Emerson XEV22D Specifications

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: 770-425-2724
Fax: 770-425-9319
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.
9.2.
9.3.
9.4.
9.5.
9.6.
9.7.
TO SEE THE READ-ONLY VALUES .............................................................................................................................
TO SEE THE SETPOINT ................................................................................................................................................
TO MODIFY THE SETPOINT .........................................................................................................................................
TO ENTER PR1 PARAMETERS LIST .............................................................................................................................
TO ENTER PR2 PARAMETERS LIST .............................................................................................................................
TO MODIFY THE PARAMETERS VALUE ......................................................................................................................
HOW TO ASSIGN A MODBUS ADDRESS....................................................................................................................
10
10
10
10
10
10
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
Table of Contents • v
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
vi • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
1
Introduction
2
Overview
1.1. General Warning
2.1. General Description
Please read the following safety precautions and
warnings before using this manual:
The XEV22D controller is capable of driving a
wide variety of stepper electronic expansion valves.
The controller regulates the superheat (SH) of the fluid that runs into the refrigeration unit to obtain optimized performance and functioning of the evaporator
independent of climate or load conditions.
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 cannot 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 controller only within the operating limits and avoid sudden 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 environments, the use of main filters (our mod. FT1) in parallel with inductive loads could be useful.
General Warning
XEV22D controllers are equipped with two (2)
probe inputs, one for a 4 to 20mA (or 0 to 5V) pressure 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 applications. The controller can also have two (2) configurable digital inputs, the first one is free of voltage and
the other one is at high voltage, to simplify connections 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 controller 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
Device
Name
Dixell Code
Emerson
Code
XEV22D
XEV22D-1C0F0B
X0JFGAESG3NA-000
318-5001
Table 2-1 - Product Ordering Code
Introduction • 1
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:
Figure 3-1 - How XEV22D Acts on Cooling Request
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 3-2 - XEV22D Wiring Connections
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026-1206 Rev 3 13-DEC-2012
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
Ordering Code
Wiring Guidelines • 3
5
Mounting and
Powering
The XEV22D is usually mounted by the Refrigeration equipment manufacturer. Therefore, the installer 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 moisture. Typically, mounting inside the electrical control
panel of a package unit is acceptable.
5.1. Installation
The XEV22D uses a DIN mount installation.
Figure 5-1 - DIN Mounting
Mount:
On a DIN rail (EN 50022,
DIN 43880) Fastened with
screws via the removable
plastic flaps
5.2. Powering the XEV22D
Material:
PC-ABS Thermoplastic
Self-extinguishing:
VO (UL94)
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.
Comparative Tracking
Index (CTI):
300V
5.2.1. Choosing Transformer Sizes
Color:
Gray
Table 5-1- XEV22D Enclosure Specification
4 • XEV22D I&O Manual
The transformer used to power the XEV22D
should have at least a 20VA rating. The XEV22D
should not share a transformer with any other devices.
026-1206 Rev 3 13-DEC-2012
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
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 provided on the transformer) to ground. The entire secondary of the transformer should be isolated from any
ground.
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)
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.
5.2.3. Wire Type and Maximum
Distances
Two-conductor non-shielded cables are the recommended 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.
Power Wiring Types
14 AWG
Belden 9495
18 AWG
Belden 9495
Table 5-3- Power Wiring Types
The wire length from the transformer determines
the type wire gauge used. In most cases, the distance
between the XEV22D and the transformer that supplies power to it is not enough to be of concern; however, it is very important NOT to exceed this
maximum wire length or the controller will not operate correctly.
Use these formulas to determine if the wire gauge
you are using fits within specification:
Powering the XEV22D
Mounting and Powering • 5
6
Valve Connections and Configuration
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)
Par
Par
Par
Par
Par
0
Manual settings
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).
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 different manufacturers. In any case, the unique and valid reference has to be considered the datasheet made by
manufacturer of the valve:
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)
6 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
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.
It is highly recommended that the maximum distance 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 beyond 30 feet (10 meters), Emerson Retail Solutions
provides an Inductor Extender (P/N 335-3500) 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 Inductor Extender will be damaged or have its life expectancy drastically shortened.
