Notes On Settings Via Serial Connection; Alarms - Carel MasterAria User Manual

ENG
1
P127

4.3 Notes on settings via serial connection

All the MasterAria parameters can be viewed and those without write
protection modifi ed via serial connection (PlantVisor and Modbus®).
Below is a short description of the most signifi cant variables (for the
settings, see the summary table of parameters).
Variable Meaning
Control probe This variable contains the value of the probe used to control the MasterAria (B1 or BT).
The value considers any off sets, hysteresis, control algorithms etc.
Set point setting This variable is used to read and where necessary overwrite the value of the set point
confi gured on the panel. This is especially useful if the MasterAria has the comfort
function active (e.g. centralised systems such as hotels, offi ces etc.).
Control set point This variable is used to read the value of the control set point used by MasterAria.
The value considers the hysteresis, compensation factors, off sets (e.g.: sleep function),
algorithms etc.
Digital inputs & heat/cool Heating/cooling signal: the bits are set when the unit is ON and the set point has not
request been reached. Especially useful for energy saving functions.
Lock keypad from panel This variable is used to disable the buttons on the terminal so as to prevent accidental
settings. Useful for centralised systems (hotels, offi ces etc.).

4.4 Alarms

Below is the table of alarms.
Alarm
Eeprom fault on power up
Slave offl ine in CAN network
Room probe fault
Probe B2 or B3 fault
Window alarm A05
Circulating pump stopped
Local stop
Antifreeze alarm
Dirty fi lter alarm
MasterAria +030220481 - rel. 1.0 - 12.11.2007
3 4
AL
ON
OFF
S
100%
0%
Fig. 4.y.b
Display Eff ect
A01 Stop fan (with extra fl ush for heater).
Close hot/cold water valves. Switch off heater.
A02
A03
A04
A05
A06
A07
A08
AHU 100% outside air:
•
Stop fan (after optional
extra fl ush with heater)
•
Close outside damper
•
Open heating valve
•
Open cooling valve when
no heating valve
A09 Signal only on terminal
Key
2
1. cooling
2. heating
3. T - T
OUTSIDE ROOM
Prog Description
15 Function of probe B1
t
6 Outside probe
16 Function of probe B2
(see par. table)
17 Function of probe B3
(see par. table)
t
39 Confi g. output NO4
24 ON/OFF recovery
bypass damper
40 Confi guration of output
NO5 (see P39)
41 Confi guration of output
t
NO6 (see P39)
42 Confi guration of output
NO7 (see P39)
127 Close bypass damper
set point
AHU with recirculation:
•
Fan operating
•
Close outside damper
•
Activate heating device (heater or
valve)
•
Open cooling valve, with no heating
valve or heater
•
Open bypass damper
34
4. T - T
ROOM OUTSIDE
t time
AL antifreeze alarm
S recovery bypass damper
Def1 Def2 Def3 Min Max
7 7 7 0 7
4 2 4 7
6 6 6 0 7
13 13 9 0 24
14 21 10 0 24
23 18 19 0 24
0 24 20 0 24
20 20 20 0 255
Type SV ind Modbus® ind R/W
A 74 74 R
I 83 211 R/W
A 76 76 R
I 81 209 R
I 78 206 R/W do not
modify
Notes
Load defaults or reset from
key
UOM
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°C/10
Tab. 4.n
Tab. 4.o
Priority
1
2
3
4
5
6
7
8
9
Tab. 4.p