Network Connection; Setup; Control Logic; Management Of Secondary Units From The Terminal (Main) - Carel humiSonic User Manual

15.1 Setup

The Main unit is able to control the operation of a maximum of 3 Secondary
units connected via tLAN network . For the electrical connections, see the
diagram on the following page. Dipswitches 1-3 on the Main unit must
be all set to OFF. Each Secondary unit must be correctly configured via
the following dipswitches:
1: Set ON for serial port (M11) conversion from 485 to tLAN;
2/3: Secondary unit address, as shown in the following figure.

15.2 Control logic

The Main unit controls each Secondary unit connected to it using the
following parameters:
• enable/disable operation;
• atomised water production capacity.
The control signals (probes/humidistat/external controller) are read and
managed only by the Main unit, which then controls the operation of the
Secondary units. Production capacity of the Main unit is sent to all of the
Secondary units:
E.g. 1: Main configured with proportional control (see chapter "Electrical
connections") and 90% request: the Main unit and each Secondary
unit will modulate operation at 90% capacity (see chapter "Operating
principles").
E.g. 2: Main configured with room probe control, set point 50% rH: when
the set point is reached, the Main unit and all of the Secondary units will
stop atomised water production.
Each unit (Main or Secondary) is independent as regards the control logic
for atomised water production and all other functions.
15.3 Management of Secondary units from
the terminal (Main)
From the main screen, press PRG for 3 seconds and enter the password:
90. The terminal will display the status of the connected Secondary units
according to the following logic - starting from the left digit:
Unit 1 Status, Unit 2 Status, Unit 3 Status.
Fig. 1
Fig. 4
Fig. 7
The symbol 1 means "unit online", while the symbol  means "unit offline".
Fig. 1 shows the example of Unit 1 online (left digit 1), while Units 2 and 3
are offline (middle and right digit  ).
Press ENTER to access the menu for selecting the unit to be controlled,
and UP and DOWN to scroll through the list of units. Fig. 2 shows the
screen to select Unit 1.
Press ENTER to access the control menu for the desired unit, and UP and
DOWN to scroll through the following screens:
• Request sent by the Main unit as a percentage (Fig. 3) .

15. NETWORK CONNECTION

Fig. 2 Fig. 3
Fig. 5 Fig. 6
Production
Fill
Water presence
Fig. 8
Drain
Fig. 9
• Operating hour counter (Fig. 4) , which can be reset by pressing
UP+DOWN for 5 seconds (see parameter d3).
• Unit alarms ( Fig. 5 , if there are no alarms -- is displayed), can be reset by
pressing UP + DOWN for 5 seconds.
• humidifier status (Enb = enabled): pressing ENTER disables the
humidifier and dIS is shown on the main screen; to enable the unit
press ENTER again;
• limit probe set point and proportional band (SL, bL), if enabled by
setting bH=1, parameter bH available in the list of parameters Par
• Accessing the parameter configuration menu (Fig. 6) .
In this view, the icons show the status of the selected Secondary unit
(Fig. 9)
Press ENTER on the configuration parameters menu screen to access the
list of modifiable parameters (Fig. 7) .
For the meaning of the parameters, see chap. "Configuration parameters".
Parameter b8 is used as a timeout for the recognition of an offline unit;
depending on the number of connected Secondary units, it may be
necessary to change this parameter, set by default to 10 s.

15.4 Alarms

From the main screen, the Main units displays any alarms on a specific
Secondary unit, with the code ESX. X refers to the address of the
Secondary unit with the active alarm (Fig. 8, Secondary Alarm 1).
For details of the current alarm, access the corresponding Secondary
unit menu. Each unit manages its own alarms independently, with the
exception of those referring to the control signals connected to the Main
unit that disable the entire network of humidifiers
Alarm Description
PU External control signal not connected
OFL Supervisor disconnected and Mainin request from serial mode
15.5 Control via supervisor (Carel/Modbus®)
Supervisor variables I62 and I63 (Modbus® 189 and 190) can be used
to view and set the parameters for the Secondary units. Variable I62
(Modbus 189), used to read/write a given parameter, must be written as
shown in the following table; the value of the parameter is displayed/set
using variable I63 (Modbus 190).
For a read request, the value of the variable will be available at I63 (Modbus
190), and after writing at I62; while for a write request, the written value
will be available at I63.
Bit 15 Mode Bit 13-14
Secondary unit
address
0=Read 01 = Secondary 1
1=Write 10 = Secondary 2
11 = Secondary 3
E.g.: Write parameter P0 on Secondary 2 to 70
• Write I63 to 70
• Write I62 to 50224
Write Secondary Integer
2 variable
1 10 00100
33 Direct version for room applic. +0300062EE - rel. 1.4 - 24.09.2020
Bit 8-12 Bit 0-7
Variable type CAREL supervisor address
00100=Int.
01000=Analogue E.g.: 0000 1000=8
10000=Dig
P0=
address 48
00110000 =1100010000110000=50224
ENG
Tab. 15.a
Tab. 15.b