Refer to Table 6-1 for the list of the XEV series
controller supported Sporlan Stepper valves. The Inductor Extender can ONLY be used with Sporlan Bipolar 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 Extender MUST be added into the 4-wire valve harness.
When using the Inductor Extender
(P/N 335-3500), 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 conduit, 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 measure valve milliamps as a field verification method.
If the current measurement using the method described 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 Extender (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 meter to test a stepper valve:
Using an AC Volt meter to measure the voltage
across a stepper valve will not produce accurate results if the valve is driven by a voltage chopper constant 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 current meter will produce a more accurate reading than
AC voltage due to the valve drive switching the voltage to the valve on and off at a frequency much higher
than a voltmeter can read. The voltage chopper constant 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 unlike voltage is the same at any point in a wire, the current 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 performed at the most convenient location.
An AC clamp meter will not have enough resolution 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 terminal to the Sporlan valve white wire.
4. Connect the meter black lead from the meter COM
terminal to the XEV22D controller where the Sporlan white wire was removed.
5. Change the meter dial selector to AC amps (~A).
Powering the XEV22D
Valve Connections and Configuration • 7
6. Note the mA terminal on the meter. It should be labeled 400 mA or 300 mA.
7. Power up the XEV22D controller.
8. Cycle the valve and verify the meter AC amp reading is less than 0.3A.
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.
9. If step 8 reading 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.
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 transformer.
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 supplied by the manufacturer and check the maximum current used to drive the valve to verify that they are lower
than indicated below in Table 7-1.
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 example: 102 mA x 100 ohm valve coil = 10.2V.
150mA x 75 ohm valve coil = 11.25V.
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
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.
8 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
8
Front Panel
Key
Function
To lock and unlock the keyboard.
To enter programming mode.
Table 8-1- XEV22D Front Panel Keys and Functions
8.2. XEV22D LEDS
Each LED function is described in Table 8-2:
LED
Mode
Function
ON
Low pressure alarm
ON
Maximum operating pressure alarm
OFF
Valve is completely closed
BLINKING
ON
Valve is moving
Valve is completely opened
Figure 8-1 - XEV22D Front Panel
BLINKING
Serial communication
present
OFF
Serial communication
absent
ON
Superheat alarm
8.1. Keys and Functions
Table 8-1 shows the keys found on the front panel
of the XEV22D and their corresponding functions:
Key
Function
To display and to modify the set point. In
programming mode, it selects a parameter or confirms a value.
Table 8-2 - XEV22D LEDs
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 values.
In programming mode, it slides the codes
of parameters or decreases their values.
Key Combinations
Table 8-1- XEV22D Front Panel Keys and Functions
Keys and Functions
Front Panel • 9
9
User Interface
9.1. To See the Read-Only
Values
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. 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 timeout 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 seconds 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 value.
3. Press SET to store the new value.
9.4. To Enter Pr1
Parameters List
To enter in Pr1 level menu:
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 arrow keys.
9.6. To Modify the
Parameters Value
To change the parameter’s value operate as follows:
1. Enter the programming mode by pressing the SET
and 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 value.
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.
1. Press the SET + DOWN arrow keys for about 3 seconds.
10 • XEV22D I&O Manual
NOTE: The set value is stored even when the
time-out expires and ends the procedure.
026-1206 Rev 3 13-DEC-2012
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.
NOTE: If a time-out occurs while setting the
password (PR2 flashes), press SET to resume
entering the password.
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.
How to Assign a MODBUS Address
User Interface • 11
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 functioning 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 stopping 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-initialized.
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-initialized. The controller performs this procedure automatically and restarts its normal functioning when the programming mode ends.
Table 10-1 - List of Parameters
12 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
Code
Description
Function
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-initialized. The controller performs this procedure automatically and restarts 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 percentage. 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.
Table 10-1 - List of Parameters
How to Assign a MODBUS Address
Parameters • 13
Code
Description
rS
Band offset
(-12.0 to 12.0°C / -21to21°F)
PI band offset. It moves the proportional band of the PI. With
rS = 0, the band is between Set
to Set + Pb.
InC
Integration time
Function
(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 signal comes from another XEV module.
LPP
Enable pressure probe sending
in LAN
(n to 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 parameter).
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 parameter).
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 regulation
(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.
