Read

Write

Object no.

Reg. type

Object

Address (Decimal)

Register length

Read Only (RO) or Read/Write (R/W)

Function code (HEX)
0x03---Read holding registers

0x04---Read input registers

0x06---Write single register

0x10---Write multiple registers

Special Process

Default value

Data value range (Decimal)

1

U16-B

Software version

1

1

RO

0x04

-

-

-

000…999

e.g. 102 = V1.0.2 (0…999)

2

U16-B

Hardware version

2

1

RO

0x04

-

-

-

000…999

e.g. 102 = V1.0.2 (0…999)

3

U16-B

Present application

3

1

RO

0x04

-

-

-

1 = No application

2 = 2-pipe, 2-wire on/off valve

3 = 2-pipe, modulating valve

4 = 2-pipe, 3-wire on/off valve

5 = 2-pipe, 3-position valve

6 = 2-pipe el. heat 2-wire on/off vlv

7 = 4-pipe, 2-wire on/off valve

8 = 4-pipe, modulating valve

4

U16-B

Present operating mode

4

1

RO

0x04

-

-

4

1 = Protection

2 = Economy

3 = Not used

4 = Comfort

5

S16-B

Room temperature

5

1

RO

0x04

-

x50

21

-20…70 °C

-100 = Out of service

6

S16-B

Room temperature setpoint

6

1

RO

0x04

-

x50

21

5...40 ℃

0 = OFF

7

U16-B

Heating request

7

1

RO

0x04

-

-

0

0...100 %

8

U16-B

Cooling request

8

1

RO

0x04

-

-

0

0...100 %

9

U16-B

Fan operating state

9

1

RO

0x04

-

-

1

1 = Automatic

2 = Manual

10

U16-B

Three-speed fan

10

1

RO

0x04

-

-

1

1 = OFF

2 = Low fan

3 = Medium fan

4 = High fan

11

U16-B

Variable speed fan

11

0

0...100 %

12

U16-B

Operating hours fan

12

1

RO

0x04

-

-

0

0 = no counting

1...1999 (resolution 1 hour)

13

U16-B

Input D1

13

1

RO

0x04

-

-

-

0 = OFF

1 = ON

14

U16-B

Fault

14

1

RO

0x04

-

-

1

1 = No fault

2 = Built-in sensor

3 = Not used

4 = Input D1

5 = Not used

6 = Not used

7 = Communication

15

U16-B

P01 1)

RDF400MB, RDF460MB

18

1

R/W

0x03

0x06

-

1

1 = 2-pipe, H/C changeover

2 = 2-pipe, electrical heating coil

3 = 4-pipe

P01 1)

RDF440MB

1 = 2-pipe, H/C changeover

3 = 4-pipe

16

U16-B

P02 1)

P01 = 1 or 2

19

1

R/W

0x03

0x06

-

2

1 = Heating only

2 = Cooling only

3 = H/C changeover auto

4 = H/C changeover manual

P02 1)

P01 = 3

5

4 = H/C changeover manual

5 = Heating and cooling

17

U16-B

P03 1)

RDF400MB

20

1

R/W

0x03

0x06

-

2

1 = 1-speed fan

2 = 3-speed fan

P03 1)

RDF440MB

2

1 = 1-speed fan

2 = 3-speed fan

3 = ECM fan

P03 1)

RDF460MB

3

3 = ECM fan

18

U16-B

P04 1)

RDF400MB, RDF460MB

21

1

R/W

0x03

0x06

-

1

1 = 2-wire on/off valve actuator

2 = 3-wire on/off valve actuator

3 = 3-position valve actuator

P04 1)

RDF440MB

4

4 = Modulating valve actuator

19

U16-B

P10 (P02 ≠ 4)

22

1

R/W

0x03

0x06

-

1

1 = Comfort, Protection

2 = Comfort, Economy, Protection

P10 (P02 = 4)

1 = Comfort, Protection

20

U16-B

P11

23

1

R/W

0x03

0x06

-

1

1 = Room temperature, built-in

2 = Temperature setpoint

3 = Temperature via bus

21

U16-B

P12

24

1

R/W

0x03

0x06

-

1

1 = Celsius

2 = Fahrenheit

22

S16-B

P13

25

1

R/W

0x03

0x06

x50

0

-5…5 K

23

U16-B

P14

26

1

R/W

0x03

0x06

-

1

1 = Off

2 = Temperature in deg C and deg F

3 = Temperature setpoint

4 = Time of day am/pm

24

U16-B

P15

27

1

R/W

0x03

0x06

-

1

1 = Unlock

2 = Lock

3 = Lock, except setpoint

4 = Lock setpoint

5 = Lock fan

6 = Lock operating mode

25

S16-B

P20

28

1

R/W

0x03

0x06

x50

5 ℃

5 °C…(P21-1)

26

S16-B

P21

29

1

R/W

0x03

0x06

x50

35 ℃

(P20+1)...40 ℃

27

S16-B

P22

30

1

R/W

0x03

0x06

x50

15 ℃

0 = OFF

5 ℃…P23 (WCoolEco)

