Parker PSD04 User manual

Parker RAC Europe PSD04 | User manual ver. 3.6 | Code 144PSDI364
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PSD04
Electronic expansion valves drivers
ENGLISH
USER MANUAL ver. 3.6
CODE 144PSDE364

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Important
Important
Read this document carefully before installing and using the device and follow all the additional information; keep this
document close to the device for future consultations.
The following symbols support the reading of the document:
it indicates a suggestion
it indicates an additional information.
The device must be disposed according to the local legislation about the collection for electrical and electronic
equipment.

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Index
1INTRODUCTION .................................................................................................................................. 5
1.1 Introduction........................................................................................................................................ 5
1.2 Summarising table of the main features and available models................................................................... 6
2DESCRIPTION ..................................................................................................................................... 8
2.1 Description ......................................................................................................................................... 8
3SIZE AND INSTALLATION ..................................................................................................................... 9
3.1 Size ................................................................................................................................................... 9
3.2 Installation ....................................................................................................................................... 10
3.3 Additional information for the installation ............................................................................................. 10
4ELECTRICAL CONNECTION ................................................................................................................. 11
4.1 Meaning of the connectors.................................................................................................................. 11
4.2 Example of electrical connection.......................................................................................................... 15
4.3 Additional information for electrical connection...................................................................................... 16
5USER INTERFACE .............................................................................................................................. 17
5.1 Preliminary information ...................................................................................................................... 17
5.2 Keyboard (not available in the blind versions) ....................................................................................... 17
5.3 Signalling LEDs ................................................................................................................................. 17
6OPERATION ...................................................................................................................................... 19
6.1 Switch on and resynchronization ......................................................................................................... 19
6.2 Operating mode ................................................................................................................................ 21
6.2.1 Preliminary information .............................................................................................................. 21
6.3 Stand-by and operation mode selection................................................................................................ 21
6.4 Enabling PSD04................................................................................................................................. 22
6.5 Analog positioner control .................................................................................................................... 22
6.6 Algorithm start-up ............................................................................................................................. 23
6.7 Manual mode .................................................................................................................................... 23
6.8 Debugging mode ............................................................................................................................... 24
6.9 Superheat control algorithm ............................................................................................................... 24
7CONFIGURATION............................................................................................................................... 26
7.1 Unit of measurements........................................................................................................................ 26
7.2 Configuring a built-in display version ................................................................................................... 26
7.3 Configuring a blind version ................................................................................................................. 31
7.4 Configuring the device through the programming key PSKEY10............................................................... 32
7.5 Connecting the device through the set-up software system Parameters Manager....................................... 33
7.6 Main menu ....................................................................................................................................... 33
7.7 Backup and restore............................................................................................................................ 34
7.8 List of configuration parameters .......................................................................................................... 35
8SERIAL COMMUNICATION .................................................................................................................. 53
8.1 Preliminary information ...................................................................................................................... 53
8.2 CANBUS serial communication ............................................................................................................ 53
8.3 MODBUS serial communication............................................................................................................ 55
9ALARMS AND ERRORS........................................................................................................................ 56
9.1 Alarms and errors.............................................................................................................................. 56
9.2 Memory error.................................................................................................................................... 56
9.3 Configuration error ............................................................................................................................ 56
9.4 Communication error ......................................................................................................................... 57
9.5 Probe error ....................................................................................................................................... 58

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9.6 Power failure and backup battery error ................................................................................................ 58
9.7 Algorithm status................................................................................................................................ 59
9.8 Algorithm protection functions ............................................................................................................ 59
9.8.1 LoSH........................................................................................................................................ 59
9.8.2 HiSH ........................................................................................................................................ 59
9.8.3 LOP.......................................................................................................................................... 59
9.8.4 MOP ......................................................................................................................................... 60
9.8.5 LowPressure.............................................................................................................................. 60
9.9 Parameters error ............................................................................................................................... 60
10 ACCESSORIES .................................................................................................................................. 61
10.1 Programming key PSKEY10............................................................................................................. 61
10.1.1 Introduction .............................................................................................................................. 61
10.1.2 Description ............................................................................................................................... 61
10.1.3 Size ......................................................................................................................................... 61
10.1.4 Connection to the device ............................................................................................................ 61
10.2 Programming kit PSIF20TUXI .......................................................................................................... 62
10.2.1 Introduction .............................................................................................................................. 62
10.2.2 Description ............................................................................................................................... 62
10.2.3 Size ......................................................................................................................................... 63
10.2.4 Connection to the Personal Computer........................................................................................... 63
10.3 Non optoisolated RS-485/USB serial interface PSIF20SUXI ................................................................. 63
10.3.1 Introduction .............................................................................................................................. 63
10.3.2 Description ............................................................................................................................... 64
10.3.3 Size ......................................................................................................................................... 65
10.3.4 Connection to the Personal Computer........................................................................................... 65
10.4 Backup module PSS4B ................................................................................................................... 66
10.4.1 Introduction .............................................................................................................................. 66
10.4.2 Description ............................................................................................................................... 66
10.4.3 Size ......................................................................................................................................... 67
10.4.4 Connection to the device ............................................................................................................ 67
11 TECHNICAL DATA .............................................................................................................................. 68
11.1 Technical data............................................................................................................................... 68

