1.
2.
USER
1.
2.
GENERAL
1.
2.
SPECIALIS
T PERSONNEL
EN
EN
KWL
®
Hygrobox KWL HBX EH/WW
Operating and installation instructions
36
13.3.1MODBUS CONNECTION
CAUTION: Modbus settings can only be changed with the service password!
Mode:
RTU
Default
Baud rate
1200, 4800, 9600, 19200, 38400, 57600, 115200
19200
Start bit
1
1
Data bits
8
8
Stop bit
1 stop bit for even or odd /
2 stop bits for “None”
1
Parity
None, even, odd
Even
Address
Modbus address (1-247)
31
Modbus target values
Modbus write/read holding register (4x)
Name
Description
Address Min
Max
Decimal-
points
Data
type
Target temperature
Target value air outlet temperature (°C)
0
15
25
0
signed
Target humidity
Target value relative humidity (% RH)
2
40
60
0
signed
Enable via Modbus
Enable (0=inhibited; 1=enabled )
6
0
1
0
bit
Modbus data points
Read input register (3x)
Name
Description
Address
Decimal points
Data type
T_supply air
Current air outlet temperature (°C)
0
1
unsigned
rF_supply air
Current relative humidity (%)
2
1
signed
aF_supply air
Current absolute humidity (g/m³)
4
1
unsigned
Dew point_supply air
Dew point(°C)
6
1
signed
Float switch
Float switch (0=Inactive; 1=active)
4
0
bit
Air flow measurement
Volume flow detection (<1800 volume flow detected)
10
0
signed
Water valve
Water valve (0=off; 1=on)
9
0
bit
UVC_ballast
UVC ballast (0=off; 1=on)
10
0
bit
Drain pump
Drain pump (0=off; 1=on)
11
0
bit
Motor_rotor
Motor rotor (0=off; 1=on)
12
0
bit
Heating_ON
Electric heater battery level 1 (0=off; 1=on)
38
0
unsigned
Level2_heater battery
Only for KWL HBX 500 EH*: Electric heater battery level 2
(0=off; 1=on)
20
0
bit
Heating circuit pump
Only for KWL HBX***WW*: Heating circuit pump (0=off;
1=on)
24
0
bit
0_10V_mixer_heating circuit
Only for KWL HBX***WW*: Control signal mixer for hot wa-
ter heater battery (0 - 10 V)
50
1
unsigned
UVC_lamp_DEFECTIVE
Error UVC tube (0=no; 1=yes)
29
0
bit
UVC_lifetime_end
UVC tube maximum operating hours (0=no; 1=yes)
30
0
bit
Drain pump_DEFECTIVE
Error: Drain pump (0=no; 1=yes)
31
0
bit
Humidity_too_high
Error: Relative air humidity too high for more than 4 hours
(0=no; 1=yes)
32
0
bit
Humidity_too_low
Error: Relative air humidity too low for more than 6 hours
(0=no; 1=yes)
33
0
bit
Change_osmosis filter
Osmosis filter maximum operating hours (0=no; 1=yes)
34
0
bit
Operating status
Operating status (0=off; 1=on; 2=standby)
12
0
unsigned
Accumulative fault message
Accumulative fault message (0=no; 1=yes)
35
0
bit
Bus error
Bus error (0=no; 1=yes)
36
0
bit
Operating hours_water filter
Operating hours water filter (0 - 10000 h)
78
0
unsigned
Operating hours_UVC tube
Operating hours UVC tube (0 - 10000 h)
80
0
unsigned
Operating hours_water filter
Operating hours osmosis filter (0 - 10000 h)
82
0
unsigned
Operating hours_active_humidity control
Operating hours active_humidity control (0 - 10000 days)
84
0
unsigned
