Description of communication objects - Basic Documentation - RDF302 - RDF302.B

						Read
Object No.	Object		Address (Decimal)	Register Length	Read Only (RO) or Read/Write (R/W)	Functioncode(HEX) 0x03---Read Holding Registers 0x04---Read Input Registers 0x06---Write Single Register 0x10---Write Multiple Registers		MutiBytes Access Group	Special Process	Default	Data Type (Decimal)
1	System time		0600…0603	4	R/W	0x03	0x10			-	YYYY 1900...2155 = Year MM 1...12 = Month DD 1...31 = Day of Month d 0, 1…7 = Any,Mon…Sun hh 0...23 = Hours mm 0...59 = Minutes ss 0...59 = Seconds - - - Status bits
2	Room operating mode: State		1001	1	RO	0x04	-	1	-	Comfort	1=Comfort, 3=Economy, 4=Protection,
3	Fan output		1002	1	RO	0x04	-	1	-	0	0 = Fan off 33 = Low Fan 66 = Mid Fan 100 = High Fan
4	Room temperature		1003	1	RO	0x04	-	1	x50		0 ... 49 °C, 0xffff=Out of services
5	Room temperature: Current setpoint		1004	1	RO	0x04	-	1	x50		5 ... 40 °C, 4=OFF
6	Heating output		1005	1	RO	0x04	-	1	-	0	[0…100]
7	Cooling output		1006	1	RO	0x04	-	1	-	0	[0…100]
8	Electric heater output		1007	1	RO	0x04	-	1	-	0	[0…100]
9	Fault information		1100	10	RO	0x04	-	-	-		len <= 20
10	X1 (temperature) **		1008	1	RO	0x04	-	1	x50	-	0 ... 49 °C 0xffff = Out of services
11	X2 (temperature) **		1009	1	RO	0x04	-	1	x50	-	0 ... 49 °C 0xffff = Out of services
12	Fan operation (0=Auto / 1=Manual)		1010	1	RO	0x04	-	1	-	0	0 = Automatic 1 = Manual
13	X1 (digital) **		1011	1	RO	0x04	-	1	-	OFF	0 = OFF 1 = ON
14	X2 (digital) **		1012	1	RO	0x04	-	1	-	OFF	0 = OFF 1 = ON
15^*	Room operating mode: Preselection		0101	1	R/W	0x03	0x06	2	-	Comfort	1=Comfort, 3=Economy, 4=Protection,
16	Fan command value		0102	1	R/W	0x03	0x06	2	-	0	0 = Auto 33 = Low Fan 66 = Mid Fan 100 = High Fan
17	Room Temperature: Comfort setpoint		0103	1	R/W	0x03	0x06	2	x50		5 ... 40 °C
18	Outside temperature		0104	1	R/W	0x03	0x06	2	x50		0 ... 49 °C
19	Room operating mode: Window state		0105	1	R/W	0x03	0x06	2	-	Close	0 = Close (default) 1 = Open
20	Enable electric heater		0106	1	R/W	0x03	0x06	2	-	Enable	0 = Disable 1 = Enable
21	Heating/cooling changeover		0107	1	R/W	0x03	0x06	2	-	heating	0 = cooling, 1 = heating
22	Button lock command		0108	1	R/W	0x03	0x06	2	-	Unlock	4 = Lock all buttons 3 = Lock operating button only 2 = Lock fan button only 1 = Lock buttons (+ & -) only. 0 = Unlock
23	Application	Plant type	0109	1	R/W	0x03	0x06	2	-	NONE	0=NONE 1=2P 2=2P3P 3=2PEL 4=4P
24	Alarm descriptions	Fault text 1	0200…0209	10	R/W	0x03	0x10		-	Condensation in room	len <= 20
25		Fault text 2	0300…0309	10	R/W	0x03	0x10		-	Fault input 1	len <= 20
26		Fault text 3	0400…0409	10	R/W	0x03	0x10		-	Fault input 2	len <= 20
27		Fault text 4	0500…0509	10	R/W	0x03	0x10		-	Filter dirty	len <= 20
28	Parameter table	P01	0001	1	R/W	0x03	0x06	-	-	When 2-pipe 1:= Cooling only When 4-pipe 4:= Automatic	0:= Heating only 1:= Cooling only 2:= H/C changeover manual 3:= H/C changeover auto 4:= Heating and Cooling
29		P02	0002	1	R/W	0x03	0x06	-	-	1	Communication unit / time prog unit: 1:= Comf - Protection 2:= Comf - Eco - Prot
30		P04	0004	1	R/W	0x03	0x06	3	-	°C (0)	°C := Degrees Celsius °F := Degrees Fahrenheit
31		P05	0005	1	R/W	0x03	0x06	3	x50	0 K	– 3 ... 3 K
