EVD
4
Driver for electronic expansion valve
User manual
User manual
4
We wish to save you time and money!
We can assure you that the thorough reading
of this manual will guarantee correct
installation and safe use of the product
described.
INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND ELECTRONIC
EQUIPMENT (WEEE)
In reference to European Community directive 2002/96/EC issued on 27 January 2003 and the related
national legislation, please note that:
1. WEEE cannot be disposed of as municipal waste and such waste must be collected and disposed of
separately;
2. the public or private waste collection systems defi ned by local legislation must be used. In addition,
the equipment can be returned to the distributor at the end of its working life when buying new
equipment.
3. the equipment may contain hazardous substances: the improper use or incorrect disposal of such
may have negative effects on human health and on the environment;
4. the symbol (crossed-out wheeled bin) shown on the product or on the packaging and on the
instruction sheet indicates that the equipment has been introduced onto the market after 13 August
2005 and that it must be disposed of separately;
5. in the event of illegal disposal of electrical and electronic waste, the penalties are specifi ed by local
waste disposal legislation.
IMPORTANT WARNINGS
CAREL bases the development of its products on several years’ experience in the HVAC fi eld, on
continuous investment in technological innovation of the product, on rigorous quality procedures and
processes with in-circuit and function tests on 100% of its production, on the most innovative production
technologies available on the market. CAREL and its branch offi ces/affi liates do not guarantee, in any
case, that all the aspects of the product and the software included in the product will respond to the
demands of the fi nal application, even if the product is built according to state-of-the-art techniques.
The client (builder, developer or installer of the fi nal equipment) assumes every responsibility and risk
relating to the confi guration of the product in order to reach the expected results in relation to the
specifi c fi nal installation and/or equipment. CAREL in this case, through specifi c agreements, can
intervene as consultant for the positive result of the fi nal start-up machine/application, but in no case
can it be held responsible for the positive working of the fi nal equipment/apparatus.
The CAREL product is a state-of-the-art product, whose operation is specifi ed in the technical
documentation supplied with the product or can be downloaded, even prior to purchase, from the
website www.carel.com.
Each CAREL product, in relation to its advanced technological level, needs a phase of defi nition/
confi guration / programming / commissioning so that it can function at its best for the specifi c
application. The lack of such phase of study, as indicated in the manual, can cause the fi nal product to
malfunction of which CAREL can not be held responsible.
Only qualifi ed personnel can install or carry out technical assistance interventions on the product.
The fi nal client must use the product only in the manner described in the documentation related to the
product itself.
Without excluding proper compliance with further warnings present in the manual, it is stressed that in
any case it is necessary, for each Product of CAREL:
• To avoid getting the electrical circuits wet. Rain, humidity and all types of liquids or condensation
contain corrosive mineral substances that can damage the electrical circuits. In any case, the product
should be used and stored in environments that respect the range of temperature and humidity
specifi ed in the manual.
• Do not install the device in a particularly hot environment. Temperatures that are too high can
shorten the duration of the electronic devices, damaging them and distorting or melting the parts in
plastic. In any case, the product should be used and stored in environments that respect the range of
temperature and humidity specifi ed in the manual.
• Do not try to open the device in any way different than that indicated in the manual.
• Do not drop, hit or shake the device, because the internal circuits and mechanisms could suffer
irreparable damage.
• Do not use corrosive chemical products, aggressive solvents or detergents to clean the device.
• Do not use the product in application environments different than those specifi ed in the technical manual.
All the above reported suggestions are valid also for the control, serial unit, programming key or nevertheless for any other accessory in the product portfolio of CAREL. CAREL adopts a policy of continuous
development. Therefore, CAREL reserves the right to carry out modifi cations and improvements on any
product described in the present document without prior notice. The technical data in the manual can
undergo modifi cations without obligation to notice. The liability of CAREL in relation to its own product
is regulated by CAREL’s general contract conditions edited on the website www.carel.com and/or by
specifi c agreements with clients; in particular, within the criteria consented by the applicable norm, in no
way will CAREL, its employees or its branch offi ces/affi liates be responsible for possible lack of earnings
or sales, loss of data and information, cost of substitute goods or services, damage to things or persons,
work interruptions, or possible direct, indirect, incidental, patrimonial, of coverage, punitive, special or
consequential in any way caused damages, be they contractual, out-of-contract, or due to negligence or
other responsibility originating from the installation, use or inability of use of the product, even if CAREL
or its branch offi ces/affi liates have been warned of the possibility of damage.
5
Content
1. INTRODUCTION 7
1.1 Codes and accessories ..........................................................................................................................7
1.2 Connecting to the main serial port ....................................................................................................8
1.3 Operation of the service serial port ...................................................................................................8
1.4 Setting the network address ................................................................................................................8
2.1 Power supply, sensors, digital I/O .....................................................................................................9
2.2 Main serial port for connection to tLAN/pLAN/RS485 (supervisor /
Modbus®) .......... 9
2.3 Stepper motorr ......................................................................................................................................9
2. INPUTS AND OUTPUTS 9
2.4 Relay .........................................................................................................................................................10
2.5 Service serial port ..................................................................................................................................10
3.1 Application with µC
2
and µC2 SE (EVD000*40* and EVD000*43*) via tLAN ..........................11
3. EVD4 APPLICATIONS: CONNECTIONS, LIST OF PARAMETERS AND OPERATING
MODES 11
3.2 Application with pCO (EVD000*40* and EVD000*43*) via tLAN ...................................................14
3.3 Application as positioner (EVD000*40* and EVD000*43*) .......................................................17
3.4 Application with pCO (EVD000041* and EVD000044*) via pLAN .......................................................19
3.5 Application with supervisor (EVD000*42* and EVD000*45*) via RS485................................22
3.6 Application with Modbus® protocoll (EVD0001460) via RS485 ......................................24
4. TECHNICAL AND CONSTRUCTIONAL SPECIFICATIONS 30
5. TROUBLESHOOTING 31
APPENDIX I. INSTALLING AND USING THE EVD4-UI PROGRAM 32
I.I Installation .................................................................................................................................................32
I.II Preparing the connections....................................................................................................................32
I.III Preparing the user interface ...............................................................................................................32
I.IV Saving the data ......................................................................................................................................32
I.V Loading the data .....................................................................................................................................33
I.VI Modifying the parameters ...................................................................................................................33
I.VII Confi gurations available .....................................................................................................................33
APPENDIX II. DESCRIPTION OF THE PARAMETERS 34
APPENDIX III. PARAMETER SETTINGS 40
APPENDIX IV. SUMMARY OF PID CONTROL 41
IV.I Symbols used .........................................................................................................................................41
IV.II Pid control law ......................................................................................................................................41
IV.III Proportional action .............................................................................................................................41
IV.IV Integral action ......................................................................................................................................42
IV.V Derivative action...................................................................................................................................43
6
7
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
1. INTRODUCTION
EVD4 is an evolved PID controller complete with driver for stepper motors specially designed for the management of electronic expansion valves in refrigerant circuits. It features sophisticated control functions
and can be used in many operating confi gurations in refrigeration and air-conditioning systems, such as:
- PID control of superheat with protection and safety compensation functions;
- PID control on one measurement (pressure or temperature);
- positioner for electronic expansion valves controlled by 4 to 20 mA or 0 to 10 Volt signal.
The device is confi gured and the address set via serial interface and the user interface software is stored
in non-volatile memory.
1.1 Codes and accessories
Code Description
EVD000040*
Controller with tLAN serial already confi gured for operation with µC2 and µC2 SE (address 2) universal for EEV1 valves
EVD000041*
Controller with RS485 serial already confi gured for operation with pCO in pLAN (address 30) universal for EEV1 valves
EVD000042*
Controller with RS485 serial already confi gured for operation with supervisor (address 250) universal for EEV1 valves
EVD000043*
Controller with tLAN serial already confi gured for operation with µChiller (address 2) for CAREL valves
EVD000044*
Controller with RS485 serial already confi gured for operation with pCO via pLAN (address 30) for CAREL valves
EVD000045*
Controller with RS485 serial already confi gured for operation with supervisor (address 250) for CAREL valves
EVD00014** EEV valve controller with spade connector
(3)
EVD0001460 Controller with RS485 serial already confi gured for operation with Modbus®
EVD00004*1
Multiple packages of 10 pcs, without connectors
EVBAT00200
Battery charger module and step-up transformer for backup power supply
EVBAT00300
System made up of EVBAT00200 + 12 V 1.2 Ah battery + cable and connectors
EVBATBOX10
Metal battery case
CVSTDUTTL0
USB converter to connect a PC to the service serial port
CVSTD0TTL0
RS232 converter to connect a PC to the service serial port
EVDCAB0500
Package of 14 cables with terminals for MINIFIT connector, length 5 m, cross-section 1 mm
2
EVDCON0001
Packaging of connectors for 10 EVD4 for multiple packages of 10 pcs
(1)
: See the table on the corresponding instruction sheet or APPENDIX II “DESCRIPTION OF THE
PARAMETERS”, “valve type” parameter
(2)
: For the other types of probes, see Chap. 4 “Technical and constructional characteristics”
(3)
: The EVD00014** series with spade and 4-pin connector on the valve side improves performance in terms of
electromagnetic emissions if used with shielded cable and the shield is connected to the spade.
RT–RT+GNX
NOCOM
G Vbat DI1 S4 V S3 S2 S1
G0 GN D DI2 S4 I Vr1 Vr2 OC
3 4
1 2
NTC: low temperature
probes
CVSTDUTTL0: converter
E2V*: CAREL electronic expansion
valve
EVDCON0001:
10 connector kits
solenoid
valve
alarm
signal
EVDCON0001:
10 connector kits
personal computer for configuration
0 to 10 V
Probe1
Signal4
SPKT: 0 to 5 V ratiometric
probes
External controller
Probes
(2)
Important
Probe3
4 to 20 mA
1
digital input
EVBAT00200
EVBAT00300
battery modules
MC2*: µC
2
controller
PlantVisor for
configuration
PCO*: programmable controllers
PCO*: programmable controllers
S
pGD
1
user interface
pGD
1
user interface
RS485
voltage-free relay output
for utilities up to 230 Vac
NB: DANFOSS, SPORLAN and ALCO
electronic expansion valves can be
connected
EVDCAB0500:
14 pre-crimped cables
EVD4
PC
EVD4 service USB adapter
EEV driver
4
3
4
1
2
Faston connector electronic valve
(Cod. EVD00014**)
EVD****40* and EVD****43*:
tLAN version
EVD****41* and EVD****44*:
pLAN version
EVD****42* and EVD****45*:
RS485 version
EVD***1460:
Modbus
version
pGD
1
user interface
PCO*: programmable controllers
Modbus
Fig. 1.0
8
pGD
1
user interface
EV driver
E2V
TP
EV dri ver
E2V
TP
Master control
Supervisor (CAREL o Modbus)
Fig. 1.1
Fig. 1.2
Fig. 1.3
pGD
1
user interface
EV driver
E2V
TP
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
1.2 Connecting to the main serial port
EVD4 can operate independently (stand alone), connected to a supervisor to control the fundamental
parameters, or connected to the LAN with other CAREL controllers, according to the following diagrams:
1.2.1 TLAN connection with µC2 or µC2 SE or pCO (codes EVD000*40* and EVD000*43*)
Fig. 1.1.
1.2.2 pLAN connection with pCO (codes EVD000*41* and EVD000*44*)
Fig. 1.2.
1.2.3 Stand alone in the RS485 network with CAREL supervisor (codes EVD000*42* and
EVD000*45*) or with Modbus® supervisor (code EVD0001460)
Fig. 1.3.
1.3 Operation of the service serial port
The service serial port (par. 2.5) is used to access all the EVD4 parameters even when the instrument is
already installed and operating; to do this, the special converter is required (CVSTDUTTL0 or CVSTD0TTL0),
plus a PC with USB or RS232 serial port. “APPENDIX I - Installing and using the EVD4-UI program” describes
the installation and operation of the EVD4_UI software that is used to confi gure the controller.
The converter can power the logical section of the EVD4 (but not the expansion valve), and therefore this
can be confi gured from the PC without having to connect the instrument to the 24 Vac power supply.
1.4 Setting the network address
The EVD4 operating parameters, including the network address, reside on the EEPROM; to modify the values, access the service serial port using the EVD4-UI software: connect the special converter (CVSTDUTTL0
or CVSTD0TTL0) to the service serial port (Fig. 2.8) and a PC with USB or RS232 serial port, then start the
“EVD4_U Key” connection, as described in “APPENDIX I - Installing and using the EVD4-UI Address” and set
the Net address parameter; in the box at the top right of the interface, the “Network address” item will show
the new value of the address, after having pressed the “READ” button. If not changed by the user, the Net
address parameter will have the following default values:
Net address
EVD000*40* and EVD000*43* 2
EVD000*41* and EVD000*44* 30
EVD000*42* and EVD000*45* 32
EVD0001460 1
Below is a description of the connectors supplied with the EVD000*4*0 or purchased in separately in
the EVDCON0001 kit for EVD000*4*1. The drawings represent the connectors as seen after having been
fi tted on the EVD
4
.
Note: if the address is changed using the pLAN or Modbus
®, protocol, the “Network address” item is
updated after switching the device off and on again.
9
MOLEX® MiniFit 538-39-01-2060
4
3
2
1
GND
MOLEX® Mini-Fit 538-39-01-2140
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
Fig. 2.1
Fig. 2.4
GNX
RT+
RT-
PHOENIX® MC1,5/3-ST-3,81
Fig. 2.3
21
43
MOLEX® MiniFit 538-39-01-2060
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Below is a description of the connectors supplied with the EVD00004*0 or purchased in separate
packages (EVD400CON0 for the
EVD00004*1). The drawings represent the connectors as seen after
having been fi tted on the EVD
4
.
2.1 Power supply, sensors, digital I/O
The main 14-pin MINIFIT® connector is used to connect the main and auxiliary power supply (if the
EVBAT00200/300 module is fi tted), as well as the sensors, digital inputs and transistor output.
This connector accepts wires with cross-section up to 1 mm
2
with MOLEX® 5556-T barrel.
A kit of pre-crimped 14 x 1 mm
2
cables, length 5 m, is available for purchase (EVDCAB0500).
line Function
G, G0 24 Vac power supply
GND Earth for all signals, in electrical contact with GND and the GNX terminal on the main serial
connector
Vbat Emergency power supply generated by the EVBAT00200 module
DI1, DI2 Digital inputs to be activated by voltage-free contact or transistor to GND, 5 V no-load and 5
mA short-circuited
Vr1, Vr2 5 V references used as power supply to the ratiometric probes
S1 Analogue input for ratiometric probe or NTC low temperature probe
S2 Analogue input for ratiometric probe, NTC high temperature probe or Pt1000
S3 Analogue input for ratiometric probe or NTC low temperature probe
S4I Analogue input for 4 to 20 mA signal
S4V Analogue input for 0 to 10 Volt signal
OC Open-collector transistor output, for up to 100 mA
Table 2.1
For the power supply in particular, observe the diagram shown:
2.2 Main serial port for connection to tLAN/pLAN/RS485 (supervisor / Modbus®)
Removable terminal for connection to the MASTER unit (µChiller, pCO) or the supervisor (PlantVisor).
line Function
GNX Signal earth, in electrical contact with GND on the I/O connector
RT+ + signal for the RS485 connection (pLAN, supervisor, Modbus®) or DATA signal for the tLAN
connection
RT– v signal for the RS485 connection (pLAN, supervisor, Modbus®)
Table 2.2
2.3 Stepper motorr
6-pin MINIFIT® connector. Accepts cables up to 1 mm2 with MOLEX® 5556-T barrel.
Line Function
GND Earth electrically connected to GND on the I/O connector, and with the earth connector on the
electrical panel
1 + Phase A
2 + Phase B
3 – Phase A
4 – Phase B
Table 2.3
2. INPUTS AND OUTPUTS
G Vbat DI1
S4V
S3 S2 S1
G0
GND
DI2
S4I
Vr1 Vr2 OC
EVD
4
G
B- B+
G0
OUT GND
4 A T
power supply module
EVD
12 V
1,2 Ah
0,8 A T
0,8 A T
24 Vac230 Vac
optional backup
EVBAT00200/300
do not connect if EVBAT* is fitted
Fig. 2.2
for code EVD00014**
for code EVD00004**
10
NO
COM
relay
PHOENIX® GMSTB 2,5/2 ST
Fig. 2.6
Fig. 2.7
USB
convertitore /
converter
CVSTDUTTL0
A
GNX
RT+
RT-
B
Fig. 2.8
Fig. 2.5
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
2.4 Relay
Plug-in terminal
line Function
COM Common
NO Normally open contact, 5 A 250 Vac resistive load; 2 A 250 Vac, inductive load (PF= 0.4)
2.5 Service serial port
Allows access to the functions of the EVD4; via PC. To access this connector:
1) Remove the cover by levering it with a screwdriver on the central notch (Fig. 2.7).
