dixell XEV22D Operating Instructions Manual

dIXEL

Operating instruction manual

1592025920

1592025920 XEV22D GB r1.0 2008.09.05.doc XEV22D 1/4

XEV22D

DRIVER FOR STEPPER ELECTRONIC EXPANSION

VALVES

CONTENTS

1.

GENERAL WARNING_________________________________________________ 1

2. GENERAL DESCRIPTION _____________________________________________ 1

3. WIRING CONNECTIONS ______________________________________________1

4. VALVE CONNECTIONS AND CONFIGURATION ___________________________ 1

5. ABSOLUTE MAXIMUM POWER ________________________________________1

6. FRONT PANEL ______________________________________________________1

7. USER INTERFACE___________________________________________________2

8. PARAMETER LIST ___________________________________________________2

9. DIGITAL INPUTS ____________________________________________________3

10. FORCED OPENING __________________________________________________ 3

11. ELECTRICAL CONNECTIONS__________________________________________ 3

12. RS485 SERIAL LINE__________________________________________________ 3

13. HOW TO USE THE HOTKEY ___________________________________________3

14. DISPLAY MESSAGES ________________________________________________4

15. TECHNICAL DATA ___________________________________________________4

16. STANDARD VALUES _________________________________________________4

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 operating 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 faulty operation send the instrument back to the distributor or to “Dixell

S.p.A.” (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 supply 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 XEV22D module is able to drive a large variety of stepper electronic
expansion valves. XEV22D permits to regulate the superheat (SH) of the fluid that

runs into refrigerating unit in order to obtain optimized performance and a
functioning of the evaporator independent by climatic or load conditions. XEV22D
modules are equipped with two probe inputs, one for 4÷20mA or 0÷5V pressure
transducer and another one for Pt1000 or NTC temperature probe. A LAN
connection permits to transmit the pressure signal to others XEV modules in order
to use only one pressure transducer in multiplexed cabinet applications. There are
also two configurable digital inputs, the first one is free of voltage and the other
ones is at high voltage in order to simplify connections with cooling request signal.
With the useful display it’s possible to see the value of superheat (SH), the degree
of opening of the valve or the probe values, the local keyboard allows to program
the instrument without any other devices. To complete instrument equipment, a
RS485 serial link permits to connect XEV22D to

dIXEL monitoring and

supervising systems.

3. WIRING CONNECTIONS

The superheat regulation is performed only when the cooling digital input is
enabled. The following scheme shows how the device takes the request of cooling:

Please see the following scheme to make the right wirings. With "First Level" are
indicated the connections on the floor of the 4 DIN module and, of course, with
"Second Level" the connections of the 1st floor that are only for the stepper motor
of the valve and for HOTKEY.

4. VALVE CONNECTIONS AND CONFIGURATION

!!!!!!!!!! WARNING !!!!!!!!!!!!!!

To 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:

tEP Model

LSt

(steps*10)

uSt

(steps*10)

CPP

(mA*10)

CHd

(mA*10)

Sr

(step/s)

0

Manual settings

Par Par Par

Par

Par
1 Sporlan SEI 0.5-20 10 159 20 5 200
2 Sporlan SEI 30 20 319 20 5 200
3 Sporlan SEH 50-250 40 638 20 5 200
4 Alco EX5-EX6 10 75 40 10 450
5 Alco EX7 25 160 75 25 330
6 Alco EX8 330 step/s 25 260 80 50 330
7 Alco EX8 500 step/s 25 260 80 50 500
8 Danfoss ETS-25/50 20 262 14 8 120
9 Danfoss ETS-100 30 353 14 8 120

10 Danfoss ETS-250/400 35 381 14 8 120

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. In any case,

the unique and valid reference has to be considered the datasheet made by
manufacturer of the valve:

4 WIRES VALVES (BIPOLAR)

Connection

numbering

ALCO EX* ALCO EX5/6

SPORLAN

SEI-SHE

DANFOSS

ETS
4 WHITE BLUE WHITE BLACK
2 YELLOW BROWN BLACK WHITE
3 BROWN BLACK RED RED
1 GREEN WHITE GREEN GREEN

5-6 WIRES VALVES (UNIPOLAR)