28

S16-B

P23

31

1

R/W

0x03

0x06

x50

30 ℃

0 = OFF

P22 (WHeatEco)…40 ℃

29

U16-B

P30

32

1

R/W

0x03

0x06

-

1

1 = Disable

2 = Low speed, heating and cooling

3 = Low speed, cooling only

30

U16-B

P40

33

1

R/W

0x03

0x06

-

1

0 = Disable

1 = Enable

31

S16-B

P41

34

1

R/W

0x03

0x06

x50

2 K

0.5…5 K

32

S16-B

P42

35

1

R/W

0x03

0x06

x50

2 K

0.5…5 K

33

S16-B

P43

36

1

R/W

0x03

0x06

x50

2 K

0.5…6 K

34

S16-B

P44

37

1

R/W

0x03

0x06

x50

1 K

0.5…6 K

35

U16-B

P45

38

1

R/W

0x03

0x06

-

45 min

0…120 min

36

U16-B

P46

39

1

R/W

0x03

0x06

-

150 s

20…300 s

37

S16-B

P50

40

1

R/W

0x03

0x06

x50

8 ℃

0 = OFF

5...P51 (WCoolProt) (40 ℃, when P51 = OFF)

38

S16-B

P51

41

1

R/W

0x03

0x06

x50

0

0 = OFF

P50 (5 ℃, when P50 = OFF)...40 ℃

39

U16-B

P62

42

1

R/W

0x03

0x06

-

1

1 = No input

2 = Not used

3 = H/C changeover

4 = Window contact

5 = Fault input

6 = Monitor input

7 = Not used

8 = Presence detector

9 = Hotel presence detector

40

U16-B

P63

43

1

R/W

0x03

0x06

-

1

1 = Normally open

2 = Normally closed

41

U16-B

P70

44

1

R/W

0x03

0x06

-

0

0 = Off or 1…359 minutes

360 = Fan continues to run

42

U16-B

P71

45

1

R/W

0x03

0x06

-

1

0 = Disable

1 = Enable

43

U16-B

P72

46

1

R/W

0x03

0x06

-

80 %

ECM fan med.…100 %

44

U16-B

P73

47

1

R/W

0x03

0x06

-

50 %

ECM fan min.... ECM fan max.

45

U16-B

P74

48

1

R/W

0x03

0x06

-

30 %

1 %... ECM fan med.

46

U16-B

P75

49

1

R/W

0x03

0x06

-

2

1 = Enable

2 = Disable

3 = Reset

47

U16-B

P80

50

1

R/W

0x03

0x06

-

1

1 = Previous operating mode

2 = Comfort mode

3 = Protection mode

48

U16-B

P82

51

1

R/W

0x03

0x06

-

0

0 = Disable

1 = Enable

49

U16-B

P83

52

1

R/W

0x03

0x06

-

0

00…99

50

U16-B

P89

53

1

R/W

0x03

0x06

-

0

0 = Disable

1 = Enable

51

U16-B

Room operating mode switch

101

1

R/W

0x03

0x06

-

5

1 = Protection

2 = Economy

4 = Comfort

5 = Not used

52

U16-B

Forced operating mode for Protection

102

1

R/W

0x03

0x06

-

0

0 = Disable

1 = Enable

53

U16-B

Fan speed command

103

1

R/W

0x03

0x06

-

1

1 = Auto

2 = Low speed

3 = Medium speed

4 = High speed

54

S16-B

Setpoint for Comfort

104

1

R/W

0x03

0x06

x50

21

5...40 °C

55

S16-B

Room temperature via bus

105

1

R/W

0x03

0x06

x50

-

- 20...70 °C

56

U16-B

Window contact

106

1

R/W

0x03

0x06

-

1

0 = Open

1 = Closed

57

U16-B

Presence detector

107

1

R/W

0x03

0x06

-

0

0 = Absent

1 = Present

58

U16-B

Keycard

108

1

R/W

0x03

0x06

-

1

0 = No

1 = Yes

59

U16-B

Changeover mode

109

1

R/W

0x03

0x06

-

1

0 = Heating

1 = Cooling

60

U16-B

System time

200

...

203

4

R/W

0x03

0x10

-

-

Hhmm

0000YYYY YYYYYYYY

0000MMMM 000DDDDD

dddhhhhh 00mmmmmm

00ssssss xxxxxxxx Y

2000...2100 = Year

M 1...12 = Month

D 1...31 = Day of month

d 0, 1…7 = Any, Mon…Sun

h 0...23 = Hours

m 0...59 = Minutes

s 0...59 = Seconds

x reserve

61

U16-B

Restart device

204

1

R/W

0x03

0x06

-

0

0 = OFF

1 = Restart

62

U16-B

Test mode Y1/Y2 output

205

1

R/W

0x03

0x06

-

1

1 = Released

2 = Y1, Y2 on for 10 min

3 = Y1, Y2 off for 10 min

4 = Y1 off, Y2 on for 10 min

5 = Y1 on, Y2 off for 10 min

63

U16-B

Reserve 1

206

1

-

0x03

0x10

-

-

-

64

U16-B

Reserve 2

207

1

-

0x03

0x10

-

-

-

65

U16-B

Reserve 3

208

1

-

0x03

0x10

-

-

-

66

U16-B

Reserve 4

209

1

-

0x03

0x10

-

-

-

67

U16-B

Reserve 5

210

1

-

0x03

0x10

-

-

-

100

U16-B

Start/update configuration

300

1

R/W

0x03

0x06

-

0

0 = Update

1 = Start

Note: 1) Before changing parameters P01...P04 value, update "Start/update configuration" to 1. Device restarts automatically after exiting the parameter setting mode if:

  • "Start/update configuration" is back to 0.
  • Parameter "Start/update configuration" value remains 1 for more than 10 minutes.