Table 10-1 - List of Parameters
14 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
Code
Description
Function
tdA
Type of alarm signaled 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 activated.
LPL
Lower pressure limit for superheat regulation
(PA4 to P20 bar/ psi)
When the suction pressure comes down to LPL, the regulation is performed with a LPL fixed value for pressure; when the pressure comes
back to LPL, the normal pressure value is used. (related to PrM parameter).
MOP
Maximum operating pressure
threshold
(PA4 to P20 bar/ psi)
If the suction pressure exceeds the maximum operating pressure value,
the controller signals a condition with a High Pressure alarm LED (related to PrM parameter).
LOP
Lowest operating pressure
(PA4 to P20 bar/ psi)
If the suction pressure comes down to this value, a low pressure alarm is
signaled with Low Pressure alarm LED (related to PrM parameter).
PHY
Pressure alarm hysteresis
(0.1 to 5.0 bar/ 1 to 72 PSI)
Alarm hysteresis to disable alarm signaling.
dML
delta MOP-LOP
(0 to 100%)
When a MOP alarm occurs, the valve will close at the dML percentage
every one second until the MOP alarm is active. When LOP occurs, the
valve will open at the dML percentage every one second until LOP
alarm is active.
MSH
Maximum superheat alarm
(LSH to 32.0°C/ LSH to 176°F)
When the superheat exceeds this value, a high superheat alarm is signaled after interval SHd.
LSH
Lowest superheat alarm
(0.0 to MSH°C/ 32 to MSH°F)
When the superheat goes down to this value, a low superheat alarm is
signaled after interval SHd.
SHy
Superheat alarm hysteresis
(0.0 to 25.5°C/ 1 to 77°F)
Hysteresis for superheat alarm deactivation.
SHd
Superheat alarm activation delay
(0 to 255 sec)
When a superheat alarm occurs, the time SHd has to pass before signaling alarm.
FrC
Fast-recovery constant
(0 to 100 sec)
Increases the integral time when SH is below the setpoint. If FrC = 0,
fast-recovery function is disabled.
DISPLAY
Lod
Local display
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 to °F)
°C = Celsius degree; °F = Fahrenheit degree
CAUTION! By changing the measurement unit, the regulation parameters have to be changed correctly.
PMU
Pressure measurement units
(bAr, PSI)
bAr = bar; PSI = psi
CAUTION! By changing the measurement unit, the regulation parameters have to be changed correctly.
Resolution (only °C)
(dE to in)
Whether a whole number or decimal point is used in temperature reading
rES
Table 10-1 - List of Parameters
How to Assign a MODBUS Address
Parameters • 15
Code
Description
Function
PrM
Pressure visualization mode
(rEL to AbS)
rEL = relative pressure; AbS = absolute pressure
All pressure parameters depend on this parameter.
CLP
Cooling percentage
(Read only)
Displays 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)
Shows the temperature probe value from P1.
PPr
Pressure probe value
(Read only)
Shows the pressure probe value. The value depends on PrM.
tP2
Temperature from P2
Shows the temperature obtained from conversion of pressure value.
OPP
Opening percentage
Shows the actual opening percentage of the valve.
d1S
Free of voltage digital input
state
(Read only)
Shows the free of voltage digital input.
d2S
High voltage digital input state
(Read only)
Shows the high voltage digital input state.
Adr
RS485 serial address
(1 to 247)
Identifies the controller address when connected to a MODBUS compatible monitoring system.
Mod
MODBUS
(AdU to StD)
AdU = (Only for XWEB systems) In this case, the XEV and the thermostatic controller are considered standalone controller (it requires a custom library for XWEB); StD = to use XEV in standalone mode, in this
case normal MODBUS-RTU protocol is used.
Ptb
Parameters map
(Read only)
It identifies the parameters map written by factory.
rEL
Release firmware
(Read only)
It shows the firmware release.
Pr2
Second level menu
Table 10-1 - List of Parameters
16 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
11 Digital Inputs
The XEV22D comes with two (2) digital inputs: a
voltage-free input and a high voltage input; both can
be configured as cooling call. In this way the cooling
signal can come from the controllers with direct load
outputs or via the controllers with voltage-free outputs. One of these inputs must be configured as the
cooling call.