32		P06	0006	1	R/W	0x03	0x06	3	-	0	0:= Room Temperature 1:= Setpoint 2 = BUS temperature
33		P07	0007	1	R/W	0x03	0x06	3	-	0	0:= --- (No display) 1:= °C and °F 2:= Outside temperature [via bus] 3:= Time of day (12h) [via bus] 4:= Time of day (24h) [via bus]
34		P08	0008	1	R/W	0x03	0x06	3	x50	21 °C	5 ... 40 °C
35		P09	0009	1	R/W	0x03	0x06	3	x50	5 °C	5 ... 40 °C
36	Parameter table	P10	0010	1	R/W	0x03	0x06	3	x50	35 °C	5 ... 40 °C
37		P11	0011	1	R/W	0x03	0x06	3	x50	15 °C	OFF(=4.5), 5 ~WcoolEco; WcoolEco=40 °C max
38		P12	0012	1	R/W	0x03	0x06	3	x50	30 °C	WHeatEco ... 40 °C,OFF(=40.5); WHeatEco=5C min
39		P13	0013	1	R/W	0x03	0x06	3	-	ON	1=ON: Enabled 0=OFF: Disabled
40		P14	0014	1	R/W	0x03	0x06	3	-	0	0= Unlocked 1= Auto locked 2= Manual locked
41		P30	0030	1	R/W	0x03	0x06	4	x50	2 K	0.5 … 6 K
42		P31	0031	1	R/W	0x03	0x06	4	x50	1 K	0.5 … 6 K
43		P33	0033	1	R/W	0x03	0x06	4	x50	2 K	0.5 … 5 K
44		P34	0034	1	R/W	0x03	0x06	4	x50	2 K	0.5 … 5 K
45		P35	0035	1	R/W	0x03	0x06	4	-	5 min	0…10 min
46		P36	0036	1	R/W	0x03	0x06	4	x50	16 °C	10…25 °C
47		P37	0037	1	R/W	0x03	0x06	4	x50	28 °C	27…40 °C
48		P38/P40 **	0038	1	R/W	0x03	0x06	-	-	X1 = 3, X2 = 1	X1(1byte HIGH), X2(1byte LOW) 0:= --- (no function) 1:= Room temp ext / Return temp (AI) 2:= H/C changeover (AI/DI) 3:= Operating mode contact [DI) 4:= Dew point sen. (DI) 5:= Enable electro heater (DI) 6:= Fault input (DI) 7:= Monitor input [Digital] 8:= Monitor input [Temp]
49		P39	0040	1	R/W	0x03	0x06	4	-	0 (N.O.)	0:= Normally open / Open 1:= Normally closed / Close
50		P41	0041	1	R/W	0x03	0x06	4	-	0 (N.O.)	0:= Normally open / Open 1:= Normally closed / Close
51		P44	0044	1	R/W	0x03	0x06	-	-	150 s	20…300 sec
52		P46	0182	1	R/W	0x03	0x06	-	x10	0	0.0~5.0
53		P48	0048	1	R/W	0x03	0x06	6	-	1 min.	1...20 minutes
54		P49	0049	1	R/W	0x03	0x06	6	-	1 min.	1...20 minutes
55		P50	0050	1	R/W	0x03	0x06	6	-	OFF	0 = OFF: Not active 1…5 min: Active with selected duration
56		P51	0051	1	R/W	0x03	0x06	6	x50	OFF	9=OFF, 10..50 °C
57		P52	0052	1	R/W	0x03	0x06	6	-	1	0:= Disabled 1:= Enabled 2:= Heating only 3:= Cooling only
58		P53	0053	1	R/W	0x03	0x06	6	-	3-speed	1:= 1-speed 2:= 3-speed
59		P54	0054	1	R/W	0x03	0x06	6	-	60 sec	0 ... 360 sec
60		P55	0055	1	R/W	0x03	0x06	6	-	100%	80..100%
61		P56	0056	1	R/W	0x03	0x06	6	-	65%	30..75%
62	Parameter table	P57	0057	1	R/W	0x03	0x06	6	-	10%	1..15%
63		P58	0058	1	R/W	0x03	0x06	6	-	ON	1 = ON: enabled 0 = OFF: disabled
64		P59	0059	1	R/W	0x03	0x06	6	-	2 min	1 ... 6 min
65		P60	0060	1	R/W	0x03	0x06	6	-	0	0…89min, OFF(90)
66		P61	0061	1	R/W	0x03	0x06	6	-	OFF	0…359min, OFF(360)
67		P62	0062	1	R/W	0x03	0x06	6	-	Off (0)	0 = Off, 100 … 9900 hours
68		P65	0065	1	R/W	0x03	0x06	-	x50	8 °C	OFF(=4.5), 5 ~WcoolEco; WcoolEco=40 °C max
69		P66	0066	1	R/W	0x03	0x06	-	x50	OFF	WHeatEco ... 40 °C,OFF(=40.5); WHeatEco=5C min
70		P68	0068	1	R/W	0x03	0x06	8	-	2 = 19200bps	0 = 4800bps, 1 = 9600bps, 2 = 19200bps, 3 = 38400bps
71		P69	0069	1	R/W	0x03	0x06	8	-	OFF	0 = OFF := Disabled 1 = ON := Enable
72		P70	0070	1	R/W	0x03	0x06	8	-	Even	0 = Odd 1 = Even 2 = No parity
73		P71	0071	1	R/W	0x03	0x06	8	-	OFF	0 = OFF := Disable 1 = ON := Reload start
74		P81	0081	1	R/W	0x03	0x06		-	1	1…247