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1INTRODUCTION
1.1 Introduction
The drivers of the PSD04 series are devices studied for the management of bipolar stepper electronic expansion valves.
They are available with built-in keyboard display and blind version (according to the model).
The user interface of the built-in keyboard display versions consists of a LCD graphic display, of six buttons and
guarantees an index of protection IP40.
The blind versions must be used with a remote user interface.
They can be powered both in alternating and in direct current (24 VAC/24... 37 VDC).
The drivers can work with the most common temperature probes (NTC and Pt 1000) and with the most common
pressure transducers (0-20 mA, 4-20 mA, 0-5 V ratiometric and 0-10 V).
They have configurable digital inputs (enable the operation, change parameters set, backup module status, etc.) and a
5 res. A @ 250 VAC digital output (electromechanical relay) configurable as alarm output, solenoid valve or
resynchronisation valve.
Through the programming port it is possible to make the upload and the download of the configuration parameters
(using the programming key PSKEY10); through this port (or the RS-485 one), it is also possible to connect the
devices to the set-up software system Parameters Manager (through a serial interface).
Through the CAN communication port (or the RS-485 one) it is possible to connect the devices to a controller or to a
remote user interface instead.
Through the backup module PSS4B it is finally possible to close the valve in case of lack of power supply of the drivers.
Installation is on DIN rail.
Among the many selectable functions one highlights the possibility to work both in stand alone mode and under the
supervision of a controller, the management of Sporlan range of EEV valves and the backup probes.

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1.2 Summarising table of the main features and available
models
The following table shows the main features of the devices and the available models.
The character “ / “ means the feature can be set through a configuration parameter.
Version (according to the model)
built-in LCD display •
blind (no display) • • •
User interface
71.0 x 128.0 mm (2.795 x 5.039 in;
L x H), 4 DIN modules • • • •
128 x 64 pixel single colour (black with back
lighting through white LEDs) LCD graphic
display
•
number of buttons 6
index of protection IP20
IP40 the front
IP20
IP40 the front
IP20
IP40 the front
IP20
IP40 the front
Main connections
extractable screw terminal blocks • • • •
Power supply
24 VAC or 24... 37 VDC • • • •
Analog inputs
analog input 1 (suction temperature backup
probe / suction pressure backup probe)
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
analog input 2 (suction temperature backup
probe / suction pressure backup probe)
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
NTC / Pt 1000
/ 0-20 mA /
4-20 mA /
0-5 V
analog input 3 (suction temperature probe) NTC / Pt 1000 NTC / Pt 1000 NTC / Pt 1000 NTC / Pt 1000

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analog input 4 (suction pressure probe)
0-20 mA /
4-20 mA /
0-5 V / 0-10 V
0-20 mA /
4-20 mA /
0-5 V / 0-10 V
0-20 mA /
4-20 mA /
0-5 V / 0-10 V
0-20 mA /
4-20 mA /
0-5 V / 0-10 V
Voltage free digital inputs
digital input 1 (enable the operation / change
parameters set / resynchronisation command
/ backup module status)
• • • •
digital input 2 (enable the operation / change
parameters set / resynchronisation command
/ backup module status)
• • • •
High voltage digital inputs
on-off switching (enable the operation /
change parameters set / resynchronisation
command / backup module status)
• • •
Digital outputs (electromechanical relays; res. A @ 250 VAC)
digital output 1 (alarm output / solenoid valve
/ resynchronisation valve) 5 A 5 A 5 A 5 A
Communication ports
CAN port with CANBUS communication
protocol • •
RS-485 port with MODBUS communication
protocol • • •
programming port with MODBUS
communication protocol • • • •
Codes
codes PSD4BX3 PSD4BM3 PSD4BF3 PSD4DF3
For further information look at chapter 11 “TECHNICAL DATA”; for further models please contact the Parker RAC
Europe sales network.

