Page 1
The
CX660 keyboard
shall
LSt
uSt
CPP
CHd
Sr
0
Manual settings
Par Par Par Par Par 1 Alco EX4
-
EX5-EX6 5 75 50 10 500 2 Alco EX7
10
160 75 25
500 3 Alco EX8 500 step/s
10
260 80 50
500 4 Danfoss ETS
-
25/50 7 262 10 10
300 5 Danfoss ETS
-
100 10 353 10 10 300
6 Danfoss ETS
-
10
7 Sporlan SEI .5
to 11 0 159 16 5 200
8 Sporlan SER 1.5
to
5
9 Sporlan SEI
30 0 319 16 5
200 10 Sporlan SER(I) G,J,K
0
250 12 5 200 11 Sporlan SEI
-50 0
638 16 5 200 12 Sporlan SEH(I)
-
100 0 638 16 5 200 13 Sporlan SE
H(I)-
175 0 638 16 5 200
SPORLAN
45 BLUE WHITE BLACK
46
BROWN
BLACK
WHITE 47 BLACK
RED RED 48 W
HITE GREEN
GREEN
4. WIRING DIAGRAM AND CONNECTIONS
CONTROLLERS FOR MULTIPLEXED CABINETS
WITH STEPPER DRIVER INSIDE
XM668D
1. GENERAL WARNING ..................................................................................................................................... 1
2. GENERAL DESCRIPTION .............................................................................................................................. 1
3. INSTALLATION AND MOUNTING.................................................................................................................. 1
4. WIRING DIAGRAM AND CONNECTIONS..................................................................................................... 1
5. USER INTERFACE.......................................................................................................................................... 3
6. HOW TO PROGRAM THE PARAMETERS (PR1 AND PR2) ........................................................................ 3
7. FAST ACCESS MENU .................................................................................................................................... 3
8. MENU FOR MULTIMASTER FUNCTION: SEC ............................................................................................. 3
9. COMMISSIONING ........................................................................................................................................... 4
10. DISPLAY MESSAGES .................................................................................................................................... 5
11. USE OF THE PROGRAMMING “HOT KEY“ .................................................................................................. 5
12. CONTROLLING LOADS.................................................................................................................................. 5
13. TECHNICAL DATA .......................................................................................................................................... 7
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
This manual is part of the product and should be kept near the instrument for
easy and quick reference.
The instrument shall not be used for purposes different from those described
hereunder. It cannot be used as a safety device.
Check the application limits before proceeding.
1.2 SAFETY PRECAUTIONS
Check the supply voltage is correct before connecting the instrument.
Do not expose to water or moisture: use the controller only within the operati ng
limits avoiding sudden temperature changes with high atmospheric humidity to
prevent formation of condensation
Warning: disconnect all electrical connections before any kind of maintenance.
Fit the probe where it is not accessible by the End User. The instrument must not
be opened.
In case of failure or fault y operation send the instrument back to the distributor or
to “Dixell S.r.l.” (see address) with a detailed description of the fault.
Consider the maximum current which can be applied to each relay (see
Technical Data).
Ensure that the wires for probes, loads and the power su pply are separated and
far enough from each other, without crossing or intertwining.
In case of applications in industrial environments, the use of mains filters (our
mod. FT1) in parallel with inductive loads could be useful.
2. GENERAL DESCRIPTION
The XM668D is a microprocessor based controller for multiplexed cabinets suitable
for applications on medium or low temperature. It can be inserted in a proprietary
LAN with up to 8 different sections which can operate, depending on the
programming, as stand alone controllers or following the commands coming from the
other sections. The XM668D is provided with 4 relay outputs to control the solenoid
valve, defrost - which can be either electrical or hot gas - the evaporator fans, the
lights, and with the stepper valve driver. The device is also equipped with six probe
inputs: for temperature control, for control the defrost end temperature, for display
and the fourth can be used for application with virtual probe or for inlet/outlet air
temperature m easurement. Moreover, fifth and sixth probe are used to evaluate and
control the superheat. Finally, the XM668D is equipped with the three digital inputs
(free contact) fully configurable by parameters.
The device is equipped with the HOTKEY connector that perm its to be programmed
in a simple way. The optional direct serial output RS485 (ModBUS compatible)
permits a simple XWEB interfacing. RTC is available as options. The HOT-KEY
connector can be used to connect X-REP display (Depending on the model).
3. INSTALLATION AND MOUNTING
This device can operate without any user interface, but normal application is with
Dixell CX660 keyboard.
be mounted on vertical panel,
in a 29x71 mm hole, and
fixed using the special
bracket supplied as shown in
fig. 1a/1b. The temperature
range allowed for correct
operation is 0 to 60°C. Avoid
places subject to strong
vibrations, corrosive gases,
excessive dirt or humidity.
The same recommendations
apply to probes. Let air
circulate by the cooling holes.
Figure 1a
Figure 1b
4.1 IMPORTANT NOTE
XM device is provided with disconnectable terminal block to connect cables with a
cross section up to 1.6 m m2 for all the low voltage connection: the RS485, the LAN,
the probes, the digital inputs and the keyboard. Other inputs, power supply and relay
connections are provided with screw terminal block or fast-on connection (5.0 mm).
Heat-resistant cables have to be used. Before connecting cables make sure the
power suppl y complies with the instrument’s requirements. Separate the probe
cables from the power supply cables, from the outputs and the power connections.
Do not exceed the maximum current allowed on each relay, in case of heavier loads
use a suitable external relay. N.B. Maximum current allowed for all the loads is 16A.
The probes shall be mounted with the bulb upwards to prevent damages due to
casual liquid infiltration. It is recommended to place the thermostat probe away from
air streams to correctly measure the average room temperature. Place the defrost
termination probe among the evaporator fins in the coldest place, where most ice is
formed, far from heaters or from the warmest place during defrost, to prevent
premature defrost termination.
4.2 XM668D
4.3 VALVE CONNECTIONS AND CONFIGURATION
WARNINGS
1. T o avoid possible problems, before connecting the valve configure the
driver by making the right changes on the parameters. Select the kind of
motor (tEU parameter) and check if the valve is present in tEP
parameter table reported here below.
2. T he max distance between an XM controller and a valve must not
exceed 10 m. To avoid any problems, use only shielded cables with
!!!!! In any case, the unique and valid reference has to be considered the
datasheet made by valve manufacturer. Dixell cannot be considered
responsible in case of valve damaging due to wrong settings!!!!!!
tEP
If you can see your valve on the table, please select the valve through tEP
parameter. In this way, you can be sure of a right configuration. About the
connection, please pay attention to the following table to have a quick reference on
the connection mode for valves of different manufacturer
4 WIRES VALVES (BIPOLAR)
section greater than or equal to 0.325 mm² (AWG22).
Model
250/400
20
Connection
numbering
(steps*10)
(steps*10)
11 381 10
0 159 12
ALCO
EX4/5/6/7/8
(mA*10)
SEI-SEH-
SER
(mA*10)
DANFOSS
ETS
(step/s)
300
200
Figure 1c
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 1/14
Page 2
Connection
45 ORANGE
ORANGE
46
RED RED 47 YELLOW
YELLOW
48
BLACK
BLACK
49 –
Common
GRAY GRAY
Temperature probe:
Pb6
terminals
[19] -
[20] without
5-6 WIRES VALVES (UNIPOLAR)
numbering
AFTER M AKING THE CONNECTION, PLEASE SWITCH OFF AND ON THE
CONTROLLER IN ORDER TO BE SURE OF THE RIGHT POSITIONING OF THE
VALVE.
SPORLAN SAGINOMIYA
4.4 ABSOLUTE MAXIMUM POWER
XM668D is able to dri ve a wide range of stepper valves, on the following table are
indicated the maximum values of current that the actuator can supply to the stepper
wiring. The TF20D dIXEL transformer has to be used.
NOTE: the electrical power absorption of the valve can be unrelated to refrigeration
power that valve has. Before using the actuator, please read the technical manual of
the valve supplied by the manufacturer and check the maximum current used to drive
the valve in order to verify that they are lower than those indicated below.
BIPOLAR VALVES
UNIPOLAR VALVES
TYPE
VALVE
(5-6 wires)
(4 wires)
Maximum Current 0.9A
Maximum Current 0.33A
4.5 KEYBOARD DISPLAY CX660
Polarity:
Terminal [34] [-]
Terminal [35] [+]
Use shielded cable in
The XM668D board can operate also without keyboard.
case of long distance.
4.6 SYNCHRONIZED DEFROST – MAXIMUM 8 SECTIONS
Follow next steps to create a LAN connection, which is a necessary condition to
perform synchronized defrost (also called master-slave functioning):
1) Connect a shielded cable between terminals [38] [-] and [39] [+] for a maximum
of 8 sections;
2) The value of parameter Adr is the number to identif y each electronic board.
Address duplication is not permitted, in this case the synchronized defrost
and the communication with monitoring system is not guaranteed (the Adr is
also the ModBUS address). For example, a correct configuration could be the
following:
If the LAN is well connected, the green LED will be ON. If the green LED blinks
then the connection is wrongly configured.
4.7 SENSORS FOR SUPERHEAT CONTROL
any polarity.
Select the kind of sensor with P6C parameter.
Pressure transducer: Pb5 terminals:
[21] = input of the signal; [22] = Power Supply for
4to20mA transducer; [20] = GND; [23] = +5Vdc power
Select the configuration of the transducer with parameter P5C.
supply for ratiometric pressure transducer.
