24
ATR 142 - User manual
tune
is selected as
man.
;
a.ma.i.
: If parameter 49
au.ma.
is selected as
en.
or
en.st.
con-
troller switch from automatic to manual functioning;
a.ma.c.
: If parameter 49
au.ma.
is selected as
en.
or
en.st.
ATR142 works in automatic mode if input is open or in ma-
nual mode if input is closed.
t.1.s.s.
: timer 1 Start/Stop, (par. 8.)
NB
: digital input functions
are not
available with sensors PT100,
NI100, NTC, PTC, PT500, PT1000 and potentiometers.
7.12
Dual Action Heating-Cooling
ATR142 is suitable also for systems requiring a combined
heating-cooling action.
Main command output must be configured foe hearting PID
(
act.t.
=
Heat
and
p.b.
must be greater than 0), and one of
the alarms (
AL.1
or
AL. 2
) must be configured as
cooL.
Com-
mand output must be connected to the actuator responsible
for heat, while the alarm output will control cooling action.
Parameters to configure for the Heating PID are:
act.t.
=
Heat
Command output type (Heating)
p.b.
: Heating proportional band
t.i.
: Integral time of heating and cooling
t.d.
: Derivative time of heating and cooling
t.c.
: Heating time cycle
The parameters to configure for the Cooling PID are the
following (example: action associated to alarm1):
AL. 1
=
cooL
Alarm1 selection (cooling)
p.b.m.
: Proportional band multiplier
Summary of Contents for ATR 142 Series
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