Connection

numbering

SPORLAN SAGINOMIYA

4 ORANGE ORANGE
2 RED RED
3 YELLOW YELLOW
1 BLACK BLACK

5 – Common GRAY GRAY

AFTER MAKING THE CONNECTION, PLEASE SWITCH OFF AND ON THE XEV
CONTROLLER IN ORDER TO BE SURE OF THE RIGHT POSITIONING OF THE
VALVE.

5. ABSOLUTE MAXIMUM POWER

XEV22D is able to drive a wide range of stepper valves, in the following table are

indicated the maximum values of current that the actuator can supply to the stepper
wiring. The

dIXEL transformer to use is the TF20D.

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

(4 wires)

Maximum Current

0.9A

VALVE

TYPE

UNIPOLAR VALVES

(5-6 wires)

Maximum Current

0.33A

6. FRONT PANEL

dIXEL

Operating instruction manual

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1592025920 XEV22D GB r1.0 2008.09.05.doc XEV22D 2/4

To display and to modify the set
point. In programming mode it
selects a parameter or it
confirms a value.
By pressing and releasing this
key, it’s possible to see the
values of the probes.
In programming mode it slides
the codes of the parameters or it
increases their values.
In programming mode it slides
the codes of parameters or it
decreases their values.

KEYS COMBINATIONS

+

To lock or to unlock the
keyboard

+

To enter programming
mode.

6.1 XEV22D LEDS

On display there are some luminous dots. Their meaning is described in the following table:

LED MODE Function

ON Low pressure alarm
ON Maximum Operating Pressure alarm

OFF Valve is completely closed

BLINKING Valve is moving

ON Valve is completely opened

BLINKING Serial communication present

OFF Serial communication absent

ON Superheat alarm

7. USER INTERFACE

7.1 TO SEE THE READ-ONLY VALUES

1) Press and release o key;

2) First read-only label is showed;

3) Slide labels with o or n narrows;

4) Press SET to see read-only value. To change parameter you want to see,
press SET

5) To leave the fast access menu, press and release SET+o or wait time-out of
about 3 minutes.

7.2 TO SEE THE SET POINT

1) Press the SET key until the set point will be showed;

2) To come back to see temperature, wait about 5s or press newly SET key.

7.3 TO MODIFY THE SET POINT

To change the set point value operate as follows:

1) Press the SET key until the set point will be showed;

2) Use o or n to change its value.

3) Press “SET” to store the new value.

7.4 TO GO TO “PR1” PARAMETERS

To enter in “Pr1” level menu:

1) Pressing SET+ n keys for about 3 seconds.

2) Instruments shows first parameter in Pr1
menu

7.5 TO GO TO “PR2” PARAMETERS

To enter to “Pr2” parameters list:

1. Enter to “Pr1”

2. Select “Pr2” parameter and press
SET

3. The “PAS” label will be shown, then
“0 - - “ with 0 blinking.

4. Insert “321” password through o
and n keys, then press SET to
confirm.

7.6 TO MODIFY THE PARAMETERS VALUE

To change the parameter’s value
operate as follows:

1. Enter the Programming mode by

pressing the Set and n key for
about 3s.

2. Select the required parameter.

3. Press the “SET” key to display its value

4. Use o or n to change its value.

5. Press “SET” to store the new value and move to the following parameter.

To exit: Press SET + o or wait 30s without pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the
time-out to expire.

8. PARAMETER LIST

NOTE: All pressure parameters are relatives or absolutes depending on PrM
parameter.

REGULATION

FtY Kind of gas (R22, 134, 404, 407, 410, 507,CO2): Type of gas used by

plant. Fundamental parameter for correct functioning of all system.

PEO Probe Error opening percentage: (0÷100%) if a temporary probe error

occurs, valve opening percentage is PEo until PEd time is elapsed. If PEO
is different from 0 it assures cooling also with probe error, because even if
the device cannot calculate superheat the valve can work at PEO
percentage.

