1592026601 XWi70K STD FULL EN r1.6 2022.07.29.docx XWi70K 3/15
- If MnP=oFF, then the compressor will be stopped for tMA if it works continuously for tMi
10.7 PI ALGORITHM
The VSC regulator implements a PI (Proportional-Integral) algorithm to guarantee temperature stability
always near the setpoint. Here below there are some advises for parameter settings in some
applications.
Low Temperature Applications
Normal Temperature Applications
NOTE:
- Every application needs specific tuning tests to find the optimal values.
- Use HY < HY1 (better if 2*HY <= HY1) in Low Temp Applications
- Use HY > HY1 (better if HY >= 2*HY1) in Normal Temp Applications
11 SPECIAL FUNCTIONS
By using the parameters oAx it is possible to configure the functions of the relay outputs as described
in the following paragraphs:
11.1 LIGHT RELAY (oAx = LiG)
By setting oAx=Lig the relay will work as light relay, it is switched on and off by the light button on the
keyboard and is affected by status of the digital input when i1F=dor.
The parameter LHt (Light timer) sets the time the light will stay on after pressing the light switch on the
keyboard. Every time the key is pushed the timer is re-loaded.
11.2 SECOND COMPRESSOR MANAGEMENT (oAx = CP2)
By setting one of the parameters oAx=CP2, the correspondent relay will operate as “second
compressor”. It will be activated in parallel with the relay of the first compressor, with a possible delay
set in the AC1 parameter (seconds).
11.3 ON/OFF RELAY (oAx = onF)
By setting one of the parameters oAx=onF, correspondent the relay will operate as “on-off” relay: it will
be activated when the controller is switched on and it will be switched off when the controller is in stand-
by status.
11.4 ALARM RELAY (oAx =Alr)
By setting oAx=ALr the correspondent relay will work as alarm relay, it is switched on when an alarm
happens.
Parameters involved:
- tbA (n, Y) Alarm relay silencing
- AoP (cL; oP) Alarm relay polarity
11.5 ANTI-SWEAT HEATER (oAx =tiM)
If oAx=tiM, the correspondent relay will be able to work as Anti-Sweat Heater output.
The relay will work based on the parameters btA (base time setting: seconds or minutes), AtF (output
OFF time) and Ato (output ON time) with the following logic: the relay output will cycle (starting with the
OFF time) between OFF and ON status.
11.6 ENERGY SAVING TIMEOUT
If the Energy Saving function has been activated by buttons or digital input, the Energy Saving will be
automatically deactivated once the time defined in the parameter ESt is expired. If the value of ESt=0
the timeout is not considered and the Energy Saving, once activated by button or digital input, can be
deactivated only manually by the user.
11.7 DEAD BAND (oAx =db)
By setting oAx=db the controller will perform a
“dead band” regulation.
The heating element has to be connected to the
correspondent relay.
If the temperature increases and reaches set
point plus differential (HY) the compressor is
started and then turned off when the temperature
reaches the set point value again.
If the temperature decreases and reaches the set
point minus differential (HY) the output (heater)
is switched on and then turned OFF when the
temperature reaches again the set point.
12 KEYBOARDS
Depending on the type of used keyboard, some special function could be associated to predefined
buttons. Follow here below the complete list of functions:
Normal pressure: to visualize the temperature set point; in programming mode it selects a
parameter or confirm an operation.
Timed: to modify the temperature set point; when max or min temperature value is displayed,
keep it pressed for 3 sec to reset the stored value.
Normal pressure: nu=not special functions; Std=maximum temperature; Lnt=configuration
change; ALr=alarm list
Timed: nu=not special functions; Std=maximum temperature; CC=reload default configuration;
ALr=not used; Pdn=Pull Down activation
Normal pressure: nu=not special functions; Std=minimum temperature; Lnt=configuration
change; ALr=alarm list
Timed: nu=not special functions; Std=maximum temperature; Lnt=configuration change; ALr=
not used; Pdn=Pull Down activation
Normal pressure: nu=not special functions; Pb2=Second probe value; AU1=auxiliary output 1
activation; AU2=auxiliary output 2 activation
Timed: nu=not special functions; Std=maximum temperature; Lnt=configuration change; ALr=
not used; Pdn=Pull Down activation
Normal pressure: nu=not special functions; LiG=light output activation; AU1=auxiliary output
1 activation; AU2=auxiliary output 2 activation; Lnt=configuration change
Timed: nu=not special functions; LiG=light output activation; AU1=auxiliary output 1 activation;
AU2=auxiliary output 2 activation; Lnt=configuration change; rSt=reset
Normal pressure: nu=not special functions; oFF=ON OFF function; ES=energy saving
Timed: nu=not special functions; oFF=ON OFF function; ES=energy saving
Normal pressure: nu=not special functions; AU1=auxiliary output 1 activation; AU2=auxiliary
output 2 activation; LiG=light output activation
Timed: nu=not special functions; AU1=auxiliary output 1 activation; AU2=auxiliary output 2
activation; LiG=light output activation
Normal pressure: nu=not special functions; ES=energy saving
Timed: nu=not special functions; ES=energy saving
12.1 KEYBOARD LOCK
It is possible to select partial or complete keyboard lock:
- brd: type of lock, UnL=unlock; SEL=only buttons SET and ONOFF are available during lock
condition (factory predefined configuration, not changeable); ALL=all buttons locked.
- tLC: power-on interval before locking keyboard
NOTE: a power-off is required to deactivate the keyboard lock function
12.2 CH620 OR VH620 KEYBOARD
12.3 T620T OR T620H KEYBOARD
12.4 T820T OR T820H KEYBOARD
To lock and unlock the keyboard.
To enter the programming mode.
To exit the programming mode.
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