4.8 HOW TO USE ONLY ONE PRESSURE TRANSDUCER ON MULTIPLEXED
APPLICATIONS
By pressing UP ARROW button, the user will be able to enter a fast selection menu
and to read the value of the following parameters:
dPP = measured pressure (only on master device);
dP5 = value of temperature obtained from pressure temperature conversion;
rPP = pressure value read from remote location (only for slave devices).
Examples of error messages:
dPP = Err the local transducer read a wrong value, the pressure is out of the
bounds of the pressure transducer or the P5C parameter is wrong. Check all
these options and eventually change the transducer;
rPF the remote pressure transducer is on error situation. Check the status of the
onboard GREEN LED: if this LED is OFF the LAN is not working, otherwise
check the remote transducer.
LAST CHECKS ABOUT SU PERHEAT
On the fast access menu:
dPP is the value read by the gauge;
dP6 is the value read by the temperature probe, temperature of the gas on the outlet
section of the evaporator;
SH is the value of the superheat. The n A or Err messages mean that the superheat
has no sense in that moment and its value is not available.
4.9 HOW TO CONNECT MONITORING SYSTEM
1) Terminals [36] [-] and [37] [+].
2) Use shielded twisted cable. For
example Belden® 8762 o 8772 or cat 5
cables.
3) Maximum distance 1Km.
4) Don’t connect the shield to the earth or
to GND terminals of the device, avoid
accidental contacts by using insulating
Only one device for each LAN has to be connected to the RS485 connection.
The value of parameter Adr is the number to identify each electronic board. Address
duplication is not permitted, in this case the synchronized defrost and the
tape.
communication with monitoring system is not guaranteed (the Adr is also the
ModBUS address).
4.10 DIGITAL INPUTS
1) The terminals from [30] to [33] are all
free of voltage;
2) Use shielded cable for distance higher
than one meter;
For each input, has to be configured: the
polarity of activation, the function of the input
and the delay of signaling.
The parameters to perform this configuration are i1P, i1F, i1d respectively for
polarity, functioning and delay. The i1P can be: cL = active when closed; oP = active
when opened. The i1F param eter can be: EAL = external alarm, bAL = serious lock
alarm, PAL = pressure switch alarm, dor = door switch, dEF = external defrost, AUS
= auxiliary activation command, LiG = light activation, OnF = board On/OFF, FHU =
don’t use this configuration, ES = day/night, HdY = don’t use this configuration. Then
there is i1d parameter for delay of activation. For the others digital inputs there are a
set of the same parameters: i2P, i2F, i2d, i3P, i3F, i3d.
4.11 ANALOG OUTPUT
Selectable between 4 to 20mA and
0 to 10Vdc.
Use CABCJ15 to perform the
It’s located near the terminal [39] on a 2-pin connector. It’s possible to use the output
to control anti-sweat heaters through a chopped phase controller XRPW500
(500watt) or family XV...D or XV...K.
connections
A working LAN connection is required (green LED lit on all XM668D boards of the
same LAN). Connect and configure a pressure transducer only on one XM668D of
the network. Afterwards, the value of pressure read by the unique transducer
connected will be available to each device connected to the same LAN.
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 2/14
Page 3
DURING PROGRAMMING
: blink the measurement units of temperatu
re and
LIGHT relay
AUX relay
Manual defrost
ON/OFF
Press for 3
sec the
ON/OFF
button (if the function is
E
nergy
Saving
Press for 3
sec the
ON/OFF
button (if the function is
By press and release the
UP arrow
. The
duration
5. USER INTERFACE
5.1 DIRECT COMMAND INTERFACE
5.2 ICONS
With icon ON the
output is active, while
with blinking icon there
is a delay.
MEASUREMENT
UNIT
°C, Bar and (time)
are ON depending on
the selection.
Light →
Defrost →
Energy saving →
Generic alarm →
pressure
Cooling output
↓
AUX ← Auxiliary relay
← Multimaster Enabled
← Clock / time
← Fan
5.3 KEYBOARD COMMANDS
Single commands:
Double commands:
Press light button.
Press down arrow.
Press and hold for 3 sec the defrost button
enabled).
enabled).
Press and hold for about 3 sec to lock (Pon) or unlock (PoF) the
keyboard.
Pressed together to exit from programm ing mode or from menu; on
submenus rtC and EEV this combination allow to come back to
previous level.
Pressed together for 3 sec allow to access to first level of
programming mode.
5.4 HOW TO MODIFY THE SET POINT FOR AIR TEMPERATURE REGULATION
The thermostat set point is the value that will be used to regulate the air temperature.
The regulation output is controlled by the electronic valve or by the relay.
BEGIN
Value
modification
EXIT
or
In a ny case, it is possible to wait for about 10 sec to exit. In order to show the air
temperature set is sufficient to press and release the SET button, the value is
displayed for about 60 sec.
Press SET button for 3 sec, the measurement units
will blink together.
With the arrows it’s possible to change the value
within the LS and US parameters value.
By pressing SET it is possible to confirm the value
that will blink for about 2 sec.
6. HOW TO PROGRAM THE PARAMETERS (PR1 AND PR2)
The device provide 2 programming levels: Pr1 with direct access and Pr2 protected
with a password (intended for experts).
ACCESS
to Pr1
Select item
Show value
Modify
Confirm
and store
or
or
Press and hold for about 3 sec to have access to
the first programming level (Pr1).
Select the parameter or submenu using the arrows.
Press SET button.
Use the arrows to modify the value.
Press SET key: the value will blink for 3 sec, and
then the display will show the next parameter.
EXIT
Instantaneous exit from the programming mode,
otherwise wait for about 10 sec (without press any
button).
6.1 HOW TO HAVE ACCESS TO “PR2”
To enter Pr2 programming menu:
1. access the Pr1 menu by pressing both SET+DOWN keys for 3 sec, the first
parameter label will be showed;
2. press DOWN key untill the Pr2 label will be showed, then press SET key;
3. The blinking PAS label will be showed, wait some seconds;
4. Will be showed “0 - -” with blinking 0: insert the password [321] using the keys
UP and DOWN and confirming with SET key.
GENERAL STRUCTURE: The first two item rtC and EEV are related to submenus
with others parameters.
SET+UP keys on rtC or EEV submenus allow coming back to parameter list,
SET+UP keys on parameter list allow immediate exit.
6.2 HOW TO MOVE PARAMETER FROM PR1 TO PR2 AND VICE VERSA
Enter on Pr2; select the parameter; press both SET+DOWN keys; a left side LED ON
gives to the parameter the presence on Pr1 level, a left side LED OFF means that the
parameter is not present on Pr1 (only Pr2).
7. FAST ACCESS MENU
This menu contains the list of probes and some values that are automatically
evacuate by the board such as the superheat and the percentage of valve opening.
The values: nP or noP sta nds for probe not present or value not evacuate, Err value
out of range, probe damaged not connected or incorrectly configured.
Entering fast
access menu
of the menu in case of inactivity is about 3 min.
The values that will be showed depend on the
configuration of the board.
HM Access to clock menu or reset of the RTC alarm;
Use
arrows to
select an
entry,
then press
to see the
value or to
go on with
other value.
An Value of analog output;
SH Value of superheat. nA = not Available;
oPP Percentage of valve opening.
dP1 (Pb1) Value read by probe 1.
dP2 (Pb2) Value read by probe 2.
or
dP3 (Pb3) Value read by probe 3.
dP4 (Pb4) Value read by probe 4.
dP5 (Pb5) Temperature read by probe 5 or value obtained from
pressure transducer.
dP6 (Pb6) Value read by probe 6.
dPP Pressure value read by (Pb5) transducer.
rPP Virtual pressure probe, only on slave.
L°t Minimum room temperature;
H°t Maximum room temperature;
dPr Virtual probe for room temperature regulation [rPA and rPb];
dPd Virtual probe for defrost management [dPA and dPb];
dPF Virtual probe for fan management [FPA and FPb];
rSE Real thermoregulation set point: the value includes the sum of
SET, HES and/or the dynamic set point if the functions are
enabled.
Exit
Pressed together or wait the timeout of about 60
sec
8. MENU FOR MULTIMASTER FUNCTION: SEC
The function “section” SEC is enabled when icon is lit. It allows entering in the
remote programming mode, from a keyboard not ph ysically connected to the board,
through the LAN functionality.
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 3/14
Page 4
Enter
Press
SET
and UP
together
or
wait about 10
XM6
x8D_1
XM6x8D_2
+
with
XM6x8D_3+
LSt
uSt
CPP
CHd
0
Manual
settings
Par Par Par Par Par 1 Alco EX4
-
EX5-EX6 5 75 50 10 500 2 Alco EX7
10
160 75 25
500 3 Alco EX8 500 step/s
10
260 80 50
500 4 Danfoss ETS
-
25/50 7 262 10 10
300 5 Danfoss ETS
-
100 10 353 10 10 300
6 Danfoss ETS
-
10
7 Sporlan
SEI .5 to 11 0
159 16 5 200
8 Sporlan SER 1.5
to
5
9 Sporlan SEI 30
0
319 16 5
200 10 Sporlan SER(I) G,J,K
0
250 12 5 200 11 Sporlan SEI
-50 0
638 16 5 200 12 Sporlan SEH(I)
-
100 0 638 16 5 200 13 Sporlan SEH(I)
-
175 0 638 16 5 200
Action
Enter
menu
Waiting
for action
section
list
Select
proper
function
Confirm
Exit menu
Button or
display
SEC
LOC
ALL
Or
SE1
SEn
SE8
Notes
Press UP arrow for about 3 sec, the icon will be
ON.
The menu to change the section will be entered. SEC
label will be displayed.
Press SET to confirm. The following list will be
available to select the proper network function.
To gain access only to the local device.
To gain access to all the devices connected to the
LAN.