2) Locate the white 4-pin connector and insert the special converter cable (Fig. 2.8).
Connect the USB cable to the PC; if the EVD
4
is not powered by the 24 Vac line, it will take its power
supply from the serial converter.
Once the supervisor has been connected, start an application with the supervisor protocol at 4800 baud
on network address 1, for example via EVD4_UI (see APPENDIX I).
This serial port can be connected and disconnected without needing to remove the USB cable from
the PC.
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
3
4
1
2
Green
Yellow
Brown
White
Green
Black
Red
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00014**
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
1
2
3
4
Green
Black
Red
White
Green
Yellow
Brown
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00004**
11
Fig. 3.1
GNX
RT+
RT-
PHOENIX® MC1,5/3-ST-3,81
USB
convertitore /
converter
CVSTDUTTL0
A
GNX
RT+
RT-
B
Fig. 3.2
G
G0
G Vbat DI1
S4V
S3 S2 S1
G0
GND
DI2
S4I
Vr1 Vr2 OC
EVD
4
0,8 A T
24 Vac
µC
2
230 Vac
Fig. 3.3
Fig. 3.4
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Below is a description of the connections, confi guration parameters, UI graphics and operating modes
of the six codes available for the EVD4 in the different applications.
3.1 Application with µC2 and µC2 SE (EVD000*40* and EVD000*43*) via
tLAN
3.1.1 Connections
Communication: with reference to Fig. 3.1, connect GNX and RT+ to the µC2 unit.
Confi guration: the EVD4-UI software is used to access the parameters; connect the converter
(CVSTDUTTL0 or CVSTD0TTL0) to the service serial port (Fig. 3.2).
Power supply: with reference to Fig. 3.3, connect G and G0 to the 24 Vac power supply side; to
connect an auxiliary battery see the EVD
4
Instruction Sheet.
Valve: with reference to Fig. 3.4, connect the valve according to the type set for the “Valve
type” parameter.
Probes: Connect the ratiometric pressure sensors and NTC temperature sensors to S1 and
S3 respectively.
For other types of probes or connections, change the value of the “EVD probes
type” parameter and see chap. 4
WARNING: if a EVD
4
unit is erroneously connected to a controller with a different communication
protocol (e.g. EVD000*40* with pCO via pLAN) and is then connected to a unit with the
same protocol (e.g. EVD000*40* with pCO or µC
2
via tLAN), the fi rst time that the EVD4 is
connected with the correct protocol it may take a few minutes to recognise the protocol; if
this waiting time seems excessive, disconnect power to the controller and the EVD
4
(including any connections via CVSTDUTTL0 or CVSTD0TTL0 converter), and then
reconnect the devices (including any connection via CVSTDUTTL0 or CVSTD0TTL0
converter) and wait a few minutes for the connection to be restored independently. In the
event of connection to µC
2
, after having reconnected the devices to the power supply,
connect the EVD
4
to a PC and activate the EVD4_UI using the “EVD4_UI MCH2”
connection, set En. reset to default = 14797, then Reset to default = Yes (the box changes
from green to red).
3. EVD
4
APPLICATIONS: CONNECTIONS, LIST OF PARAMETERS AND OPERATING MODES
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
NTC -50T105 °C
S3
NTC*WF*
Temp.
GND
ratiometric +
OUT
Vr1
SPKT*R*
Press.
GND
P
S1
Key:
A Service serial port
B Main serial port
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
1
2
3
4
Green
Black
Red
White
Green
Yellow
Brown
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00004**
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
3
4
1
2
Green
Yellow
Brown
White
Green
Black
Red
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00014**
12
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EVD4 +030220227 - rel. 2.1 - 12.06.2008
3.1.2 List of parameters
Below is the list of parameters visible on the EVD4-UI, divided into write and read; the meaning of each
parameter is described in APPENDIX II, while APPENDIX III shows a list of the values of the reference
parameters in relation to certain typical applications.
Key:
= Main parameters required to start operation;
= Secondary parameters required for optimum operation;
— = Advanced parameters.
WRITE
Mode Parameter name Description of the parameter
Mode dependent parameters (Fig. 3.5)
COOL
CH-Superheat set
superheat set point in CH mode
CH-Proportional gain
PID proportional factor in CH mode
CH-Integral time
integral time for superheat control in CH mode
CH-Low Superheat
low superheat value in CH mode
LOP Cool Mode
temperature at minimum operating pressure (MOP) in CH mode
MOP Cool Mode
temperature at maximum operating pressure (MOP) in CH mode
HEAT
HP-Superheat set
superheat set point in HP mode
HP-Proportional gain
PID proportional factor in HP mode
HP-Integral time
integral time for superheat control in HP mode
HP-Low Superheat
low superheat value in HP mode
LOP Heat Mode
temperature at minimum operating pressure (LOP) in HP mode
MOP Heat Mode
temperature at maximum operating pressure (MOP) in HP mode
DEFROST
DF-Superheat set
superheat set point in DF mode
DF-Proportional gain
PID proportional factor in DF mode
DF-Integral time
integral time for superheat control in DF mode
DF-Low Superheat
low superheat value in DF mode
LOP Defr. Mode
temperature at minimum operating pressure (LOP) in DF mode
MOP Defr. Mode
temperature at maximum operating pressure (MOP) in DF mode
COMMON
Circuit/EEV ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed
Dynamic proportional gain
attenuation coeffi cient with change in capacity
—
SHeat dead zone
dead zone for PID control —
Derivative time
PID derivative time
—
Low SHeat int. time
integral time for low superheat control —
LOP integral time
integral time for low evaporation pressure (LOP) control —
MOP integral time
integral time for high evaporation pressure (MOP) control —
Hi TCond. int. time
integral time for high condensing pressure control (HiTcond) —
Hi TCond. protection
maximum condensing temperature —
Alarms delay Low SH
low superheat alarm delay —
Alarms delay LOP
low evaporation pressure (LOP) alarm delay —
Alarms delay MOP
high evaporation pressure (MOP) alarm delay —
MOP startup delay
MOP delay time —
Alarms delay probe error
probe error alarm delay —
Global parameters (Fig. 3.5)
MODE
READ ONLY, received from µC
2
—
REGULATION
READ ONLY, received from µC
2
—
Refrigerant
number indicating the type of refrigerant used
l
EVD probes type
number indicating the combination of sensors used to calculate the superheat —
Valve type
number that defi nes the type of electronic valve used
l
EEV mode man.
enable/disable manual valve positioning —
Requested steps
required motor position in manual control
—
Open relay low SH
enable/disable relay opening following low superheat
—
Open relay MOP
enable/disable relay opening following MOP
—
Valve alarm enable/disable valve alarm (valve not closed at shutdown alarm) o
S1 probe limits Min value
‘zero’ scale for pressure sensor on input S1
l
S1 probe limits Max value
end scale for pressure sensor on input S1
l
S2-Pt1000 calib.
calibration index for PT1000 sensor
—
Probes offset S1
correction of the lower limit of S1 —
Probes offset S2
correction of the lower limit of S2 —
Probes offset S3
correction of the lower limit of S3 —
Enable reset to dafault
enable restore default parameters —
Reset to default
confi rm enable default parameters —
Standby steps
number of valve standby steps —
Blocked valve check
time after which, in certain conditions, the valve is considered as being blocked
—
Go ahead
enable restart following error
—
13
Fig. 3.5
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
READ
Parameter name Description
System measurements (Fig. 3.5)
EEV opening valve opening as a %
EEV position position of the valve in steps
Act. SH set current superheat set point
Superheat superheat value measured
Ev. probe press. evaporation pressure value measured
Ev. probe sat. temp. saturated gas temperature value calculated in the evaporator
Suction temp. compressor suction temperature value measured
Cond. probe press. condensing pressure value measured, from µC
2
Cond. probe sat. temp. saturated gas temperature in the condenser
Digital variables (Fig. 9)
µC2 off line active when µC2 is not connected to EVD
4
50% capacity active when the capacity of the circuit is 50%
100% capacity active when the capacity of the circuit is 100%
alarm Low Superheat active in low superheat conditions
alarm MOP timeout active in conditions with excessive evaporation pressure
alarm LOP timeout active in conditions with excessive evaporation pressure
EEV not closed active due to failed valve closing
Low SH status active when in low superheat control status
MOP status active when in maximum evaporation pressure control status
LOP status active when in minimum evaporation pressure control status
High Tc status active when in high condensing temperature control status
alarm Eeprom error active following an EEPROM memory error
alarm probe error active following an error on the signal from the probe
3.1.3 EVD4_UI user interface
The EVD4_UI user interface is based on the CAREL supervisor protocol and is designed for the easy and
intuitive reading or confi guration of the control parameters. The program can be started in different
confi gurations so as to display the set of parameters that is suitable for the type of installation the EVD
4
is used
in; to do this, make the connection using the name of the required confi guration. The interface confi guration
for µC
2
is shown in Fig. 3.5 and is activated by making the “EVD4_UI MCH2” connection.
as described in APPENDIX I “INSTALLING AND USING THE EVD4_UI PROGRAM”.
3.1.4 Start-up
After having connected the EVD4, as described in 3.1.1, connect the service serial port to a PC using the
special converter and confi gure the values of the parameters and the address using the software described
in 3.1.3 according to the application and/or systems used.
The parameters can be accessed for read and write even if the EVD4 is not powered, as the converter or
the programming key provide the power supply to the driver, excluding the valve.
14
Fig. 3.8
Fig. 3.6
GNX
RT+
RT-
PHOENIX® MC1,5/3-ST-3,81
G
G0
G Vbat DI1
S4V
S3 S2 S1
G0
GND
DI2
S4I
Vr1 Vr2 OC
EVD
4
0,8 A T
24 Vac
pCO
230 Vac
Fig. 3.7
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
3.2 Application with pCO (EVD000*40* and EVD000*43*) via tLAN
3.2.1 Connections
Communication: with reference to Fig. 3.6, connect GNX and RT+ to the pCO unit.
Power supply: with reference to Fig. 3.7, connect G and G0 to the 24 Vac power supply side;
Valve: with reference to Fig. 3.8, connect the valve according to the type set for the “Valve
type” parameter.
Probes: Connect the ratiometric pressure sensors and NTC temperature sensors to S1 and S3
respectively.
For other types of probes or connections, change the value of the “EVD probes type”
parameter and see chap. 4
3.2.2 List of parameters
Below is the list of parameters; the meaning of each is detailed in APPENDIX II, while APPENDIX III shows a
list of the values of the reference parameters in relation to the most common applications.
In the standard application, the EVD4 read and write parameters are organised into three groups, accessible
from a pCO terminal: input/output, maintenance and manufacturer
The SYSTEM SET level must be compiled, as this contains the information on what is physically installed
in the system. Selecting the type of driver and enabling any advanced functions will allow access to
specifi c fi elds/masks in this or other menus.
The AUTO SETUP level of parameters must also be compiled, and contains fundamental information on
the type of unit.
The ADVANCED SET branch is not required for standard superheat control and is provided for expert
users and/or to implement non-standard functions.
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
NTC -50T105 °C
S3
NTC*WF*
Temp.
GND
ratiometric +
OUT
Vr1
SPKT*R*
Press.
GND
P
S1
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
1
2
3
4
Green
Black
Red
White
Green
Yellow
Brown
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00004**
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
3
4
1
2
Green
Yellow
Brown
White
Green
Black
Red
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00014**
15
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Key:
= Main parameters required to start operation;
= Secondary parameters required for optimum operation;
— = Advanced parameters.
MANUFACTURER group
SYSTEM SET
Parameter name Description
EVD type
model of EVD used, from pCO
EVD probes type
number indicating the combination of sensors used to calculate the superheat
Valve type
number that defi nes the type of electronic valve used
Battery presence
enable valve not closed error, to be entered if the battery is present
Refrigerant
number indicating the type of refrigerant used
Custom valve confi guration
Minimum steps
minimum control steps
—
Maximum steps
maximum control steps
—
Closing steps
steps completed in total closing —
Opening extra steps
enable extra steps in opening —
Closing extra steps
enable extra steps in closing —
Phase current
peak current per phase —
Still current
current with the motor off —
Steprate
motor speed —
Duty cycle
motor duty cycle
—
EEV stand-by steps
number of valve standby steps, see standby steps —
S1 probe limits Min
‘zero’ scale for pressure sensor on input S1
S1 probe limits Max
end scale for pressure sensor on input S1
S2-Pt1000 calib.
calibration index for PT1000 sensor —
Alarms delay
Alarms delay Low SH
low superheat alarm delay
—
Alarms delay High SH
high superheat temperature alarm delay in CH mode —
Alarms delay LOP
low evaporation pressure (LOP) alarm delay —
Alarms delay MOP
high evaporation pressure (MOP) alarm delay —
Alarms delay probe error
probe error alarm delay —
Stand alone enable StandAlone
AUTOSETUP
Parameter name Description
Re-install AUTOSETUP values
confi rm enable restore parameter default values
Circuit/EEV ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed
Compressor or unit
macroblock parameter that defi nes the integral time
Capacity control
macroblock parameter that defi nes the proportional factor
Evaporator Type Cool
macroblock parameter that defi nes the integral time
Heat
macroblock parameter that defi nes the integral time
Cool Mode
temperature at minimum operating pressure (MOP) in CH mode
Heat Mode
temperature at minimum operating pressure (LOP) in HP mode
Defr. Mode
temperature at minimum operating pressure (LOP) in DF mode
MOP
Cool Mode
temperature at maximum operating pressure (MOP) in CH mode
Standby steps
temperature at maximum operating pressure (MOP) in HP mode
Defr. Mode
temperature at maximum operating pressure (MOP) in DF mode
High SH alarm threshold maximum superheat temperature
ADVANCED SETTINGS – FINE TUNING
Parameter name Description
CH-Circuit/EEV Ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed, in CH mode —
CH-Superheat set
superheat set point in CH mode
—
cool mode adjust CH-Proportional gain
PID proportional factor in CH mode
—
CH-Integral time
integral time for superheat control in CH mode
—
CH-Low Superheat
low superheat value in CH mode —
heat mode adjust
HP-Circuit/EEV Ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed, in HP mode —
HP-Superheat set
superheat set point in HP mode —
HP-Proportional gain
PID proportional factor in HP mode —
HP-Integral time
integral time for superheat control in HP mode —
HP-Low Superheat
low superheat value in HP mode
—
defr. mode adjust
DF-Circuit/EEV Ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed, in DF mode
—
DF-Superheat set
superheat set point in DF mode —
DF-Proportional gain
PID proportional factor in DF mode —
DF-Integral time
integral time for superheat control in DF mode —
DF-Low Superheat
low superheat value in DF mode —
common list adjust
SHeat dead zone
dead zone for PID control —
Derivative time
PID derivative time —
Low SHeat int. time
integral time for low superheat control —
LOP integral time
integral time for low evaporation pressure (LOP) control —
MOP integral time
integral time for high evaporation pressure (MOP) control —
MOP startup delay
MOP delay time —
Hi TCond. protection
maximum condensing temperature —
Hi TCond. int. time
integral time for high condensing pressure control (HiTcond) —
Dynamic prop. gain
attenuation coeffi cient with change in capacity —
Blocked valve check
time after which, in certain conditions, the valve is considered as being blocked —
16
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
INPUT/OUTPUT group
Parameter name Descriprion
DriverX mode operating mode of the X-th driver, from pCO
EEV mode man. enable/disable manual valve positioning
EEV position calculated electronic expansion valve opening position
Power request cooling capacity, from pCO
RXXX refrigerant confi gured for the REFRIGERANT parameter
Superheat superheat value measured
Saturated temp. see Ev. probe sat. temp.
Suction temp. compressor suction temperature value measured
Evaporation probe Pressure evaporation pressure value measured
Saturated Temp. saturated gas temperature value calculated in the evaporator
Condensation
probe
Pressure condensing pressure value measured, from pCO
Saturated temp saturated gas temperature value calculated in the condenser, calculated from dry on previous condensing pressure
Aux. probe value measured by the auxiliary probe set for the AUX. PROBE CONFIG. parameter
Act. SH set current superheat set point
EVD version H.W driver hardware version
EVD version S.W software version installed on the driver
MAINTENANCE group
Parameter name Description
Manual mng.
driver ‘X’
EEV Mode electronic expansion valve control mode, read EEV mode man.
