Emerson XEV22D User manual

026-1206 Rev 3 13-DEC-2012
XEV22D Driver for Stepper
Electronic Expansion Valves Installation
and Operation Manual

Emerson Climate Technologies Retail Solutions
1065 Big Shanty Road NW, Suite 100
Kennesaw, GA 30144, USA
Phone: [phone]
Fax: [phone]

Table of Contents • v
Table of Contents
1 INTRODUCTION.......................................................................................................................................................... 1
1.1. GENERAL WARNING ..................................................................................................................................................... 1
2 OVERVIEW................................................................................................................................................................... 1
2.1. GENERAL DESCRIPTION................................................................................................................................................ 1
2.2. ORDERING CODE .......................................................................................................................................................... 1
3 WIRING CONNECTIONS........................................................................................................................................... 2
4 WIRING GUIDELINES................................................................................................................................................ 3
5 MOUNTING AND POWERING ................................................................................................................................. 4
5.1. INSTALLATION .............................................................................................................................................................. 4
5.2. POWERING THE XEV22D ............................................................................................................................................. 4
5.2.1. Choosing Transformer Sizes................................................................................................................................. 4
5.2.2. XEV22D Power Wiring......................................................................................................................................... 5
5.2.3. Wire Type and Maximum Distances ..................................................................................................................... 5
6 VALVE CONNECTIONS AND CONFIGURATION ............................................................................................... 6
7 ABSOLUTE MAXIMUM POWER............................................................................................................................. 8
8 FRONT PANEL............................................................................................................................................................. 9
8.1. KEYS AND FUNCTIONS ................................................................................................................................................. 9
8.2. XEV22D LEDS............................................................................................................................................................ 9
9 USER INTERFACE .................................................................................................................................................... 10
9.1. TO SEE THE READ-ONLY VALUES ............................................................................................................................. 10
9.2. TO SEE THE SETPOINT ................................................................................................................................................ 10
9.3. TO MODIFY THE SETPOINT......................................................................................................................................... 10
9.4. TO ENTER PR1 PARAMETERS LIST ............................................................................................................................. 10
9.5. TO ENTER PR2 PARAMETERS LIST ............................................................................................................................. 10
9.6. TO MODIFY THE PARAMETERS VALUE ...................................................................................................................... 10
9.7. HOW TO ASSIGN A MODBUS ADDRESS.................................................................................................................... 11
10 PARAMETERS.......................................................................................................................................................... 12
11 DIGITAL INPUTS..................................................................................................................................................... 17
12 FORCED OPENING................................................................................................................................................. 17
13 ELECTRICAL CONNECTIONS ............................................................................................................................ 17
13.1. PROBES ..................................................................................................................................................................... 17
14 RS485 SERIAL LINE................................................................................................................................................ 17
15 HOW TO USE THE HOT KEY............................................................................................................................... 18
15.1. HOW TO PROGRAM A HOT KEY FROM THE CONTROLLER (UPLOAD)...................................................................... 18
15.2. HOW TO PROGRAM THE CONTROLLER USING A HOT KEY (DOWNLOAD) ............................................................... 18
16 DISPLAY MESSAGES ............................................................................................................................................. 19
16.1. ALARM RECOVERY................................................................................................................................................... 19

vi • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
17 SPECIFICATIONS ................................................................................................................................................... 20
18 E2 MODBUS NETWORK WIRING ....................................................................................................................... 21
19 ECT MODBUS NETWORKING TO E2S............................................................................................................... 22
19.1. COM PORT ASSOCIATIONS - E2 VERSIONS 3.XX AND BELOW ................................................................................ 22
19.2. COM PORT ASSOCIATIONS - E2 VERSIONS 4.2 AND ABOVE ................................................................................... 23
19.3. E2 SETUP OF DEVICES .............................................................................................................................................. 23
19.3.1. Set Up Network Ports........................................................................................................................................ 23
19.3.2. Add and Connect the Device............................................................................................................................. 23
19.4. WIRING TYPES .......................................................................................................................................................... 25
19.5. MODBUS TERMINATION BLOCKS ........................................................................................................................... 25
20 STANDARD VALUES .............................................................................................................................................. 26