To gain access to the device with 1st Adr (*)
…
To gain access to the device with 8th Adr (*)
Select and confirm an entry by pressing SET button.
seconds.
(*) The devices on the LAN are indexed by using the Adr parameter (in ascending
order).
EXAMPLES:
1. T o modify the same parameter values in all the devices connected to the LAN:
enter multim aster menu. Select and confirm ALL. Exit from multimaster menu.
Enter the programming menu and change the required parameter values.
The new values will be changed on all devices connected to the LAN.
2. T o modify a parameter value in the device with [Adr = 35]: find the relevant
indexed section (the one linked to [Adr = 35]). Enter multimaster menu. Select
and confirm this section from the multimaster menu. Exit from multimaster
menu. Enter the programming menu and change the required parameter value.
3. If the alarm nod is present: enter the multimaster menu. Select and confirm the
LOC section. Exit from multimaster menu.
AT THE END OF THE PROGRAMMING PROCEDURE, SELECT THE
SECTION “LOC”. IN THIS WAY THE ICON WILL BE SWITCHED OFF!!
9. COMMISSIONING
9.1 CLOCK SETTING AND RTC ALARM RESET
Parameter configuration: [CbP = Y] en able the clock, [EdF = rtC] enable the defrost
from rtc Ld1...Ld6.
BEGIN
Display
HM identify the clock RTC submenu; press
HUr = hour press to confirm/modify
Display
Min = minutes press to confirm/modify
…… don’t use others parameters if present.
EXIT
Note: the rtC clock menu is present also on the second level of parameters.
Warning: if the board shows the rtF alarm, the device has to be changed.
9.2 ELECTRONIC VALVE SETTINGS
Some parameters have to be checked:
[1] Superheat temperature probe: Ntc, Ptc, Pt1000 with parameter P6C. The
sensor has to be fixed at the end of the e vaporator.
[2] Pressure transducer: [4 to 20mA] or ratiometric P5C = 420 or 5Vr with
parameter P5C.
[3] Range of measurement: check the parameter of conversion PA4 and P20 that
are related to the transducer.
TRANSDUCER: [-0.5/7Bar] or [0.5/8Bar abs] the correct setup is relative pressure
with PA4 = -0.5 and P20 = 7.0. The [0.5/12Bar abs] the correct setup is relative
pressure with PA4 = -0.5 and P20 = 11.00.
Example of virtual pressure with unique [4 to 20mA] or [0 to 5V] transducer:
Param.
Adr
LPP
P5C
PA4
P20
[4] From EEV submenu: select the correct kind of gas with FTY parameter.
[5] Use the following parameters to setup the right valve driving, according to the
valve datasheet from the manufacturer.
without transducer
LPP = n LPP = Y LPP = n
LAN or not connect
the probe
Not used -0.5 bar Not used
Not used 7.0 bar Not used
UP arrow (press once) to access the fast access
Press for about 10 sec. The operation resets the RTC
alarm.
transducer
menu
without transducer
n n + 1 n + 2
P5C= 420 or 0-5V
LAN or not connect
the probe
tEU Type of Stepper motor: [uP-bP] it permits to select the kind of valve. uP = 5 -
6 wires unipolar valves; bP = 4 wires bipolar valves; !!!!! WARNING !!!!! by
changing this parameter the valve has to be reinitialized.
tEP Predefined valve selection: [0 to 10] if [tEP = 0] the user has to modify all
the parameters of configuration in order to use the valve. If tEP is different
from 0 the device performs a fast configuration of the following parameters:
LSt, uSt, Sr, CPP, CHd. To select the right number please read the following
table:
tEP
If tEP is different from 0 previous configuration of LSt, uSt, Sr, C PP and CHd are
Model
250/400
20
overwritten.
(steps*10)
(steps*10)
11 381 10
0 159 12
(mA*10)
(mA*10)
Sr (step/s)
300
200
LSt Minimum number of steps: [0 to USt] it permits to select the minimum
number of steps. At this number of steps the valve should be closed. So it’s
necessary the reading of manufacturer datasheet to set correctl y this
parameter. It’s the minimum number of steps to stay in advised range of
functioning. !!!!! WARNING !!!!! By changing this parameter the valve has
to be reinitialized. The device performs this procedure automatically and
restarts its normal functioning when the programming mode ends.
USt Maximum number of steps: [LSt to 800*10] it permits to select the maximum
number of steps. At this number of steps the valve should be completely
opened. Read the datasheet provided by manufacturer of the valve to set
correctly this parameter. It’s the maximum number of steps to stay in advised
range of functioning. !!!!! WARNING !!!!! By changing this parameter the
valve has to be reinitialized. The device performs this procedure
automatically and restarts its normal functioning when the programming
mode ends.
Sr Step rate [10 to 600 step/sec] it’s the maximum speed to change step without
losing precision (means without losing steps). It’s advised to stay under the
maximum speed.
CPP Current per phase (only bipolar valves): [0 to 100*10mA] it’s the maximum
current per phase used to drive val ve. It’s used only with bipolar valves.
CHd Holding current per phase (only bipolar valves): [0 to 100*10mA] it’s the
current per phase when the valve is stopped for more than 4 minutes. It’s used
only with bipolar valves.
9.3 ELECTRONIC VALVE FUNCTIONING
ON/OFF TEMPERATURE REGULATION [CrE = n]
1. The HY parameter is a differential [2°C default].
2. The temperature regulation is ON/OFF with valve stop at set point.
3. The superheat is regulated to be closer to its set point.
4. With more pauses normally also the humidity is bigger.
5. Regulation pauses can be realized using Sti and Std parameters (during these
pauses the valve is closed).
COUNTINUOUS REGULATION OF THE TEMPERATURE [CrE=Y] (with superheat
regulation):
1. The HY parameter becomes temperature band for PI control. A default good
value is 5°C.
2. The regulation of injection is continuous and the cooling output is always on.
The icon is always ON excluding the defrost phase.
3. The superheat is regulated following the SSH parameter.
4. Regulation pauses can be realized using Sti and Std parameters (during these
pauses the valve is closed).
5. Increasing the Int integral time it is possible to decrease the speed of reaction
of the regulator on the HY band.
COUNTINUOUS REGULATION OF THE TEMPERATURE [CrE=Y] (without
superheat regulation):
1. The HY parameters become temperature band for PI control. A default good
value is 5°C.
2. The regulation of injection is continuous and the cooling output is always on.
The icon is always ON excluding the defrost phase.
3. The superheat is not regulated because the valve is at the end of the
evaporator. At the beginning of the evaporator there is another valve.
4. Regulation pauses can be realized using Sti and Std parameters (during these
pauses the valve is closed).
5. Increasing the Int integral time it is possible to decrease the speed of reaction
of the regulator on the HY band.
9.4 SYNCHRONIZED DEFROST
The synchronized defrost allow to manage multiple defrost from different boards
connected through the LAN connection. In this way, the boards can perform
simultaneous defrosts with the possibility to end them in a synchronized way.
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 4/14
Page 5
Par. Unit A (RTC)
Unit
B (RTC)
Unit C
(RTC) Adr
EdF
CbP
IdF
MdF
dtE
Ld1
Ld2
Ld3
Display
Causes
Notes
KEYBOARD
enter
ALARM FROM PROBE INPUT
P1
TEMPERATURE ALARM
Temperature alarm from parameter
Temperature alarm from parameter
Alarm from parameter
dLU
on
Alarm from parameter
dLU
on
Alarm from parameter
FLU
on
Alarm from parameter
FLL
on
DIGITAL INPUT ALARM
Door open alarm from input
i1F
,
Cooling relay and fan follow the
Pressure switch lock
i1F, i2F
o
i3F
ELECTRONIC VALVE ALARM
High superheating from
HSH
CL
OCK ALARM
OTHERS
23 EE
The Adr parameter cannot be duplicated because in this case the defrost
cannot be correctly managed.
BEGIN
Find Adr
Modify
Adr
EXIT
The LSn and LAn parameter are only to show the actual settings (read only). Se the
following example of configuration:
DAILY DEFROST FROM RTC: [CbP = Y] and [EdF = rtC]
idF Parameter: for safety reason force the value of idF at +1 respect to the i nterval
between two Ld parameters. The idF timer is reinitialized after defrost and at every
power-on.
DEFROST START: at the time selected by the parameters Ld1 to Ld6 or Sd1 to
Sd6.
DEFROST END: if the probes reach the dtE temperature or for maximum MdF time.
SAFETY and rtC or rtF ALARM: with clock alarm the device will use the parameter
idF, dtE and MdF.
WARNING: don’t set [EdF=rtC] and [CPb=n].
MULTIMASTER DEFROST: all the probes with clock
Table for example
or
n N + 1 N + 2
rtC (clock) rtC (clock) rtC (clock)
Y Y Y
9 hours safety 9 hours safety 9 hours safety
45 min safety 45 min safety 45 min safety
12°C safety 12°C safety 12°C safety
06:00 1° 06:00 1° 06:00 1°
14:00 2° 14:00 2° 14:00 2°
22:00 3° 22:00 3° 22:00 3°
Press for 3 sec, the rtC or other will be showed.
The measurement unit blinks.
Press more than once the DOWN arrow to find the
Adr parameter, the press SET.
Set the value of Adr parameter, then press SET to
confirm the parameter.
Press the two keys together to exit from menu or
wait for about 10 sec.