Requested steps required motor position in manual control.
EEV position calculated electronic expansion valve opening position
Driver ‘X’ status Go ahead enable restart following error
Probes offset S1 correction of the lower limit of S1
Probes offset S2 correction of the lower limit of S2
Probes offset S3 correction of the lower limit of S3
ADVANCED SETTINGS – SPECIAL TOOLS
Not available
ALARMS (for driver ‘X’)
Parameter name Description
alarm probe error active following an error on the signal from the probe
alarm Eeprom error active following an EEPROM memory error
alarm MOP timeout active in conditions with excessive evaporation pressure
alarm LOP timeout active in conditions with insuffi cient evaporation pressure
alarm Low Superheat active in low superheat conditions
EEV not closed active due to failed valve closing
driver X high superheat driver X with high superheat
3.2.3 Start-up
After having connected the EVD4, cas described in 3.4.1, confi gure the parameters listed in 3.4.2 using
the display that manages the pCO, according to the application and/or systems used. For the unit to be
correctly operated, the SYSTEM SET and AUTOSETUP levels need to be compiled.
The SYSTEM SET level must be compiled, as this contains the information on what is physically installed
in the system. Selecting the type of driver and enabling any advanced functions will allow access to
specifi c fi elds/masks in this or other menus.
The AUTO SETUP level of parameters must also be compiled, and contains fundamental information on
the type of unit.
The ADVANCED SET branch is not required for standard superheat control and is provided for expert
users and/or to implement non-standard functions.
If some essential fi elds have not been confi gured, the alarm message
– DRIVER “x” AUTOSETUP PROCEDURE NOT COMPLETED –
will prevent the unit from being started until the autosetup procedure has been completed.
17
MOLEX®
Mini-Fit 538-39-01-2140
G Vbat DI1 S4V S3 S2 S1
G0 GND
4...20 mA
0...10 V
DI2 S4I Vr1 Vr2 OC
+
Fig. 3.9
USB
convertitore /
converter
CVSTDUTTL0
A
GNX
RT+
RT-
B
Fig. 3.10
G Vbat DI1
S4V
S3 S2 S1
G0
GND
DI2
S4I
Vr1 Vr2 OC
EVD
4
0,8 A T
24 Vac
DI 1
230 Vac
Fig. 3.11
Fig. 3.12
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
3.3 Application as positioner (EVD000*40* and EVD000*43*)
The EVD4 code EVD000*40* (or EVD000*43*) can be used as a positioner for electronic expansion
valves, proportional to a 4 to 20 mA or 0 to 10 Volt signal from a controller.
3.3.1 Connections
Communication: connect S4I and GND to the controller for 4 to 20 mA signals;
connect S4V and GND to th
e controller for 0 to 10 Volt signals (Fig. 3.9).
Confi guration: connect the converter (CVSTDUTTL0 or CVSTD0TTL0) to the service serial port and to a
PC with USB or RS232 (Fig. 3.10).
Power supply: with reference to Fig. 3.11, connect G and G0 to the 24 Vac power supply side.
Valve: with reference to Fig. 3.12 connect the valve according to the type set for the “Valve
type” parameter.
3.3.2 List of parameters
Below is the list of parameters visible on the EVD4-UI, divided into read and write; the meaning of each
parameter is detailed in APPENDIX II.
Key:
= Main parameters required to start operation;
= Secondary parameters required for optimum operation;
— = Advanced parameters.
WRITE
Parameter name Description
Mode dependent parameters (Fig. 9)
Calibr. S4 gain mA current gain on channel S4
Calibr. S4 offs mA current offset on channel S4
Calibr. S4 gain Volt voltage gain on channel S4
Calibr. S4 offs Volt voltage offset on channel S4
Global parameters (Fig. 9)
Regulation type
type of control
EEV mode man. enable/disable manual valve positioning
Requested steps required motor position in manual control
S4 probe type
type of probe on channel S4
Valve type
number that defi nes the type of electronic valve used
KEY 1
KEY 12
En. positioner
enable positioner function
READ
System measurements (Fig. 9)
Parameter name Description
EEV opening valve opening as a %
EEV position position of the valve in steps
S4 signal signal on input S4
Digital variables (Fig. 9)
Reset to default confi rm enable default parameters
Functional test functional test
Digital input 1 status of digital input 1
Stand alone select stand-alone operation
Key:
A Service serial port
B Main serial port
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
1
2
3
4
Green
Black
Red
White
Green
Yellow
Brown
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00004**
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
3
4
1
2
Green
Yellow
Brown
White
Green
Black
Red
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00014**
18
Fig. 3.13
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
3.3.3 EVD4_UI user interface
The EVD4_UI user interface is based on the CAREL supervisor protocol and is designed for the easy and
intuitive reading or confi guration of the control parameters. The program can be started in different
confi gurations so as to display the set of parameters that is suitable for the type of installation the EVD
4
; is used
in; to do this, make the connection using the name of the required confi guration. The interface confi guration
for the ‘positioner’ function is shown in Fig. 3.13 and is activated by making the “EVD4_UI positioner”
connection.
3.3.4 Start-up
After having connected the EVD4 as described in 3.3.1, connect the service serial port to a PC using the
converter and confi gure the values of the parameters listed in 3.3.2 using the software described in 3.3.3
as follows:
- Power up the EVD
4
from the mains or via converter
- Connect EVD4 to the PC via the converter
- Set “S4 probe type” = 5 (confi guration of input S4 as 4 to 20 mA) or 6 (0 to 10 V)
- Close input DI1
- Set “posit. with S4”= 2
- Activate “stand alone”
To calibrate the analogue inputs, proceed as follows:
- Reset the EVD4 by activating the digital variable “Reset to default”
- Within 30 seconds write 19157 to KEY1 (functional test mode)
- Write 1223 to KEY12 (disable exit the functional test by timeout, within 250 seconds)
- Activate the Functional test digital variable; the calibration parameters are now accessible in write mode
- Set the Calibr. S4 gain mA and Calibr. S4 offs mA parameters to zero for 4 to 20 mA operation, or
alternatively Calibr. S4 gain Volt and Calibr. S4 offs Volt for 0 to 10 Volt operation
- Set S4 probe type = 5 (confi guration of input S4)
The parameters can be accessed for read and write even if the EVD
4
is not powered, as the converter or the
programming key provide the power supply to the driver, excluding the valve
19
Fig. 3.14
GNX
RT+
RT-
PHOENIX® MC1,5/3-ST-3,81
Fig. 3.16
G
G0
G Vbat DI1
S4V
S3 S2 S1
G0
GND
DI2
S4I
Vr1 Vr2 OC
EVD
4
0,8 A T
24 Vac
pCO
230 Vac
Fig. 3.15
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
3.4 Application with pCO (EVD000041* and EVD000044*) via pLAN
3.4.1 Connections
Communication: connect GNX, RT+ and RT- to the pCO unit (Fig. 3.14).
Power supply: connect G and G0 to the 24 Vac (Fig. 3.15).
Valve: with reference to Fig. 3.16, connect the valve according to the type set for
the “Valve type” parameter;
Probes: Connect the ratiometric pressure sensors and NTC temperature sensors to S1 and S3
respectively.
For other types of probes or connections, change the value of the “EVD probes type”
parameter and see chap. 4
3.4.2 List of parameters
Below is the list of parameters; the meaning of each is detailed in APPENDIX II, while APPENDIX III shows a
list of the values of the reference parameters in relation to the most common applications.
In the standard application, the EVD4 read and write parameters are organised into three groups, accessible
from a pCO terminal: input/output, maintenance and manufacturer
The SYSTEM SET level must be compiled, as this contains the information on what is physically installed
in the system. Selecting the type of driver and enabling any advanced functions will allow access to
specifi c fi elds/masks in this or other menus.
The AUTO SETUP level of parameters must also be compiled, and contains fundamental information on
the type of unit.
The ADVANCED SET branch is not required for standard superheat control and is provided for expert
users and/or to implement non-standard functions.
MANUFACTURER group
SYSTEM SET
Key:
= Main parameters required to start operation;
= Secondary parameters required for optimum operation;
— = Advanced parameters.
Parameter name Description
EVD type
model of EVD used, from pCO
EVD probes type
number indicating the combination of sensors used to calculate the superheat
Valve type
number that defi nes the type of electronic valve used
Battery presence
enable valve not closed error, to be entered if the battery is present
Refrigerant
number indicating the type of refrigerant used
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
NTC -50T105 °C
S3
NTC*WF*
Temp.
GND
ratiometric +
OUT
Vr1
SPKT*R*
Press.
GND
P
S1
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
1
2
3
4
Green
Black
Red
White
Green
Yellow
Brown
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00004**
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
3
4
1
2
Green
Yellow
Brown
White
Green
Black
Red
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00014**
20
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Custom valve confi guration
Minimum steps
minimum control steps
—
Maximum steps
maximum control steps
—
Closing steps
steps completed in total closing
—
Opening extra steps
enable extra steps in opening
—
Closing extra steps
enable extra steps in closing
—
Phase current
peak current per phase
—
Still current
current with the motor off
—
Steprate
motor speed
—
Duty cycle
motor duty cycle —
EEV stand-by steps
number of valve standby steps, see standby steps
—
S1 probe limits Min
‘zero’ scale for pressure sensor on input S1
S1 probe limits Max
end scale for pressure sensor on input S1
S2-Pt1000 calib.
calibration index for PT1000 sensor —
Alarms delay
Alarms delay Low SH
low superheat alarm delay —
Alarms delay High SH
high superheat temperature alarm delay in CH mode —
Alarms delay LOP
low evaporation pressure (LOP) alarm delay —
Alarms delay MOP
high evaporation pressure (MOP) alarm delay —
Alarms delay probe error
probe error alarm delay —
Stand alone
enable StandAlone —
AUTOSETUP
Parameter name Description
Re-install AUTOSETUP values
confi rm enable restore parameter default values
Circuit/EEV ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed
Compressor or unit
macroblock parameter that defi nes the integral time
Capacity control
macroblock parameter that defi nes the proportional factor
Evaporator Type Cool
macroblock parameter that defi nes the integral time
Heat
macroblock parameter that defi nes the integral time
Cool Mode
temperature at minimum operating pressure (MOP) in CH mode
Heat Mode
temperature at minimum operating pressure (LOP) in HP mode
Defr. Mode
temperature at minimum operating pressure (LOP) in DF mode
MOP
Cool Mode
temperature at maximum operating pressure (MOP) in CH mode
Standby steps
temperature at maximum operating pressure (MOP) in HP mode
Defr. Mode
temperature at maximum operating pressure (MOP) in DF mode
High SH alarm threshold
maximum superheat temperature
—
ADVANCED SETTINGS – FINE TUNING
Parameter name Description
CH-Circuit/EEV Ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed, in CH mode —
CH-Superheat set
superheat set point in CH mode
—
cool mode adjust CH-Proportional gain
PID proportional factor in CH mode —
CH-Integral time
integral time for superheat control in CH mode
—
CH-Low Superheat
low superheat value in CH mode —
heat mode adjust
HP-Circuit/EEV Ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed, in HP mode —
HP-Superheat set
superheat set point in HP mode —
HP-Proportional gain
PID proportional factor in HP mode —
HP-Integral time
integral time for superheat control in HP mode —
HP-Low Superheat
low superheat value in HP mode —
defr. mode adjust
DF-Circuit/EEV Ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed, in DF mode —
DF-Superheat set
superheat set point in DF mode —
DF-Proportional gain
PID proportional factor in DF mode
—
DF-Integral time
integral time for superheat control in DF mode
—
DF-Low Superheat
low superheat value in DF mode —
common list adjust
SHeat dead zone dead zone for PID control
Derivative time PID derivative time
Low SHeat int. time integral time for low superheat control
LOP integral time integral time for low evaporation pressure (LOP) control
MOP integral time integral time for high evaporation pressure (MOP) control
MOP startup delay MOP delay time
Hi TCond. protection maximum condensing temperature
Hi TCond. int. time integral time for high condensing pressure control (HiTcond)
Dynamic prop. gain attenuation coeffi cient with change in capacity
Blocked valve check time after which, in certain conditions, the valve is considered as being blocked
INPUT/OUTPUT group
Parameter name Descriprion
DriverX mode operating mode of the X-th driver, from pCO
EEV mode man. enable/disable manual valve positioning
EEV position calculated electronic expansion valve opening position
Power request cooling capacity, from pCO
RXXX refrigerant confi gured for the REFRIGERANT parameter
Superheat superheat value measured
Saturated temp. see Ev. probe sat. temp.
Suction temp. compressor suction temperature value measured
Evaporation probe Pressure evaporation pressure value measured
Saturated Temp. saturated gas temperature value calculated in the evaporator
Condensation
probe
Pressure condensing pressure value measured, from pCO
Saturated temp saturated gas temperature value calculated in the condenser, calculated from dry on previous condensing pressure
Aux. probe value measured by the auxiliary probe set for the AUX. PROBE CONFIG. parameter
Act. SH set current superheat set point
EVD version H.W driver hardware version
EVD version S.W software version installed on the driver
21
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
MAINTENANCE group
Parameter name Description
Manual mng.
driver ‘X’
EEV Mode electronic expansion valve control mode, read EEV mode man.
Requested steps required motor position in manual control.
EEV position calculated electronic expansion valve opening position
Driver ‘X’ status Go ahead enable restart following error
Probes offset S1 correction of the lower limit of S1
Probes offset S2 correction of the lower limit of S2
Probes offset S3 correction of the lower limit of S3
ADVANCED SETTINGS – SPECIAL TOOLS
Not available
ALARMS (for driver ‘X’)
Parameter name Description
alarm probe error active following an error on the signal from the probe
alarm Eeprom error active following an EEPROM memory error
alarm MOP timeout active in conditions with excessive evaporation pressure
alarm LOP timeout active in conditions with insuffi cient evaporation pressure
alarm Low Superheat active in low superheat conditions
EEV not closed active due to failed valve closing
driver X high superheat driver X with high superheat
3.4.3 Start-up
After having connected the EVD4, cas described in 3.4.1, confi gure the parameters listed in 3.4.2 using
the display that manages the pCO, according to the application and/or systems used. For the unit to be
correctly operated, the SYSTEM SET and AUTOSETUP levels need to be compiled.
If some essential fi elds have not been confi gured, the alarm message
– DRIVER “x” AUTOSETUP PROCEDURE NOT COMPLETED –
will prevent the unit from being started until the autosetup procedure has been completed.
22
G
G0
G Vbat DI1
S4V
S3 S2 S1
G0
GND
DI2
S4I
Vr1 Vr2 OC
EVD
4
0,8 A T
24 Vac
µC
2
230 Vac
Fig. 3.19
USB
convertitore /
converter
CVSTDUTTL0
A
GNX
RT+
RT-
B
Fig. 3.18
Fig. 3.20
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
NTC -50T105 °C
S3
Temperature
NTC*WF*
Digital input
DI1
GND
GNDDI1
ratiometric +
OUT
Vr1
Ratiometric
pressure SPKT*R*
GND
P
S1
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
3.5 Application with supervisor (EVD000*42* and EVD000*45*) via RS485
3.5.1 Connections
Communication: connect GNX, RT+ and RT- to the converter CVSTDUMOR0 (Fig 3.17).
Confi guration: Connect the converter (CVSTDUTTL0 or CVSTD0TTL0) to the service serial port
and to a PC with USB or RS232 serial port (Fig. 3.18).
Power supply: connect G and G0 to the 24 Vac power supply (Fig 3.19)
Valve: connect the valve according to the type set for the “Valve type” parameter (Fig. 3.20).
Probes Connect the ratiometric pressure sensors and NTC temperature sensors to S1
and S3 respectively.
For other types of probes or connections, change the value of the “EVD
probes type” parameter and see technical leafl et.
3.5.2 List of parameters
Below is the list of parameters visible from the EVD4-UI, divided into write and read; the meaning of each is
detailed in APPENDIX II, while APPENDIX III shows a list of the values of the reference parameters in relation to
certain applications. Key: = Main parameters required to start operation; = Secondary parameters required
for optimum operation; — = Advanced parameters.