13.1. Probes
The recommended temperature probe placement is
illustrated in Figure 13-1, between 0 and 180 degrees
of inclination with respect to the horizontal pipe section. For suction pressure probes, there is no particular recommendation.
12 Forced Opening
If necessary, change the FOP parameter to force
the valve to open. For example, if FOP is set to 50
(FOP = 50), the valve will be opened at half of full
scale. To disable this function, set the FOP to default
value (FOP = not used). The valve opening is enabled only when CCL digital input is enabled.
Figure 13-1 - Recommended Temperature Probe Placement
13 Electrical
Connections
All models can be connected to the monitoring and
supervising system XWEB3000. If Mod = StD, the
standard MODBUS-RTU protocol is used; if Mod =
AdU, the custom XWEB library is required. This last
configuration makes it possible to use the same serial
address of the thermostat that gives the cooling request to XEV. In this way, it is possible to reduce the
number of addresses used.
The controller comes with a screw terminal block
to connect cables with a cross section up to 2.5 mm2.
Heat-resistant cables have to be used. Before connecting the cables, verify that the power supply complies
with the controller’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.
Probes
14 RS485 Serial Line
Digital Inputs • 17
15 How to Use the
Hot Key
NOTE: The Err message is displayed in case
an error or failure in programming occurs. In
this case, turn the unit OFF and then ON if
you want to restart the download or remove the
Hot Key to abort the operation.
15.1. How to Program a Hot
Key From the
Controller (Upload)
1. Program one controller using the front keypad.
2. When the controller is ON, insert the Hot Key and
press the UP arrow key; the uPL message will appear followed by a flashing End LED.
3. Push the SET key and the End LED will stop flashing.
4. Turn OFF the controller, remove the Hot Key, then
turn it ON again.
NOTE: The Err message is displayed in case
an error or failure in programming occurs. In
this case, push the UP arrow key again if you
want to restart the upload or remove the Hot
Key to abort the operation.
15.2. How to Program the
Controller Using a Hot
Key (Download)
1. Turn OFF the controller.
2. Insert a programmed Hot Key into the 5-pin connector and then turn the controller ON.
3. Automatically the parameter list of the Hot Key is
downloaded into the controller memory, the doL
message will blink followed by a flashing End
LED.
4. After 10 seconds, the controller will restart work
with the new parameters.
5. Remove the Hot Key.
18 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
16 Display Messages
Message
Cause
Outputs
nA
None of the 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
16.1. Alarm Recovery
Probe alarms P1 and P2 start a few seconds after
the fault in the probe; they automatically stop few seconds after the probe restarts normal operation. Check
the connections before replacing the probe. Maximum and minimum alarms HSH, LSH, MoP, and
LoP automatically stop as soon as the variable returns
to normal values.
The controller is provided with an internal check
to verify memory integrity. Alarm EE flashes when a
failure in the internal memory is detected. In this case,
call for service.
Table 16-1 - Alarm Signals
Alarm Recovery
Display Messages • 19
17 Specifications
Housing
Self extinguishing ABS
Dimensions
Case:
Front: 4 DIN modules, 70 mm x 135 mm with male and female connectors
Depth: 60 mm
Mounting:
DIN RAIL mounted in a omega (3) din rail
Protection
IP20
Connections
Detachable screw terminal block ≤ 2.5 mm2 wiring
Power Supply
24VAC/DC ±10%
Power Absorption
(depending on the valve)
20VA max
Display
Three (3) digits with icons, red LEDs, height 14.2 mm
Inputs
1 temperature probe Pt1000 or NTC
1 pressure transducer 4 to 20mA or 0 to 5V
Digital Inputs
1 free of voltage
1 at high voltage
Outputs for Valve
Bipolar or unipolar valves
Data Storage
On the non-volatile memory (EEPROM)
Kind of Action
1B
Pollution Grade
Normal
Software Class
A
Temperature
Operating: 0 to 60°C
Storage: -25 to 60 °C
Relative
Humidity
20 to 85% (no condensing)
Resolution
0.1°C or 1°F
Precision at 25°C
±0.7°C ±1 digit
Table 17-1 - XEV22D Specifications
20 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
18 E2 MODBUS Network Wiring
• Connect MODBUS Network to the RS485 Connector on the E2 PIB board (Belden 8641 recommended).