10. DISPLAY MESSAGES
1 nod
2 Pon
3 PoF
4 rSt
noP, nP
5
nA
P2
P3
P4
6
P5
P6
PPF
CPF
7 HA
8 LA
9 H Ad
10 LAd
11 HAF
No display: the keyboard is trying
to work with another board that is
not working or not present
Keyboard is unlocked
Keyboard is locked
Alarm reset Alarm output deactivated
Not present (configuration)
Not available (evaluation)
Sensor brake down, value out of
range or sensor incorrectly
configured P1C, P2C to P6C.
PPF can be showed by slaves of
pressure that don’t receive the
value of pressure.
CPF is showed when the remote
probe 4 is not working.
ALU on probe rAL.
ALL on probe rAL.
probe defrost probe [dPa / dPb].
probe defrost probe [dPa / dPb].
probe defrost probe [FPa / FPb].
Press for 3 sec UP arrow,
the SEC menu and select LOC
entry.
P1: the cooling output works
with Con and COF,
With defrost probe on error the
defrost is performed only at
interval.
For P5, P6 and PPF: the
percentage of the valve
opening is fixed at PEO value.
12 LAF
13 dA
14 EA
15 CA
16 PAL
17 LOP
18 MOP
19 LSH
20 HSH
21 rtC
22 rtF
24 Err
25 End
probe defrost probe [FPa / FPb].
i2F or i3F = after delay d1d, d2d
or d3d.
Generic alarm from digital input
i1F,i2F,i3F=EAL.
Severe alarm of regulation lock
from digital input i1F,i2F,i3F=bAL.
= PAL.
Minimum operating pressure
threshold from LOP parameter.
Maximum operating pressure
threshold from MOP parameter.
Low superheating from LSH
parameter and SHd delay.
parameter and SHd delay.
Clock settings lost.
Clock damaged.
EEPROM serious problem. Output OFF.
Error with upload/download
parameters.
Parameters have been correctly
transferred.
odc parameter. Cooling restart
as specified on rrd parameter.
Regulation output OFF.
All the outputs are OFF.
The valve output increases its
opening of dML quantity every
second.
The valve output decreases its
opening of dML quantity every
second.
The valve will be closed; the
alarm will be showed after SHd
delay.
Only display.
Defrost will be performed with
IdF till restoring the settings of
RTC.
Defrost will be performed with
IdF.
Repeat the operation.
10.1 ALLARM RECOVERY
Probe alarms P1, P2, P3 and P4 start some seconds after the fault in the related
probe; they automatically stop some seconds after the probe restarts normal
operation. Check connections before replacing the probe.
Temperature alarms HA, LA, HA2 and L A2 automatically stop as soon as the
temperature returns to normal values.
Alarms EA and CA (with i1F = bAL) recover as soon as the digital input is disabled.
Alarm CA (with i1F = PAL) recovers only by switching off and on the instrument.
11. USE OF THE PROGRAMMING “HOT KEY“
The XM units can UPLOAD or DOWNLOAD the parameter list from its own E2
internal memory to the HOT-KEY and vice-versa through a TTL connector. Using
HOT-KEY the Adr will not changed.
11.1 DOWNLOAD (FROM THE HOT-KEY TO THE INSTRUMENT)
1. Turn OFF the instrument by means of the ON/OFF key, insert the HOT-KEY
and then turn the unit ON.
2. Automatically the parameter list of the HOT-KEY is downloaded into the
controller memory: the doL message is blinking. After 10 seconds the
instrument will restart working with the new parameters. At the end of the data
transfer phase the instrument displays the following messages: End for right
programming. The instrument starts regularly with the new programming. Err
for failed programming. In this case turn the unit off and then on if you want to
restart the download again or remove the HOT-KEY to abort the operation.
11.2 UPLOAD (FROM THE INSTRUMENT TO THE “HOT KEY”)
1. When the XM unit is ON, insert the HOT-KEY and push è key; the uPL
message appears.
2. The UPLOAD begins; the uPL message is blinking.
3. Remove the HOT-KEY. At the end of the data transfer phase the instrument
displays the following messages:
End = right programming;
Err = failed programming. In this case push SET key if you want to restart the
programming again or remove the not programmed HOT-KEY.
12. CONTROLLING LOADS
12.1 THE COOLING OUTPUT
The regulation is performed according to the t emperature measured by the
thermostat probe that can be physical probe or virtual probe obtained by a weighted
average between two probes following the formula:
If the temperature increases and reaches set point plus differential the solenoid valve
is opened and then it is closed when the temperature reaches the set point value
again.In case of fault in the thermostat probe the opening and closing time of
solenoid valve is configured by Con and CoF parameters.
12.2 STANDARD REGULATION AND CONTINUOUS REGULATION
The regulation can be performed in three ways: the goal of the first way (standard
regulation) is reaching the best superheat via a classic temperature regulation
obtained using hysteresis. The second way permits to use the valve to realize an high
performance temperature regulation with a good f actor of superheat precision. This
value_for_room_regulation = (rPA*rPE + rPb*(100-rPE))/100
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 5/14
Page 6
XM6x8D_1
XM6x8D_2 +
with
XM6x8D_3
+
XM6x8D
second possibility, it can be used only in centralized plants and it is available
only with electronic expansion valve by selecting [CrE=Y] parameter. The third
kind of regulation has been thought to be used with vales called evaporator valves
[CrE=EUP], in this configuration the valve is placed at the end of the evaporator. In
any case, the regulation is performed via PI regulator that gives the opening
percentage to the valve.
Standard regulation: [CrE=n]
In this case, the HY parameter is the differential for standard ON/OFF regulation. In
this case the int parameter is neglected.
Continuous regulation: [CrE=Y]
In this case, the HY parameter is the proportional band of PI in charge of room
temperature regulation and we advise to used at least [HY = 5.0°C/10°F]. The int
parameter is the integral time of the same PI regulator. Increasing int parameter the
PI regulator become slowly in reaction and of course is true vice versa. To disable the
integral part of regulation you should set [int=0].
Evaporator valves: [CrE=EUP]
In this case, the system performs a regulation of the temperature without thinking
about the superheat (in fact the valve is at the end of the evaporator). The HY
parameter is the proportional band for the temperature regulation and int is the
integral time for the regulation. In this situation there is no superheat regulation.
12.3 DEFROST
Defrost starting
In any case, the device check the temperature read by configured defrost probe
before starting defrost procedure, after that:
- (If RTC is present)Two defrost modes are available through the tdF parameter:
defrost with electrical heater and hot gas defrost. The defrost inter val is controlled
by parameter EdF: (EdF=rtC) defrost is made in real time depending on the hours
set in the parameters Ld1 to Ld6 in workda ys and in Sd1 to Sd6 on holida ys;
(EdF=in) the defrost is made every idF time.
- Defrost cycle starting can be operated locally (manual activation by means of the
keyboard or digital input or end of interval time) or the command can come from
the Master defrost unit of the LAN. In this case the controller will operate the
defrost cycle following the parameters it has programmed but, at the end of the drip
time, will wait that all the other controllers of the LAN finish their defrost cycle
before to re-start the normal regulation of the temperature according to dEM
parameter.
- Every time any of the controller of the LAN begin a defrost cycle it issue the
command into the network making all the other controllers start their own cycle.
This allows a perfect s ynchronization of the defrost in the whole multiplexed
cabinet according to LMd parameter.
- Differential defrost: Selecting dPA and dPb probes and by changing the dtP and
ddP parameters the defrost can be started when the difference between dPA and
dPb probes is lower than dtP for all ddP time. This is useful to start defrost when a
low thermal exchange is detected. If [ddP=0] this function is disabled.
-
Defrost ending
- When defrost is started via rtC, the maximum duration of defrost is obtained from
Md parameter and the defrost end temperature is obtained from dtE parameter
(and dtS if two defrost probes are selected).
- If dPA and dPb are present and [d2P=Y], the instrum ent stops the defrost
procedure when dPA is higher than dtE temperature and dPb is higher than dtS
temperature.
At the end of defrost the drip time is controlled through the Fdt parameter.
12.4 FANS
CONTROL WITH RELAY
The fan control mode is selected by means of the FnC parameter:
C-n = running with the solenoid valve, OFF during the defrost;
C-Y = running with th1e solenoid valve, ON during the defrost;
O-n = continuous mode, OFF during the defrost;
O-Y = continuous mode, ON during the defrost.
An additional parameter FSt provides the setting of temperature, detected by the
evaporator probe, above which the fans are always OFF. This can be used to m ake
sure circulation of air only if his temperature is lower than set in FSt.
CONTROL WITH ANALOG OUTPUT (if present)
The modulating output [trA=rEG] works in proportional way (e xcluding the first AMt
seconds where the fans speed is the maximum. 10seconds is the minimum value).
The regulation set point is relative to regulation set point and is indicated by ASr, the
proportional band is always located above [SET+ASr] value and its value is PbA.
The fans are at minimum speed AMi when the temperature read by fan probe is
[SET+ASr] and the fan is at maximum speed (AMA) when the tempera ture is
[SET+ASr+PbA].
12.5 ANTI SWEAT HEATERS
The anti-sweat heater regulation can be performed with on board relay (if oA6=AC)
or with the analog output (if present by setting trA=AC). However the regulation can
be performed in two ways:
W ithout real dew-point information: in this case the default value for dew-
point is used (SdP parameter).
Receiving dew-point from XWEB5000 s ystem: the SdP parameter is
overwritten when valid value for dew-point is received from XWEB. In
The best performance can be obtained using probe 4. In this case, the regulation
follows the chart:
Probe 4 should be placed on the showcase glass. For each cabinet can be used
only one probe 4 (P4) sending its value t o the others section that are conne cted to
the LAN.
HOW TO WORK WITH PROBE 4 THROUGH THE LAN:
HOW TO WORK WITHOUT PROBE 4:
In case of P4 error or if P4 is absent the output is at AMA value for the AMt time then
the output is at 0 value for the time [255–AMt] time performing a simple PWM
modulation.
case of XWEB link is lost, SdP is the value that will be used for safety.