WRITE
Mode Parameter name Parameter description
Mode dependent parameters (Fig. 3.21)
Main
Circuit/EEV ratio
percentage of the maximum capacity managed by the valve
CH-Superheat set
superheat set point
CH-Prop. gain
PID proportional factor
CH-Integral time
integral time for superheat control
Advanced I
SH dead zone
dead zone for PID control —
Derivative time
PID derivative time
CH-Low Superheat
low superheat value
LOP Cool Mode
temperature at minimum operating pressure (LOP) in CH mode
MOP Cool Mode
temperature at maximum operating pressure (MOP) in CH mode
Low SH int. time
integral time for low superheat control —
LOP integral time
integral time for low evaporation pressure (LOP) control —
MOP integral time
integral time for high evaporation pressure (MOP) control —
Alarms del. Low SH
low superheat alarm delay —
Alarms del. LOP
low evaporation pressure (LOP) alarm delay —
Alarms del. MOP
high evaporation pressure (MOP) alarm delay —
MOP startup delay
MOP delay time when starting control —
Advanced II
EEV mode man.
enable/disable manual valve positioning —
Requested steps
required motor position in manual control —
BlockedValve check
time after which the valve is considered as being blocked —
EVD probes type
type of sensors used —
S2-Pt1000 calib.
calibration index for PT1000 sensor —
Probes offset S1
correction of S1 —
Probes offset S2
correction of S2 —
Probes offset S3
correction of the lower limit of S3 —
Al. delay probe err.
probe error alarm delay —
Open relais low SH
enable/disable relay opening following low superheat —
Open relais MOP
enable/disable relay opening following MOP —
Valve alarm
enable/disable valve alarm
GNX
RT+
RT-
PHOENIX® MC1,5/3-ST-3,81
Supervisor
(RS485)
Fig. 3.17
Key:
A Service serial port
B Main serial port
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
1
2
3
4
Green
Black
Red
White
Green
Yellow
Brown
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00004**
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
3
4
1
2
Green
Yellow
Brown
White
Green
Black
Red
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00014**
23
Fig. 3.21
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
System
Minimum steps
minimum control steps —
Maximum steps
maximum control steps —
Closing steps
steps completed in total closing —
Standby steps
number of valve standby steps —
Steprate
motor speed —
Phase current
peak current per phase —
Still current
current with the motor off —
Duty cycle
motor duty cycle —
Global parameters (Fig. 3.21)
Refrigerant
number indicating the type of refrigerant used
Valve type
number that defi nes the type of electronic valve used
S1 probe limitsMin barg
‘zero’ scale for pressure sensor on input S1
S1 probe limitsMax barg
end scale for pressure sensor on input S1
Stand alone
enable StandAlone
Go ahead enable restart following error
READ
Parameter name Description
System measurements (Fig. 3.21)
EEV opening valve opening as a %
EEV position calculated electronic expansion valve opening position
Act. SH set current superheat set point
Superheat superheat value measured
Ev. probe press. evaporation pressure value measured by sensor
Ev. probe sat. temp saturated gas temperature value calculated in the evaporator
Suction temp. compressor suction temperature value measured by sensor
Digital variables (Fig. 3.21)
Alarm Low SH active in low superheat conditions
Alarm MOP timeout active in conditions with excessive evaporation pressure
Alarm LOP timeout active in conditions with insuffi cient evaporation pressure
EEV not closed active due to failed valve closing
Low SH status active when in low superheat control status
MOP status active when in maximum evaporation pressure control status
LOP status active when in minimum evaporation pressure control status
Alarm Eeprom err. active following an EEPROM memory error
Alarm probe err. active following an error on the signal from the probe
Digital input 1 status of digital input 1
DOUT2 output relay control signal
3.5.3 EVD4_UI user interface
The EVD4_UI user interface is based on the CAREL supervisor protocol and is designed for the easy
and intuitive reading or confi guration of the control parameters. The program can be started in different
confi gurations so as to display the set of parameters that is suitable for the type of installation the EVD4
is used in; to do this, make the connection using the name of the required confi guration.
The interface confi guration for the ‘positioner’ function is shown in Fig. 3.21 and is activated by making
the “EVD4_UI stand alone” connection, as described in APPENDIX I “INSTALLING AND USING THE
EVD4_UI PROGRAM”.
3.5.4 Start-up
After having connected the EVD4, as described in 3.5.1, connect the service serial port to a PC via the
special converter and confi gure the parameters and the address using according to the application and/
or systems used. The controller is already enabled; to switch off the EVD4, disable the Stand-alone
variable or modify the status of digital input D1 (Fig. 2.1) and run the supervisor program (i.e. PlantVisor)
to monitor the system.
24
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Fig. 3.26
3.6 Application with Modbus® protocoll (EVD0001460) via RS485
3.6.1 Connections
Communication: connect GNX, RT+ and RT- to the corresponding ends of the RS485 serial interface
connected to the pCO controller (see the pCO sistema manual) (Fig 3.22).
Confi guration: Connect the converter (CVSTDUTTL0 or CVSTD0TTL0) to the service serial port
and to a PC with USB or RS232 serial port (Fig. 3.18).
Power supply: connect G and G0 to the 24 Vac power supply (Fig 3.19)
Valve: connect the valve according to the type set for the “Valve type” parameter (Fig. 3.20).
Probes: Connect the ratiometric pressure sensors and NTC temperature sensors to S1 and S3
respectively.
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
1
2
3
4
Green
Black
Red
White
Green
Yellow
Brown
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00004**
Sporlan
SEI
SEH
CAREL
DANFOSS
ETS
ALCO
EX5/6
2
1
4
3
3
4
1
2
Green
Yellow
Brown
White
Green
Black
Red
White
Green
White
Red
Black
Blue
White
Brown
Black
for code:
EVD00014**
3.5.2 List of parameters
Below is the list of parameters visible from the EVD4-UI, divided into write and read; the meaning of each is
detailed in APPENDIX II, while APPENDIX III shows a list of the values of the reference parameters in relation to
certain applications. Key: = Main parameters required to start operation; = Secondary parameters required
for optimum operation; — = Advanced parameters.
WRITE
Mode Parameter name Parameter description
Mode dependent parameters (Fig. 3.21)
Main
Circuit/EEV ratio
percentage of the maximum capacity managed by the valve
CH-Superheat set
superheat set point
CH-Prop. gain
PID proportional factor
CH-Integral time
integral time for superheat control
Advanced I
SH dead zone
dead zone for PID control —
Derivative time
PID derivative time
CH-Low Superheat
low superheat value
LOP Cool Mode
temperature at minimum operating pressure (LOP) in CH mode
MOP Cool Mode
temperature at maximum operating pressure (MOP) in CH mode
Low SH int. time
integral time for low superheat control —
LOP integral time
integral time for low evaporation pressure (LOP) control —
MOP integral time
integral time for high evaporation pressure (MOP) control —
Alarms del. Low SH
low superheat alarm delay —
Alarms del. LOP
low evaporation pressure (LOP) alarm delay —
Alarms del. MOP
high evaporation pressure (MOP) alarm delay —
MOP startup delay
MOP delay time when starting control —
Advanced II
EEV mode man.
enable/disable manual valve positioning —
Requested steps
required motor position in manual control —
BlockedValve check
time after which the valve is considered as being blocked —
EVD probes type
type of sensors used —
S2-Pt1000 calib.
calibration index for PT1000 sensor —
Probes offset S1
correction of S1 —
Probes offset S2
correction of S2 —
Probes offset S3
correction of the lower limit of S3 —
Al. delay probe err.
probe error alarm delay —
Open relais low SH
enable/disable relay opening following low superheat —
Open relais MOP
enable/disable relay opening following MOP —
Valve alarm
enable/disable valve alarm
System
Minimum steps
minimum control steps —
Maximum steps
maximum control steps —
Closing steps
steps completed in total closing —
Standby steps
number of valve standby steps —
Steprate
motor speed —
Phase current
peak current per phase —
Still current
current with the motor off —
Duty cycle
motor duty cycle —
Global parameters (Fig. 3.21)
Refrigerant
number indicating the type of refrigerant used
Valve type
number that defi nes the type of electronic valve used
S1 probe limitsMin barg
‘zero’ scale for pressure sensor on input S1
S1 probe limitsMax barg
end scale for pressure sensor on input S1
Stand alone
enable StandAlone
Go ahead enable restart following error
GNX
RT+
RT-
PHOENIX® MC1,5/3-ST-3,81
Supervisor
(RS485)
Fig. 3.22
G V bat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
NTC -50T105 °C
S3
Temperature
NTC*WF*
Digital input
DI1
GND
GNDDI1
ratiometric +
OUT
Vr1
Ratiometric
pressure SPKT*R*
GND
P
S1
For other types of probes or connections, change the value of
the “EVD probes type” parameter and see technical leafl et.
Fig. 3.23
USB
convertitore /
converter
CVSTDUTTL0
A
GNX
RT+
RT-
B
Key:
A Service serial port
B Main serial port
Fig. 3.24
G
G0
G Vbat DI1
S4V
S3 S2 S1
G0
GND
DI2
S4I
Vr1 Vr2 OC
EVD
4
0,8 A T
24 Vac
µC
2
230 Vac
Fig. 3.25
25
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
READ
Parameter name Description
System measurements (Fig. 3.21)
EEV opening valve opening as a %
EEV position calculated electronic expansion valve opening position
Act. SH set current superheat set point
Superheat superheat value measured
Ev. probe press. evaporation pressure value measured by sensor
Ev. probe sat. temp saturated gas temperature value calculated in the evaporator
Suction temp. compressor suction temperature value measured by sensor
Digital variables (Fig. 3.21)
Alarm Low SH active in low superheat conditions
Alarm MOP timeout active in conditions with excessive evaporation pressure
Alarm LOP timeout active in conditions with insuffi cient evaporation pressure
EEV not closed active due to failed valve closing
Low SH status active when in low superheat control status
MOP status active when in maximum evaporation pressure control status
LOP status active when in minimum evaporation pressure control status
Alarm Eeprom err. active following an EEPROM memory error
Alarm probe err. active following an error on the signal from the probe
Digital input 1 status of digital input 1
DOUT2 output relay control signal
3.6.3 Communication protocole
The protocol is implemented according to the envisaged specifi cations so that the device belongs to the
BASIC class, with the possibility of setting some parameters (REGULAR class).
Value Default
Address From 1 to 247 1
Broadcast Detect messages with 0 ---
Baudrate 4800, 9600, 19200 19200
Parity None, even, odd none
Mode RTU
Interface RS485
Setting the UNICAST address
The Modbus address can be selected using the “EVD4_UI Address” connection as described in “Appendix I – Installing and using the EVD4-UI program”, within the envisaged range. Values from 248 to
255 are reserved. If set to one of these values or 0, the FW sets the default value without modifying the
parameter in the E2prom. After setting the new value, the device needs to be switched off and on again
to make it effective.
Setting the BROADCAST address
Broadcast messages (with address 0) can be sent, and will be write-only messages.
The command will be executed, if possible, without any response.
Parity selection mode
The parity is selected using the same program for setting the “EVD4_UI Address”, as described in “Appendix I – Installing and using the EVD4-UI program”, setting bit 1.2 of parameter CfgProt. Specifi cally:
CfgProt Bit0 Bit1 Bit2 ModBus parity
1 1 0 0 None
3 1 1 0 Even
5 1 0 1 Odd
If no parity is selected, the number of stop bits will be 2 (default). After setting the new value, the device
needs to be switched off and on again to make it effective.
Modbus messages
The Modbus messages codes are:
01 Read Coil Status
02 Read Input Status
These two messages have the same effect as reading digital variables.
03 Read Holding Registers
04 Read Input Registers
These two messages have the same effect as reading analogue/integer variables.
05 Force Single Coil
06 Preset Single Register
15 Force Multiple Coils
16 Preset Multiple Regs
A maximum number of 8 variables can be written with commands 15 and 16.
17 Report Slave ID
The message is structured as follows, as regards the data part:
Description Type
ON status Run indicator: 0xFF or 0x00 depending on whether the device is actively controlling or not
byte
Peripheral type: high part and low part of the device code word
Firmware release: high part and low part of the FW release word
Reserved word
Hardware release: high part and low part of the HW release word
Reserved word
Reserved word
Reserved word
26
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Error messages (exceptions)
01 ILLEGAL FUNCTION
The requested function is not available on the device.
02 ILLEGAL DATA ADDRESS
The requested address, or one of the requested addresses for a read command is
invalid. This message will be returned as a response whenever attempting to read an
unavailable address.
03 ILLEGAL DATA VALUE
Whenever attempting to write a read-only variable, or alternatively when attem
pting to individually write a coil with values that are not envisaged by the protocol
(other than FF00 and 0000).
NOTE: in all other cases, the device does not check the values of the variables that
can be written, but simply whether the message is valid, using the CRC; the correct
ness of the values is checked by the supervisor.
06 SLAVE DEVICE BUSY
If for example the command involves executing actions that require a certain time
to be completed. In this case the supervisor must send the command again subse
quently.