• Note to wire the RS485 +/- polarity at the E2 in the reverse of the XEV22D devices.
• Position the three termination jumpers to the UP (terminated) position to provide RS485 termination at the E2.
• Do not connect the shield of the MODBUS network to the E2 PIB center terminal. Instead, use a 100 ohm 1/2 watt
resistor to connect the MODBUS cable shield to earth ground.
• At each XEV22D device, wire the MODBUS cable to the RS485 +/- terminals and connect the MODBUS shield to
the pin 16 terminal.
• Terminate the end of the MODBUS network at the last XEV22D device on the daisy chain with the MODBUS termination block (P/N 535-2711), or by connecting a 150 ohm resistor between the MODBUS +/- terminals.
Figure 18-1 - XEV22D to E2 Wiring Diagram (E2 PIB version 3.xx and below shown in this example)
CAUTION! For the XR, XM, and XEV series of controllers, the shield wire must not come into contact with
any other wire or ground source. If contact with other wires or devices does occur, the 485 MODBUS network will malfunction or connected devices will be damaged. This applies to all installations where the
shield is tied to ground through a 100 ohm ½ Watt resistor.
Alarm Recovery
E2 MODBUS Network Wiring • 21
19 ECT MODBUS
Networking to
E2s
19.1. COM Port Associations
- E2 Versions 3.xx and
Below
Connect the MODBUS network cable to the threeterminal connector on the COM port you wish to assign as MODBUS. Reverse polarity of +/- on RS485
cable from E2 to the device.
Figure 19-2 - MODBUS Networking
COM ports can only be used for one function; in
other words, if COM2 is set up as the I/O network,
you cannot connect MODBUS devices to COM2. Ensure your E2 is equipped with an RS485 COM Card
(P/N 637-4890) and configured in E2 General Services (, Serial tab) to enable COM4 or an
E2 Expansion COM Card (P/N 637-4871) to enable
COM6.
Connect the MODBUS network cable to the threeterminal connector on the COM port you wish to assign as MODBUS. Reverse polarity of +/- on RS485
cable from E2 to the device.
Figure 19-1 - Location of E2 COM Ports (E2 Versions 3.xx and
Below)
Connecting an XEV22D controller to an E2 requires the E2 to be version 2.84 or above. Contact Retail Solutions for upgrade information if the controller
is a version before 2.84.
An E2 has up to three COM ports that can be assigned for MODBUS communication: COM2, an
RS485 port on the E2 power interface board, and
COM4 and COM6, which are optional ports requiring
expansion cards. COM4 is recommended for MODBUS connection of Emerson units.
22 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
19.2. COM Port Associations
- E2 Versions 4.2 and
Above
3. Press + to open the Serial tab of the General
Controller Info setup screens:
Figure 19-4 - Serial Communications Manager Screen
4. This screen will have a “Connection” field for all
COM ports on the E2. Highlight the COM port connection field that will be used for the device, and
press  - LOOK UP. From the list of network
types, select MODBUS.
5. Four fields will become visible underneath the
COM port connection field, which pertain to the
way the device communicates:
Figure 19-3 - Location of E2 COM Ports - E2 PIB Board (E2
version 4.2 and above)
An E2 has three COM ports that can be assigned
for MODBUS communication (COM2). COM ports
can only be used for one function; in other words, if
COM2 is set up as the I/O network, you cannot connect MODBUS devices to COM2. Ensure your E2 is
configured in E2 General Services (,
Serial tab) to enable COM4 or COM6.
19.3. E2 Setup of Devices
19.3.1.Set Up Network Ports
Before setting up device, the port on the E2 that
has the MODBUS cable connected must be set up as
a MODBUS port.
• Baud - Default setting is 19.2k. The baud rate
setting should be set to match the baud rate of
the device (9600). (All devices connected to the
same COM port should be set to the same baud
rate.)
• Data Size - Leave this field at the default value
(8).
• Parity - Leave this field at the default value
(None).
• Stop Bits - Leave this field at the default value
(1).
6. Press  to save changes and exit.
19.3.2.Add and Connect the Device
To enable communications between E2 and the
units, the devices must be added and addressed in E2.