PEd Probe Error delay before stopping regulation: (0÷239 sec. –

240=On=unlimited) if probe error duration is bigger than PEd valve closes
completely. Pf message is showed. If PEd=On valve opening is PEo until
probe error finishes;

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 val ve has to be reinitialized.

tEP Predefined valve selection: (0÷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 Model

LSt

(steps*10)

uSt

(steps*10)

CPP

(mA*10)

CHd

(mA*10)

Sr

(step/s)

0

Manual settings

Par Par Par

Par

Par
1 Sporlan SEI 0.5-20 10 159 20 5 200
2 Sporlan SEI 30 20 319 20 5 200
3 Sporlan SEH 50-250 40 638 20 5 200
4 Alco EX5-EX6 10 75 40 10 450
5 Alco EX7 25 160 75 25 330
6 Alco EX8 330 step/s 25 260 80 50 330
7 Alco EX8 500 step/s 25 260 80 50 500
8 Danfoss ETS-25/50 20 262 14 8 120
9 Danfoss ETS-100 30 353 14 8 120

10 Danfoss ETS-250/400 35 381 14 8 120

If tEP is different from 0 previous configuration of LSt,uSt,Sr,CPP and

CHd are overwritten.

LSt Minimum number of steps: (0 ÷ 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 correctly 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 perform this procedure
automatically and restart its normal functioning when the
programming mode ends;

USt Maximum number of steps: (LSt÷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 perform this
procedure automatically and restart its normal functioning when the
programming mode ends;

Sr Step rate (10÷600 step/sec) it’s the maximum speed to change step

without losing precision (=losing steps). It’s advised to stay under the
maximum speed;

CPP Current per phase (only bipolar valves): (0÷100*10mA) it’s the

maximum current per phase used to drive valve. It’s used only with

bipolar valves

CHd Holding current per phase (only bipolar valves): (0÷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

OPE Start opening Percentage: (0÷100%) Opening valve percentage when

start function is active and during post defrost phase. This phase duration
is SFd time;

SFd Start Function duration: (0.0÷42.0 min: tens of seconds) It sets start

function duration and post-defrost duration. During this phase the

alarms are neglected

Sti Stop regulation interval: (0.0÷24.0 hours: tens of minutes) after

regulating continuously for Sti time, the valve closes for Std time in order
to prevent ice creation.

Std Stop duration: (0÷60 min.) it defines stop regulation time after Sti. During

this stop display shows StP message

MnF Maximum opening percentage at normal Functioning: (0÷100%)

during regulation it sets the maximum valve opening percentage.

FoP Forced Opening percentage: (0÷100 - nu) if FoP=nu valve works with

regulation algorithm. If Fop is different from nu the valve stays at Fop
opening percentage. This function could be useful during plant starting or
during service operations.

PI PARAMETERS (trained staff)

dIXEL

Operating instruction manual

1592025920

1592025920 XEV22D GB r1.0 2008.09.05.doc XEV22D 3/4

Pb Proportional band: (0.1 ÷

50.0 / 1÷90°F) PI
proportional band. A value
bigger than 5°C is advised;

rS Band Offset: (-12.0 ÷

12.0°C / -21÷21°F) PI band
offset. It permits to move
the proportional band of
the PI. With rS=0 the band
is between Set÷Set+Pb;

inC Integration time: (0 ÷ 255s) PI integration time

PROBE PARAMETERS

tPP type of Pressure transducer: (420 – 5V – LAn) it sets type of pressure

transducer to use: 420= 4÷20mA pressure transducer; 5V= 0÷5V
ratiometric transducer, LAn= the pressure signal comes from another XEV
module.

