Carel PRK300D0E0, User Manual, Page: 28 / 104

28
ENG
pRack +0300025EN rel. 1.3 - 17.12.2015
4.1.3 Advanced confi guration
Start up
Select Config.Item:
ADVANCED CONFIGURATION
It only defines the
structure of the plant
For very expert users
This solution is used to establish the confi guration of the pLAN structure
required for correct system operation.
Once the procedure for selecting the various factors that aff ect the fi nal
confi guration has been completed, the pRack pR300 software verifi es
whether the pLAN confi guration is exact and prepares the user interface
for confi guration of the parameters that need to be set manually by the
user.
Important : this confi guration solution is only recommended for
expert users, as all the system parameters need to be set manually.
4.1.4 Associating the inputs and outputs
When using pre-confi gurations and the wizard, pRack pR300 can
automatically associate the board’s inputs and outputs with the various
functions.
For the wizard only, after having confi gured the lines, automatic association
can be chosen as an option. If choosing not to use this function, the I/Os
need to be confi gured manually, according to requirements.
The criteria applied for automatic association are described below.
Digital outputs
pRack pR300 assigns in order:
•
Compressor outputs: fi rst the SSR outputs for screw or Digital Scroll™
then the starting outputs, the capacity control valves and the inverter,
if present
•
Fan outputs
•
Global alarm.
Digital inputs
pRack pR300 assigns in order:
•
High and low pressure switches (HP and LP)
•
Compressor alarms
•
Fan alarms
Note : pRack pR300 can also use certain analogue inputs as digital
inputs, nonetheless the common HP and LP pressure switches are always
associated with actual digital inputs.
Analogue inputs
pRack pR300 assigns in order:
•
Pressure or temperature control probes for 1 or 2 lines, according to the
settings made. The types of probe asSigned as default are 4…20 mA
or 0 to 5 V (fi rst 4…20 mA, then 0 to 5 V if necessary) for the pressure
probes, NTC for the suction temperature probes and HTNTC for the
condensing temperature probes;
•
Suction temperature probe on line 1: if possible this is associated with
input B3, otherwise the fi rst free input;
•
Discharge temperature probe on line 1;
•
Suction temperature probe on line 2;
•
Discharge temperature probe on line 2.
Analogue outputs
pRack pR300 assigns in order:
•
Compressor inverters for 1 or 2 lines;
•
Fan modulating devices for 1 or 2 lines.