1. Log in to the E2 with Level 4 access.
2. Press  - Connected I/O Boards
1. Log in to the E2 with Level 4 access.
2. Press  followed by  - General
Controller Info.
COM Port Associations - E2 Versions 4.2 and Above
ECT MODBUS Networking to E2s • 23
and Controllers.
through the front display, and press  to select
it. A window will open where you can specify the
address of the controller. If a network ID has already been selected, its name will be shown next to
the network ID in this list. If the network ID you are
trying to assign has already been used, you must set
the address on this device to a different number that
is not being used.
Figure 19-5 - Num Network Ctrls: NetSetup Screen
3. In the Num Network Ctrls: NetSetup screen, under
the ECT tab, enter the number of devices in the
Quantity field. (Max shows the maximum number
of devices allowed on the network.)
4. Press  to return to the Network Setup menu,
then select  - Network Summary.
5. Locate the units you added to the network list (press
 and  to scroll through the list). If desired, enter a new name for each device in the Name field.
Figure 19-7 - List of MODBUS Devices
7. Repeat Steps 5 and 6 until each device has a name
and address.
8. When finished, press  to return to the Net-
work Setup menu, then press  - Network Summary (Figure 19-8). Locate the devices you set up,
and look at each device’s status in the Status field.
You will see one of the following messages:
Figure 19-6 - Network Summary Screen
6. By default, each device in the network list has a
board number of 0. To set the address and begin
communication, choose the device and press
. In the list of MODBUS devices, choose the
address number corresponding to the address set up
24 • XEV22D I&O Manual
• Online - The device is communicating normally.
• Offline - The device is not communicating, has
not been commissioned, is not functional, or is
not powered up. Verify the device is powered
up, wired correctly, and has the proper network
address, baud rate, and parity.
• Unknown - The device is not communicating or
has not been commissioned. Verify the device
is powered up, wired correctly, and has the
proper network address, baud rate, and parity.
• No Port - No port is set up in the E2 Serial Configuration Manager to be a MODBUS port.
• Wrong FW Rev - This message is likely caused
by the device having a firmware version older
than the minimum revision required by E2 for
communication. Replace the device with a new
one or a device that has the latest version of
026-1206 Rev 3 13-DEC-2012
firmware on it.
19.5. MODBUS Termination
Blocks
Because the XEV22D device has no on-board
means of termination, use the MODBUS termination
block (P/N 535-2711) for termination that can be
wired to the end of the cable segment using the threepin connector. Wire the two signal wires to the outside terminals, and connect the shield to pin 16, keeping the exposed shield wire length as short as possible
(3 inches ideal maximum length).
Figure 19-8 - Network Summary Screen
19.4. Wiring Types
Retail Solutions specifies Belden #8761 shielded
twisted pair cables for use as MODBUS wiring (or
Belden #82761 and Belden #88761 for plenum installations).
For MODBUS network wiring of XEV series of
controllers to E2, Belden #8641 (P/N 135-8641) is the
recommended wire type to use.
Figure 19-9 - MODBUS Termination Block (P/N 535-2711)
If the recommended cable is not available in your
area, be sure the wiring meets or exceeds the following specs:
Shielded?
Yes
Conductor Type
Twisted Pair
Gauge
18 - 24 AWG
Capacitance between
signal wires
31 pF/ft or less
(9.45 m) or less
Capacitance between
signal and shield
59 pF/ft or less
(17.98 m) or less
Maximum Length
4000 ft/18 to 22 AWG
(1219.2 m)
2500 ft/24 AWG
(762 m)
Nominal Impedance
120±50
The maximum distance between an XEV22 controller and a valve must not exceed 10 meters (32
feet). Use only shielded cables with a cross section
greater than or equal to 0.325 mm2 (AWG22).
Wiring Types
ECT MODBUS Networking to E2s • 25
20 Standard Values
NOTE: For viewing and adjusting setpoints, refer to: Section 9.2., To See the Setpoint and Section 9.3., To
Modify the Setpoint.
