1592023130 XM670K_XM679K GB r4.2 26.06.2017.docx
XM670K - XM679K
6/10
CrE
Continuous regulation activation (Only XM679K):
(n÷Y) n= standard regulation; Y=
continuous regulation. Use it only in centralized plants;
LS
Minimum set point limit:
(-55.0°C
SET; -67°F÷SET) Sets the minimum acceptable value for
the set point.
US
Maximum set point limit:
(SET
150°C; SET÷302°F) Set the maximum acceptable value for set
point.
OdS
Outputs activation delay at start up:
(0÷255 min) This function is enabled at the initial start up
of the instrument and inhibits any output activation for the period of time set in the parameter.
(AUX and Light can work)
AC
Anti-short cycle delay:
(0÷60 min) interval between the solenoid valve stop and the following
restart.
CCt
Compressor ON time during continuous cycle:
(0.0÷24.0h; resolution 10min) Allows to set
the length of the continuous cycle: compressor stays on without interruption for the CCt time. Can
be used, for instance, when the room is filled with new products.
CCS Set point for continuous cycle:
(-55÷150°C / -67÷302°F) it sets the set point used during the
continuous cycle.
Con solenoid valve ON time with faulty probe:
(0÷255 min) time during which the solenoid valve is
active in case of faulty thermostat probe. With COn=0 solenoid valve is always OFF.
CoF solenoid valve OFF time with faulty probe:
(0÷255 min) time during which the solenoid valve
is off in case of faulty thermostat probe. With COF=0 solenoid valve is always active.
DISPLAY
CF
Temperature measurement unit: °C=
Celsius;
°F
=Fahrenheit. !!!
WARNING !!!
When the
measurement unit is changed
the parameters
with temperature values
have to be checked
.
PrU
Pressure mode:
(rEL or AbS) it defines the mode to use the pressure. !!!
WARNING
!!! the setting
of PrU is used for all the pressure parameters. If PrU=rEL all pressure parameters are in relative
pressure unit, if PrU=AbS all pressure parameters are in absolute pressure unit.
(Only XM679K)
PMU Pressure measurement unit:
(bAr
–
PSI - MPA) it selects the pressure measurement units.
MPA= the value of pressure measured by kPA*10.
(Only XM679K)
PMd Way of displaying pressure :
(tEM - PrE) it permits showing the value measured by pressure
probe with
tEM=
temperature or by
PrE=
pressure;
(Only XM679K)
rES
Resolution (for °C)
: (in = 1°C; dE = 0.1 °C) allows decimal point display;
Lod
Instrument display
: (nP; P1; P2, P3, P4, P5, P6, tEr, dEF) it selects which probe is displayed by
the instrument.
P1, P2,
P3, P4
,
P5
,
P6
,
tEr=
virtual probe for thermostat,
dEF=
virtual probe for
defrost.
red
Remote display
: (nP; P1; P2, P3, P4, P5, P6, tEr, dEF) it selects which probe is displayed by
the X-REP.
P1, P2,
P3, P4
,
P5
,
P6
,
tEr=
virtual probe for thermostat,
dEF=
virtual probe for
defrost.
dLy
Display delay:
(0 ÷24.0 m; resolution 10s) when the temperature increases, the display is
updated of 1 °C/1°F after this time.
rPA
Regulation probe A:
(nP; P1; P2, P3, P4, P5) first probe used to regulate room temperature. If
rPA=nP the regulation is performed with real value of rPb.
rPb
Regulation probe B:
(nP; P1; P2, P3, P4, P5) second probe used to regulate room temperature.