General Warning Introduction • 1
1 Introduction
1.1. General Warning
Please read the following safety precautions and
warnings before using this manual:
2 Overview
2.1. General Description
The XEV22D controller is capable of driving a
wide variety of stepper electronic expansion valves.
The controller regulates the superheat (SH) of the flu-
id that runs into the refrigeration unit to obtain opti-
mized performance and functioning of the evaporator
independent of climate or load conditions.
XEV22D controllers are equipped with two (2)
probe inputs, one for a 4 to 20mA (or 0 to 5V) pres-
sure transducer and another one for a Pt1000 or NTC
temperature probe.
The LAN connection transmits the pressure signal
to the other XEVs; this allows the use of only one
pressure transducer in multiplexed cabinet applica-
tions. The controller can also have two (2) configu-
rable digital inputs, the first one is free of voltage and
the other one is at high voltage, to simplify connec-
tions with cooling request signal.
With the integrated display, it is possible to see the
superheat (SH) value, the degree of valve opening, or
the probe values; the local keyboard enables the con-
troller to be programmed without any other devices.
An RS485 serial link connects the controller to
other Emerson monitoring and supervising systems.
2.2. Ordering Code
CAUTION!
• This manual is part of the product and
should be kept near the controller for easy
and quick reference.
• The controller should not be used for purposes
different from those described in this manual. It can-
not be used as a safety device.
• Check the application limits before proceeding.
SAFETY PRECAUTIONS AND
WARNINGS!
• Check that the supply voltage is correct
before connecting the controller.
• Do not expose to water or moisture: use the con-
troller only within the operating limits and avoid sud-
den temperature changes with high atmospheric
humidity to prevent condensation from forming.
• Warning! Disconnect all electrical connections
before performing any kind of maintenance.
• Fit the probe where it is not accessible by the end
user. The controller must not be opened.
• In case of failure or faulty operation, send the
controller back to Retail Solutions (see address) with a
detailed description of the fault.
• Verify the maximum current that can be applied
to each relay (see Section 17, Specifications).
• 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 environ-
ments, the use of main filters (our mod. FT1) in paral-
lel with inductive loads could be useful.
Device
Name Dixell Code Emerson Code
XEV22D XEV22D-1C0F0B
X0JFGAESG3NA-000 318-5001
Table 2-1 - Product Ordering Code

2 • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
3 Wiring Connections
The superheat regulation is performed only when the cooling digital input is enabled. Figure 3-1 shows how
the device takes the request of cooling:
See Figure 3-2 for wiring. The “First Level” indicates the connections on the floor of the 4-DIN module and
“Second Level” indicates the connections on the first floor that are only for the stepper motor of the valve and
for the Hot Key.
Figure 3-1 - How XEV22D Acts on Cooling Request
Figure 3-2 - XEV22D Wiring Connections

Ordering Code Wiring Guidelines • 3
4 Wiring Guidelines
DEVICE TYPE RETAIL SOLUTIONS
ANALOG TEMP SENSOR
DIGITAL INPUT
BELDEN #8761 #22-2 SHIELDED
Retail Solutions P/N 035-0002
RS-485 NETWORK BELDEN #8761 #22-2 SHIELDED
Retail Solutions P/N 035-0002
BELDEN #8641 #24-2 SHIELDED
Retail Solutions P/N 135-8641
PRESSURE TRANSDUCER **BELDEN #8771 #22-3 SHIELDED
Retail Solutions P/N 135-8771
**#8771 for alternate 600v rated wire use BELDEN #8618 16
AWG
*STEPPER VALVE Use valve manufacturer’s harness with a maximum length not
to exceed 30 feet (10 meters).
POWER LOADS AND VALVE Allow a maximum wire size of 14 AWG (2 mm2).
Table 4-1 - Wiring Guidelines