Label
Description
Range
Default
Level
R22, 134, 404, 407, 410, 507, CO2
404
Pr2
0 to 100%
50
Pr2
0 to 239 sec - On
On
Pr2
Fty
Kind of gas
PEo
Probe error opening percentage
PEd
Probe error delay before stopping regulation
tEU
Type of stepper motor
uP – bP
bP
Pr2
tEP
Automatic valve configuration
0 to 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 to 600 step/s
See tEP
Pr2
CPP
Current per phase (only bipolar valves)
0 to 100 * 10mA
See tEP
Pr2
CHd
Holding current per phase (only bipolar valves)
0 to 100 * 10mA
See tEP
Pr2
oPE
Start opening percentage
0 to 100%
85
Pr2
SFd
Start function duration
0.0 to 42.0 min: tens of seconds
1.3
Pr2
Sti
Stop regulation interval
0.0 to 24.0 hr: tens of minutes
0
Pr2
Std
Stop duration
0 to 60 min
0
Pr2
MnF
Maximum opening percentage
0 to 100%
100
Pr2
FOP
Forced opening time-out
0 to 100% - not used
not used
Pr2
0.1 to 50.0°C/ 1 to 90°F
10.0
Pr2
-12.0 to 12.0°C/ -21 to 21°F
0.0
Pr2
0 to 255 sec
120
Pr2
420 - 5V- LAn
420
Pr2
n to Y
n
Pr2
PI PARAMETERS (For trained staff use only)
Pb
Proportional band
rS
Band offset
inC
Integration time
PROBE PARAMETERS
tPP
Type of pressure transducer
LPP
Enable pressure probe sending in LAN
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 to 50.0 bar/ 725 PSI
11.0
Pr2
OPr
Pressure probe calibration
-12.0 to 12.0 bar/ -174 to 174 psi
0
Pr2
ttE
Type of temperature probe
PtM to ntC
PtM
Pr2
otE
Temperature probe calibration
-12.0 to 12.0°C/ -21 to 21°F
0
Pr2
DIGITAL INPUTS
Table 20-1 - XEV22D Standard Parameter Values
26 • XEV22D I&O Manual
026-1206 Rev 3 13-DEC-2012
Label
Description
Range
Default
Level
CL – OP
CL
Pr2
0 to 255 min
0
Pr2
i1P
Free of voltage digital input polarity
d1d
Digital input 1 (free of voltage) activation delay
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 to 255 min
0
Pr2
0.0 to 42.0 min: tens of seconds
10.0
Pr2
ALL, SH, PrE, di
ALL
Pr2
ALARMS
dAo
Alarm delay after restarting regulation
tdA
Type of alarm signaled by relay
LPL
Lower pressure limit for superheat regulation
(related to PrM parameter)
PA4 to P20 bar/ PSI
-0.5
Pr2
MOP
Maximum operating pressure threshold
(related to PrM parameter)
PA4 to P20 bar/ PSI
11.0
Pr2
LOP
Minimum suction pressure limit
(related to PrM parameter)
PA4 to P20 bar/ PSI
-0.5
Pr2
PHY
Pressure alarm hysteresis
0.1 to 5.0 bar/ 1to 72 PSI
0.1
Pr2
dML
delta MOP-LOP
0 to 100%
30
Pr2
MSH
Maximum superheat alarm
LSH to 32.0 °C/ LSH to 176 °F
80.0
Pr1
LSH
Lowest superheat alarm
0.0 to MSH°C/ 32 to MSH°F
2.5
Pr1
SHy
Superheat hysteresis
0.1 to 25.5°C/ 1 to 77°F
0.1
Pr2
SHd
Superheat alarm activation delay
0 to 255 sec
120
Pr1
FrC
Fast-recovery constant
0 to 100 sec
50
Pr2
SH - PEr – P1 - P2
SH
Pr1
°C - °F
°C
Pr2
bAr – PSI
bAr
Pr2
dE – in
dE
Pr2
DISPLAY
Lod
Local display
CF
Temperature measurement units
PMU
Pressure measurement unit
rES
Resolution (only °C)
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
Actual 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 to 247
1
Pr2
Mod
MODBUS type
StD – AdU
StD
Pr2
Ptb
Parameters map
---
---
Pr2
rEL
Release software
---
---
Pr2
Pr2
Second level menu
---
---
Pr1
Table 20-1 - XEV22D Standard Parameter Values
MODBUS Termination Blocks
Standard Values • 27
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