EVCO EC6708 - Manual (Page 13)

Every Control S.r.l.
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analog output signal is proportional to the number of condenser fans
activated on the number of relay outputs associated to the condenser
fans, for instance 4).
Speaking of analog output
• the parameter outF permits to display the percentage of the
analog output signal
the parameter outF belongs to the Operator Menu; see the chapter
Operator Menu on the page 29
• the parameter F 0 establishes the proportional band width
• the parameter F 1 establishes the condensing quantity value
to which the instrument activates the condenser fans
• the parameter F A establishes the condenser fans functioning
the parameters F 0, F 1 and F A belong to the use Menu; see the
chapter User Menu on the page 32.
DIGITAL INPUTS
The instrument is provided with twelve digital inputs configurable to
interact on the relay outputs activity.
Activating the user associated to the output K1 ... 8 locking digital input
the instrument activates the user associated to the output K1 ... 8
locking digital input alarm (see the paragraph Alarms on the page 46).
Activating the freon level digital input the instrument activates the freon
level digital input alarm (see the paragraph Alarms on the page 46).
Activating the condenser fans safety digital input the instrument acti-
vates the condenser fans safety digital input alarm (see the paragraph
Alarms on the page 46).
Activating the upper condensing quantity digital input the instrument
activates the upper condensing quantity digital input alarm (see the
paragraph Alarms on the page 46) and it increases an upper condens-
ing quantity alarms counter as long as the number of upper condens-
ing quantity alarms enough to give the instrument locking gets reached
(the increasing of the upper condensing quantity alarms counter gets
given also by the upper condensing quantity alarm activation; see the
paragraph Upper condensing quantity alarm on the page 15); to
unlock the instrument turn off and turn on again the instrument.
FUNCTIONING
Condensing quantity regulation - Analog output - Digital inputs
hours of the user associated to the output K1 ... 8
• the parameter tyP1 ... 8 establishes the user to associate to the
output K1 ... 8
the parameters Hr 1 ... 8 and tyP1 ... 8 belong to the Configurator
Menu; see the chapter Configurator Menu on the page 25
• the parameter Pb F permits to display the quantity read by the
condensing probe
the parameter Pb F belongs to the Operator Menu; see the chapter
Operator Menu on the page 29
• the parameter / t establishes the unit of measure with which
the temperature gets displayed
• the parameter /bE establishes the kind of condensing probe
that the instrument must recognize
• the parameter F 0 establishes the proportional band width
• the parameter F 1 establishes the condensing quantity value
to which the instrument activates the condenser fans
• the parameter F A establishes the condenser fans functioning
• the parameter F d establishes the method used by the instru-
ment to compute which condenser fans activate/deactivate
• the parameter F H establishes the number the total working
hours of a condenser fans enough to signal the request of
service (see the paragraph Alarms on the page 46)
the parameters / t, /bE, F 0, F 1, F A, F d and F H belong to the User
Menu; see the chapter User Menu on the page 32.
ANALOG OUTPUT
The 4-20 mA or 0-10 V analog output is associated to the condenser
fans.
The parameter F A establishes the condenser fans functioning and
then the analog output functioning: it is function of the quantity read by
the condensing probe (in this case the analog output signal is propor-
tional to the error between the condenser fans activation setpoint and
the quantity read by the condensing probe in every point of the pro-
portional band) ...
... or function of the power steps loading/unloading (in this case the