4 • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
5 Mounting and
Powering
The XEV22D is usually mounted by the Refriger-
ation equipment manufacturer. Therefore, the install-
er need only make the necessary connections between
the boards and the site controller(s).
In some instances, an installer may be required to
mount the XEV22D. There are no restrictions on the
location of the XEV22D; however, the controller
should be mounted in a location protected from mois-
ture. Typically, mounting inside the electrical control
panel of a package unit is acceptable.
5.1. Installation
The XEV22D uses a DIN mount installation.
5.2. Powering the XEV22D
Retail Solutions supplies a wide variety of 24VAC
transformers with varying sizes without center taps.
Table 5-2 shows the transformer sizes and are non
center-tapped.
5.2.1. Choosing Transformer Sizes
The transformer used to power the XEV22D
should have at least a 20VA rating. The XEV22D
should not share a transformer with any other de-
vices.
Figure 5-1 - DIN Mounting
Mount: On a DIN rail (EN 50022,
DIN 43880) Fastened with
screws via the removable
plastic flaps
Material: PC-ABS Thermoplastic
Self-extinguishing: VO (UL94)
Comparative Tracking
Index (CTI):
300V
Color: Gray
Table 5-1- XEV22D Enclosure Specification

Powering the XEV22D Mounting and Powering • 5
5.2.2. XEV22D Power Wiring
The XEV22D can be powered by one of the 50VA
non-center-tapped transformers listed in Table 5-2.
Neither side of the secondary should be connected
to ground. Also, do not connect the center tap (if pro-
vided on the transformer) to ground. The entire sec-
ondaryofthetransformershould beisolated fromany
ground.
5.2.3. Wire Type and Maximum
Distances
Two-conductor non-shielded cables are the rec-
ommended wire for connecting the transformer to the
XEV22D, see Table 5-3 for power wiring types.
Shielded cable should not be used for power wiring.
The center tap should be left disconnected, if present
on the transformer.
The wire length from the transformer determines
the type wire gauge used. In most cases, the distance
between the XEV22D and the transformer that sup-
plies power to it is not enough to be of concern; how-
ever, it is very important NOT to exceed this
maximum wire length or the controller will not oper-
ate correctly.
Use these formulas to determine if the wire gauge
you are using fits within specification:
Sensors requiring 24VAC should not be powered
from the same transformer powering the input board.
Any devices that will be connected to the XEV22D’s
inputs or outputs must be powered with a separate
24VAC transformer.
Transformer
Part Number VA Rating Primary Voltage
640-0040 50VA 110/208/220 VAC
640-0041 50VA 110 VAC
640-0042 50VA 220 VAC
Table 5-2- Transformer Compatible with XEV22D
Power Wiring Types
14 AWG Belden 9495
18 AWG Belden 9495
Table 5-3- Power Wiring Types
14AWG:
Feet = 1920/VA
18AWG:
Feet = 739/VA
(VA is the total VA rating of the controller)
For example, if you had an 18 VA load:
14 AWG: 24 ft.
18 AWG: 9ft. (rounded down)

6 • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
6 Valve Connections and Configuration
If you can locate your valve in the table, select the valve through the tEP parameter. This way, you can be
sure of the correct configuration (refer to Table 6-1).
Regarding connections, use Table 6-2 below for a quick reference on the connection mode for valves of dif-
ferent manufacturers. In any case, the unique and valid reference has to be considered the datasheet made by
manufacturer of the valve:
CAUTION! 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 the tEP parameter table reported 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 Alco EX4-EX5-EX6 5 75 50 10 500
2 Alco EX7 10 160 75 25 500
3 Alco EX8 500 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-250/400 11 381 10 10 300
7 Sporlan SEI 0.5-11 0 159 16 5 200
8 Sporlan SER 1.5-20 0 159 12 5 200
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
Table 6-1 - tEP Parameter Table
CAUTION! The maximum distance between an XEV22 controller and a valve must not exceed 30 feet (10
meters).
Connection
Numbering ALCO EX* SPORLAN SEI-SEH DANFOSS ETS
4 BLUE WHITE BLACK
2 BROWN BLACK WHITE
3 BLACK RED RED
1 WHITE GREEN GREEN
Table 6-2 - 4-Wire Valves (Bipolar)