* If a bus command is received via MODBUS for either COMFORT or ECONOMY operating mode, the symbol

of the selected operating mode will be displayed.
i.e. either COMFORT or ECONOMY symbol only

If a bus command is received for PROTECTION mode, the AUTO TIMER symbol () will be displayed and

all key buttons will be de-activated.

i.e. both PROTECTION and AUTO TIMER symbols

** RDF302.B does not have inputs X1 and X2. Parameters related x1 and X2 input functions are not applicable
to RDF302.B.

System clock format

Graphical user interface, text, application, Word Description automatically generated

Datapoint Type

ID:	Name:		Encoding:	Range:	Unit:	Usage:
19.001	DPT_DateTime	Y	Binary, offset 1900 0 = 1900 255 = 2155	[0…255]	Year	General
		M	Binary 1 = January 12 = December	[1…12]	Month
		D	Binary 1 = 1st day 31 = 31st day	[1…31]	Day of month
		ddd	1 = Monday … 7 = Sunday 0 = any day	[0…7]	Day of week
		hhhhh	Binary	[0…24]	Hour of day
		mmmmmm	Binary	[0…59]	Minutes
		ssssss	Binary	[0…59]	Seconds
		F	0 : Normal (No fault) 1 : Fault	{0,1}	Fault
		WD	0 : Bank day (No working day) 1 : Working day	{0,1}	Working Day
		NWD	0 : WD field valid 1 : WD field not valid	{0,1}	No WD
		NY	0 : Year field valid 1 : Year field not valid	{0,1}	No Year
		ND	0 : Month and Day of Month fields valid 1 : Month and Day of Month fields not valid	{0,1}	No Date
		NDoW	0 : Day of week field valid 1 : Day of week field not valid	{0,1}	No Day of Week
		NT	0 : Hour of day, Minutes and Seconds fields valid 1 : Hour of day, Minutes and Seconds fields not valid	{0,1}	No Time
		SUTI	0 : Time = UT+X 1 : Time = UT+X+1	{0,1}	Standard Summer Time
		CLQ	0 : clock without ext. sync signal 1 : clock with ext. sync signal	{0,1}	Quality of Clock

Description of communication objects - Basic Documentation - RDF302 - RDF302.B - RDF302/VB

Semi-flush mount room thermostats with RS485 Modbus communications RDF302, RDF302.B, RDF302/VB