Param.
Adr
LCP
P4C
trA
oA6
Param.
P4C
AMt
Without probe 4
probe 4
n n + 1 n + 2
LCP = n LCP = Y LCP = n
LAN or not
connect the probe
P4C = NTC, PtC or
PtM
trA = AC if the device has the analog output
oA6 = AC if the device will use the AUX relay for regulation
Without probe 4
nP
% of ON
In this case, the regulation is perform ed by
switching on and off the auxiliary rela y on a
60 minutes time base. The ON time will be
the AMt value, so that the relay will be ON for
AMt minutes and OFF for [60-AMt] minutes.
Without probe 4
LAN or not connect
the probe
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 6/14
Page 7
12.6 AUXILIARY OUTPUT
The auxiliary output is switch ON and OFF by means of the corresponding digital
input or by pressing and releasing the down arrow key.
13. TECHNICAL DATA
CX660 keyboard
Housing: self extinguishing ABS
Case: CX660 fascia 35x77 mm; depth 18mm
Mounting: panel mounting in a 29x71 mm panel cut-out
Protection: IP20
Frontal protection: IP65
Power supply: from XM600 power module
Display: 3 digits, red LED, 14.2 mm high
Optional output: buzzer
Power modules
Case: 8 DIN
Connections: Screw terminal block 1.6 mm2 heat-resistant wiring and 5.0m m fast-
on or screw terminals.
Power supply: 24Vac
Power absorption: 20VA max
Inputs: up to 6 NTC; PTC; Pt1000 probes
Digital inputs: 3 free of voltage
Relay outputs: Total current on lo ads MAX. 16A
Solenoid Valve: relay SPST 5A, 250Vac
Defrost: relay SPST 16A, 250Vac
Fan: relay SPST 8A, 250Vac
Light: relay SPST 16A, 250Vac
Alarm: SPDT relay 8A, 250Vac
Aux: SPST relay 8A, 250Vac
Outputs for valve: bipolar or unipolar valves
Optional output (AnOUT) DEPENDING ON THE MODELS:
PWM / Open Coll ector outputs: PW M or 12Vdc max 40mA
Analog output: 4 to 20mA or 0 to 10V
Serial output: RS485 with ModBUS - RTU and LAN
Data storing: on the non-volatile memory (EEPROM)
Kind of action: 1B
Pollution degree: normal
Software class: A
Operating temperature: 0 to 60°C (32 to 140°F)
Storage temperature: -25 to 60°C (-13 to 140°F)
Relative humidity: 20 to 85% (no condensing)
Measuring and regulation range:
NTC probe: -40 to 110°C (-58 to 230°F)
PTC probe: -50 to 150°C (-67 to 302°F)
Pt1000 probe: -100 to 100°C (-148 to 212°F)
Resolution: 0.1°C or 1°C or 1°F (selectable)
Accuracy (ambient temp. 25°C): ±0.5°C ±1 digit
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 7/14
Page 8
CLOCK AND DEFROST
By pressing SET it’s
The valve changes its opening on the band
[SSH, SSH
DEFAULT PARAMETER MAP
The numbers of the first column are simple indexes that are unrelated to the position on the device menu. The total amount of parameters can be different depending on the
applications. SUBMENUS: the parameters O1...O24 of the clock belongs to rtC label; V1...V30 ELECTRONIC VALVE belongs to EEV.
LABEL VALUE DESCRIPTION RANGE NOTES
rtC
CbP Y
Hur - - -
Min - - -
dAY - - -
Hd1 nU
Hd2 nU
Hd3 nU
iLE 0.0
dLE 0.0
iSE 0.0
dSE 0.0
HES 0.0
Ld1 6.0
Ld2 13.0
Ld3 21.0
Ld4 nU
Ld5 nU
Ld6 nU
Sd1 6.0
Sd2 13.0
Sd3 21.0
Sd4 nU
Sd5 nU
Sd6 nU
EEU
FtY 404
SSH 8.0
Pb 6.0
possible to enter on RTC submenu
Clock Presence n; Y -
Hours. - - - -
Minutes. - - - -
Day of the week. Sun(0); SAt(6) -
First weekly day. Sun(0); SAt(6); nu(7)
Second weekly day. Sun(0); SAt(6); nu(7)
Third weekly day. Sun(0); SAt(6); nu(7)
Energy saving cycle start during workdays. 0.0 to 23h50min (143)
Energy saving cycle length during workdays. 0.0 to 24h00min (144)
Energy saving cycle start during holidays. 0.0 to 23h50min (143)
Energy saving cycle length during holidays. 0.0 to 24h00min (144)
Temperature increasing during Energy Saving cycle
(Day/Night).
Workdays First defrost start.
Workdays Second defrost start.
Workdays Third defrost start.
Workdays Fourth defrost start.
Workdays Fifth defrost start.
Workdays Sixth defrost start.
Holidays First defrost start.
Holidays Second defrost start.
Holidays Third defrost start.
Holidays Fourth defrost start.
Holidays Fifth defrost start.
Holidays Sixth defrost start.
[-30.0°C to 30.0°C]
[-54°F to 54°F]
0.0 to 23h50min (143)
nU (144)
Ld1 to 23h50min (143)
nU (144)
Ld2 to 23h50min (143)
nU (144)
Ld3 to 23h50min (143)
nU (144)
Ld4 to 23h50min (143)
nU (144)
Ld5 to 23h50min (143)
nU (144)
0.0 to 23h50min (143)
nU (144)
Sd1 to 23h50min (143)
nU (144)
Sd2 to 23h50min (143)
nU (144)
Sd3 to 23h50min (143)
nU (144)
Sd4 to 23h50min (143)
nU (144)
Sd5 to 23h50min (143)
nU (144)
ELECTRONIC VALVE
Kind of gas.
Superheat set point.
Proportional band.
R22(0); 134(1); 404(2); 407(3);
410(4); 507(5); CO2(6)
[0.1°C to 25.5°C]
[1°F to 45°F]
[0.1°C to 60.0°C]
[1°F to 108°F]
Access to CLOCK submenu (if present)
Set the first day of the week which follows the holiday
times.
Set the second day of the week which follows the
holiday times.
Set the third day of the week which follows the holiday
times.
During the Energy Saving cycle the set point is
increased by the value in HES so that the operation set
point is [SET + HES].
Format: hours.10min, resolution: 10min.
Set the duration of the Energy Saving cycle on
workdays.
Format: hours.10min, resolution: 10min.
Format: hours.10min, resolution: 10min.
Format: hours.10min, resolution: 10min.
Set the increasing value of the set-point during the
Energy Saving cycle.
Workdays defrost start: [Ldn to 23h50min] these
parameters set the beginning of the eight
programmable defrost cycles during workdays. Ex:
when [Ld2 = 12.4] the second defrost starts at 12.40
during workdays.
nU = not used.
Format: hours.10min, resolution: 10min.
Holidays defrost start: [Sdn to 23h50min] these
parameters set the beginning of the eight
programmable defrost cycles on holidays. Ex: when
[Sd2 = 3.4] the second defrost starts at 3.40 on
holidays.
nU = not used.
Format: hours.10min, resolution: 10min.
By pressing SET you can enter electronic expansion
valve submenu.
Type of gas used by plant. Fundamental parameter
for correct functioning of all system.
This is the value used to regulate superheat.
+ Pb]. At SSH value of superheat the valve will be at
0% (without integral contribution) and at [SSH + Pb]
value of superheat the valve will be at MnF. For values
bigger than [ SSH + Pb] the valve is completely
opened.
inC 120
PEO 50
OPE 85 Start opening percentage for the time SFd.
SFd 1.3 Duration of soft start phase with opening at OPE.
OPd 100
Pdd 1.3
MnF 100
Fot nU
Integration time for superheat regulation. 0 to 255s -
Valve opening in case of error on probes P5 or P6. 0 to 100%
0 to 100%
0.0 to 42min00sec (252)
Post defrost opening percentage for all the time
PddB.
0 to 100%
Duration of post defrost phase. 0.0 to 42min00sec (252)
Maximum percentage of opening admitted (during
normal functioning).
Manual opening.
0 to 100%
0 to 100%
nU
If a temporary probe error occurs, valve opening
percentage is PEo until PEd time is elapsed.
Opening valve percentage when start function is active.
This phase duration is SFd time.
Set start function duration and post-defrost duration.
During this phase the alarms are neglected.
Format: min.10sec, resolution: 10 sec.
Opening valve percentage when after defrost function
is active. This phase duration is Pdd time.
Set start function duration and post-defrost duration.
During this phase the alarms are neglected.
Format: min.10sec, resolution: 10 sec.
During regulation it sets the maximum valve opening
percentage.
It permits to force the valve opening to the specified
value. This value overwrites the one calculated by PID
algorithm.
!!!! WARNING !!!!
It must be [Fot = nU] to have correct superheat
regulation.
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 8/14
Page 9
EXPERT:
when suction pressure goes down
the lower
Until
MOP
alarm is active, the valve will
close
, every
If superheat value exceeds
MSH
value, the display will
If the superheat value
is lower than
LSH
during the
Hysteresis for superheat alarm
recovery
[MSH –
If a superheat alarm occurs, the delay time
SHd
will
P
ermits to
increase integral time when
SH
value is
uP
= unipolar
valve (5-
6 wires);
If
[
CrE = n
]
then HY
is
the
hysteresis for ON/OFF
This value is used
only when
[
CrE = Y
]
or
[
CrE =
With
[
CrE = Y
]
or
[
CrE = EUP]
the regulation become
PA4 -0.5
P20 11.0
Probe value at 4mA or at 0V.