Powering the XEV22D Valve Connections and Configuration • 7
It is highly recommended that the maximum dis-
tance of the stepper valve harness length between the
valve and the XEV22D controller must not exceed 30
feet (10 meters).
If the valve harness length must be extended be-
yond 30 feet (10 meters), Emerson Retail Solutions
provides an Inductor Extender (P/N335-3500) for use
with Sporlan Valves ONLY.
The Inductor Extender (P/N 335-3500) is ONLY
for use with Sporlan Bipolar 4-wire stepper valves
with 100 ohm or 75 ohm phase resistance.
When using the Inductor Extender, the XEV22D
controller “CPP” parameter setting MUST be less
than 20; otherwise the Valve, Controller, and/or In-
ductor Extender will be damaged or have its life ex-
pectancy drastically shortened.
Refer to Table 6-1 for the list of the XEV series
controller supported Sporlan Stepper valves. The In-
ductor Extender can ONLY be used with Sporlan Bi-
polar Stepper valves that have a setting of 16 or 12 in
the “CPP” column.
The recommended CPP parameter should NOT be
increased to create AC voltage at the valve, if the
valve harness length is over 30 feet, an Inductor Ex-
tender MUST be added into the 4-wire valve harness.
When using the Inductor Extender
(P/N335-3500), any stepper valve harness extensions
MUST not exceed 170 feet total length.
Use 14 AWG wire for valve harness extensions in
conduit. If the valve harness extension is not in con-
duit, use 16 AWG or 14 AWG shielded cable with the
shield terminated to an earth grounded chassis. For
valve harness extensions over 100 feet, 14 AWG
shielded cable is recommended.
Using an AC volt meter to measure voltage at the
Valve will not produce accurate results with a voltage
chopper constant current stepper valve drivers as used
in XEV22D controllers.
Instead, an AC current meter can be used to mea-
sure valve milliamps as a field verification method.
If the current measurement using the method de-
scribed below is less than the recommended value by
more than 20%, the CPP parameter may be increased
by up to 2 (12 to 14 or 16 to 18). The CPP parameter
MUST be less than 20 when using the Inductor Ex-
tender (P/N 335-3500).
For a CPP parameter of 12, the measured current
should be near 120 mA AC, for a CPP setting of 16,
the measured current should be near 160 mA AC.
Below is a description of using an AC current me-
ter to test a stepper valve:
Using an AC Volt meter to measure the voltage
across a stepper valve will not produce accurate re-
sults if the valve is driven by a voltage chopper con-
stant current valve driver. XEV controllers use a
voltage chopper constant current stepper valve driver.
The stepper valve voltage can be checked by using
an in-line True RMS AC current meter. The AC cur-
rent meter will produce a more accurate reading than
AC voltage due to the valve drive switching the volt-
age to the valve on and off at a frequency much higher
than a voltmeter can read. The voltage chopper con-
stant current valve driver maintains a constant AC
current through the valve while the valve is moving,
which makes an AC mA meter ideal to test the valve.
The current can be read in each of the stepper valves
two windings/phases. Due to the fact that current un-
like voltage is the same at any point in a wire, the cur-
rent test can be performed at the XEV22D controller
or at the valve, and will have the same results. It is no
longer necessary to take apart the case or get on a lift
to access the valve, the in-line current test can be per-
formed at the most convenient location.
An AC clamp meter will not have enough resolu-
tion to read the stepper valve milliamps.
If the current meter used is not a True RMS meter,
the readings will be approximately10% higher due to
the stepper drive producing square waves and not sin
waves.
1. Power down the XEV22D controller.
2. Disconnect the Sporlan valve white wire from the
XEV22D controller.
3. Connect the meter red lead from the meter 10A ter-
minal to the Sporlan valve white wire.
4. Connect the meter black lead from the meter COM
terminal to the XEV22D controller where the Spor-
lan white wire was removed.
5. Change the meter dial selector to AC amps (~A).
Connection
Numbering SPORLAN SAGINOMIYA
4 ORANGE ORANGE
2 RED RED
3 YELLOW YELLOW
1 BLACK BLACK
5- Common GRAY GRAY
Table 6-3 - 5 to 6 Wire Valves (Unipolar)
NOTE: After making the connection, switch
the XEV controller OFF and ON to make sure
that the valve is positioned properly.

