Instructions

Intesis
®
Modbus RTU – Fujitsu User Manual r1.3 EN
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This information is subject to change without notice
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Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
▪ 0x8000: No temperature’s value is being provided from
an external sensor. No virtual temperature is being
applied.
▪ Any other: (ºC/x10ºC/ºF)
66
67
R
Return path temperature
1,2,3
▪ -32768 (Initialization value)
▪ Ranges are specific from Manufacturer
97
98
R/W
Block Periodic Sendings
5,7
▪ 0: Non-blocked (Default value)
▪ 1: Blocked
98
99
R
Master/Slave (gateway’s role)
▪ 0: Slave
▪ 1: Master
4.2.2 Configuration Registers
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
13
14
R/W
“Open Window” switch-off timeout
8
▪ 0..30 (minutes)
▪ Factory setting: 30 (minutes)
14
15
R
Modbus RTU baud-rate
▪ 2400bps
▪ 4800bps
▪ 9600bps (Default)
▪ 19200bps
▪ 38400bps
▪ 57600bps
▪ 76800bps
▪ 115200bps
15
16
R
Modbus Slave Address
▪ 1..63
49
50
R
Device ID: 0x0D00
50
51
R
Software version
99
100
W
Reset
▪ 1: Reset
4.2.3 Considerations on Temperature Registers
• AC unit Temperature Setpoint (R/W) (register 5 – in PLC addressing): This is the adjustable temperature
setpoint meant to be required by the user. This register can be read (Modbus function 3 or 4) or written
(modbus functions 5 or 16). A remote controller connected to the 3-wire bus of the Fujitsu indoor unit will
report the same temperature setpoint value as this register.
• AC unit external reference temperature (R/W) (register 23 – in PLC addressing): This register allows
providing an external temperature reference from Modbus side. If an external temperature is provided
through this register, indoor unit will use it as reference for its temperature control loop.
o This register will have no effect in those Fujitsu RAC / domestic line splits Air-Conditioning units –
this is, those models requiring an additional communication accessory enabling communication with
INMBSFGL001I000.
o For this temperature to take effect it is required that the Fujitsu AC indoor unit is configured in such
a way that it uses the “thermostat sensor in the remote controller” (this is, INMBSFGL001I000 will
act as thermostat sensor providing a temperature sensor reading).
7
If the register is configured as “0:Non-blocked”, all commands received from Modbus will be sent to the AC system. If “1: Blocked”, commands from Modbus will only
be sent to the AC system if they differ from the previous value.
8
Once window contact is open, a count-down to switch off the AC Unit will start from this configured value.