LPP Enable pressure probe sending in LAN: (n÷Y) if LPP=Y the value of

pressure read by device is sent in LAN. Only one device of the LAN can

have LPP=Y

PA4 Probe value At 4mA or At 0V: (-1.0 ÷ P20 bar / -14 ÷ PSI) pressure value

measured by probe at 4mA or at 0V (related to PrM parameter)

P20 Probe value 20mA or At 5V: (PA4 ÷ 50.0 bar / 725 psi) pressure value

measured by probe at 20mA or at 5V (related to PrM parameter)

oPr Pressure probe calibration: (-12.0 ÷ 12.0 bar / -174÷174 psi)
ttE type of tEmperature probe: (PtM ÷ Ntc) it allows to set the kind of probe

used by the instrument: PtM = Pt1000, ntC = NTC probe.

otE Temperature probe calibration: (-12.0 ÷ 12.0 °C / -21÷21 °F)

DIGITAL INPUTS

i1P Digital Input 1 (Free of voltage) digital input polarity: (cL,OP) CL=

activated when closed; OP= activated when opened

i1F Digital Input 1 (Free of voltage) digital input function: (CCL, rL) CCL=

cooling call; rL= digital input activates relay;

d1d Digital Input 1 (Free of voltage) activation delay: (0÷255 min.) this

activation delay is used only if digital input is configured as rL

i2P Digital Input 2 (High voltage) digital input polarity: (CL,OP) CL=

activated when closed; OP=activated when opened

i2F Digital Input 2 (High voltage) digital input function: (CCL, rL) CCL=

cooling call; rL= digital input activates relay;

d2d Digital Input 2 (High voltage) activation delay: (0÷255 min.) this

activation delay is used only if digital input is configured as rL

ALARM

dAO Alarm delay after restarting regulation: (0.0÷42.0 min: tens of

seconds) time between digital input activation (configured as CCL) and

alarm signalling. The LSH alarm is always signalled also during this time;

tdA Type of alarm signalled by relay: (ALL, SH, PrE, di) ALL= all alarm; SH=

superheat alarm; PrE= pressure alarm; di= activation only when digital
input configured as rL is actived;

LPL Lower Pressure Limit for superheat regulation: (PA4 ÷ P20 bar / psi )

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) if

suction pressure exceeds maximum operating pressure value, instrument
signals situation with alarm LED

. (related to PrM parameter)

LOP Lowest Operating Pressure: (PA4 ÷ P20 bar / psi) if the suction pressure

comes down to this value a low pressure alarm is signalled with alarm LED

. (related to PrM parameter)

PHy Pressure alarm Hysteresis: (0.1 ÷ 5.0 bar / 1÷ 72 PSI) alarm hysteresis

to disable alarm signalling.

dML delta MOP-LOP: (0 ÷ 100%) when a MOP alarm occurs valve will close of

the dML percentage every one second until MOP alarm is active. When
LOP occurs valve will open of the dML percentage every one second until
LOP alarm is active.

MSH Maximum SuperHeat alarm: (LSH÷32,0°C / LSH÷176°F) when superheat

exceeds this value an high superheat alarm is signalled after interval SHd

LSH Lowest SuperHeat alarm: (0.0÷MSH °C / 32÷MSH °F) when superheat

goes down to this value a low superheat alarm is signalled after interval

SHd

SHy SuperHeat alarm Hysteresis: (0.0÷25.5°C / 1÷77°F) hysteresis for

superheat alarm deactivation

SHd SuperHeat alarm activation delay: (0÷255s) when a superheat alarm

occurs, the time SHd have to pass before signalling alarm

FrC Fast-recovery Constant: (0÷100s) permits to increase integral time when

SH is below the set-point. If FrC=0 fast recovery function is disabled.