8 • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
6. Note the mA terminal on the meter. It should be la-
beled 400 mA or 300 mA.
7. Power up the XEV22D controller.
8. Cycle the valve and verify the meter AC amp read-
ing is less than 0.3A.
9. If step 8reading was less than 0.3A, power down
the XEV22D and move the meter red lead from the
meter 10A terminal to the meter 400 mA or 300mA
terminal.
10. If the meter dial selector has an AC mA selection
(~mA), change to the AC mA selection.
11. Power up the XEV22D controller.
12. Cycle the valve and record the maximum constant
meter AC mA reading.
13. The mA reading should be within 20% of the Phase
current CPP setting.
14. The valve voltage can be calculated by multiplying
the mA reading by the valve coil resistance. For ex-
ample: 102 mA x 100 ohm valve coil = 10.2V.
150mA x 75 ohm valve coil = 11.25V.
The 2nd valve coil current/voltage can be tested by
repeating the above procedure on the Sporlan valve
Green wire and XEV22D controller.
The in-line AC mA meter is also compatible with
the constant voltage stepper valve drivers used in the
MultiFlex ESR, CC100, and CCB.
7 Absolute
Maximum Power
The XEV22D controller is capable of driving a
wide range of stepper valves; listed in Table 7-1 are
the maximum values of current that the actuator can
supply to the stepper wiring. Use the TF20D trans-
former.
CAUTION: 0.3A is 300mA; if the AC amp
reading in step 8 was above your meters mA
terminal label: STOP and check. DO NOT
proceed or your meter will be damaged.
NOTE: The electrical power absorption of the
valve can be unrelated to refrigeration power
that the valve has. Before using the actuator,
read the technical manual of the valve sup-
plied by the manufacturer and check the maximum cur-
rent used to drive the valve to verify that they are lower
than indicated below in Table 7-1.
VALVE
TYPE
Bipolar Valves
(4 Wires) Maximum Current 0.9A
Uni-polar Valves
(5 to 6 Wires) Maximum Current 0.33A
Table 7-1 - Maximum Allowable Valve Current

Keys and Functions Front Panel • 9
8 Front Panel
8.1. Keys and Functions
Table 8-1 shows the keys found on the front panel
of the XEV22D and their corresponding functions:
8.2. XEV22D LEDS
Each LED function is described in Table 8-2:
Figure 8-1 - XEV22D Front Panel
Key Function
To display and to modify the set point. In
programming mode, it selects a parame-
ter or confirms a value.
By pressing and releasing this key, it is
possible to see the values of the probes.
In programming mode, it slides the codes
of the parameters or increases their val-
ues.
In programming mode, it slides the codes
of parameters or decreases their values.
Key Combinations
Table 8-1- XEV22D Front Panel Keys and Functions
To lock and unlock the keyboard.
To enter programming mode.
LED Mode Function
ON Low pressure alarm
ON Maximum operating pres-
sure 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
Table 8-2 - XEV22D LEDs
Key Function
Table 8-1- XEV22D Front Panel Keys and Functions