If rPb=nP the regulation is performed with real value of rPA
rPE
Regulation virtual probe percentage:
(0 ÷ 100%)
it
defines the percentage of the rPA respect
to rPb. The value used to regulate room temperature is obtained by:
value_for_room = (rPA*rPE + rPb*(100-rPE))/100
ELECTRONIC EXPANSION VALVE SUBMENU (Only XM679K)
FtY
Kind of gas:
LABEL
REFRIGERANT
OPERATING RANGE
R22
r22
-50-60°C/-58÷120°F
134
r134A
-50-60°C/-58÷120°F
290
r290
–
Propane
-50-60°C/-58÷120°F
404
r404A
-70-60°C/-94÷120°F
47A
r407A
-50-60°C/-58÷120°F
47C
r407C
-50-60°C/-58÷120°F
47F
r407F
-50-60°C/-58÷120°F
410
r410A
-50-60°C/-58÷120°F
448
r448A
-45-60°C/-69÷120°F
449
r449A
-45-60°C/-69÷120°F
450
r450A
-45-60°C/-69÷120°F
507
r507
-70-60°C/-94÷120°F
513
r513A
-45-60°C/-69÷120°F
CO2
r744 - Co2
-50-60°C/-58÷120°F
Atu
Minimum STABLE superheat search (
No; yES) This parameter enables the search of the minimum
stable superheat. The lowest admitted value is LSH+2°C
AMS
Self self adaptive SH regulation enabling
(No; yES) This parameter enables the self adaptive
regulation of the superheat.
CrE = no must to be set, when this function is enabled
.
SSH
Superheat set point:
[0.1°C ÷ 25.5°C] [1°F ÷ 45°F]
it’s the v
alue used to regulate superheat
CyP
Cycle Period:
(1 ÷ 15s) it permits to set cycle time;
Pb
Proportional band:
(0.1 ÷ 60.0 / 1÷108°F)
PI proportional band
;
rS
Band Offset:
(-12.0 ÷ 12.0°C / -21÷21°F) PI band offset;
inC
Integration time:
(0 ÷ 255s) PI integration time;
PEO Probe Error opening percentage:
(0÷100%) if a temporary probe error occurs, valve opening
percentage is
PEo
until
PEd
time is elapsed;
PEd
Probe Error delay before stopping regulation:
(0÷239 sec.
–
On=unlimited) if probe error
duration is bigger than
PEd
then valve totally closes.
Pf
message is showed. If
PEd=On
valve
opening is
PEo
until probe error finishes;
OPE Start opening Percentage:
(0÷100%) Opening valve percentage when start function is active.
This phase duration is
SFd time
;
SFd
Start Function duration:
(0.0 ÷ 42.0 min: resolution 10s) It sets start function duration and post-
defrost duration.
During this phase the alarms are neglected
;
OPd
Opening Percentage after defrost phase:
(0÷100%) Opening valve percentage when after
defrost function is active. This phase duration is
Pdd time
;
Pdd
Post Defrost Function duration:
(0.0 ÷ 42.0 min: resolution 10s) It sets start function duration
and post-defrost duration.
During this phase the alarms are neglected
;
MnF
Maximum opening percentage at normal Functioning:
(0÷100%) during regulation it sets the
maximum valve opening percentage;
dCL
Delay before stopping valve regulation:
(0 ÷ 255s) When the cooling request goes off, the
electronic valve regulation can go on for the dCL time in order to prevent uncontrolled superheat
variation;
Fot
Forced opening percentage:
(0÷100% -
nu
) it permits to force the valve opening to the specified
value. This value overwrite the value calculated by PID algorithm.
!!!! WARNING !!!!
to obtain
the correct superheat regulation you have to set
Fot=nu
;
PA4
Probe value At 4mA or At 0V:
(-1.0 ÷ P20 bar / -14 ÷ PSI / -10 ÷ P20 kPA*10) pressure value
measured by probe at 4mA or at 0V (related to PrM parameter)
Referred to Pb5
P20
Probe value 20mA or At 5V:
(PA4 ÷ 50.0 bar / 725 psi / 500 kPA*10) pressure value measured
by probe at 20mA or at 5V (related to PrM parameter)
Referred to Pb5
LPL
Lower Pressure Limit for superheat regulation:
(PA4 ÷ P20 bar / psi /
kPA*10
) when suction
pressure comes down to LPL the regulation is performed with a LPL fixed value for pressure,
when pressure comes back to LPL the normal pressure value is used. (related to PrM parameter)
MOP Maximum Operating Pressure threshold:
(PA4 ÷ P20 bar / psi /
kPA*10
)
if suction pressure
exceeds maximum operating pressure value, instrument signals situation with MOP alarm.