DISPLAY

Lod Local display:(SH, PEr, P1, P2) SH= superheat; PEr = valve opening

percentage; P1= value of temperature measured; P2= pressure measured
by P2 probe;

CF Temperature measurement units: (°C÷°F) °C= Celsius degree; °F=

Fahrenheit degree; ATTENTION: by changing measurement unit, the
regulation parameters have to be correctly changed

PMu Pressure Measurement units: (bAr, PSI) bAr= bar; PSI= psi;

ATTENTION: by changing measurement unit, the regulation parameters

have to be correctly changed

rES Resolution (only °C): (dE÷in)
PrM Pressure visualization Mode: (rEL÷AbS) rEL= relative pressure; AbS=

absolute pressure; All pressure parameters depend on this parameter

CLP CooLing Percentage (read only): Display the percentage of time during

which the cooling call was active in the time interval defined by parameter
CLt

tP1 temperature Probe value (read only): it shows temperature probe value

from P1

PPr Pressure probe value (read only): it shows pressure probe value. The

value depends on PrM.

tP2 temperature from P2 (read only): it shows temperature obtained from

conversion of pressure value

OPP Opening Percentage (read only): it shows the actual opening percentage

of the valve;

d1S Free of voltage digital input State (read only): it shows the free of

voltage digital input;

d2S High voltage digital input State (read only): it shows the high voltage

digital input state;

Adr RS485 Serial Address: (1÷247) Identifies the instrument address when

connected to a ModBUS compatible monitoring system.

Mod ModBus: (AdU÷StD) AdU= (Only for XWEB systems) in this case XEV

and thermostatic controller are considered an alone instrument (it requires
a custom library for XWEB); StD= to use XEV in stand-alone mode, in this
case normal Modbus-RTU protocol is used;

Ptb Parameters map: (read only) it identifies parameters map written by

factory

rEL Release Firmware: (read only) it shows firmware release
Pr2 Second level menu

9. DIGITAL INPUTS

The device is provided with two digital inputs. One is free of voltage and the other is
at high voltage and both can be configured as cooling call. In this way the cooling
signal can come from instruments with direct load outputs or via instruments with
output without voltage. One of these inputs must be configured as cooling call.

10. FORCED OPENING

If necessary, by changing FoP parameter it’s possible to force the valve opening.
For example, by setting FoP=50 the valve will be open at half of full scale. To
disable this function it’s necessary to set FoP=nu (default value). The valve
opening is enabled only when CCL digital input is enabled.

11. ELECTRICAL CONNECTIONS

The instrument are provided with disconnectable screw terminal block to connect
cables with a cross section up to 2,5 mm

2

. Heat-resistant cables have to be used.
Before connecting cables make sure the power supply 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.

11.1 PROBES

Advised temperature probe placement
is illustrated in figure nearby. Between
0 and 180 inclination degrees respect
to horizontal pipe section. For suction
pressure probe there aren’t any
particular prescriptions

12. RS485 SERIAL LINE

All models can be connected to the monitoring and supervising system XWEB3000.
If Mod=Std standard ModBUS-RTU protocol is used, if Mod=AdU custom XWEB
library is required. This last configuration makes possible to use the same serial
address of the thermostat that gives the cooling request to XEV. In this way, it’s
possible to reduce the number of addresses used.

13. HOW TO USE THE HOTKEY

13.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)

1) Program one controller with the front keypad.

2) When the controller is ON

, insert the “Hot key” and push o key; the "uPL"

message appears followed a by flashing “End”

3) Push “SET” key and the End will stop flashing.

4) Turn OFF

the instrument remove the “Hot Key”, then turn it ON again.

NOTE: the “Err” message is displayed for failed programming. In this case push
again o key if you want to restart the upload again or remove the “Hot key” to abort
the operation.

13.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY (DOWNLOAD)

1) Turn OFF the instrument.

2) Insert a programmed “Hot Key” into the 5 PIN connector and then turn the

Controller ON.

dIXEL

Operating instruction manual

1592025920

1592025920 XEV22D GB r1.0 2008.09.05.doc XEV22D 4/4

3) Automatically the parameter list of the “Hot Key” is downloaded into the
Controller memory, the “doL” message is blinking followed a by flashing
“End”.

4) After 10 seconds the instrument will restart working with the new parameters.

5) Remove the “Hot Key”.

NOTE the message “Err” is displayed 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.