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2DESCRIPTION
2.1 Description
The following drawing shows the aspect of PSD04.
The following table shows the meaning of the parts of PSD04.
Part Meaning
1 digital output
2 analog inputs and free of voltage digital inputs
3 CAN port (not available in models PSD4BX3 and PSD4BM3)
4 CAN port line termination (not available in models PSD4BX3 and PSD4BM3)
5 display and keyboard (not available in models PSD4BX3, PSD4BM3 and PSD4BF3)
6 reserved
7 bipolar stepper motor output
8 programming port
9 power supply
10 RS-485 port (not available in model PSD4BX3)
11 RS-485 port line termination (not available in model PSD4BX3)
12 signalling LEDs
13 high voltage digital input (not available in model PSD4BX3)
For further information look at the following chapters.

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3SIZE AND INSTALLATION
3.1 Size
The following drawing shows the size of PSD04 (4 DIN modules); size in mm (in).

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3.2 Installation
On DIN rail 35.0 x 7.5 mm (1.377 x 0.295 in) or 35.0 x 15.0 mm (1.377 x 0.590 in).
To install the device operate as shown in the following drawing.
1 2
To remove the device remove possible extractable screw terminal blocks plugged at the bottom first, then operate on
the DIN rail clips with a screwdriver as shown in the following drawing.
3 4
To install the device again press the DIN rail clips to the end first.
3.3 Additional information for the installation
- make sure the working conditions of the device (operating temperature, operating humidity, etc.) are in the
limits indicated; look at chapter 11 “TECHNICAL DATA”
- do not install the device close to heating sources (heaters, hot air ducts, etc.), devices having big magnetos
(loud speakers, etc.), locations subject to direct sunlight, rain, humidity, dust and mechanical vibration
- according to the local safety legislation, protection against possible contacts with other electrical parts must be
ensured by the correct installation of the device; all the parts which ensure protection of the device must be
fixed so that you cannot be removed without using a special tool.

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4ELECTRICAL CONNECTION
4.1 Meaning of the connectors
The following drawing shows the connectors of PSD04.
The following tables show the meaning of the connectors; for further information look at chapter 11 “TECHNICAL
DATA”.
Digital output
Electromechanical relay.
Terminal Meaning
CO1 common digital output
NO1 normally open contact digital output
Analog inputs and free of voltage digital inputs
Part Meaning
+12V power supply 0-20 mA/4-20 mA/0-10 V transducers (12 VDC ±10%, 60 mA max.)
+5V power supply 0-5 V ratiometric transducers (5 VDC ±5%, 40 mA max.)
GND ground analog inputs and free of voltage digital inputs
DI1 digital input 1 (non optoisolated free of voltage contact; 5 V when not loaded, 3.3 mA when loaded)
DI2 digital input 2 (non optoisolated free of voltage contact; 5 V when not loaded, 3.3 mA when loaded)

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GND common analog inputs and free of voltage digital inputs
AI1 analog input 1 (which can be set via configuration parameter for NTC/Pt 1000 probes and for
0-20 mA/4-20 mA/0-5 V ratiometric transducers)
AI2 analog input 2 (which can be set via configuration parameter for NTC/Pt 1000 probes and for
0-20 mA/4-20 mA/0-5 V ratiometric transducers)
GND common analog inputs and free of voltage digital inputs
AI3 analog input 3 (which can be set via configuration parameter for NTC/Pt 1000 probes)
AI4 analog input 4 (which can be set via configuration parameter for 0-20 mA/4-20 mA/0-5 V
ratiometric/0-10 V transducers)
CAN port (not available in models PSD4BX3 and PSD4BM3)
Non optoisolated CAN port, with CANBUS communication protocol.
Terminal Meaning
CAN+ signal +
CAN- signal -
GND ground
- the maximum number of devices that can make a CAN network (32) depends on the bus load; the bus
load depends on the baud rate of the CANBUS communication and on the kind of device in the network
(for example: a CAN network can be made of a programmable controller, of four I / O expansions and of
four user interfaces with baud rate 500,000 baud)
- connect the CAN port using a twisted pair
- do not connect more than four I / O expansions.
For the settings about the CAN port look at chapter 7 “CONFIGURATION”.
Terminal Meaning
GND ground
VDC power supply remote user interface (22... 35 VDC, 100 mA max.)