Probe value at 20mA or at 5V.
Meas
Unit
BAR
PSI
dKP
Meas
Unit
BAR
PSI
dKP
Range
[PrU=rE] -1.0 to P20
[PrU=Ab] 0.0 to P20
[PrU=rE] -14 to P20
[PrU=Ab] 0 to P20
[PrU=rE] -10 to P20
[PrU=Ab] 0 to P20
Range
[PrU=rE] PA4 to 50.0
[PrU=Ab] PA4 to 50.0
[PrU=rE] PA4 to 725
[PrU=Ab] PA4 to 725
[PrU=rE] PA4 to 500
[PrU=Ab] PA4 to 500
Value of pressure at 4mA for current probe [4 to 20mA]
or value at 0V for ratiometric probes. The value is
absolute or relative according to PrU parameter.
Value of pressure at 20mA for current probe [4 to
20mA] or value at 5V for ratiometric probes. The value
is absolute or relative according to PrU parameter.
LPL -0.5
MOP 11.0
LOP -0.5
dML 30 Delta [MOP - LOP].
MSH 60.0
LSH 2.0
SHY 0.5
SHd 3.0
FrC 0
tEU bP
tEP nU
LSt 0
USt 0
Sr 10
CPP 0
CHd 0
REGULATION
Lower Pressure Limit for superheat regulation. PA4 to P20
Maximum operating pressure threshold and valve
closing of dML value.
Minimum operating pressure threshold and valve
opening of dML value.
Maximum superheat alarm threshold.
Minimum superheat alarm threshold.
SHY] and [LSH + SHY].
Delay of superheat alarm signaling. 0.0 to 42min00sec (252)
Integration additive constant (Fast-recovery). 0 to 100s
Kind of valve. uP; bP
Predefined valve selection. nU to 10
Minimum number of steps where the valve can be
considered as completely closed.
Maximum number of steps that can be performed. LSt to 800 (* 10) For manual adjusting of the valve.
Step rate: is the speed to change step. A too high
value causes a wrong driving.
Current per phase during bipolar valve driving. 0 to 100 (*10mA) For manual adjusting of the valve.
Current per phase to maintain the actual position
(Holding current).
bound LPL, superheat regulation will use a fixed
pressure value. Otherwise, the normal pressure value
will be used (according to PrU parameter).
If suction pressure exceeds maximum operating
LOP to P20
PA4 to MOP
0 to 100%
[LSH to 80.0°C]
[LSH to 144°F]
[0.0°C to MSH]
[0°F to MSH]
[0.1°C to 25.5°C]
[1°F to 45°F]
pressure value, the instrument will signal this situation
giving the MOP alarm (according to PrU parameter).
If suction pressure exceeds minimum operating
pressure value, the instrument will signal this situation
giving the LOP alarm (according to PrU parameter).
cycle period, of a value equal to the dML percentage.
Until LOP alarm is active, the valve will open, every
cycle period, of a value equal to the dML percentage.
show the MSH message until delay time SHd will
expire.
SHd delay time, then the display will show the
message LSH. As soon as the superheat value is
lower than LSH value, the valve will close
immediately, without waiting the SHd delay time (to
avoid evaporator flooding).
-
have to expire before the controller shows an alarm.
Format: min.10sec, resolution: 10sec.
below the set-point. If [FrC = 0] fast reco very function is
disabled.
bP = bipolar valve (4 wires).
See par. 4.3.
nU = manual setting.
0 to USt (* 10) For manual adjusting of the valve.
10 to 600 (steps/sec) For manual adjusting of the valve.
0 to 100 (*10mA) For manual adjusting of the valve.
HY 5.0
Differential.
[0.1°C to 25.5°C]
[1°F to 45°F]
thermoregulation. If [CrE = Y] or [CrE = EUP] then HY
is the proportional band for temperature PI controller.
On these cases the value should be greater than 5°C.
int 150
Integral time for room temperature regulation. 0 to 255s
EUP]. It’s the integral time for thermoregulation: high
values mean slower regulation.
0 (zero) = no integral action.
PI, HY become a band and int an integral time.
CrE Y
LS -30.0
US 20.0
Continuous regulation activation. n(0); Y(1); EUP(2)
Minimum set point.
Maximum set point.
[-55.0°C to SET]
[-67°F to SET]
[SET to 150.0°C]
[SET to 302°F]
n = standard regulation;
Y = continuous regulation, to be used only in
centralized plants;
EUP = evaporator valves (see par. 12.2).
Set the minimum acceptable value for the set-point.
Set the maximum acceptable value for the set-point.
This function is enabled at the initial start up of the
odS 0
Outputs activation delay at start up. 0 to 255min
instrument and inhibits any output activation for the
period of time set in this parameter (N.B.: AUX and
Light can work).
AC 0
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 9/14
Anti-short cycle delay. 0 to 60min
Interval between the solenoid valve stop and the
following restart.
Page 10
Compressor ON time during continuous cycle:
Set point for continuous cycle:
used value during the
Solenoid valve ON time with faulty probe:
time
Solenoid valve OFF time with faulty probe:
time
°C
=
Celsius
;
It selects the pressure measurement units.
MPA
means
First probe used
to regulate room temperature. If
[rPA
It defines the percentage of the
rPA
respect to
rPb
.
First probe used for defrost. If
[rPA = nP]
the regulation
Second probe used for defrost. If
[rPB = nP]
the
It defines
the percentage of the
dPA
respect to
dPb
.
EL
= defrost with electrical heater;
rtC =
defrost activation via RTC with
Ld1, Ld2
...
n
=
only the
dPA
probe is used to defrost
CCt 0.0
CCS 0.0
Con 15
CoF 30
CF °C
PrU rE
PMU bAr
rES dE
Lod tEr
rEd tEr
dLY 0
rPA P1
rPb nP
rPE 100
DEFROST
dPA P2
dPb nP
dPE 100
tdF EL
EdF in
dtP 0.1
ddP 60 Delay before activation of differential defrost (dtP).
Continuous cycle duration. 0.0 to 24h00min (144)
Continuous cycle set point.
Compressor ON time with faulty probe. 0 to 255min
Compressor OFF time with faulty probe. 0 to 255min
Temperature measurement unit. °C(0); °F(1)
Pressure Mode. rE(0); Ab(1)
Pressure measurement unit. bAr(0); PSI(1); MPA(2)
Resolution (only °C). dE; in
Local display: default display.
Remote display: default display.
Display delay. 0.0 to 24h00min (144)
Regulation probe A.
Regulation probe B.
Virtual probe percentage (room temperature). 0 to 100%
Defrost probe A.
Defrost probe B.
Virtual probe percentage (defrost temperature). 0 to 100%
Defrost kind. EL; in
Defrost mode. rtC; in
Difference between two probes to activate the
defrost.
allows to set the length of the continuous cycle:
compressor stays on without interruption for the CCt
time. It can be used, for instance, when the room is
filled with new products.
Format: hours.10min, resolution: 10min.
[-55.0°C to 150.0°C]
[-67°F to 302°F]
continuous cycle.
during which the solenoid valve is active in case of
faulty thermostat probe. With COn = 0 solenoid valve is
always OFF.
during which the solenoid valve is off in case of faulty
thermostat probe. With COF = 0 solenoid valve is
always active.
°F = Fahrenheit.
!!! WARNING !!!
When the measurement unit changes, all parameters
with temperature values will have to be checked.
It defines the mode to evaluate the pressure values.
!!! WARNING !!!
PrU value is used for all the pressure parameters. If
[PrU = rE] all pressure parameters are in relative
pressure unit, if [PrU = Ab] all pressure parameters are
in absolute pressure unit.
the value of pressure measured by kPA*10.
It sets decimal point display.
in = 1°C;
dE = 0.1 °C.
It selects which probe is displayed by the instrument.
nP(0); P1(1); P2(2);
P3(3); P4(4); P5(5);
P6(6); tEr(7); dEF(8)
nP(0); P1(1); P2(2);
P3(3); P4(4); P5(5);
P6(6); tEr(7); dEF(8)
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
nP = no probe;
P1, P2, P3, P4, P5, P6, tEr = virtual probe for
thermostat;
dEF = virtual probe for defrost.
It selects which probe is displayed by the X-REP.
nP = no probe;
P1, P2, P3, P4, P5, P6, tEr = virtual probe for
thermostat;
dEF = virtual probe for defrost.
When the temperature changes, the display will be
updated of 1°C / 1°F when delay time expires.
Format: min.10sec, resolution: 10sec.
= nP] the regulation is performed with real value of
rPb.
Second probe used to regulate room temperature. If
[rPb = nP] the regulation is performed with real value
of rPA.
The value used to regulate room temperature is
obtained by:
value_for_room = (rPA*rPE + rPb*(100-rPE))/100
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
is performed with real value of dPb.
regulation is performed with real value of dPA.
The value used to regulate room temperature is
obtained by:
value_for_defrost= (dPA*dPE + dPb*(100-dPE))/100
in = hot gas defrost.
parameters;
in = defrost activation with idF parameter.
[0.1°C to 25.5°C]
[1°F to 45°F]
If the difference between two defrost probes sta ys
lower than dtP, for all ddP time, the defrost will be
activated.
0 to 60min See “Differential desfrost” in par. 12.3.
d2P n
End defrost control with two probes. n; Y
management;
Y = the instrument stops the defrost when dPA is
higher than dtE temperature and dPb is higher than
dtS temperature.
dtE 8.0 End defrost temperature on probe A (dPA).
dtS 8.0 End defrost temperature on probe B (dPb).
