Instructions

Intesis

INMBSDAI001R000

User’s Manual r3.8 EN

This information is subject to change without notice

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4.2.3 Considerations on Temperature Registers

• AC unit temperature setpoint (R/W)

(register 4 – in Protocol address / register 5 – in PLC address):

This is the adjustable temperature setpoint value that must be required by the user. This

remote controller connected to the Daikin indoor unit will report the same temperature

setpoint value as this register, unless virtual temperature is applied.

• AC unit temperature reference (R)

(register 5 – in Protocol address / register 6 – in PLC address):

This register reports the temperature that is currently used by the Daikin indoor unit as

the reference of its own control loop. Depending on the configuration of the indoor unit,

this value can be the temperature reported by the sensor on the return path of the Daikin

indoor unit or the sensor of its remote controller. It is a read-only register (Modbus

functions 3 or 4).

• AC unit external temperature reference (Modbus) (R/W)

(register 22 – in Protocol address / register 23 – in PLC address):

This register allows us to provide an external temperature’s sensor from the Modbus side.

If an external temperature is provided through this register, indoor unit will use it as

reference for its temperature control loop.

o For this temperature to take effect it is required that:

a) The Daikin AC indoor unit is configured in such a way that it uses the

“thermostat sensor in the remote controller” (this is, INMBSDAI001R000

will act as thermostat sensor providing a temperature sensor reading). This

configuration is done via a Daikin remote controller connected to the indoor

unit (Config mode “10” – first code value “2” – second code value “1”) and

must be done by Daikin authorized installers at the time of the installation

of the AC.

Moreover, the DIP Switch SW1-P4 needs to be set as “Daikin Remote

Controller ambient temperature reading“ (On position).

b) INMBSDAI001R000 is set as “master” of P1P2 bus, with respect to an

additional remote controller in the bus (see section “2.1 Connection to the

AC indoor unit” and “4.3 DIP-Switch Configuration Interface”)

o Register value after INMBSDAI001R000 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.

In case the INMBSDAI001R000 is set as Master, DIP-Switch SW1-P4 is set as “Daikin

Indoor Unit ambient temperature reading (Default value)” (Off position) and consequently

the Daikin AC indoor unit is set to use its own return path temperature, any value written

in this register will not take effect.

In case the INMBSDAI001R000 is set as Slave and there is a write request from the

Modbus master to register 22/23, “Virtual temperature” will apply: