Alfa Laval AquaFirst
Installation, service and operating instruction
36
10
Parameters list
There are more than 100 different variables used in the controller. Most of them are used for internal programs
and calculations. Here we describe the main points.
Name
Description
Unit
Modbus
Address*
Therm_Protec P1
Ipsothermic input from P1 pump
0/1
11
Therm_Protec P2
Ipsothermic input from P2 pump
0/1
12
Therm_Protec P3
Ipsothermic input from P3 pump
0/1
13
Therm_Protec P4
Ipsothermic input from P4 pump
0/1
14
PD_Cmd_P1
P1 command. It is the pump Start/Stop output
On/Off
15
PD_Cmd_P2
P2 command. It is the pump Start/Stop output
On/Off
16
PD_Cmd_P3
P3 command. It is the pump Start/Stop output
On/Off
17
PD_Cmd_P4
P4 command. It is the pump Start/Stop output
On/Off
18
PriP1_Alarm_On
Primary pump 1 default
0/1
19
PriP2_Alarm_On
Primary pump 2 default
0/1
20
Sec_P3_Fault
Secondary pump3 default
0/1
25
Sec_P4_Fault
Secondary pump4 default
0/1
26
PDMain_Alarm
General Alarm
0/1
28
High_Temp_Alarm
High temperature alarm on S1 sensor
0/1
29
Fouling_Alarm
Fouling heat exchanger Alarm
0/1
30
Ret_High_Alarm
High temperature alarm on S2
0/1
31
ThermTr_Alarm
Thermal treatment failed
0/1
32
SAFETY_FCT
The safety function state
0/1
35
Disp_Leg_active
Thermal treatment running
0/1
36
Remote_Control
The unit is remotely controlled
0/1
37
BOOSTMode
Booster function activated
0/1
41
ECOMode
ECO function activated
0/1
42
Tank_load
Tank loaded (sensor S2 need to be connected)
0/1
44
PA10_valve1
Primary valve actuator
0-100%
47
S1_10
Secondary Outlet temperature measurement
(S1 sensor)
°C
50
S2_10
Secondary Inlet temperature measurement
(S2 sensor if present)
°C
51
S3_10
Primary Outlet temperature measurement
(S3 sensor if present)
°C
52
S1_PID_SP_10
Current temperature set point of the main control
loop on S1
°C
62
High_Alm_Reset
To Reset an high temperature alarm
On/Off
201
Pump_Fault_Reset
Resets a pump fault
On/Off
202
SP_T_Sec_Outlet
Domestic Hot Water Setpoint (S1)
°C
211
ThTr_Setpoint
Thermal treatment temperature set point
°C
213
PD_Triac_Output
230V Triac output state.
On/off
33
* Please refer to “MODBUS” section in next pages.