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CAN port line termination (not available in models PSD4BX3 and PSD4BM3)
Position microswitch 1 on position on (120 Ω, 0.25 W) to plug in the CAN port line termination (plug in the termination
of the first and of the last element of the network).
Reserved
Reserved.
Bipolar stepper motor output
Terminal Meaning
V BATT backup power supply input
SHIELD common bipolar stepper motor shielded cable
SO 1A bipolar stepper motor coil 1
SO 1B bipolar stepper motor coil 1
SO 2A bipolar stepper motor coil 2
SO 2B bipolar stepper motor coil 2
With reference to the previous table, the following one shows how to connect to PSD04 the Sporlan range of EEV
valves.
Terminal
Wire (color)
Sporlan SER, SERI and SEHI
SO 1A green wire
SO 1B red wire
SO 2A black wire
SO 2B white wire
When a PSD04 superheat controller is used with a Sporlan Unipolar Valve, the customer must use a
Bipolar cable, and when they do this, the inputs connections from the valve to the controller are the same.
Programming port
Non optoisolated programming port, with MODBUS communication protocol.

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Power supply
Terminal Meaning
V≅+ power supply device (not isolated; 24 VAC +10% -15%, 50/60 Hz ±3 Hz, 40 VA max. or
24... 37 VDC, 22 W max.)
V≅- power supply device (not isolated; 24 VAC +10% -15%, 50/60 Hz ±3 Hz, 40 VA max. or
24... 37 VDC, 22 W max.)
- protect the power supply with a fuse rated 2 A-T 250 V
- if the device is powered in direct current, it is necessary to respect the polarity of the power supply
voltage.
RS-485 port (not available in model PSD4BX3)
Non optoisolated RS-485 port, with MODBUS communication protocol.
Terminal Meaning
GND ground
RS485+ D1 = A = + (terminal 1 of the transceiver)
RS485- D0 = B = - (terminal 0 of the transceiver)
- connect the RS-485 MODBUS port using a twisted pair.
For the settings about the RS-485 MODBUS port look at chapter 7 “CONFIGURATION”.
RS-485 port line termination (not available in model PSD4BX3)
Position microswitch 1 on position on (120 W, 0.25 W) to plug in the RS-485 port line termination (plug in the
termination of the first and of the last element of the network).
High voltage digital input
High voltage digital input (if present).
Part Meaning
DIHV1 high voltage digital input (optoisolated contact; 115 VAC -10%... 230 VAC +10%)
DIHV1 high voltage digital input (optoisolated contact; 115 VAC -10%... 230 VAC +10%)

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4.2 Example of electrical connection
The following drawing shows an example of electrical connection of PSD04.
Please note the power supply of PSD04 and that of PSS4B are not isolated one from the another: it is
important to wire the devices correctly as indicated in the drawing.

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4.3 Additional information for electrical connection
- do not operate on the terminal blocks of the device using electrical or pneumatic screwers
- if the device has been moved from a cold location to a warm one, the humidity could condense on the inside;
wait about an hour before supplying it
- make sure the power supply voltage, the electrical frequency and the electrical power of the device correspond
to those of the local power supply; look at chapter 11 “TECHNICAL DATA”
- disconnect the power supply of the device before servicing it
- do not use the device as safety device
- for the repairs and for information about the device please contact the Parker RAC Europe sales network.

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5USER INTERFACE
5.1 Preliminary information
PSD04 is available with built-in LCD display keyboard and blind version (according to the model).
The built-in versions can be programmed through the keyboard interface, blind ones can be programmed by using a
remote user interface (for example PSV4GBR if the version has a CANBus card fitted): both versions with display or
without display can be programmed through the set-up software system Parameters Manager.
Using the programming key PSKEY10 it is also possible to upload and download the configuration parameters.
5.2 Keyboard (not available in the blind versions)
The following table shows the meaning of the keyboard.
Button Preset function
cancel, hereinafter also called “button ESC”
move to left, hereinafter also called “button LEFT”
increase, hereinafter also called “button UP”
decrease, hereinafter also called “button DOWN”
move to right, hereinafter also called “button RIGHT”
confirmation, hereinafter also called “button ENTER”
5.3 Signalling LEDs
The following table shows the meaning of the LEDs at the front of the device.
LED Meaning
ON
LED power supply
if it is lit, the device will be powered
if it is out, the device will not be powered
STEP 1
LED stepper output 1
if it is lit, the valve will be stopped and completely closed
if it flashes slowly, the valve will be stopped and completely open
if it flashes quickly, the valve will be moving
if it is out, the valve will be stopped and open in an intermediary position