(related to PrM parameter)
LOP
Lowest Operating Pressure threshold:
(PA4 ÷ P20 bar / psi /
kPA*10
) if the suction pressure
comes down to this value a low pressure alarm is signalled with LOP alarm. (related to PrM
parameter)
dML
delta MOP-LOP:
(0 ÷ 100%) when a MOP alarm occurs valve will close of the dML percentage
every cycle period until MOP alarm is active. When LOP occurs valve will open of the dML
percentage every cycle period until LOP alarm is active.
MSH Maximum Superheat alarm:
(LSH ÷ 80.0°C / LSH ÷ 144°F) when superheat exceeds this value
an high superheat alarm is signalled after interval
SHd
LSH
Lowest Superheat alarm:
(0.0 ÷ MSH °C / 0÷MSH °F) when superheat goes down to this value
a low superheat alarm is signalled after interval
SHd
SHy
Superheat alarm Hysteresis:
(0.1÷25.5°C/1÷45°F) hysteresis for superheat alarm deactivation
SHd
Superheat alarm activation delay:
(0.0 ÷ 42.0 min: resolution 10s) when a superheat alarm
occurs, the time SHd have to pass before signalling alarm;
FrC
Fast-recovery Constant:
(0÷100 s) permits to increase integral time when SH is below the set-
point. If
FrC=0
fast recovery function is disabled.
Sub
Pressure filter
(0÷100) It uses the last average values of the pressure to calculate the superheat.
SLb
Reaction time
(0÷255s): time to update the
valve open percentage.
EI. With SLb = 24: the valve open percentage is updated every 24s.
DEFROST
dPA
defrost Probe A:
(nP; P1; P2, P3, P4, P5) first probe used for defrost. If rPA=nP the regulation
is performed with real value of dPb.
dPb
defrost Probe B:
(nP; P1; P2, P3, P4, P5) second probe used for defrost. If rPB=nP the
regulation is performed with real value of dPA.
dPE
defrost virtual probe percentage:
(0÷100%)
it
defines the percentage of the dPA respect to
dPb. The value used to regulate room temperature is obtained by:
value_for_defrost= (dPA*dPE + dPb*(100-dPE))/100
tdF
Defrost type
: (EL
–
in) EL = electrical heater; in = hot gas;
EdF
Defrost mode
: (rtc
–
in)
(only if RTC is present)
rtc=
defrost activation via RTC;
in=
defrost
activation with
idf
.
Srt
Heater set point during defrost:
(-55.0 ÷ 150.0°C; -67 ÷ 302°F) if
tdF=EL
during the defrost
the defrost relay perform an ON/OFF regulation with
Srt
as set point.
Hyr
Differential for heater
: (0.1°C ÷ 25.5°C , 1°F ÷ 45°F) the differential for heater;
tod
Time out for heater:
0 ÷ 255 (min.) if the defrost probe temperature is bigger than
Srt
for all
tod
time the defrost ends altough the defrost probe temperature is lower than dtE or dtS. It permits to
reduce defrost duration;
dtP
Minimum temperature difference to start defrost:
[0.1°C ÷ 50.0°C] [1°F ÷ 90°F]
if the
difference between the two defrost probes stays lower than
dtP
for all
ddP
time the defrost is
activated;
ddP
Delay before starting defrost (related to dtP):
(0 ÷ 60 min)
delay
related to
dtP
.
