1592001440 XC645CX GB r3.4 31.10.2017.docx XC645CX 38/54
18.4 Analog output “free”
This setting is used to link the analog output 1 to a temperature probe. The analog output will take
values proportional to the temperatures detected by the probe P3 or P4, according to the setting.
18.4.1 Analog output “free” configurations and Parameters
Set the output to drive for instance a de-
superheater
Reference probe for the
analog output 1 (used only if
AOP=FrE)
It’s possible to set only P3 or P4 probes.
P3 must be set as temperature probe:
P3C = nt10 (NTC 10K) or nt86 (NTC 86K)
Temperature value
associated to minimum value
of analog output AOM.
It’s the start scale of the analog output
Temperature value
associated to the maximum
value of analog output (10V)
It’s the end scale of the analog output
Minimum value for analog
output
The minimum voltage is 0V.
NOTE: verify on the inverter of ECI fan of
chopped phase driver that with this input a
proper output is supplied to the fan.
Time of analog output at max
after the start
With AOt = 5 the controller supplies 10V output
for 5s at fan start, then starts standard
regulation
Maximum % variation per
minute
The analog output takes 1 min to move from
the min to the maximum
18.4.2 How to set it
Parameters involved: AoC = tEn, AoF = FrE, AOP = P3: LAO = 20; UAO = 40; Aot = 0, AOM = 30,
MPM = 100
P3
Volt
10
0
AOM
100
10
LAO
UAO
LAO + (UAO-LAO)*AOT
100
a. Set the kind of signal of the analog output current (4-20ma) or voltage (0-10V) by the Analog
output setting parameter “AoC”: tEn = 0÷10V output; cUr = 4-20mA output
b. Set the function of the analog output: AoF = FrE
c. Set the time of the analog output at max after start up EI: Aot = 3s
d. Set the start scale temperature by LAO parameter, at which correspond the AOM value of
analog output
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