Carel MPXone - Page 38

38
ENG
mpxone +0300086EN rel. 2.2 - 13.11.2023
Functions
5.1.2 Digital inputs
MPXone manages up to 5 physical digital inputs and 1 virtual digital input. See “Installation”.
To associate a physical or virtual input to each available function, set parameters DIA, DIb, ... DIr to the value relating to the phys-
ical or virtual digital input. See the parameter table.
Digital input functions
Digital input assignment for: Par.
Contact
Open Closed
immediate external alarm DIA Active Not active
delayed external alarm DIb Active Not active
enable defrost DIc Not enabled Enabled
start defrost DId Not active Active
door switch with stopping control DIE Door open Door closed
remote ON/OFF DIF OFF ON
curtain switch/light DIG Day status Night status
start/stop continuous cycle DIH Not active Active
digital input monitoring DII Active Not active
timed digital input DIL Active Not active
switch to standby status DIM Active Not active
switch to clean status DIn Active Not active
change working set DIo Set 1 Set 2
door switch without stopping control DIp Door open Door closed
defrost corresponding to digital input status DIr Not active Active
enable alternative superheat set point DIv Inactive Active
Tab. 5.e
Parameters rIA, rIb,..., rIs can be used to reverse the logic of the functions associated with the digital inputs.
Code Description Def Min Max UOM
rIA, rIb, ... rlv Reverse digital input logic 0 0 1 -
Notice: reversing the logic has no effect on the virtual DI
The virtual digital input is a function by which the status of a digital input is broadcast via LAN (RS485) from main to secondary.
This is useful, for example, when using a switch to change from day to night status and vice-versa without extra wiring from the
main to the secondary devices. The virtual digital input can be set by the supervisor or by the main, according to the setting of
parameter A9 (set only on the main).
Code Description Def Min Max UOM User User terminal
A9 Select digital input broadcast from main to secondary devices (only on main)
Val. Desc. Val. Desc.
-1 from the supervisor 3 digital input 1 (ID3)
0 disabled 4 digital input 1 (ID4)
1 digital input 1 (ID1) 5 digital input 1 (ID5)
2 digital input 1 (ID2)
1-15- S NO
Setting parameters DIA, DIb, ... DIr to -1 allows the virtual digital input to be selected on the secondary as an input. If needed,
different functions can be configured on the secondary devices, meaning when the status of the contact on the main changes,
different functions are activated on the secondary devices.
Code Description Def Min Max UOM
DIA, DIb, ... DIr Assign digital input function
...
- 1: serial digital input
0-15-
Immediate external alarm (par. DIA)
Activation of the alarm causes:
• message ‘IA’ shown on the display and ALARM flashing;
• activation of the buzzer (see par. H8);
• activation of the alarm relay (see par. DOb);
• deactivation of the solenoid/compressor output (see par. A10).
Notice: activation of the external alarm shuts down the evaporator fans only if these follow the status of the compressor
output, as set for parameter F2. When the compressor is shut down due to an external alarm the compressor minimum ON time
is ignored (parameter c3).
Code Description Def Min Max UOM User User terminal
DIA Select digital input broadcast from main to secondary devices (only on main)
Val. Desc. Val. Desc.
-1 from the supervisor 3 digital input 3 (ID3)
0 disabled 4 digital input 4 (ID4)
1 digital input 1 (ID1) 5 digital input 5 (ID5)
2 digital input 2 (ID2)
1-15- S NO