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 10/14
[-55.0°C to 50.0°C]
[-67°F to 122°F]
[-55.0°C to 50.0°C]
[-67°F to 122°F]
Set the temperature m easured by the evaporator probe
dPA which stops the defrost. N.B.: parameter enabled
only when the evaporator probe is present.
Set the temperature m easured by the evaporator probe
dPb which stops the defrost. N.B.: parameter enabled
only when the evaporator probe is present.
Page 11
When
dPA
and
dPb
aren’t present, it sets the defrost
rt
= real temperature for
Lod
probe;
First probe used for fan. If
[FPA = nP]
the regulation is
It defines the percentage of the
FPA
respect to
FPb
.
C-n
= running with the solenoid
valve, OFF during the
With
[FnC = C
-
n
or
C-Y]
(fan activat
ed in parallel with
With
[
FnC = C
-
n
or
C-Y]
(fan activated in parallel with
UAL
= t
he output is at
FSA
value (manual value);
trA = AC:
dew-point offset;
trA = AC:
Anti-sweat heaters cycle period
;
idF 6
MdF 45
dSd 0
dFd rt
dAd 30
Fdt 0
dPo n
dAF 0.0
F AN
FPA P2
FPb nP
FPE 100
FnC O-n
Fnd 10
FSt 10.0
FHY 1.0
tFE n
Fod 0
Fon 0
FoF 0
trA UAL
SOA 0
SdP 30.0
ASr 1.0
PbA 5.0
AMi 0
AMA 100
Defrost interval. 0 to 120hours
(Maximum) duration for defrost. 0 to 255min
Defrost start delay after request. 0 to 255min
Display during defrost. rt; it; SEt; dEF
Display delay. 0 to 255min
Drain down time after defrost. 0 to 255min
Defrost at power-on. n; Y
Defrost delay after continuous cycle. 0.0 to 24h00min (144)
Fan probe A
Fan probe B.
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
Virtual probe percentage (fan management). 0 to 100%
Fan operating mode. C-n; C-Y; O-n; O-Y
Fan delay after defrost. 0 to 255min
Fan stop temperature.
Fan stop differential
[-55.0°C to 50.0°C]
[-67°F to 122°F]
[0.1°C to 25.5°C]
[1°F to 45°F]
Thermostatic fan functioning during defrost n; Y -
Fan activation time after defrost (without
compressor)
0 to 255min It forces fan activation for the indicated time.
Fan ON time 0 to 15min
Fan OFF time 0 to 15min
Kind of PWM regulation UAL; rEG; AC
Manual value of the analog output AMi to AMA
Default Dew-Point value (or safety value in case of
XWEB link lost)
Differential for fan / offset for anti sweat heater.
Proportional band for modulating output.
[-55.0°C to 50.0°C]
[-67°F to 122°F]
[-25.5°C to 25.5°C]
[-45°F to 45°F]
[0.1°C to 25.5°C]
[1°F to 45°F]
Minimum output for modulating output. 0 to AMA
Maximum output for modulating output. AMi to 100
It sets the time interval between the beginning of two
defrost cycles.
[EdF = in]: it is the interval between 2 defrost;
[EdF = rtC]: it is the safety interval in case of clock
alarm [RtC – RtF].
[idF = 0]: the defrost can be acti vated only manually, or
through RS485 or from external contact or from LAN.
duration, otherwise it sets the maximum duration for
defrost.
Useful when different defrost start times are necessary
to avoid overloading the plant.
it = initial temperature (reading when defrost start);
SEt = set-point value;
dEF = “dEF” label is visualized.
Set the maximum time between the end of defrost a nd
the restarting of the real room temperature display.
Time interval between reaching defrost termination
temperature and the restoring of the control’s normal
operation. This time allows the evaporator to eliminate
water drops that might have formed due to defrost.
The fan and the thermoregulation output are OFF
during this time.
First defrost after start-up:
Y = Immediately;
n = after the idF time.
Time interval between the end of the fast freezing c ycle
and the following defrost related to it.
Format: hours.10min, resolution: 10min.
performed with real value of FPb.
Second probe used for defrost. If [FPb = nP] t he
regulation is performed with real value of FPb.
The value used to regulate room temperature is
obtained by:
value_for_defrost= (FPA*FPE + FPb*(100-FPE))/100
defrost;
C-Y = running with the solenoid valve, ON during t he
defrost;
O-n = continuous mode, OFF during the defrost;
O-Y = continuous mode, ON during the defrost.
The time interval between the ending of the defrost and
the starting of the evaporator fans.
Evaporator probe temperature above which the fan is
always OFF.
When stopped, fan restarts when fan probe reaches
[FSt – FHY] value of temperature.
compressor), it sets the e vaporator fan ON cycling time
when the compressor is off. With [Fon = 0] and [FoF ≠
0] the fan is always off, with [Fon = 0] and [FoF = 0]
the fan is always off.
compressor) it sets the evaporator f an off cycling time
when the com pressor is off. With [Fon = 0] and [FoF ≠
0] the fan are always off, with [Fon = 0] and [FoF = 0]
the fan are always off.
rEG = the output is regulated with fan algorithm
described in fan section;
AC = anti-sweat heaters control (require XWEB5000
system).
Value for the output if [trA = UAL] (0 to 100%).
Default value of dew-point used when there is no
supervising system (XWEB5000). Used only if [trA =
AC].
trA = rEG: differential for modulating fan regulation.
Differential for anti-sweat heaters.
Minimum value for analog output: (0 to AMA).
Maximum value for analog output: (AMi to 100).
AMt 10
ALARM
rAL tEr
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 11/14
Time with fan at maximum speed or ON time for
relay on Anti-sweat regulation.
Probe for room temperature alarm. nP; P1; P2; P3; P4; P6; tEr It selects the probe used to signal alarm temperature.
[10 to 60s] or
[10 to 60min]
trA = rEG: Time with fan at maximum speed.
During this time the fan works at maximum speed. If
intended for fan, the basetime is on seconds, for antisweat regulation the basetime is on minutes.
Page 12
rE
= High and Low alarms related to set
-
point;
ALC = rE:
[0.0°C to
50°C] or
[32°F to
90°F];
ALC = rE:
[0.0°C to
50.0°C] or
[32°F to
90°F];
After this t
emperature is reached and
the
ddA
delay
After this temperature is reached and the
ddA
delay
High temperature alarm setting (fan probe)
.
Always
After this temperature is reached and the
FAd
delay
Low temperature alarm setting (fan probe)
Always
W
hen this temperature is reached and after the
FAd
After regulati
ng continuously for
Sti
time, the valve
It defines stop regulation time after
Sti.
During this
Cur =
4 to
20mA current output;
CL =
normally closed;
n =
if the instrument is switched off also the auxiliary
CL
= the digital input is activated by closing the
EAL =
external alarm;
bAL =
serious external alarm;
When
[i1F = PAL]
: t
ime interval to calculate the
CL
means the digital input is activated by closing the
EAL =
external alarm;
bAL =
serious external alarm;
ALC rE
ALU 15.0
ALL 15.0
AHY 1.0
ALd 15
dLU 50.0
dLL -50.0
dAH 1.0
ddA 15
FLU 50.0
FLL -50.0
FAH 1.0
FAd 15
dAo 1.3
EdA 20
dot 20
Sti nU
Std 5
tbA Y
OUTPUT CONFIGURATION:
CoM CUr
AOP CL
iAU n
DIGITAL INPUTS
Room temperature alarm configuration: relative to
set point or absolute.
High room temperature alarm setting.
Low room temperature alarm setting.
Differential for room temperature alarm.
Room Temperature alarm delay. 0 to 255min
High temperature alarm setting (defrost probe).
Always absolute.
Low temperature alarm setting (defrost probe).
Always absolute.
Differential for temperature alarm (defrost probe).
Temperature alarm delay (defrost probe). 0 to 255min
absolute.
absolute.
Differential for temperature alarm (fan probe).
Temperature alarm delay (fan probe). 0 to 255min
Delay of temperature alarm at start-up. 0.0 to 24h00min (144)
Alarm delay at the end of defrost. 0 to 255min
Temperature alarm exclusion after door open. 0 to 255min -
Stop regulation interval.
Stop duration. 1 to 255min
Silencing alarm relay by pressing a key. n; Y -
Modulating output configuration. CUr; tEn
Alarm relay polarity. OP; CL
Auxiliary output independent from ON/OFF state. n; Y
rE; Ab
[0.0°C to 50.0°C] or
[ALL to 150.0°]
[0.0°C to 50.0°C] or
[-55.0°C to ALU]
[0.1°C to 25.5°C]
[1°F to 45°F]
[dLL to 150.0°C]
[dLL to 302°F]
[-55.0°C to dLU]
[-67°F to dLU]
[0.1°C to 25.5°C]
[1°F to 45°F]
[FLL to 150.0°C]
[FLL to 302°F
[-55.0°C to FLU]
[-67°F to FLU]
[0.1°C to 25.5°C]
[1°F to 45°F]
0.0 to 24h00min (144)
nU
Ab = High and low alarms related to the absolute
temperature.
ALC = Ab: [ALL to 150°C] or [ALL to 302°F].
When this temperature is reached and after the ALd
delay time is expired, the HA alarm will be enabled.
ALC = Ab: [-55.0°C to ALU] or [-67°F to ALU].
After this temperature is reached and the ALd delay
time is expired, the LA alarm will be enabled.
Threshold recovery after a temperature alarm .
Time interval between the detection of an alarm
condition and the corresponding alarm signaling.
time is expired, the HAd alarm will be enabled.
time is expired, the LAd alarm will be enabled.