3.6.4 Supervisor variable mapping
The supervisor variables have been grouped into two main classes: read-only, which are reserved the
lower ModBus addresses, and read/write, according to the following table:
MODBUS VARIABLES (EVD0001460)
MODBUS TYPE MODBUS INDEX CAREL TYPE
REGISTER 1 to 16 ANALOGUE (R ONLY)
REGISTER 50 to 86 ANALOGUE (R/W)
REGISTER 128 to 150 INTEGER (R ONLY)
REGISTER 163 to 231 INTEGER (R/W)
COIL 1 to 20 DIGITAL (R ONLY)
COIL 51 to 84 DIGITAL (R/W)
The correspondence between the Carel supervisor addresses of the variables and the ModBus device
addresses is as follows (for a complete description of the parameter corresponding to the variables, see
“APPENDIX II DESCRIPTION OF THE PARAMETERS”):
Carel type R/W Spv address ModBus type R/W ModBus address
A R 4 REGISTER R 1
A R 5 REGISTER R 2
A R 6 REGISTER R 3
A R 7 REGISTER R 4
A R 8 REGISTER R 5
A R 9 REGISTER R 6
A R 10 REGISTER R 7
A R 13 REGISTER R 8
A R 14 REGISTER R 9
A R 15 REGISTER R 10
A R 16 REGISTER R 11
A R 17 REGISTER R 12
A R 18 REGISTER R 13
A R 37 REGI STER R 14
A R 38 REGISTER R 15
A R 39 REGISTER R 16
A R/W 1 REGISTER R/W 50
A R/W 2 REGISTER R/W 51
A R/W 3 REGISTER R/W 52
A R/W 11 REGISTER R/W 53
A R/W 12 REGISTER R/W 54
A R/W 21 REGISTER R/W 55
A R/W 22 REGISTER R/W 56
A R/W 23 REGISTER R/W 57
A R/W 24 REGISTER R/W 58
A R/W 25 REGISTER R/W 59
A R/W 26 REGISTER R/W 60
A R/W 27 REGISTER R/W 61
A R/W 28 REGISTER R/W 62
A R/W 29 REGISTER R/W 63
A R/W 30 REGISTER R/W 64
A R/W 31 REGISTER R/W 65
A R/W 32 REGISTER R/W 66
A R/W 33 REGISTER R/W 67
A R/W 34 REGISTER R/W 68
A R/W 35 REGISTER R/W 69
A R/W 36 REGISTER R/W 70
A R/W 40 REGISTER R/W 71
A R/W 43 REGISTER R/W 72
A R/W 44 REGISTER R/W 73
A R/W 45 REGISTER R/W 74
A R/W 46 REGISTER R/W 75
A R/W 47 REGISTER R/W 76
27
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
A R/W 48 REGISTER R/W 77
A R/W 49 REGISTER R/W 78
A R/W 50 REGISTER R/W 79
A R/W 51 REGISTER R/W 80
A R/W 52 REGISTER R/W 81
A R/W 53 REGISTER R/W 82
A R/W 54 REGISTER R/W 83
A R/W 55 REGISTER R/W 84
A R/W 56 REGISTER R/W 85
A R/W 57 REGISTER R/W 86
I R 12 REGISTER R 128
I R 15 REGISTER R 129
I R 21 REGISTER R 130
I R 66 REGISTER R 131
I R 77 REGISTER R 132
I R 90 REGISTER R 133
I R 91 REGISTER R 134
I R 92 REGISTER R 135
I R 93 REGISTER R 136
I R 94 REGISTER R 137
I R 95 REGISTER R 138
I R 96 REGISTER R 139
I R 100 REGISTER R 140
I R 105 REGISTER R 141
I R 106 REGISTER R 142
I R 107 REGISTER R 143
I R 108 REGISTER R 144
I R 109 REGISTER R 145
I R 110 REGISTER R 146
I R 111 R EG I ST ER R 147
I R 112 REGISTER R 148
I R 113 REGISTER R 149
I R 114 REGISTER R 150
I R/W 1 REGISTER R/W 163
I R/W 2 REGISTER R/W 164
I R/W 3 REGISTER R/W 165
I R/W 4 REGISTER R/W 166
I R/W 5 REGISTER R/W 167
I R/W 6 REGISTER R/W 168
I R/W 7 REGISTER R/W 169
I R/W 8 REGISTER R/W 170
I R/W 9 REGISTER R/W 171
I R/W 10 REGISTER R/W 172
I R/W 11 REGISTER R/W 173
I R/W 13 REGISTER R/W 174
I R/W 14 REGISTER R/W 175
I R/W 16 REGISTER R/W 176
I R/W 17 REGISTER R/W 177
I R/W 18 REGISTER R/W 178
I R/W 19 REGISTER R/W 179
I R/W 20 REGISTER R/W 180
I R/W 22 REGISTER R/W 181
I R/W 23 REGISTER R/W 182
I R/W 24 REGISTER R/W 183
I R/W 25 REGISTER R/W 184
I R/W 26 REGISTER R/W 185
I R/W 27 REGISTER R/W 186
I R/W 28 REGISTER R/W 187
I R/W 29 REGISTER R/W 188
I R/W 30 REGISTER R/W 189
I R/W 31 REGISTER R/W 190
I R/W 33 REGISTER R/W 191
I R/W 34 REGISTER R/W 192
I R/W 35 REGISTER R/W 193
I R/W 36 REGISTER R/W 194
I R/W 37 REGISTER R/W 195
I R/W 38 REGISTER R/W 196
I R/W 39 REGISTER R/W 197
I R/W 40 REGISTER R/W 198
I R/W 41 REGISTER R/W 199
I R/W 42 REGISTER R/W 200
I R/W 43 REGISTER R/W 201
I R/W 44 REGISTER R/W 202
I R/W 45 REGISTER R/W 203
I R/W 46 REGISTER R/W 204
I R/W 47 REGISTER R/W 205
I R/W 48 REGISTER R/W 206
I R/W 49 REGISTER R/W 207
I R/W 50 REGISTER R/W 208
I R/W 51 REGISTER R/W 209
I R/W 52 REGISTER R/W 210
I R/W 53 REGISTER R/W 211
I R/W 54 REGISTER R/W 212
I R/W 55 REGISTER R/W 213
I R/W 56 REGISTER R/W 214
I R/W 57 REGISTER R/W 215
28
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
I R/W 58 REGISTER R/W 216
I R/W 59 REGISTER R/W 217
I R/W 60 REGISTER R/W 218
I R/W 61 REGISTER R/W 219
I R/W 62 REGISTER R/W 220
I R/W 63 REGISTER R/W 221
I R/W 67 REGISTER R/W 222
I R/W 68 REGISTER R/W 223
I R/W 69 REGISTER R/W 224
I R/W 70 REGISTER R/W 225
I R/W 71 REGISTER R/W 226
I R/W 72 REGISTER R/W 227
I R/W 73 REGISTER R/W 228
I R/W 74 REGISTER R/W 229
I R/W 75 REGISTER R/W 230
I R/W 76 REGISTER R/W 231
D R 17 COIL R 1
D R 18 COIL R 2
D R 19 COIL R 3
D R 20 COIL R 4
D R 21 COIL R 5
D R 22 COIL R 6
D R 24 COIL R 7
D R 41 COIL R 8
D R 42 COIL R 9
D R 43 COIL R 10
D R 44 COIL R 11
D R 45 COIL R 12
D R 46 COIL R 13
D R 47 COIL R 14
D R 49 COIL R 15
D R 50 COIL R 16
D R 51 COIL R 17
D R 52 COIL R 18
D R 53 COIL R 19
D R 64 COIL R 20
D R/W 1 COIL R/W 51
D R/W 2 COIL R/W 52
D R/W 3 COIL R/W 53
D R/W 4 COIL R/W 54
D R/W 5 COIL R/W 55
D R/W 9 COIL R/W 56
D R/W 10 COIL R/W 57
D R/W 11 COIL R/W 58
D R/W 12 COIL R/W 58
D R/W 23 COIL R/W 60
D R/W 25 COIL R/W 61
D R/W 26 COIL R/W 62
D R/W 27 COIL R/W 63
D R/W 28 COIL R/W 64
D R/W 29 COIL R/W 65
D R/W 30 COIL R/W 66
D R/W 31 COIL R/W 67
D R/W 32 COIL R/W 68
D R/W 33 COIL R/W 69
D R/W 34 COIL R/W 70
D R/W 35 COIL R/W 71
D R/W 36 COIL R/W 72
D R/W 58 COIL R/W 73
D R/W 59 COIL R/W 74
D R/W 60 COIL R/W 75
D R/W 61 COIL R/W 76
D R/W 62 COIL R/W 77
D R/W 63 COIL R/W 78
D R/W 65 COIL R/W 79
D R/W 66 COIL R/W 80
D R/W 67 COIL R/W 81
D R/W 68 COIL R/W 82
D R/W 69 COIL R/W 83
D R/W 70 COIL R/W 84
29
Fig. 3.27
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
3.6.5 EVD4_UI user interface
The EVD4_UI user interface is based on the CAREL supervisor protocol and is designed for the easy
and intuitive reading or confi guration of the control parameters. The program can be started in different
confi gurations so as to display the set of parameters that is suitable for the type of installation the EVD4
is used in; to do this, make the connection using the name of the required confi guration.
The interface confi guration for the ‘positioner’ function is shown in Fig. 3.21 and is activated by making
the “EVD4_UI stand alone” connection, as described in APPENDIX I “INSTALLING AND USING THE
EVD4_UI PROGRAM”.
3.6.6 Start-up
After having connected the EVD4, as described in 3.5.1, connect the service serial port to a PC via the
special converter and confi gure the parameters and the address using according to the application and/
or systems used. The controller is already enabled; to switch off the EVD4, disable the Stand-alone
variable or modify the status of digital input D1 (Fig. 2.1) and run the supervisor program (i.e. PlantVisor)
to monitor the system.
30
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
NTC -50T105 °C
S3
Temperature
NTC*WF*
Digital input
DI1
GND
GNDDI1
ratiometric +
OUT
Vr1
Ratiometric
pressure SPKT*R*
GND
P
S1
MOLEX® Mini-Fit 538-39-01-2140
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
NTC 0T150 °C
S2
NTC*HT*
GND GND
PT1000
S2
TSQ*
NTC -50T105 °C
S1
NTC*WF*
GND
DI2
DI1 GND GND
4…20 mA
S4I
0…10 V
S4V
+
GND
10 mA max
10 Vdc max
OC
+
GND
GNDDI2
or
Vr2 S2
S3
or
ratiometric +
OUT
SPKT*R*
GND
P
Fig. 4.1
Fig. 4.2
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
4. TECHNICAL AND CONSTRUCTIONAL SPECIFICATIONS
Installation and storage specifi cations
Operating conditions -10T60°C, < 90% RH non-condensing
Storage conditions -20T70°C, < 90% RH non-condensing
Index of protection IP20
Wire cross-section 0.5 to 2.5 mm
2
Dimensions 70 x 110 x 60
PTI of insulating materials 250 V
Protection against electric shock to be integrated into class I and/or II equipment
Degree of environmental pollution normal
Resistance to heat and fi re category D
Immunity against voltage surges category 1
Surface temperature limits as per the operating conditions
Assembly on DIN rail
Case width 4 modules
Disposal
the module is made up of metal and plastic parts. These must be
disposed of according to the waste disposal local legislation in force
Motor control
The controller works with two-pole stepper motors (Fig. 1). It works with a theoretical sinusoidal waveform, in micro-steps and with speeds from 5 to 1000 steps; the current and the control speed effectively
achievable depend on the resistance and the inductance of the motor windings used. If the driver is
connected to a pCO, it receives all the individual operating parameters for the motor from the pCO
controller, if, on the other hand, it is used in stand-alone mode or with the microchiller controller, only
one parameter needs to be set, taken from Table 5, according to the model of motor used (see Table 5).
The controller can manage motors with maximum positions of up to 32000 steps. For connection use
4-wire shielded cables, AWG18/22, max. length 9.5 m. The shield should be connected to the closest
possible earth point in the panel.
Power supply
Power supply: 20 to 28 Vac or 20 to 30 Vdc 50/60 Hz to be protected by external 0.8 A fuse, type T.
Use a class II safety transformer rated to at least 20 VA. Average current input at 24 Vac: 60 mA with the
motor not operating (control logic only); 240 mA with CAREL motor operating (240 mA peak at 18 Ω).
Emergency power supply: if the optional EVBAT00200/300 module is installed, power supply is
guaranteed to the controller for the time required to close the valve.
Inputs and outputs
Analogue inputs (*)
input type CAREL code
S1-S3: NTC (-50T105 °C) NTC*WF*
Raziom. (0,5…4,5 Vdc) SPKT*R*
S2: NTC (0T150 °C) NTC*HT*
Raziom. (0,5…4,5 Vdc) SPKT*R*
Pt1000 TSQ*
S4: current at 100 Ω 4…20 mA
voltage at 1 kΩ 0…10 V
Digital inputs ID1 and ID2: controlled by voltage-free contact or transistor, have a no-load voltage of 5 V and
deliver 5 mA short-circuited.
Digital output OC: open-collector transistor; max no-load voltage 10 V, max current 10 mA.
Relay output: normally open contact; 5 A 250 Vac resistive load; 2 A 250 Vac, inductive load (PF= 0.4).
(*) WARNING! All analogue inputs except for S4 V, the digital I/O and the serial port (not optically-
isolated) refer to the GND earth, (Fig. 3) and consequently the even temporary application of voltages
higher than ±5 V to these connectors may cause irreversible damage to the controller. Input S4 V can
tolerate voltages up to 30 V. As GND is the common earth for all the inputs, this should be replicated
on the terminal block with low-resistance connections for each input used. The GNX earth for the serial
connection is electrically connected to the GND earth. The product complies with Directive 89/336/EEC
(EMC). Contact CAREL if specifi c disturbance occurs in the confi guration used. If the connection to the
motor is made using a shielded cable, the cable shield and the channel marked by the earth symbol on
the 6-pin connector must be earthed as near as possible to the EVD400.
Valve table
n° Model Step min Step max Step close Step/s speed mA pk mA hold % duty
0 CAREL E2V* 50 480 500 100 450 100 30
1 Sporlan SEI 0.5-20 100 1596 3600 200 200 50 70
2 Sporlan SEI 30 200 3193 3600 200 200 50 70
3 Sporlan SEH 50-250 400 6386 7500 200 200 50 70
4 Alco EX5-EX6 100 750 750 450 400 100 70
5 Alco EX7 250 1600 1600 330 750 250 70
6 Alco EX8 330 step/s 250 2600 2600 330 800 500 70
7 Alco EX8 500 step/s 250 2600 2600 500 800 500 70
8 Danfoss ETS-25/50 200 2625 2700 120 140 75 70
9 Danfoss ETS-100 300 3530 3600 120 140 75 70
10 C AREL E2V*P 50 380 400 100 450 100 30
11 Danfoss ETS-250/400 350 3810 3900 120 140 75 70
Table of refrigerants (consult the electronic expansion valve technical documentation to check
the complete valve-driver system compatibility with the chosen refrigerant)
n° “R” number operating temperature n° “R” number operating temperature
1 R22 -40T60 7 R290 -50T96
2 R134a -40T60 8 R600 -50T90
3 R404a -40T60 9 R600a -50T90
4 R407c -40T60 10 R717 -60T70
5 R410a -40T60 11 R744 -50T31
6 R507c -40T60 12 R728 -201T-145
13 R1270 -60T90
Probe connections (Default)
Other connections
31
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
5. TROUBLESHOOTING
The following table lists a series of possible malfunctions that may occur when starting and operating the
driver and the electronic valve. These cover the most common problems and are provided with the aim
of offering an initial response for resolving the problem.
Problem Cause Solution
Liquid returns to the
compressor during the
operation of the controller
The probes measure an incorrect superheat
value
Check that the pressure and the temperature measured are correct and that the position of the probes is correct.
Check the correct range of the pressure probe. Check the correct electrical connections of the probes.
The type of refrigerant set is incorrect Check and correct the parameter relating to the type of refrigerant.
The type of valve set is incorrect Check and correct the valve type parameter.
The valves are not connected correctly (reversed) and are open
Check the movement of the valve by setting manual control and closing and opening it completely. If reversed,
check the connections.
The superheat set point is too low Increase the superheat set point.
Low superheat protection ineffective Increase the low superheat threshold and/or decrease the low superheat integral time.
Valve blocked open Check if the superheat is low on one or more showcases, with the valve position permanently at 0. Use manual
control to close and open it completely. If the superheat is always low, check the electrical connections and/or
replace the valve.
The “Circuit/EEV ratio” parameter is too high
on many showcases and the control set point is
often reached (for showcases only)
Try lowering the value of the “Circuit/EEV ratio” parameter on all the utilities, checking that there are no repercus-
sions on the control temperature.
Liquid returns to the
compressor only after
defrosting (for showcases only)
Before becoming stable, the superheat value is
very low for a few some minutes
Increase the low superheat threshold to at least 2 °C higher than the (low) superheat value and/or decrease the low
superheat integral time, which must always be greater than zero.
The superheat never reaches very low values Set more reactive parameters (increase the proportional factor, increase the integral time, increase the differential
time) to bring forward the closing of the valve even when the superheat is greater than the set point.
Multiple showcases defrost at the same time Stagger the start defrost times. If this is not possible, if the conditions described in the two previous points are not
present, increase the superheat set point for the showcases involved.
The valve is greatly oversized Set the key11 parameter to 24717, valve type to 99 (custom), disable the extra steps in opening parameter and
reduce the maximum valve steps parameter to a value that is 20% higher than the maximum valve position reached
during normal control. The time taken to reach steady operation after defrosting will be longer.
Liquid returns to the
compressor only when starting
the controller (after being OFF)
The “Circuit/EEV ratio” parameter is too high Lower the value of the “Circuit/EEV ratio” parameter.
The system swings
The condensing pressure swings Check that the condensing pressure is stable (maximum +/- 0.5bar from the set point). If not, try to stabilise the
condensing pressure using the controller (e.g. disable the condensing pressure control and operate the fans at
maximum speed, depending on the operating conditions of the installation).
The superheat set point is too low Increase the superheat set point, checking that the temperature of the unit remains low and reaches the control set
point. If the situation improves, adopt this new set point, otherwise see the following points.
The superheat also swings with the driver in
manual control
Observe the average operating position of the valve, enable manual positioning and set the opening of the valve to
the average value observed: if the swing persists, re-enable automatic operation and set more reactive parameters
(increase the proportional factor, increase the integral time, increase the differential time).
The superheat only swings with the driver in
automatic control
Observe the average operating position of the valve, enable manual positioning and set the opening of the valve
to the average value observed: if the swing stops, re-enable automatic operation and set less reactive parameters
(decrease the proportional factor, increase the integral time).
Bubbles of air can be seen in the liquid indicator
upstream of the expansion valve or adequate
subcooling is not guaranteed
Charge the circuit with refrigerant.
During start-up with high
evaporator temperature, the
evaporation pressure is high
MOP protection disabled Activate the MOP protection, setting the threshold to the required saturated evaporation temperature (high evapo-
ration temperature limit for the compressors) and the MOP integral time to a value greater than 0 (recommended
4sec).
MOP protection ineffective Make sure that the MOP threshold is at the required saturated evaporation temperature (high evaporation tempera-
ture limit for the compressors) and decrease the value of the MOP integral time.
Excessive refrigerant charge for the system (for
showcases only)
Apply a “soft start” technique by activating the utilities one at a time or in small groups. If this is not possible,
decrease the values of the MOP thresholds.
During start-up the unit
switches off due to low
pressure (units with on-board
compressor only)
The “Circuit/EEV ratio” parameter is too low Increase the value of the “Circuit/EEV ratio” parameter.
The driver is not set correctly in STAND ALONE Check that the strand alone parameter is activated.
The driver digital input is not connected correctly Check the connection of the digital input.
LOP protection disabled Activate the LOP protection by setting the threshold to the required saturated evaporation temperature (between
the operating temperature and the calibration of the low pressure switch) and the LOP integral time to a value
greater than 0 (recommended 4sec)
LOP protection ineffective Make sure that the LOP threshold is at the required saturated evaporation temperature (between the operating
temperature and the calibration of the low pressure switch) and decrease the value of the LOP integral time.
Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the operation of the relay.
Insuffi cient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion valve. Check that the
subcooling is suitable (greater than 5°C). Charge the circuit.
Valve blocked closed Use manual control to close and open the valve completely. If the superheat remains high, check the electrical
connections and/or replace the valve.
The unit switches off due to low
pressure during control (units
with on-board compressor
only)
LOP protection disabled Activate the LOP protection by setting the threshold to the required saturated evaporation temperature (between
the operating temperature and the calibration of the low pressure switch) and the LOP integral time to a value
greater than 0 (recommended 4sec)
LOP protection ineffective Make sure that the LOP threshold is at the required saturated evaporation temperature (between the operating
temperature and the calibration of the low pressure switch) and decrease the value of the LOP integral time.
Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the operation of the relay.
Insuffi cient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion valve. Check that the
subcooling is suitable (greater than 5 °C). Charge the circuit.
Valve blocked closed Use manual control to close and open the valve completely. If the superheat remains high, check the electrical
connections and/or replace the valve.
The showcase does not reach
the set temperature, despite the
value opening to the maximum
(for showcases only)
Solenoid blocked Check that the solenoid opens correctly, check the electrical connections and the operation of the relay.
Insuffi cient refrigerant Check that there are no bubbles of air in the liquid indicator upstream of the expansion valve. Check that the
subcooling is suitable (greater than 5 °C). Charge the circuit.
Valve blocked closed Use manual control to close and open the valve completely. If the superheat remains high, check the electrical
connections and/or replace the valve.
The showcase does not reach
the set temperature, and the
position of the valve is always
to 0 (for showcases only)
The driver is not set correctly in STAND ALONE Check that the strand alone parameter is activated.
The driver digital input is not connected correctly Check the connection of the digital input.
32
Fig. 1
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Below is a description of how to install and use the EVD4-UI confi guration and monitoring program
I.I Installation
To install the program:
- download the required EVD4_UI*.zip fi le from http:\\KSA.Carel.com;
- copy the contents of the EVD4_UI*.zip fi le to the required path on the PC (e.g.: C:\Program Files);
- the fi rst time that the program is used, edit the Destination item under the Link properties by entering
the path used on the PC:
I.II Preparing the connections
Connect the CVSTDUTTL0 converter to the EVD4 controller, as explained in § 2.5.
I.III Preparing the user interface
The program does not require installation; simply copy the entire contents of the distribution directory to
the required location on the hard disk. The program cannot run from the CD as it requires write access
to the confi guration fi les.
Open the IN\EVD400UI.INI fi le from the path where EVD4_UI.exe is located and make sure that the
Paddr parameter is set to 1.
Start the EVD4_UI program using the shortcut icon to the application (see VII Confi gurations available)
and not the EVD4_UI.exe fi le, then press
and set:
• Port = COM address of the serial port used to connect the CVSTD*TTL0
• Baud Rate = 4800
• Parity = NO PARITY
• Byte Size = 8
• Stop Bits = 1
Press
.
Now, if the converter is connected to an EVD
4
, image of the driver will be displayed in the top left and,
the EVD version window will show the following data
• Firmware rev. = = fi rmware version of the EVD
4
connected
• Param key rev. = parameter key version (for future use)
• Hardware rev. = hardware version
• Network address = network address of the main serial port
I.IV Saving the data
Pressing will open a dialogue box to save the entire memory of the EVD4:
choose a path and enter a name with the extension *.CFG, then press
.
APPENDIX I. INSTALLING AND USING THE EVD4-UI PROGRAM
33
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
I.V Loading the data
Pressing
will open a dialogue box to read a fi le with the extension *.CFG:
choose a fi le and press
, all the data will be displayed in the various windows of the
EVD400UI program.
To transfer the data to the EVD
4
press , the function in this case has no action
I.VI Modifying the parameters
To modify a numerical parameter:
• check the box containing the value of the parameter
• click the right mouse button
• set the new value
• ENTER
To reverse the value of a digital parameter (red or green rectangle):
• check the box containing the value of the parameter
• click the right mouse button
Meaning of the red or green rectangle:
- GREEN = FALSE or OFF or 0 or DISABLED, in relation to the meaning of the reference parameter
- RED = TRUE or ON or 1 or ENABLED, in relation to the meaning of the reference parameter
if the
checkbox is selected, the data is sent to EVD4 immediately after having been
modifi ed, otherwise, after having modifi ed all the required data, press
I.VII Confi gurations available
The software used to install EVD4_UI is available in the following confi gurations:
- “EVD4_UI Address”, to set the address of the EVD
4
- “EVD4_UI Key”, to program the key
- “EVD4_UI Stand Alone” to program the stand-alone EVD
4
- “EVD4_UI MCH2” to program the EVD
4
with µC
2
- “EVD4_U positioner” to use the EVD4 as a positioner with 4 to 20 mA or 0 to 10 Volt
This box is used to set the Driver+Valve system confi guration values.
These parameters should be set and checked before activating the unit.
34
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
APPENDIX II. DESCRIPTION OF THE PARAMETERS
Parameter PV address Default
EVD%40%
and
EVD%43%
Default
EVD%41%
and
EVD%44%
Default
EVD%42%
and
EVD%45%
Description UI Meaning
µC2 off line D 24 0 0 0 active when µC2 is not connected to
EVD
4
The tLAN communication has been interrupted or has not been restored, see the
WARNING in par. 3.1.1
100% capacity D 26 0 0 0 active when the capacity of the circuit
is 100%
µC
2
has brought the capacity of the compressor to 100%, the information is sent to
EVD
4
so as to preposition the electronic expansion valve
50% capacity D 25 0 0 0 active when the capacity of the circuit
is 50%
µC2 has brought the capacity of the compressor to 50%, the information is sent to
EVD
4
so as to preposition the electronic expansion valve
Act. SH set A 10 0 0 0 current superheat set point This is equal to CH-Superheat set (or similar for HP or DF), corrected if necessary by
the safety devices and/or the modulation, read-only
Alarm Eeprom error D 42 0 0 0 active following an EEPROM memory
error
Fault in the EEPROM memory, the system may request a GO AHEAD; contact the
Carel technical service if the origin of the error is not clear
Alarm HiT asp D 46 0 0 0 active in conditions with excessive
suction temperature
The temperature measured by the EVD
4
probe has exceeded the threshold value set
for the High superheat alarm threshold for a time greater than the Alarms delay High
SH, check if the delay confi gured is suitable for the application
Alarm LOP timeout D 45 0 0 0 active in conditions with insuffi cient
evaporation pressure
Active in conditions with insuffi cient evaporation pressure, that is, when LOP is lower
than the set threshold for LOP Cool Mode (or LOP Defr. Mode or LOP Heat Mode) for
a time greater than the Alarms delay LOP, check if the delay confi gured is suitable for
the application
Alarm Low
Superheat
D 41 0 0 0 active in low superheat conditions Active when the SH measured is lower than the set threshold for CH-Low Superheat
(or similar for HP or DF) for a time greater than the Alarms delay Low SH, check if the
timeout is suitable for the application
Alarm MOP timeout D 44 0 0 0 active in conditions with excessive
evaporation pressure
Active in conditions with excessive evaporation pressure, that is, when MOP is greater
than the set threshold for MOP Cool Mode (or MOP Defr. Mode or MOP Heat
Mode) for a time greater than the MOP delay, check if the timeout is suitable for the
application
Alarm probe error D 43 0 0 0 active following an error on the signal
from the probe
The driver interprets a signal from the sensor that is outside of a determined range of
operation as being a probe error; the interval depends on the type of probe and the
input used, as described in table A. The system may request a GO AHEAD; contact the
Carel technical service if the origin of the error is not clear
Alarms delay
High SH
I 55 0 0 0 high superheat temperature alarm delay
in CH mode
This is the time that passes from when High superheat alarm threshold is continuously
exceeded to when the user wants the error to be displayed and/or managed
Alarms delay LOP I 53 60 60 120 low evaporation pressure (LOP) alarm
delay
This is the time that passes from when the superheat temperature is continuously
less than the value set for LOP cool mode (or LOP Defr. Mode or LOP Heat Mode) to
when the user wants the error to be displayed and/or managed
Alarms delay
Low SH
I 52 60 60 120 low superheat alarm delay This is the time that passes from when the value of superheat is continuously less than
the value set for CH-Low Superheat (or similar for HP or DF) to when the user wants the
error to be displayed and/or managed
Alarms delay MOP I 54 0 0 0 high evaporation pressure (MOP)
alarm delay
This is the time that passes from when the superheat temperature is continuously
greater than the value set for MOP cool mode (or MOP Defr. Mode or MOP Heat
Mode) to when the user wants the error to be displayed and/or managed
Alarms delay probe
error
I 48 10 10 10 probe error alarm delay This is the time that passes from when the Alarm probe error is continuously active to
when the user wants the error to be displayed and/or managed
Aux reg. I 56 0 0 0 type of auxiliary PID control “0 = no auxiliary control1 = enable high condensing temperature protection (see Hi
Tcond. protection)”
Aux. probe confi g. I 69 auxiliary probe confi guration “Confi gured from pCO, this fi eld defi nes the third probe on the EVD
4
, the probe is
read only and sent to the pCO. The read options and the probes available depend on
the control settings:
- NTC
- NTCht
- Pt1000
- Pressure”
Aux. probe limits
Max
I 44 9,3 9,3 9,3 ratiometric end scale pressure S2 Value corresponding to 100% of the pressure read by the ratiometric probe connected
to channel S2
Aux. probe limits
Min
I 43 -1 -1 -1 ratiometric zero pressure S2 Value corresponding to 0% of the pressure read by the ratiometric probe connected
to channel S2
Battery presence I 63 enable valve not closed error used if EVD
4
is installed with a backup battery, enables the EEV not closed error (see
the corresponding description of the parameter), from pCO
Blocked valve check I 51 0 0 0 time after which the valve is considered
as being blocked
If SH is high and the valve is open or if SH is low and the valve is closed, the valve
may be considered blocked. This parameter defi nes the delay before performing,
respectively, a forced closing or a forced opening.
Calibr. S4 gain mA I 111 0 0 0 current gain on channel S4 This is the correction to the end scale in the calibration of channel S4, used to receive
a 4-20 mA signal when the driver is operating as a positioner
Calibr. S4 gain Volt I 113 0 0 0 voltage gain on channel S4 This is the correction to the end scale in the calibration of channel S4, used to receive a
0-10 Volt signal when the driver is operating as a positioner
Calibr. S4 offs mA I 112 0 0 0 current offset on channel S4 This is the correction to the deviation from zero in the calibration of channel S4, used
to receive a 4-20 mA signal when the driver is operating as a positioner
Calibr. S4 offs Volt I 114 0 0 0 voltage offset on channel S4 This is the correction to the deviation from zero in the calibration of channel S4, used
to receive a 0-10 Volt signal when the driver is operating as a positioner
In this square the Driver+Valve system confi guration values are set.
These parameters have to be set and checked before starting up the unit.
Key:
= Main parameters required to start operation;
= Secondary parameters required for optimum operation.
35
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Capacity control EVD4 macroblock parameter that defi nes
the type of compressor control
“According to the type of compressor control selected, the macroblock calculates the
proportional factor, which will be entered indiscriminately for the parameters CHProportional gain, HP-Proportional gain and DF-Proportional gain. Multiple choice:
- “”none or stages”” if the compressor is without capacity control or with step control
- “”continuous slow”” for screw compressors with slider control
- “”continuous fast”” for compressors with inverter control”
CH-Circuit/EEV
Ratio
I 20 percentage of the maximum capacity
managed by the valve
This is the ratio between the maximum cooling capacity delivered by the valve and
the maximum in the circuit, in cooling or CH mode, if managed. Used to pre-position
the valve when starting and/or changing capacity (if possible), sent by the pCO or
µC
2
controller (e.g. if the ratio is 40% and if the capacity of the system changes to
1/2 of the current level, the pCO or µC
2
tells the driver to preposition the valve at half
of 40%, that is, equal to 20% of the total capacity of the valve, minus the Dynamic
proportional gain factor), once the driver has completed pre-positioning, independent
SH control will commence
CH-Integral time A 28 30 30 80 integral time for superheat control This is the time of the PID integration action, increasing the value the SH reaches
the set point more slowly but avoids excessive swings. This depends on the type of
evaporator and the inertia of the circuit. If HP and DF modes are also available, this
refers to control in CH mode
CH-Low Superheat A 43 2,5 2,5 6 low superheat value This is the minimum SH value below which the system activates the Alarm Low Supe-
rheat after the Alarms delay Low SH. This is used to avoid an excessively low pressure
difference between the condenser and evaporator circuits, which may cause liquid at
the compressor intake. If HP and DF modes are also available, this refers to control in
CH mode
CH-Proportional
gain
A 25 3 2,5 7 PID proportional factor This is the PI D proportional factor, increasing the value increases the reactivity of the valve and
therefore of SH control, however for high values control may become unstable. This depends
on the ratio between circuit capacity and valve capacity and on the maximum number of valve
control steps. If HP and DF modes are also available, this refers to control in CH mode
CH-Superheat set A 22 6 6 10 superheat set point Superheat set point. If HP and DF modes are also available, this refers to control in CH
mode. Do not set excessively low values (less than 5°C) or too near the low superheat
limit (at least 3°C difference).
Closing extra steps I 63 enable extra steps in closing Enables the extra steps function when closing: when the driver closes the valve but
the SH value measured is not coherent (too low), the driver realises that the valve is
not completely closed and forces some extra closing steps at preset intervals, until the
SH reaches coherent values. Maximum steps/128 are completed every second. Used
by pCO.
Closing steps I 24 500 500 500 steps completed in total closing Number of steps that the driver uses to totally close the valve (not during control)
Compressor or unit macroblock parameter that defi nes the
integral time
“Identifi es the type of unit/compressor that the expansion valve is used on.
This selection optimises the PID control parameters and the auxiliary Driver protectors,
considering the control characteristics of the various types of system.
1 Reciprocating
2 Screw
3 Scroll
4 Flooded cabinet
5 Cabinet“
Cond. probe press. A 12 0 0 0 condensing pressure value measured Condensing pressure value measured, from µC
2
or pCO
Cond. probe sat.
temp.
A 9 0 0 0 saturated gas temperature in the
condenser
Saturated gas temperature value calculated in the condenser, from µC2 or pCO
STEPCOUNTH I 95 0 0 0 step counter high word Step counter in hexadecimal format, high part
STEPCOUNTL I 94 0 0 0 step counter low word Step counter in hexadecimal format, low part
Cool macroblock parameter that defi nes the
integral time
“Identifi es the type of exchanger used as the evaporator in cooling mode:
1 Plates
2 Shell&tube
3 Fast fi nned
4 Slow fi nned
This selection optimises the PID control parameters and the auxiliary Driver protectors,
considering the control characteristics of the various types of system.“
Derivative time A 31 1 1 1 PID derivative time This is the time of the PID derivative action, increasing the value decreases swings but
bring fl uctuations vibrations around the SH set point.
DF-Circuit/EEV Ratio I 20 percentage of the maximum capacity
managed by the valve in DF mode,
from pCO
This is the ratio between the maximum cooling capacity delivered by the valve and
the maximum in the circuit, in DF mode. Used to pre-position the valve when starting
and changing capacity, sent by the pCO or µC
2
controller (e.g. if the capacity of the
system changes to 50%, the pCO or µC
2
tells the driver to preposition the valve at
50% of its total travel, minus the Dynamic proportional gain factor, then the driver will
commence independent SH control), from pCO or µC
2
.
DF-Integral time A 30 30 30 30 integral time for superheat control in
DF mode
This is the time of the PID integration action in the operation in DF mode, increasing
the value the SH reaches the set point more slowly but avoids excessive swings. This
depends on the type of evaporator and the inertia of the circuit.
DF-Low Superheat A 45 4 4 4 low superheat value in DF mode This is the minimum SH value below which the system activates the Alarm Low
Superheat after the Alarms delay Low SH in the operation in DF mode. This is used to
avoid an excessively low pressure difference between the condenser and evaporator
circuits, which may cause liquid at the compressor intake.
DF-Proportional
gain
A 27 4 4 4 PID proportional factor in DF mode This is the PID proportional factor per operation in DF mode, increasing the value in-
creases the reactivity of the valve and therefore of SH control, however for high values
control may become unstable. This depends on the ratio between circuit capacity and
valve capacity and on the maximum number of valve control steps.
