sauter Equitherm EQJW 125, Руководство пользователя

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EQJW 125: Heating controller
Communication functions
7001029003 A
© Fr. Sauter Ltd.
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6.2.2 EDB 100 room operating unit
The EDB 100 room operating unit allows the occupant, from the comfort of
his living room, to alter the target temperature, call up various data and
change the operating mode. To connect the EDB 100 room operating unit
with the EQJW 125, the two device-bus terminals on the room operating unit
should be connected with terminals Data1 and Data2 on the controller
(polarity is irrelevant). The room operating unit requires its own power supply.
On the EQJW 125, parameter CP15 should be set to '1' in order to use the
room operating unit. The address of the room operating unit is set via
parameter CP16.
6.2.3 Sending and receiving outdoor temperatures
Controllers which have an outdoor temperature sensor can be configured so
that they make the measured outdoor temperature value available to other
controllers via the device bus. This allows weather-compensating control
even in installations with no outdoor temperature sensors of their own.
To send an outdoor temperature, set parameter CP10 to '1' and to receive
one, set parameter CP11 to '1'.
6.2.4 Requesting and processing a heat requirement
One or more controllers can be connected downstream in a controller
grouping. You can use parameter CP12 to send the required flow
temperatures for the various downstream control circuits to the controller for
the primary circuit. If CP13 is set to '1' on the controller for the primary circuit,
these data will be received. The controller will then control the highest flow
temperature sent to it in the primary circuit.
6.2.5 Synchronising the time
If several controllers are interconnected, their times should be synchronised.
For this purpose, CP09 is set to '1' on one of the controllers. Then, this
controller sends its system time to the device bus once every 24 hours. This
time is adopted by the other controllers. Regardless of the setting of
communication parameter CP09, if the time is adjusted on one of the
interconnected controllers, it will be adopted by the others.
6.3 Modbus communication
The EQJW 125 can respond to enquiries in the Modbus RTU protocol as a
slave. For this purpose, an RS-485 two-wire bus is connected to terminals 18
and 19. A suitable Modbus master (BMS centre) can send enquiries or
commands via this bus.