up" cannot be connected in a local
pLAN network, since the two units must be fully autonomous in
their operation.
Communication between the units of the pLAN network is carried
out using the fi eldbus1 of each control board.
“Master” unit, address 1 “Slave” unit, address 2 “Slave” unit, address 15
FieldBus1
Display port2
Ethernet
FieldBus2
/ BMS
Display port1
/ BMS
FieldBus1
Display port2
Ethernet
FieldBus2
/ BMS
Display port1
/ BMS
FieldBus1
Display port2
Ethernet
FieldBus2
/ BMS
Display port1
/ BMS
“50FC”
1
“50FC”
2
“50FC”
15
Characterisc of the network: communications standard: RS485;
transmission speed: 65,2 Kbit/s; maximum network length: 500 m.
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