Code Description Def Min Max UOM User
User
terminal
/AA
Assign analogue output for modulating fans
0 = not configured
1 = analogue output 1 (Y1)
2 = analogue output 2 (Y2)
0 0 2 - M NO
/Ab Assign analogue output for modulating valve - see /AA 0 0 2 - M NO
/Ac
Assign analogue output for modulating anti-sweat heaters - see
/AA
0 0 2 - M NO
5.1.4 Digital outputs
MPXone has 4 digital outputs: NO1, NO2, NO3, NO4. To associate the digital outputs with the available
functions, set parameters DOA, DOb, ... DOq to the value of the physical digital output. See the parameter
table.
Digital output functions
Digital output assignmentfor: Par. Default
Solenoid/compressor DOA Digital output 3 (NO3)
Alarm DOb -
Auxiliary DOc -
Auxiliary serving the MASTER on the SLAVES DOd -
Light DOE Digital output 4 (NO4)
Light serving the Master on the Slaves DOF -
Defrost DOG Digital output 1 (NO1)
Auxiliary evaporator defrost DOH -
Evaporator fans DOI Digital output 2 (NO2)
Output associated with the timer function DOo -
Condensate drain heater DOP -
Anti-sweat heater DOQ -
If the opposite logic to the default setting is required, or to correct a wiring error, the logic of the
functions associated with the digital outputs using parameters rOA, rOb, ... rOp can be reversed.
Code Description Def Min Max UOM User User terminal
rOA, rOb, ... rOP
Digital output logic ...
0/1 = direct /reverse
0 0 1 - M NO
Solenoid/compressor (par. DOA)
This allows the liquid solenoid valve to be used in applications with thermostatic expansion valves.
Code Description Def Min Max UOM User
User
terminal
DOA
Assign solenoid/comp. digital output
0 = not set 3 = digital output 3 (NO3)
1 = digital output 1 (NO1) 4 = digital output 4 (NO4)
2 = digital output 2 (NO2)
3 0 4 - S NO
Alarm (par. DOb)
The relay associated with the alarm function can work as follows:
l normally de-energised: the relay is energised when an alarm occurs (rOA = 0);
l normally energised: the relay is de-energised when an alarm occurs (rOA = 1);
Note: operation with the relay de-energised (rOA = 0) when an alarm occurs ensures maximum safety
when the alarm is due to a power failure or power cable disconnection.
Code Description Def Min Max UOM User
User
terminal
DOb Assign alarm digital output - see DOA 0 0 4 - S NO
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