10 • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
9 User Interface
9.1. To See the Read-Only
Values
1. Press and release the UP arrow key.
2. The first read-only label is displayed.
3. Slide labels using the UP or DOWN arrow keys.
4. Press the SET key to see the read-only value. To
change and view the parameter, press SET.
5. To exit the fast access menu, press and release the
SET + UP arrow keys or wait for the device time-
out for 3 minutes.
9.2. To See the Setpoint
1. Press the SET key until the setpoint is displayed.
2. To return and view the temperature, wait for 5 sec-
onds or press the SET key again.
9.3. To Modify the Setpoint
To change the setpoint value, operate as follows:
1. Press the SET key until the set point is displayed.
2. Use the UP or DOWN arrow keys to change its val-
ue.
3. Press SET to store the new value.
9.4. To Enter Pr1
Parameters List
To enter in Pr1 level menu:
1. Press the SET + DOWN arrow keys for about 3 sec-
onds.
2. The device will display the first parameter in Pr1
menu.
9.5. To Enter Pr2
Parameters List
To enter to Pr2 parameters list:
1. Enter the Pr1 level menu.
2. Select Pr2 parameter and press SET.
3. The PAS label will be displayed followed by a
blinking 0.
4. Insert 321 password using the UP and DOWN ar-
row keys.
9.6. To Modify the
Parameters Value
To change the parameter’s value operate as fol-
lows:
1. Enter the programming mode by pressing the SET
and DOWN arrow keys for about 3 seconds.
2. Select the required parameter.
3. Press the SET key to display its value.
4. Use the UP or DOWN arrow keys to change its val-
ue.
5. Press the SET key to store the new value and move
to the next parameter.
6. To exit, press SET + UP or wait 30 seconds without
pressing a key.
NOTE: The set value is stored even when the
time-out expires and ends the procedure.

How to Assign a MODBUS Address User Interface • 11
9.7. How to Assign a
MODBUS Address
1. To enter the programming mode, press and hold the
SET and DOWN arrow keys together for about
three (3) seconds or until the dots at the top of the
display start flashing.
2. Arrow down to PR2 and press SET to select.
3. PAS for password will display and flash.
4. Use the arrow keys to set the 321 password. Press
SET to save.
5. Use the arrow keys to scroll through and locate
nod. Press SET. Use the arrow keys to scroll
through and locate Std. Press SET.
6. Use the arrow keys to scroll through and locate
Adr. Press SET. Use the arrow keys to choose the
address number of the device. Press SET to save.
7. To exit, press the SET and UP arrow keys together
or wait 15 seconds without pressing a key.
NOTE: If a time-out occurs while setting the
password (PR2 flashes), press SET to resume
entering the password.

12 • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
10 Parameters
NOTE: All pressure parameters are relatives or absolutes depending on the PrM parameter.
Code Description Function
REGULATION
Fty Kind of gas (R22, 134, 404, 407, 410, 507, CO2)
Type of gas used by plant. Fundamental parameter for correct function-
ing of all systems.
PEo Probe error opening percentage (0 to 100%)
If a temporary probe error occurs, valve opening percentage is PEo until
PEd time is elapsed. If PEo is different from 0, it ensures 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 stop-
ping regulation
(0 to 239 sec – 240 = On = unlimited)
If the probe error duration is bigger than PEd, valve closes completely.
The Pf message is displayed. If PEd = On,valve opening is PEo until
probe error finishes.
tEU Type of stepper motor (uP- bP)
Selects the kind of valve.
uP = 5 to 6 wires unipolar valves
bP = 4 wires bipolar valves
CAUTION! By changing this parameter, the valve has to be re-initial-
ized.
tEP Predefined valve selection (0 to 13)
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 controller performs
a fast configuration of the following parameters: LSt,Ust,Sr,CPP, and
CHd. To select the correct value, refer to Table 6-1.
If tEP is different from 0,previous configuration of LSt,Ust,Sr,CPP,
and CHd are overwritten.
HFS Kind of motor movement: (HAF; FUL)
• HAF = half step. Use this setting for the unipolar valve.
• FUL = half step. Use this setting for the bipolar valve.
LSt Minimum number of steps (0 to Ust)
Selects the minimum number of steps. At this number of steps, the valve
should be closed. Read the manufacturer datasheet to set this parameter
correctly. The number of steps should be set within the advised range of
functioning.
CAUTION! When this parameter is changed, the valve must be re-ini-
tialized. The controller performs this procedure automatically and re-
starts its normal functioning when the programming mode ends.
Table 10-1 - List of Parameters