14. DISPLAY MESSAGES

Mess. Cause Outputs

“nA”

None of digital inputs configured as CCL are
activated

Valve closed

“Pf”

The PEd time is elapsed and the regulation is
stopped

Valve closed after PEd. There is a probe

error
“P1” Temperature probe fault according to PEo and PEd
“P2” Pressure transducer fault according to PEo and PEd

“HSH” High superheat alarm By PI

“LSH” Low superheat alarm Valve Closed
“LPL” Low pressure limit see LPL parameter

“MOP” Maximum Operating Pressure see dML parameter

“LOP” Lowest Operating Pressure see dML parameter

“StF” Start Function enabled see SFd parameter
“StP” Regulation stop caused by Std and Sti Valve closed
“EE” Memory anomaly

14.1 ALARM RECOVERY

Probe alarms “P1”, “P2” start few seconds after the fault in the probe; they
automatically stop few seconds after the probe restarts normal operation. Check
connections before replacing the probe. Max. and min. alarms “HSH” “LSH” “MOP”
“LOP” automatically stop as soon as the variable returns to normal values.
The instrument is provided with an internal check verifying memory integrity. Alarm
“EE” flashes when a failure in the internal memory is detected. In such case call the
service.

15. TECHNICAL DATA

Housing: self extinguishing ABS.
Case: 4 DIN modules 70x135mm with male and female connectors; depth 60mm;
Mounting: DIN RAIL mounted in a omega (3) din rail
Protection: IP20.
Connections: disconnectable Screw terminal block ≤ 2,5 mm

2

wiring.

Power supply: 24Vac/dc ±10%;
Power absorption: depending on connected valve 20VA max
Display: three digits with icons, red LEDs, height 14,2 mm.
Inputs: 1 temperature probe Pt1000 or NTC;
1 pressure transducer 4÷20mA o 0÷5V;
Digital inputs: 1 free of voltage

1 at High voltage

Outputs for valve: bipolar or unipolare valves
Data storage: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution grade: normal; Software Class: A
Operating temperature: 0÷60°C; Storage temperature: -25÷60 °C.
Relative humidity: 20÷85% (no condensing)
Resolution: 0,1 °C or 1 °F; Precision a 25°C:: ±0,7 °C ±1 digit

16. STANDARD VALUES

Label Description Range Default Level

FtY

Kind of gas

R22 , 134 , 404, 407,

410, 507, CO2

404 Pr2

PEo

Probe Error opening percentage 0 ÷ 100 % 50 Pr2

PEd

Probe Error delay before stopping
regulation

0 ÷ 239 s - On On Pr2

tEU

Type of Stepper motor uP – bP bP Pr2

tEP

Automatic Valve configuration 0÷10 1 Pr2

LSt

Minimum number of steps 0 – Ust See tEP Pr2

USt

Maximum number of steps LSt – 800*10 See tEP Pr2

Sr

Step rate 10 ÷ 600 step/s See tEP Pr2

CPP

Current per phase (only bipolar valves) 0 ÷ 100 *10mA See tEP Pr2

CHd

Holding current per phase (only bipolar
valves)

0 ÷ 100 *10mA See tEP Pr2

OPE

Start opening Percentage 0 ÷ 100 % 85 Pr2

SFd

Start Function duration

0.0÷42.0 minutes: tens

of seconds

1.3

Pr2

Sti

Stop regulation interval

0.0÷24.0 hours: tens of

minutes

0

Pr2

Std

Stop duration 0 ÷ 60 min. 0 Pr2

MnF

Maximum opening percentage 0 ÷ 100 % 100 Pr2

FOP

Forced Opening time-out 0 ÷ 100 % - nu nu Pr2

PI PARAMETERS (trained staff)

Pb

Proportional band 0.1 ÷ 50.0 °C / 1÷90 °F 10.0 Pr2

rS

Band Offset

-12.0 ÷ 12.0 °C / -21 ÷
21°F

0.0 Pr2

inC

Integration time 0 ÷ 255 s 120 Pr2

PROBE PARAMETERS

tPP

Type of pressure transducer 420 - 5V- LAn 420 Pr2

LPP

Enable pressure probe sending
in LAN

n ÷ Y n Pr2

PA4

Probe value at 4mA or at 0V (related to
PrM parameter)