d2P
Defrost with two probes:
(n
–
Y)
n=
only the dPA probe is used to defrost management;
Y=
defrost is managed with
dPA
probe and
dPb
probe. Defrost can performed only if both probe
value are lower than dtE for dPA probe and dtS for dPb probe;
dtE
Defrost termination temperature (Probe A):
(-55,0÷50,0°C; -67÷122°F) (Enabled only when
the evaporator probe is present) sets the temperature measured by the evaporator probe
dPA
which causes the end of defrost;
dtS
Defrost termination temperature (Probe B):
(-55,0÷50,0°C; -67÷122°F) (Enabled only when
the evaporator probe is present) sets the temperature measured by the evaporator probe
dPb
which causes the end of defrost;
IdF
Interval between defrosts:
(0÷120h) Determines the time interval between the beginning of two
defrost cycles;
MdF Maximum duration of defrost:
(0÷255 min) When
dPA
and
dPb
aren’t present
, it sets the
defrost duration, otherwise it sets the maximum duration for defrost;
dSd
Start defrost delay
: (0 ÷ 255 min) This is useful when different defrost start times are necessary
to avoid overloading the plant.
dFd Display during defrost: rt
= real temperature;
it
= temperature reading at the defrost start;
Set
= set point;
dEF
= “dEF” label;
dAd Defrost display time out:
(0
255 min) Sets the maximum time between the end of defrost and
the restarting of the real room temperature display.
Fdt
Drain down time:
(0÷255 min.) time interval between reaching defrost termination temperature
and the restoring of the control’s normal operation. Thi
s time allows the evaporator to eliminate
water drops that might have formed due to defrost.
dPo First defrost after start-up: y
= Immediately;
n
= after the IdF time
dAF
Defrost delay after continuous cycle:
(0÷23.5h) time interval between the end of the fast
freezing cycle and the following defrost related to it.
FAN
FPA
Fan probe A:
(nP; P1; P2, P3, P4, P5) first probe used for fan. If FPA=nP the regulation is
performed with real value of FPB;
FPB
Fan probe B:
(nP; P1; P2, P3, P4, P5) second probe used for defrost. If FPB=nP the regulation
is performed with real value of FPB;
FPE
Fan virtual probe percentage:
(0÷100%)
it
defines the percentage of the FPA respect to FPb.
The value used to regulate room temperature is obtained by:
value_for_defrost= (FPA*FPE + FPb*(100-FPE))/100
FnC
Fan operating mode: C-n
= running with the solenoid valve, OFF during the defrost;
C-y
=
running with the solenoid valve, ON during the defrost;
O-n
= continuous mode, OFF during the
defrost;
O-y
= continuous mode, ON during the defrost;
Fnd Fan delay after defrost:
(0÷255 min)
The time interval between the defrost end and evaporator
fans start.
FCt
Temperature differential avoiding short cycles of fans (
0.0°C ÷ 50.0°C; 0°F ÷ 90°F) If the
difference of temperature between the evaporator and the room probes is more than the value of
the Fct parameter, the fans are switched on;
FSt
Fan stop temperature:
(-50÷110°C; -58÷230°F) setting of temperature, detected by evaporator
probe, above which the fan is always OFF.
FHy
Differential to restart fan:
(0.1°C ÷ 25.5°C) (1°F ÷ 45°F) when stopped, fan restarts when fan
probe reaches FSt-FHy temperature;
Fod
Fan activation time after defrost: (
0 ÷ 255 min.) it forces fan activation for indicated time;
Fon
Fan ON time:
(0÷15 min)
with
Fnc = C_n or C_y, (fan activated in parallel with compressor). it
sets the evaporator fan ON cycling time when the compressor is off. With Fon =0 and FoF
≠ 0
the fan are always off, with Fon=0 and FoF =0 the fan are always off.
FoF
Fan OFF time:
(0÷15 min)
with
Fnc = C_n or C_y, (fan activated in parallel with compressor). it
sets the evaporator fan off cycling time when the compressor is off. With Fon =0 and FoF
≠ 0 the
fan are always off, with Fon=0 and FoF =0 the fan are always off.
MODULATING OUTPUT (AnOUT) if present
trA
Kind of regulation with PWM output:
(UAL
–
rEG
–
AC) it selects the functioning for the PWM
output.
UAL=
the output is at FSA value;
rEG=
the output is regulated with fan algorithm
described in fan section;
AC
= anti-sweat heaters control (require the XWEB5000 system);