DF-Superheat set A 24 10 10 10 superheat set point in DF mode Superheat set point in operation DF
Digital input 1 D 17 0 0 0 status of digital input 1 Checks the status of digital input 1 (enabled or disabled)
Digital input 2 D 18 0 0 0 status of digital input 2 Checks the status of digital input 2 (enabled or disabled)
DOUT2 D 21 0 0 0 relay output control Variable that checks and/or signals the opening or closing of the relay, 0 = open, 1 =
closed
Driver X high
superheat
driver X with high superheat EVD200 alarm, driver X with high superheat, checks the sensors on driver X
DriverX mode operating mode of the X-th driver Operating mode of the X-th driver (CH, HP, DF), from pCO
Duty cycle I 29 30 30 30 motor duty cycle Duration of the control signal sent by the driver to the valve in one second, as a
percentage (100% = continuous signal)
36
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EVD4 +030220227 - rel. 2.1 - 12.06.2008
Dynamic proportional gain
I 71 0,6 0,6 0,6 attenuation coeffi cient with change in
capacity
Parameter active for each change in capacity of the circuit: when the driver pre-positions the valve (see CH-Circuit/EEV Ratio, HP-Circuit/EEV Ratio, and DF-Circuit/EEV
Ratio); the difference between the initial and the fi nal position is multiplied by value
of this parameter, between 0 and 1, and the effect of the change in capacity on the
SH is attenuated.
EEV mode man. D 68 0 0 0 enable/disable manual valve positioning Enables/disables manual valve positioning, eliminating the activation of any control
or alarm
EEV not closed D 47 0 0 0 active due to failed valve closing If the EVD400 is installed with a backup battery, in the event of mains power failures
or no communication with the controller for more than 30 sec, the valve is closed.
If during this procedure EVD400 cannot control all the steps to close the valve due
to lack of backup power (fl at battery), when restarting the EEV not closed error is
displayed, with the consequent Go ahead request
EEV opening A 17 0 0 0 valve opening as a % Controlled opening of the valve as a %
EEV position I 15 0 0 0 calculated valve opening position Calculated opening of the valve, in steps
En. positioner I 63 enable/disable manual positioner
function
Enables/disables the manual positioner function, from pCO
Enable reset to
default
I 1 0 0 0 enable restore default parameters If set to 14797, allows the user to reset all the parameters to the default values by
enabling the Reset to default variable
Ev. probe press. A 14 0 0 0 evaporation pressure value measured Value measured by the evaporation pressure probe
Ev. probe sat. temp. A 16 0 0 0 saturated gas temperature value calcula-
ted in the evaporator
Saturated gas temperature value calculated in the evaporator, taken from the evapora-
tion pressure on the Mollier chart
Evaporator type
cool
type of evaporator in CH mode “Identifi es the type of exchanger used as the evaporator in cooling mode:
1 • Plates
2 • Shell&tube
3 • Fast fi nned
4 • Slow fi nned
This section confi gures the integral time in the PID control parameters.”
Evaporator type
heat
type of evaporator in HP mode “Identifi es the type of exchanger used as the evaporator in heating mode:
1 • Plates
2 • Shell&tube
3 • Fast fi nned
4 • Slow fi nned
This section confi gures the integral time in the PID control parameters.”
EVD probes type I 69 0 0 0 type of sensors used “Number that indicates the combination of sensors used to calculate the superheat
value; the default value 51 corresponds to a ratiometric probe connected to S1 and
a 103 AT NTC sensor temperature to S3. For other connections, set the value of the
parameter according to the following formula:
EVD probes type = CFGS1 + 5 * CFGS2 + 25 * CFGS3where:
CFGS1 (probe on channel S1) = 0, 1 or 2
CFGS2 (probe on channel S2) = 0, 1, 3 or 4
CFGS3 (probe on channel S3) = 0, 1 or 2
and:
0 = no measurement
1 = ratiometric pressure
2 = NTC 103AT (10000 ohm at 25 °C)
3 = NTC IHS (50000 ohm at 25 °C)
4 = Pt1000”
EVD type model of EVD used Model of EVD used, from pCO
EVD version H.W I 100 0 0 0 driver hardware version Driver hardware version
EVD version S.W I 100 0 0 0 software version installed on the driver Software version installed on the driver
Force D 8 0 0 0 send a FORCE command to the EVD Transmission of all the parameters or variables
Functional test D 2 0 0 0 functional test The functional test is a status of the driver that is used to check the operation of the
device, and in particular to calibrate a number of variables
Go ahead D 35 0 0 0 enable restart following error “When the driver signals one of the following errors:
- Probe error alarm
- EEPROM error alarm
- EEV not closed
authorisation is requested continue after the user has checked the existence and the
seriousness of the problem.”
Heat type of evaporator in HP mode “Identifi es the type of exchanger used as the evaporator in heating mode:
1 • Plates
2 • Shell&tube
3 • Fast fi nned
4 • Slow fi nned
This section confi gures the integral time in the PID control parameters.“
Hi TCond. int. time A 36 0 0 0 integral time for high condensing
temperature control (HiTcond)
Integral time for high condensing temperature control, see Hi TCond. protection
Hi TCond.
protection
A 40 80 80 80 maximum condensing temperature Maximum condensing temperature; once exceeded, the driver starts controlling
the valve position based on this set point and considering the Hi TCond. int. Time
parameter
High superheat
alarm threshold
A 37 200 200 200 maximum superheat temperature Maximum superheat temperature. If HP and DF modes are also available, this refers
to control in CH mode
High Tc status D 53 0 0 0 active when in high condensing tempe-
rature control status
Active when in high condensing temperature control mode, see Hi TCond. protection
HP-Circuit/EEV
Ratio
I 20 percentage of the maximum capacity
managed by the valve in HP mode,
from pCO
This is the ratio between the maximum cooling capacity delivered by the valve and
the maximum in the circuit, in HP mode. Used to pre-position the valve when starting
and changing capacity, sent by the pCO or µC
2
controller (e.g. if the capacity of the
system changes to 50%, the pCO or µC
2
tells the driver to preposition the valve at
50% of its total travel, minus the Dynamic proportional gain factor, then the driver will
commence independent SH control), from pCO or µC
2
.
HP-Integral time A 29 35 35 200 integral time for superheat control in
HP mode
This is the time of the PID integration action for operation in HP mode, increasing
the value the SH reaches the set point more slowly but avoids excessive swings. This
depends on the type of evaporator and the inertia of the circuit.
HP-Low Superheat A 44 3 3 6 low superheat value in HP mode This is the minimum SH value below which the system activates the Alarm Low
Superheat after the Alarms delay Low SH in the operation in HP mode. This is used to
avoid an excessively low pressure difference between the condenser and evaporator
circuits, which may cause liquid at the compressor intake.
37
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
HP-Proportional
gain
A 26 3 3 3 PID proportional factor in HP mode This is the PID proportional factor for operation in HP mode, increasing the value in-
creases the reactivity of the valve and therefore of SH control, however for high values
control may become unstable. This depends on the ratio between circuit capacity and
valve capacity and on the maximum number of valve control steps.
HP-Superheat set A 23 7 7 10 superheat set point in HP mode Superheat set point in HP mode
KEY1 I 1 0 0 0 special functions “If set to 14797, allows the user to reset all the parameters to the default values, by
enabling the Reset to default variable. If set to 19157, allows the user to remain in
functional test mode, enabling the Functional test variable within 30 s from when the
driver is switched on (see the paragraph “”Application as positioner”” in the EVD400
Manual)”
KEY11 I 11 0 0 0 enable write advanced valve parameters
if set to 24717 (Service only)
Enable write advanced valve parameters if set to 24717 (Service only)
KEY12 I 14 0 0 0 special functions If set to 12233 within 250 s from when the driver is switched on, disables the termina-
tion of the functional test by timeout (see the paragraph “Application as positioner” in
the EVD400 Manual)
LOP Cool Mode A 50 -5 -5 -45 temperature at minimum operating
pressure (MOP) in CH mode
Temperature at the minimum operating pressure allowed at the evaporator outlet, in
CH mode. When the temperature is less than the set threshold, the system goes into
LOP status, activating the LOP status digital variable and LOP control: the driver stops
SH control and starts controlling the valve position so as to reach the LOP set point,
considering the LOP integral time parameter. The driver resumes SH control when the
temperature returns above the set threshold.
LOP Defr. Mode A 52 -30 -30 -30 temperature at minimum operating
pressure (LOP) in DF mode
Temperature at the minimum operating pressure allowed at the evaporator outlet, in
DF mode. When the temperature is less than the set threshold, the system goes into
LOP status, activating the LOP status digital variable and LOP control: the driver stops
SH control and starts controlling the valve position so as to reach the LOP set point,
considering the LOP integral time parameter. The driver resumes SH control when the
temperature returns above the set threshold.
LOP Heat Mode A 51 -25 -20 -45 temperature at minimum operating
pressure (LOP) in HP mode
Temperature at the minimum operating pressure allowed at the evaporator outlet, in
HP mode. When the temperature is less than the set threshold, the system goes into
LOP status, activating the LOP status digital variable and LOP control: the driver stops
SH control and starts controlling the valve position so as to reach the LOP set point,
considering the LOP integral time parameter. The driver resumes SH control when the
temperature returns above the set threshold.
LOP integral time A 34 1,5 1,5 0 integral time for low evaporation
pressure control (LOP)
Integral time for low evaporation pressure (LOP) control, see LOP cool mode
LOP status D 50 0 0 0 active when in minimum evaporation
pressure control status
Active when in LOP control status, see LOP cool mode
Low SH int. time A 33 1 1 15 integral time for low superheat control Integral time for low superheat control, see CH-Low Superheat
Low SH status D 52 0 0 0 active when in low superheat control
status
Active when the superheat measured is lower than CH-Low Superheat (or similar in
HP or DF mode)
Maximum steps I 23 480 480 480 maximum control steps Position beyond which the valve is considered completely open
Minimum steps I 22 30 30 30 minimum control steps Position below which the valve is considered closed. This parameter is only used
during repositioning (see CH-Circuit/EEV Ratio)
MODE I 16 0 0 0 READ ONLY, received from µC
2
“Received from µC2, describes the type of cycle that the main controller is managing:
0 = cooling (CH)
1 = heating (HP)
2 = defrost (DF)
3 = pump-down”
MOP Cool Mode A 53 12 80 80 temperature at maximum operating
pressure (MOP) in CH mode
Temperature at the maximum operating pressure allowed at the evaporator outlet, in
CH mode. When the temperature is greater than the set threshold, the system enters
MOP status, activating the MOP status digital variable and MOP control: the driver
stops SH control and starts controlling the valve position so as to reach the MOP set
point, considering the MOP integral time parameter. The driver resumes SH control
when the temperature returns below the set threshold.
MOP Defr. Mode A 55 30 30 30 temperature at maximum operating
pressure (MOP) in DF mode
Temperature at the maximum operating pressure allowed at the evaporator outlet, in
DF mode. When the temperature is greater than the set threshold, the system enters
MOP status, activating the MOP status digital variable and MOP control: the driver
stops SH control and starts controlling the valve position so as to reach the MOP set
point, considering the MOP integral time parameter. The driver resumes SH control
when the temperature returns below the set threshold.
MOP Heat Mode A 54 12 12 80 temperature at maximum operating
pressure (MOP) in HP mode
Temperature at the maximum operating pressure allowed at the evaporator outlet, in
HP mode. When the temperature is greater than the set threshold, the system enters
MOP status, activating the MOP status digital variable and MOP control: the driver
stops SH control and starts controlling the valve position so as to reach the MOP set
point, considering the MOP integral time parameter. The driver resumes SH control
when the temperature returns below the set threshold.
MOP integral time A 35 2,5 2,5 0 integral time for high evaporation
pressure control (MOP)
Integral time for high evaporation pressure (MOP) control, see MOP cool mode
MOP startup delay I 49 60 60 60 MOP delay time when starting control When the system is started, the evaporation pressure is high and may exceed the set
MOP threshold. The duration of the MOP delay time can be set when starting the
controller
MOP status D 49 0 0 0 active when in maximum evaporation
pressure control status
Active when in MOP control status, see MOP cool mode
Net address I 21 2 30 250 network address Network address
NUMRESTART I 91 0 0 0 EVD
4
start counter (power supply). EVD4 start counter (power supply) and reset.
NUMVALVECLOSE I 93 0 0 0 valve closing counter. Valve closing counter.
NUMVALVEOPEN I 92 0 0 0 EVD4 start counter with valve error. EVD4 start counter with valve error.
Off SH cl A 46 0 0 10 superheat offset with modulating
temperature in CH mode
Superheat offset with modulating temperature in CH mode
Open relay low SH D 60 1 0 1 enable/disable relay opening following
low superheat
Enables/disables the opening of the relay when the driver is in Low SH status
Open relay MOP D 61 0 0 0 enable/disable relay opening following
MOP
Enables/disables the opening of the relay when the driver is in MOP status
Opening extra steps I 63 enable extra steps in opening When the valve has reached the 100% of the control steps in opening, as set by
the parameters for each valve or the Maximum steps parameter, and the procedure
requires further opening, the driver attempts to further open the valve by controlling
[Maximum steps/128] steps every second, if this parameter is enabled. In addition,
allows any steps lost during control, when opening, to be recovered. Used by pCO
Phase current I 27 450 450 450 peak current per phase Peak current that the driver supplies to each valve control phase
38
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EVD4 +030220227 - rel. 2.1 - 12.06.2008
Power request cooling capacity Reading of the cooling capacity, from pCO
Probes offset S1 A 1 0 0 0 correction of S1 Correction of the value measured by sensor S1
Probes offset S2 A 2 0 0 0 correction of S2 Correction of the value measured by sensor S2
Probes offset S3 A 3 0 0 0 correction of the lower limit of S3 Correction of the value measured by sensor S3
Refrigerant I 50 4 3 2 number indicating the type of refrige-
rant used
“Type of refrigerant (consult the electronic expansion valve technical documentation
to check the complete valve-driver
system compatibility with the chosen refrigerant):
1 = R22
2 = R134a
3 = R404a
4 = R407c
5 = R410a
6 = R507a
7 = R290
8 = R600
9 = R600a
10 = R717
11 = R744
12 = R728
13 = R1270”
Regulation I 200 READ ONLY, received from µC
2
READ ONLY, received from µC
2
Regulation type I 17 0 0 0 type of control “Type of control, if EEV man. mode is not enabled:
0 = standard PID with protectors
1 = simple PID without protectors
2 = positioner on S4
In positioner mode, the activation of any control or alarm is disabled: the driver
positions the valve between 0 and the Maximum steps proportionally to a signal on
input S4 (see the instruction sheet), either 0-10 Volt or 4-20 mA”
Re-install AUTOSETUP values
confi rm enable restore default parameter values
Confi rms the reset of default parameter values, based on the information entered for
the System Set group of parameters from the pCO
Relay stdby D 58 0 0 0 relay status in standby, in stand-alone
mode
Relay status in standby (unit powered but capacity demand equal to 0) when the
driver operates in stand-alone mode: normally the relay is open, if 1 the relay is closed
Requested steps I 62 0 0 0 required motor position in manual
control
Required position of the motor in manual control
Reset to default D 1 0 0 0 restore the values of the parameters to
the default, tLAN version
Restores the parameters to the internal default values if Enable reset to default or
KEY1 are equal to 14797, tLAN version
S1 probe limits Max I 42 9,3 9,3 9,3 end scale for pressure sensor on
input S1
Pressure value corresponding to the maximum of ratiometric output S1 (4.5 V).
S1 probe limits Min I 41 -1 -1 -1 ‘zero’ scale for pressure sensor on
input S1
Pressure value corresponding to the minimum of ratiometric output S1 (0.5 V).
S2-Pt1000 calib. I 68 0 0 0 calibration index for PT1000 sensor Calibration value engraved on the metallic body of the probe, minus 1000.0.
S4 probe type I 36 0 0 0 type of probe on channel S4 “Number that indicates the type of sensor connected to input S4:
0 = no measurement
5 = 4-20 mA
6 = 0-10 V”
S4 signal A 7 0 0 0 signal on input S4 Reading of the input signal on S4
SHeat dead zone A 32 0 0 0 dead zone for PID control Value that defi nes an interval around the SH set point: if the SH measured is within
this interval, the driver stops control and the valve will not perform any movements;
control resumes when the superheat value is outside of the dead zone.