-1.0 bar / -14 PSI -0.5 Pr2

P20

Probe value at 20mA or at 5V (related
to PrM parameter)

PA4 ÷ 50.0 bar / 725

PSI

11.0 Pr2

oPr

Pressure probe calibration

-12.0 ÷ 12.0 bar / -174 ÷
174 psi

0 Pr2

ttE

type of temperature probe PtM ÷ ntc PtM Pr2

otE

Temperature probe calibration

-12.0 ÷ 12.0 °C / -21 ÷
21 °F

0 Pr2

DIGITAL INPUTS

i1P

Free of voltage digital input polarity cL – OP CL Pr2

i1F

Free of voltage digital input function CCL , rL CCL Pr2

d1d

Digital input 1 (free of voltage)
activation delay

0 ÷ 255 min. 0 Pr2

i2P

Main voltage digital input polarity cL – OP CL Pr2

i2F

Main voltage digital input function CCL , rL CCL Pr2

d2d

Digital input 2 (Main voltage) activation
delay

0 ÷ 255min. 0 Pr2

ALARMS

dAO

Alarm delay after restarting regulation

0.0÷42.0 min: tens of

seconds

10.0

Pr2

tdA

Type of alarm signalled by relay ALL, SH, PrE, DI ALL Pr2

LPL

Lower pressure limit for superheat
regulation (related to PrM parameter)

PA4 ÷ P20 bar / PSI -0.5 Pr2

MOP

Maximum operating pressure threshold
(related to PrM parameter)

PA4 ÷ P20 bar / PSI 11.0 Pr2

LOP

Minimum suction pressure limit (related
to PrM parameter)

PA4 ÷ P20 bar / PSI -0.5 Pr2

PHy

Pressure alarm Hysteresis 0.1 ÷ 5.0 bar / 1÷ 72 PSI 0.1 Pr2

dML

delta MOP-LOP 0 ÷ 100% 30 Pr2

MSH

Maximum superheat alarm

LSH ÷ 32.0 °C / LSH ÷

176 °F

80.0 Pr1

LSH

Lowest superheat alarm

0.0 ÷ MSH °C / 32 ÷
MSH °F

2.5 Pr1

SHy

Superheat hysteresis 0.1 ÷ 25.5 °C / 1 ÷ 77°F 0.1 Pr2

SHd

Superheat alarm activation delay 0 ÷ 255 s 120 Pr1

FrC

Fast-Recovery Constant 0÷100 s 50 Pr2

DISPLAY

Lod

Local display SH - PEr – P1 - P2 SH Pr1

CF

Temperature measurement units °C - °F °C Pr2

PMu

Pressure measurement unit bAr – PSI bAr Pr2

rES

Resolution (only °C) dE – in dE Pr2

PrM

Type of pressure (Absolute / relative) rEL – AbS rEL Pr2

CLP

Cooling call percentage

Read only

- - - Pr2

tP1

Temperature probe value Read only - -- Pr1

PPr

Pressure probe value

Read only

- - - Pr1

tP2

Temperature converted from pressure
probe

Read only

- - - Pr1

OPP

Acutal Opening percentage

Read only

- - - Pr1

d1S

Free of voltage digital input state

Read only

- - - Pr1

d2S

Main voltage digital input state

Read only

- - - Pr1

Adr

Serial address 1÷247 1 Pr2

Mod

Modbus type Std – AdU StD Pr2

Ptb

Parameters map - - - - - - Pr2

rEL

Release software - - - - - - Pr2

Pr2

Second level menu - - - - - - Pr1

dIXEL S.p.a.

Z.I. Via dell’Industria, 27 - 32010 Pieve d’Alpago (BL) ITALY
tel. +39 - 0437 - 98 33 - fax +39 - 0437 - 98 93 13

http://www.dixell.com

E-mail: [e-mail]