Threshold recovery after a temperature alarm .
Time interval between the detection of an alarm
condition and the corresponding alarm signaling.
time is expired, the HAF alarm will be enabled.
delay time is expired, the LAF alarm will be enabled.
Threshold recovery after a temperature alarm .
Time interval between the detection of an alarm
condition and the corresponding alarm signaling.
After powering on th e instrument: time interval between
the detection of the temperature alarm condition and
the alarm signaling. Format: hours.10min, resolution:
10min.
At the end of the defrost cycle: time interval between
the detection of the temperature alarm condition and
the alarm signaling.
closes for Std time in order to prevent ice creation.
Format: hours.10min, resolution: 10min.
interval, the display shows StP message.
tEn = 0 to 10V voltage output.
OP = normally opened.
output is switched off;
Y = the auxiliary output state is unrelated to t he
ON/OFF device status.
i1P CL
i1F dor
d1d 15
i2P CL
i2F LiG
Digital input 1 polarity. OP; CL
EAL; bAL; PAL;
Digital input 1 configuration.
dor; dEF; AUS;
LiG; OnF; Htr;
FHU; ES; HdY
Digital input 1 activation delay. 0 to 255min
Digital input 2 polarity. OP; CL
EAL; bAL; PAL;
Digital input 2 configuration.
dor; dEF; AUS;
LiG; OnF; Htr;
FHU; ES; HdY
contact;
OP = the digital input is activated by opening the
contact.
PAL = pressure switch activation; dor = door open;
dEF = defrost activation; AUS = auxiliar y activation;
LiG = light activation; OnF = switch on/off the
instrument;
Htr = change type of action; FHU = not used;
ES = activate energy saving; HdY = activate holiday
function.
number of the pressure switch activation.
When [i1F = EAL or b AL] (external alarms): d1d
parameter defines the time delay between the detection
and the successive signaling of the alarm.
When [i1F = dor]: this is the delay to activate door
open alarm.
contact;
OP means the digital input is activated by opening the
contact.
PAL = pressure switch activation; dor = door open;
dEF = defrost activation; AUS = auxiliar y activation;
LiG = light activation; OnF = switch on/off the
instrument;
Htr = change type of action; FHU = not used;
ES = activate energy saving; HdY = activate holiday
function.
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 12/14
Page 13
When
[i2F = PAL]
: time interval to calculate the
CL
means the digital input is activated by closing the
EAL =
external alarm;
bAL =
serious external alarm;
When
[i3F = PAL]
: time interval to calculate the
no
= normal;
Fan
= Fan
OFF;
CPr
= Compressor OFF;
The outputs stopped b y the
OdC
parameter can restart
n
= the section doesn’t send a global defrost command;
n
=
the end of the LAN defrosts are independent;
n
= the set
-
point value is modified only in the local
n
=
the set
-
point value is modified only in the local
n =
the value of pressure probe is read from local
n =
not used;
d2d 5
i3P CL
i3F ES
d3d 0
nPS 15
OdC F-C
rrd 15
Digital input 2 activation delay. 0 to 255min
Digital input 3 polarity. OP; CL
Digital input 3 configuration.
Digital input 3 activation delay. 0 to 255min
Number of pressure switch activations before lock. 0 to 15
Compressor and fan status when open door. no; FAn; CPr; F-C
Output restart delay with door open. 0 to 255min
ENERGY SAVING
ESP P1
HES 0.0
PEL nU
Energy saving probe selection. nP; P1; P2; P3; P4; P6; tEr
Temperature increasing during Energy Saving.
Energy saving activation when Light or/and AUX are
switched off.
L AN MANAGEMENT
EAL; bAL; PAL;
dor; dEF; AUS;
LiG; OnF; Htr;
FHU; ES; HdY
[-30.0°C to 30.0°C]
[-54°F to 54°F]
nU(0); LIG(1); AUS(2); LEA(3)
number of the pressure switch activation.
When [i2F = EAL or b AL] (external alarms): d2d
parameter defines the time delay between the detection
and the successive signaling of the alarm.
When [i2F = dor]: this is the delay to activate door
open alarm.
contact;
OP means the digital input is activated by opening the
contact.
PAL = pressure switch activation; dor = door open;
dEF = defrost activation; AUS = auxiliar y activation;
LiG = light activation; OnF = switch on/off the
instrument;
Htr = change type of action; FHU = not used;
ES = activate energy saving; HdY = activate holiday
function.
number of the pressure switch activation.
When [i3F = EAL or b AL] (external alarms): d3d
parameter defines the time delay between the detection
and the successive signaling of the alarm.
When [i3F = dor]: this is the delay to activate door
open alarm.
Number of activation of the pressure switch, during the
d1d, d2d and d3d interval, before signaling the alarm
event [i1F, i2F or i3F = PAL]. If the nPS activation in
the d1d, d2d or d3d time is reached, switch off and on
the instrument to restart normal regulation.
F_C = both Compressor and Fan OFF.
after rrd time.
-
Sets the increasing value of the set point during the
Energy Saving cycle.
Energy saving enabled when:
- LiG: light switched off;
- AUS: AUX switched off;
- LEA: both light and AUX switched off.
If nU then not used function.
LMd Y
dEM Y
LSP n
LdS n
LOF n
LLi Y
LAU n
LES n
LSd n
LPP Y
LCP n
Defrost Synchronization. n; Y
Defrost end Synchronization. n; Y
LAN set-point Synchronization. n; Y
LAN Display Synchronization (temperature sent via
LAN).
n; Y
LAN ON/OFF Synchronization. n; Y
LAN Light Synchronization. n; Y
AUX Synchronization. n; Y
Energy Saving Synchronization. n; Y
Remote probe displaying. n; Y
Pressure probe through the LAN. n; Y
Probe 4 through the LAN. n; Y
Y = the section sends a comm and to start defrost to
other controllers.
Y = the end of the LAN defrosts are synchronized.
section;
Y = the section set-point, when modified, is updated to
the same value on all the other sections.
section;
Y = the value displayed by the section is sent to all the
other sections.
This parameter states if the On/Off command of the
section will act on all the other ones too:
n = the On/Off command acts only in the local section;
Y = the On/Off command is sent to all the other
sections.
This parameter states if the light command of the
section will act on all the other ones too:
n = the light command acts only in the local section;
Y = the light command is sent to all the other sections.
This parameter states if the AUX command of the
section will act on all the other ones too:
n = the light command acts only in the local section;
Y = the light command is sent to all the other sections.
This parameter states if the energy saving command of
the section will act on all the other ones too:
n = the Energy Saving command acts only in the local
section;
Y = the Energy Saving command is sent to all the other
sections.
This parameter states if the section has to display the
local probe value or the value coming from another
section:
n = the displayed value is the local probe one;
Y = the displayed value is the one coming from another
section (which has parameter LdS = Y).
probe;
Y = the value of pressure probe is sent via LAN.
StM n
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 13/14
Cooling request from LAN enable compressor relay. n; Y
Y = a generic cooling requests from LAN acti vate the
solenoid valve connected to compressor relay.
Page 14
PROBE CONFIGURATION
nP =
not present;
PtC =
Ptc;
ntC =
ntc;
PtM =
Pt1000
nP =
not present;
PtC =
Ptc;
ntC =
ntc;
PtM =
Pt1000;
Identifies the instrument address (
1 to
LSn
) inside local
P1C ntC
ot 0
P2C ntC
oE 0
P3C nP
o3 0
P4C nP
o4 0
P5C 420
o5 0
P6C PtM
o6 0
NTC (10KΩ a 25°C), PtC (806Ω a 0°C)
P1 configuration. nP; PtC; ntC; PtM
P1 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the thermostat probe.
P2 configuration. nP; PtC; ntC; PtM
P2 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the evaporator probe.
P3 configuration. nP; PtC; ntC; PtM
P3 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 3.
P4 configuration. nP; PtC; ntC; PtM; LAN
P4 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 4.
P5 configuration.
P5 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 5.
P6 configuration. nP; PtC; ntC; PtM
P6 calibration. [-12.0°C to 12.0°C] Allows to adjust possible offset of the probe 6.
SERVICE
CLt - - -
tMd - - -
LSn Auto
LAn Auto
Adr 1
rEL 2.0
Ptb - - -
Pr2 - - -
ON/OFF percentage (C.R.O.). (read only)
Time remaining before next defrost activation (only
for interval defrost).
Number of devices in LAN. 1 to 8 (read only) Shows the number of sections available in the LAN.
List of address of LAN devices. 1 to 247 (read only)
ModBUS address. 1 to 247
Firmware release. (read only) Microprocessor firmware release.
Parameter table. (read only) It shows the original code of the dIXEL parameter map.
Pr2 menu access. (read onl y)
nP; PtC; ntC;
PtM; 420; 5Vr; LAN
(read only)
nP = not present; PtC = Ptc; ntC = ntc; PtM = Pt1000.
nP = not present; PtC = Ptc; ntC = ntc; PtM = Pt1000.
nP = not present; PtC = Ptc; ntC = ntc; PtM = Pt1000.
LAN = value received from master.
420 = 4 to 20mA; 5Vr = 0 to 5V ratiometric; LAN =
value received from master.
nP = not present; PtC = Ptc; ntC = ntc; PtM = Pt1000.
It shows the effecti ve cooling time calculated by XM600
during regulation (cooling time percentage).
It shows time before the next defrost when interval
defrost is selected.
network of multiplexed cabinet controller.
Identifies the instrument address when connected to a
ModBUS compatible monitoring system.
Access to the protected parameter list.
1592023040 XM668D GB r1.1 2011.07.05.doc XM668D 14/14
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