How to Assign a MODBUS Address Parameters • 13
Ust Maximum number of steps (LSt to 800*10)
Selects the maximum number of steps. At this number of steps, the valve
should be opened completely. Read the datasheet provided by the valve
manufacturer to set this parameter correctly. The maximum number of
steps should be set within the advised range of functioning.
CAUTION! When this parameter is changed, the valve must be re-ini-
tialized. The controller performs this procedure automatically and re-
starts its normal functioning when the programming mode ends.
Sr Step rate (10 to 600 step/sec)
Maximum speed to change a step without losing precision
(= losing steps). Set parameter under the maximum speed.
CPP Current per phase (Only bipolar
valves)
(0 to 100 * 10mA)
Maximum current per phase used to drive valve.
CHd Holding current per phase
(Only bipolar valves)
(0 to 100 * 10mA)
The current per phase when the valve is stopped for more than 4 minutes.
oPE Start opening percentage (0 to 100%)
Opening valve percentage when the start function is active and during
post defrost phase. This phase duration is SFd time.
SFd Start function duration (0.0 to 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 to 24.0 hours: tens of minutes)
After regulating continuously for Sti time, the valve closes for Std time
to prevent ice from forming.
Std Stop duration (0 to 60 min)
Defines the stop regulation time after Sti.During this stop, display shows
StP message.
MnF Maximum opening percentage
at normal functioning
(0 to 100%)
During regulation, it sets the maximum valve opening percentage.
FOP Forced opening percentage (0 to 100 - not used; nU)
If FOP = not used; nU, valve works with regulation algorithm. If FOP
is different from not used; nU,the valve stays at FOP opening percent-
age. This function could be useful during plant starting or during service
operations.
PI PARAMETERS (For use of trained staff only)
Pb Proportional band
(0.1 to 50.0 / 1 to 90°F)
PI proportional band. A value
bigger than 5°C is advised.
Code Description Function
Table 10-1 - List of Parameters

14 • XEV22D I&O Manual 026-1206 Rev 3 13-DEC-2012
rS Band offset
(-12.0 to 12.0°C / -21to21°F)
PI band offset. It moves the pro-
portional band of the PI. With
rS = 0,the band is between Set
to Set + Pb.
InC Integration time (0 to 255 sec)
PI integration time
PROBE PARAMETERS
tPP Type of pressure transducer (420 – 5V – LAn)
Sets the type of pressure transducer to use: 420 = 4 to 20mA pressure
transducer; 5V = 0 to 5V ratiometric transducer; LAn = the pressure sig-
nal comes from another XEV module.
LPP Enable pressure probe sending
in LAN
(nto 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 to P20 bar/ -14 to PSI)
Pressure value measured by probe at 4mA or at 0V (related to PrM pa-
rameter).
P20 Probe value 20mA or At 5V (PA4 to 50.0 bar/ 725 psi)
Pressure value measured by probe at 20mA or at 5V (related to PrM pa-
rameter).
OPr Pressure probe calibration (-12.0 to 12.0 bar/ -174 to 174 psi)
ttE Type of temperature probe (PtM to ntC)
Sets the kind of probe used by the controller: PtM = Pt1000, ntC = NTC
probe.
otE Temperature probe calibration (-12.0 to 12.0°C/ -21 to 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 to 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 to 255 min)
This activation delay is used only if digital input is configured as rL.
ALARM
dAo Alarm delay after restarting reg-
ulation
(0.0 to 42.0 min: tens of seconds)
Time between digital input activation (configured as CCL) and alarm
signaling. The LSH alarm is always signaled also during this time.
Code Description Function
Table 10-1 - List of Parameters