Stand alone D 67 0 0 1 enable StandAlone Enables the StandAlone function from µC2 or supervisor, the driver will operate in this
mode if digital input ID1 is enabled
Stand alone I 63 enable StandAlone Enables StandAlone from pCO, the driver will operate in this mode if digital input ID1
is enabled
Standby steps I 25 5 5 5 number of valve back steps Number of the steps for reopening the valve after complete closing, to release the
end spring
Steprate I 26 100 100 100 motor speed Speed of the stepper motor, in steps/s
Still current I 28 120 120 120 current with the motor off Current running through the motor when stationary
Suction temp. A 13 0 0 0 value measured by the suction tempe-
rature sensor
Value measured by the suction temperature sensor
Superheat A 15 0 0 0 superheat value measured Value of the superheat calculated on the Mollier chart using the suction temperature
and evaporation pressure values
T diff cl A 48 3 3 3 temperature differential with modulating
thermostat in CH mode
Differential temperature with modulating thermostat in CH, equal to the proportional
band
TX not fi ltered D 54 0 0 1 enable complete TX on TLAN/485 Set to 0, limits transmission on the main serial port only to the variables required for
the operation with the microchiller.
VAC D 19 0 0 0 alternating current power supply status Read-only, if 0 the power supply is present, if 1 it is not present.
Valve alarm D 70 1 1 1 enable/disable valve alarm Enables/disables the valve alarm (valve not closed at shutdown alarm), see EEV not
closed
39
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
Valve type I 30 0 0 0 number that defi nes the type of electro-
nic valve used
“Number that defi nes the type of electronic valve used and selects the motor operating parameters from a table.
The following valves are supported:
0 = CAREL E2V
1 = Sporlan SEI 0.5-20
2 = Sporlan SEI 30
3 = Sporlan SEH 50-250
4 = Alco EX5-EX6
5 = Alco EX7
6 = Alco EX8 330 step/s
7 = Alco EX8 500 step/s
8 = Danfoss ETS-25/50
9 = Danfoss ETS-100
10 = CAREL E2V*P
11 = Danfoss ETS-250/400
>12 and <99 = direct setting of the parameters (custom valve)”
XPA D 65 0 0 1 enable extra steps in opening When the valve has reached the 100% of the control steps in opening, as set by
the parameters for each valve or the Maximum steps parameter, and the procedure
requires further opening, the driver attempts to further open the valve by controlling
[Maximum steps/128] steps every second, if this parameter is enabled. The procedure
is stopped if the condition persists for [Maximum steps/3] steps. In addition, allows
any steps lost during control, when opening, to be recovered.
XPC D 66 0 0 1 enable extra steps in closing Enable the extra steps function when closing: when the driver closes the valve but
the SH value measured is not coherent (too low), the driver realises that the valve is
not completely closed and attempts to close it by performing [Maximum steps/128]
steps every second, until the SH reaches coherent values. The procedure is stopped if
the condition persists for [Maximum steps/3] steps. In addition, allows any steps lost
during control, when closing, to be recovered.
Note “SH = superheat
CH = chiller mode
HP = heat pump mode
DF = defrost mode
MOP = maximum operating pressure
LOP = lowest operating pressure
HiT = high temperature
EEV = electronic expansion valve
GREEN or FALSE or OFF or 0 or DISABLED have the same meaning, in relation to the
meaning of the reference parameter
RED or TRUE or ON or 1 or ENABLED have the same meaning, in relation to the
meaning of the reference parameter”
Note: SH= superheat
CH= chiller mode;
HP= heat pump mode;
DF= defrost;
MOP= Maximum Operating Pressure;
LOP= Lowest Operating Pressure;
HiT= High Temperature);
EEV= Electronic Expansion Valve;
GREEN or FALSE or OFF or 0 or DISABLED have the same meaning, in relation to the meaning of the reference parameter;
RED or TRUE or ON or 1 or ENABLED have the same meaning, in relation to the meaning of the reference parameter”.
WARNING!
All the parameters corresponding to integral and derivative times, if set to 0, disable the corresponding function.
Raziom. NTC 103AT NTC IHS Pt1000 4...20 mA 0...10 V
limits min 0,3 +99 °C +153 °C -60 °C 3 mA 0 V
MAX 4,7 -57 °C -25 °C +161 °C 22 mA 11 V
limits if applied to inputs other than those
recommended (see Chapter 4)
min 204,7 °C 69,9 °C +2220 °C
MAX -13,6 °C -59,2 °C +6650 °C
40
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
APPENDIX III. PARAMETER SETTINGS
Application Refrigerant* Valve type S1 probe limits
Min [bar]
S1 probe limits
Max [bar]
“CH Circuit
EEV ratio”
CH Superheat
set [°C]
CH Proportional gain CH Integral
time [sec]
“Derivative
time [sec]”
Chiller
NB consider double CH
Proportinal Gain in case
of Inverter or Stepless
Compressor
1 = R22;
2 = R134a;
3 = R404a;
4 = R407c;
5 = R410a;
6 = R507a;
7 = R290;
8 = R600;
9 = R600a;
10 = R717;
11 = R744;
12 = R728;
13 = R1270
0 = CAREL E2V
1 = Sporlan SER 0.5-20
2 = Sporlan SEI 30
3 = Sporlan SEH 50-250
4 = Alco EX5-EX6
5 = Alco EX7
6 = Alco EX8 330 step/s
7 = Alco EX8 500 step/s
8 = Danfoss ETS-25/50
9 = Danfoss ETS-100
10 = CAREL E2V*P
11 = Danfoss ETS-250/400
> 12 Custom
See pressure probe technical leafl et
See pressure probe technical leafl et
70 6
CAREL E2V = 4
Alco Ex5/6 = 7
Sporlan 0.5/20, Alco Ex7 = 10
Sporlan 30, Alco Ex8, Danfoss
ETS = 25
Sporlan 50/250 = 45
35
1
Chiller low temperature
NB consider double CH
Proportinal Gain in case
of Inverter or Stepless
Compressor
70 6
CAREL E2V = 3
Alco Ex5/6 = 6
Sporlan 0.5/20, Alco Ex7 = 12
Sporlan 30, Alco Ex8, Danfoss
ETS = 18
Sporlan 50/250 = 35
30
Cold room packaged
50 6
CAREL E2V = 3
Alco Ex5/6 = 6
Sporlan 0.5/20, Alco Ex7 = 8
Sporlan 30, Alco Ex8, Danfoss
ETS = 18
Sporlan 50/250 = 35
50
Cold room centralized
50 6
CAREL E2V = 7
Alco Ex5/6 = 10
Sporlan 0.5/20, Alco Ex7 = 10
Sporlan 30, Alco Ex8, Danfoss
ETS = 25
Sporlan 50/250 = 45
70
Air conditioner
NB consider double CH
Proportinal Gain in case
of Inverter or Stepless
Compressor
70 6
CAREL E2V = 3
Alco Ex5/6 = 6
Sporlan 0.5/20, Alco Ex7 = 8
Sporlan 30, Alco Ex8, Danfoss
ETS = 18
Sporlan 50/250 = 35
35
Display cabinet plug-in
50 12
CAREL E2V = 5
Alco Ex5/6 = 8
Sporlan 0.5/20, Alco Ex7 = 10
Sporlan 30, Alco Ex8, Danfoss
ETS = 25
Sporlan 50/250 = 45
60
Display cabinet centralized
50 12
CAREL E2V = 7
Alco Ex5/6 = 10
Sporlan 0.5/20, Alco Ex7 = 10
Sporlan 30, Alco Ex8, Danfoss
ETS = 25
Sporlan 50/250 = 45
100
* Consult the electronic expansion valve technical documentation to check the complete valve-driver system compatibility with the chosen refrigerant
The following values are recommended as a reference and starting point for the confi guration of the
EVD400 and the PID control.
The users can then check whether or not these values are correct based on their own acceptability
criteria, and then change them if necessary.
N.B.: the pressure probe is connected to S1.
Primary
Secondary:
Ch low Superheat: Recommended value 2°C with superheat set point greater than 4°C.
If the superheat set point is lower, the low superheat threshold must also be reduced, guaranteeing a
difference of at least 2 °C between the two.
Low SH int. time: Recommended value 1.0 seconds with a threshold of 2°C. If the threshold is lower,
the time must also be reduced to 0.5 seconds. N.B.: A value of 0 (zero) seconds completely disables the
protection.
LOP cool mode: Recommended value from 5 °C to 10 °C below the typical minimum saturated evaporation temperature of the installation. Example: for chillers with a rated evaporation temperature of 3 °C
and a minimum tolerated evaporation temperature of -1 °C, set the LOP Limit to -6 °C
LOP integral time: Recommended value 2 seconds, to be increased to approx. 10 seconds if the action
is too intense (excessive opening of the valve as a response to low pressure) and reduced to 1 second
if the action is insuffi cient (excessively low evaporation temperature). N.B.: A value of 0 (zero) seconds
completely disables the protection.
MOP startup delay: Recommended value 60 seconds, however the changeability of the starting dynamics of different units means the time needs to be optimised: in the set time the evaporation pressure
must fall below the value set for “MOP cool mode” to effectively activate the MOP.
MOP cool mode: The value set depends on the refrigerating unit and its design, and is indeed a design
value of the unit: no recommendations can be made.
MOP integral time: Recommended value 2 seconds, to be increased to approx. 10 seconds if the action
is too intense (excessive closing of the valve as a response to high pressure) and reduced to 1 second if
the action is insuffi cient (excessively high evaporation temperature).
N.B.: A value of 0 (zero) seconds completely disables the protection.
41
PID
d
u
y°
y
+
+
P(s)
n
w
+
+
Fig. 1
PID
d
+
+
P(s)
n
+
+
A
B D
E
C
Fig. 2
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
APPENDIX IV. SUMMARY OF PID CONTROL
IV.I Symbols used
In this introduction to PID control, reference is made to the following block diagram, which is a simplifi ed representation of an cycle control individual:
With the following symbols:
symbol meaning
y°(t) Reference signal or set point
w(t) Controlled or process variable
y(t) Value of the controlled or process variable
e(t) Error, defi ned as e(t)=y°(t)-y(t)
u(t) Control variable
d(t) Load disturbance
n(t) Measurement noise
PID PID control
P(s) Transfer function describing the process being controlled
If the PID control manages the superheat value by positioning the electronic expansion valve, which we
have called the SH PID, then:
IV.II Pid control law
PID control in its simplest form is defi ned by the following law
u(t)= Kpe(t) + Ki∫e(t)dt + Kd
de(t)
dt T
i
oppure
u(t)= K e(t) + 1 ∫e(t)dt + Td
de(t)
dt
This means that the control is calculated as the sum of three contributions:
P or proportional action
Ke(t)
(k = proportional gain)
I or integral action
T
i
K
∫e(t)d
t
(Ti = integral time)
D or derivative action
T
i
K
∫e(t)d
t
(Td = derivative time)
hence the defi nition ‘PID control’.
IV.III Proportional action
EFFECT OF K
Increasing the value of the proportional gain, increases the reactivity of the valve, to the limit
where this may cause instability and not reach the set point with precision. This depends on the
ratio between the circuit capacity and the valve capacity, and on the maximum number of valve
control steps.
The proportional action guarantees control over the process variable that is proportional to the system
error at the instant t. The controller performs a corrective action on the control variable, at the instant t,
that is equal to u(t)=K*e(t)= K*(y(t)-y0(t)).
The proportional action follows the logic whereby the greater the error, instant by instant, the more
Key
A y° (t)= SH set piont
B u (t)= valve position
C lamination process
D w (t)= real SH
E y (t)= measured SH
42
Controller
Output
100%
error
proportional band
full-scale error
Controller
Output
100%
error
proportional band
full-scale error
Fig. 3
step
e (t)
band prop.= 100
step max
Fig. 4
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
intense the action on the process so as to bring the controlled variable to the desired value.
It is important to note that this has a value other than zero only if the error is not zero: therefore, in
steady operation this is ideally zero. In reality, in steady operation (stable at the set point) it still follows
the fl uctuations in the controlled variable due, for example, to measurement noise, and it can be shown
that alone it may not reach the set point, maintaining a certain deviation from the latter.
The proportional action makes its contribution in the initial transient periods; then, when the error
decreases, it loses effectiveness.
To determine the proportional gain K, consider the relationship between the input and output of a
controller to be purely proportional, as shown in the fi gure, for two values different of the gain, where
the input and the output are represented as percentages of their fi eld of variation:
Defi ning the variation in the input (as a percentage of its fi eld of variation) as the proportional band BP
that causes a 100% variation in the output, if the input and output signals have the same physical type
and vary within the same fi eld of values (for example 4 to 20 mA), the gain K is:
Kp=
100
BP%
In the fi rst diagram in Fig. 3, Bp=50%, hence Kp=2, while in the second BP=10% and thus Kp=10. The
proportional action of the PID controllers is set by the operator as the proportional band changes.
EXAMPLE: Consider the case of a controller with a 4 to 20 mA input and 0 to 10 V output: when
BP=10%, a 1.6 mA variation in the input produces a variation from 0 to 10 V at the output, that is, the
total gain is 10/1.6=6.25 V/mA.
In the case of the SH PID:
valve pos. (SH set point – SH measured(t))
K= ± 20%
step max reg Q circuit
•
100
Q valve
where:
step max reg = maximum electronic expansion valve control steps
Q circuit = capacity in kW of the refrigerant circuit in steady operation
Q valve = capacity in kW of the electronic expansion valve in the same operating conditions as Q
circuit
IV.IV Integral action
EFFECT OF Ti
Increasing the value of the integral time Ti, the valve reaches the set point more slowly but
avoids excessive swings. This depends on the type of evaporator and the inertia of the circuit.
The integral action is used to guarantee that the error is null in steady state. Indeed, the integral action
is not zero if there is no error; quite the opposite, if for example the error remains stable, it continues to
increase linearly, following the principle whereby “until the controlled variable decides to move in the
direction I want, I will continue to apply an increasingly intense action”. Consequently, the integral action
not only considers the current value, at the instant of the error, but also the past values.
As a result, if steady state is reached, that is, the error is null, the only contribution to control will be the
43
%
Output
% +10
Error 0
-10
Time
}
}
A
B
C
Fig. 5
A
B
de(t)
= e(t+T
d
)-e(t)
= T
d
dt
e(t)
T
d
T
d
t
Fig. 6
ENGLISH
EVD4 +030220227 - rel. 2.1 - 12.06.2008
integral action. It is almost always the integral action that dominates the way in which the system reaches
steady operation.
The integral action by defi nition does not make “jumps” and therefore is the slowest to react. Indeed, it
has almost no effect during the initial transient periods: these periods are dominated by the other two
actions. To defi ne the integral time, the PI action is considered:
u(t)= Kpe(t) + K
i
∫
e(t)d
t
and the response of the two terms to the step change (i.e. +10%), as shown in the fi gure:
Integral time (reset time, integral constant or doubling time) is defi ned as the time required for the
response of the I part to be equal to that of the P part. That is, the total response to the step change is
double the value of the proportional part alone.
In the case of the SH PID, the integral time depends on the type of evaporator (plate, tube bundle, ...)
and the thermal inertia of the circuit; the more ‘reactive’ the system, the lower the contribution of the
integral action must be.
IV.V Derivative action
EFFECT OF Td
Increasing the value of the derivative time Tp decreases swings, however there may be
fl uctuations around the set point.
The derivative action makes the control depend on the “future” of the error, that is, on the direction it is
moving in and the speed it varies. In fact, the derivative action calculates an estimate for the error after t
seconds based on the trend of the curve at the instant t (see the following fi gure) and therefore ensures
that control will depend on a prediction of the error Td at a future instant of time.
The derivative action “tries to understand where the error is going and how fast it is moving” and reacts
as a consequence; the parameter Td determines how far into the future the prediction is made.
The derivative action is the fastest to react (including to measurement noise, unfortunately) and is only
helpful if the prediction is good, that is, if Td is not too high compared to the temporal changes in the
error: the difference can be seen by examining cases A and B in the fi gure.
The derivative action is ideally null in steady state, however in reality it follows and tends to amplify
the measurement noise; therefore, it is only useful in the initial transient periods. It may be very useful,
however it is also dangerous, above all if the measurement of the controlled variable is noisy.
Key
A integral action
B proportional action
C Ti integral action time
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CAREL S.p.A.
Via dell’Industria, 11 - 35020 Brugine - Padova (Italy)
Tel. (+39) 049.9716611 - Fax (+39) 049.9716600
e-mail: carel@carel.com - www.carel.com
Agenzia / Agency:
+030220227 rel. 2.1 - 12.06.2008
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