Basic Documentation

Functions
Communication objects
4
A6V12114068_en--_c
49 | 66
Read
Write
Object no.
Object
Related parameter
Address (Decimal)
Register length (bytes)
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)
20
Modbus data frame format
P83
0003
1
R/W
0x03
0x06
-
0
0 = 1/8/E/1
1 = 1/8/O/1
2 = 1/8/N/1
3 = 1/8/N/2
21
Control sequence
if 2-pipe applications are
selected
P01
0004
1
R/W
0x03
0x06
-
1
0 = Heating only
1 = Cooling only
2 = H/C changeover manual
3 = H/C changeover auto
Control sequence
if 4-pipe application is
selected
4
2 = H/C changeover manual
4 = Heating and cooling
22
Mode selection via room
operating mode button
P02
0005
1
R/W
0x03
0x06
-
3
3 = Comfort – Protection
4 = Comfort – Economy –
Protection
23
Unit
P04
0006
1
R/W
0x03
0x06
-
0
0 = °C (Celsius)
1 = °F (Fahrenheit)
24
Measure value correction (for
built-in/external sensor)
P05
0007
1
R/W
0x03
0x06
x50
0
– 5...5 K
25
Standard display
P06
0008
1
R/W
0x03
0x06
-
0
0 = Room temperature
1 = Setpoint
2 = Temperature value via bus
26
Additional display information
P07
0009
1
R/W
0x03
0x06
-
0
0 = No display
1 = Room temp °C or °F
2 = Outdoor temperature via bus
3 = Time of day (12-hour) via bus
4 = Time of day (24-hour) via bus
27
Comfort basic setpoint
P08
0010
1
R/W
0x03
0x06
x50
21 ℃
5...40 °C
28
Minimum Comfort setpoint
P09
0011
1
R/W
0x03
0x06
x50
5 ℃
5...40 °C
29
Maximum Comfort setpoint
P10
0012
1
R/W
0x03
0x06
x50
35 ℃
5...40 °C
30
Economy heating setpoint
P11
0013
1
R/W
0x03
0x06
x50
5 ℃
Off
5...WCoolEco (P12)
WCoolEco (P12) = 40 °C max.
31
Economy cooling setpoint
P12
0014
1
R/W
0x03
0x06
x50
30 ℃
Off
WHeatEco (P11)...40 °C
WHeatEco (P11) = 5 °C min.
32
1)
Electric heater when cooling
(RDF660MB only)
P13
0015
1
R/W
0x02
0x06
-
1
0 = Disabled
1 = Enabled
33
Key lock
P14
0016
1
R/W
0x03
0x06
-
0
0 = Unlock
1 = Lock (all lock)
2 = Setpoint adjustable
3 = Setpoint lock
4 = Fan lock
5 = Operating mode lock
34
Fans stage in dead zone
(Comfort)
P15
0017
1
R/W
0x03
0x06
-
0
0 = Disabled
1 = Low speed (heating and
cooling)
2 = Low speed (cooling only)
35
Operating mode after power
failure
P27
0018
1
R/W
0x03
0x06
-
0
0 = Previous operating mode
1 = Off mode (Protection)
2 = On mode (Comfort)
36
Heat P-band Xp/switching
differential
P30
0019
1
R/W
0x03
0x06
x50
2 K
0.5…6 K
37
Cool P-band Xp/switching
differential
P31
0020
1
R/W
0x03
0x06
x50
1 K
0.5…6 K
38
Integral time (fan)
P32
0021
1
R/W
0x03
0x06
-
0 min
0 …20 min
39
Dead zone Comfort mode
P33
0022
1
R/W
0x03
0x06
x50
2 K
0.5…5 K
40
Setpoint differential
P34
0023
1
R/W
0x03
0x06
x50
2 K
0.5…5 K