Intesis IntesisBox FJ-AC-MBS-1 User Manual page 11

ModBus RTU – Fujitsu
®
IntesisBox
o
This configuration is done via a Fujitsu remote controller connected to the indoor unit (Function
number "42" – setting value "1" / operation of Thermosensor button) and must be done by Fujitsu
authorized installers at the time of the installation of the AC.
o
Register value after FJ-AC-MBS-1 startup is -32768, which means that no temperature reference is
provided to the AC indoor unit. In that case, AC indoor unit will use its own return path temperature
sensor as reference for its control loop.
o
Virtual temperature mechanism will be activated once the first temperature value is received on
register 23 – in PLC addressing:
Where:
S - setpoint value currently applied to the indoor unit
AC
S - setpoint value
u
T - external temperature reference written at BACnet side
u
When FJ-AC-MBS-1 detects a change in any of the values of {S
(S ) to the indoor unit.
AC
Moreover, notice that temperature's values of all these four registers are expressed according to the temperature´s
format configured through its onboard DIP-Switches (See
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•
Celsius value: Value in Modbus register is the temperature value in Celsius (i.e. a value "22" in the
Modbus register must be interpreted as 22ºC).
•
Tenths of value: Value in Modbus register is the temperature value in decicelsius (i.e. a value "220"
in the Modbus register must be interpreted as 22.0ºC).
•
Fahrenheit value: Value in Modbus register is the temperature value in Fahrenheit (i.e. a value "72"
in the Modbus register must be interpreted as 72ºF (~22ºC).
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This information is subject to change without notice
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IntesisBox is a registered trademark of Intesis Software SLU
– (T
S = S
AC u
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). These following formats are possible:
.
– S
)
u U
, T }, it will send the new setpoint
u u
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O SE ENCUENTRA EL ORIGEN DE LA REFERENCIA
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11/21
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