Rievtech EXM-12DC-DA-R-HMI, User Manual

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rises to higher than the maximum temperature during the defrost cycle, the defrost output reverts to OFF
even if it has not finished. This output can be triggered and stopped by means of the corresponding inputs.
Connection Description
Input
VALIDATION
function validation input. The function remains inactive for as long as this input is not
activated. VALIDATION is implicitly active if it is not connected.
Input
TEMPERATURE
Air temperature in °C*100 (-32768°C to 32767°C).
Input
MANUAL
DEFROST ON
Sets the defrost output to ON if the temperature is less than the maximum
temperature.
Input
MANUAL
DEFROST OFF Sets the defrost output to OFF (Priority stop).
Output
DEFROST
The defrost output is at ON when the CUMULATIVE OPERATING TIME has elapsed.
Output :
ALARM
the alarm is optional ; where it is validated parameters, the user has the choice
between an absolute alarm, i.e. independent of any change to the preset value, and
a relative alarm, which is dependent on the preset value :
Absolute Alarm : the user configures a value. When the value measured exceeds this
value, the ALARM output switches to logic state 1.
Relative Alarm : the user configures a difference. When the value measured is
outside the range "preset value minus difference/preset value plus difference", the
ALARM output switches to logic state 1. The values of the limits defining the range
are recalculated each time the preset value is changed.
Output
CUMULATIVE
TIME
:
Measured duration, in minutes, when the temperature is less than the minimum
temperature or duration of the current defrost cycle.
Parameters CUMULATIVE OPERATING TIME: Time T, in minutes, at the end of which the function
triggers defrosting (1 to 32767).
DEFROST CYCLE: Duration of defrosting in minutes (1 to 32767).
MAXIMUM TEMPERATURE: Temperature in °C above which defrosting is stopped
(10°C ... 20°C).
MINIMUM TEMPERATURE: Temperature in °C below which the time T is measured
(-10°C ... 0°C).