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STEP 2
LED auxiliary
if parameter Ph80 = 0, LED status
if it is lit, the device will be working in superheating algorithm modality
if it flashes slowly, the device will be working in manual or in debugger modality
if it flashes quickly, the device will be working in analog positioner modality
if it is Off, the device will be in a different status
if parameter Ph80 = 1, LED MOP/LOP alarm
if it flashes quickly, the MOP alarm will be running
if it flashes slowly, the LOP alarm will be running
if it is out, no MOP/LOP alarm will be running
if parameter Ph80 = 2, LED high superheating/low superheating alarm
if it flashes quickly, the high superheating alarm will be running
if it flashes slowly, the low superheating alarm will be running
if it is out, no high superheating/low superheating alarm will be running
LED alarm
if it is On, an alarm will be running
if it flashes slowly, it is necessary to disable the device so that the modification of the configuration
parameters has effect
if it flashes quickly, it is necessary to switch off/on the power supply of the device so that the
modification of the configuration parameters has effect
if it is Off, no alarm will be running
COM
LED communication
if it is on, a device-controller communication alarm will be running and the valve is halted
if it flashes slowly, the device-controller communication will not be completely correct
if it flashes quickly, a device-controller communication alarm will be running and the device will be
working in stand alone modality
if it is off, the device will be working in stand alone modality or no device-controller communication
alarm will be running

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6OPERATION
6.1 Switch on and resynchronization
At switch-on and after a resynchronization, the fundamental parameters for moving the motor are acquired.
The parameters of pressure and temperature units of measure are loaded at switch-on, and, if necessary, is performed
the conversion of all the parameters of pressure and temperature.
The parameters that are loaded only during the initialisation phase, and therefore require a reset to be loaded, are
referred to as manufacturer parameters (Manufacturer menu) and can be modified only in the stand-by state.
To select the desired valve, it is necessary to set the correct value in Valve selection (parameter Pi07).
All relevant parameters specific to that valve are loaded automatically from the flash memory, according to the table
below:
Pi07
Valve name
Minimum regulation
steps [step]
Maximum
regulation
steps [step]
Overdriving
steps [step]
Stepping
rate [step/s]
Operating phase
current [mA]
Holding phase
current [mA]
Recommended Step
Mode
CABLAGGIO
SO1A
SO1B
SO2A
SO2B
0* Generic valve Pr50 Pr51 Pr52 Pr53 Pr54 Pr55
1 Sporlan SER AA 0 2500 3500 400 120 0 FullStep green red black white
2 Sporlan SER A 0 2500 3500 400 120 0 FullStep green red black white
3 Sporlan SER B 0 2500 3500 400 120 0 FullStep green red black white
4 Sporlan SER C 0 2500 3500 400 120 0 FullStep green red black white
5 Sporlan SER D 0 2500 3500 400 120 0 FullStep green red black white
6 Sporlan SERI F 0 2500 3500 400 120 0 FullStep green red black white
7 Sporlan SERI G 0 2500 3500 400 120 0 FullStep green red black white
8 Sporlan SERI J 0 2500 3500 400 120 0 FullStep green red black white
9 Sporlan SERI K 0 2500 3500 400 120 0 FullStep green red black white
10 Sporlan SERI L 0 2500 3500 400 120 0 FullStep green red black white
11 Sporlan SEHI 175 0 6386 6500 400 160 0 FullStep green red black white
12 Sporlan SEHI 400 0 6386 6500 400 160 0 FullStep green red black white
13 Sporlan ESX 24 224 300 40 460 0
FullStep green red black white
14 Sporlan EDEV B/C (U) 0 800 1250 200 120 0 FullStep ?? ?? ?? ??
15 Sporlan reserved -- -- -- -- -- -- -- -- -- -- --
16 Sporlan reserved -- -- -- -- -- -- -- -- -- -- --
17* Sporlan SER 1.5 to 20 0 1596 3500 400 160 0 FullStep green red black white
18* Sporlan SEI 30 0 3193 6500 400 160 0 FullStep green red black white
19* Sporlan SEI 50 0 6386 7500 400 160 0 FullStep green red black white
20* Sporlan SEH 100 0 6386 7500 400 160 0 FullStep green red black white
21* Sporlan SEI 0.5 to 11 0 1596 3500 400 160 0 FullStep green red black white
22* Alco EXM/EXL-246 16 250 350 45 130 0 HalfStep blue yellow white orange
23* Alco EX4 TO 6 0 750 1000 500 500 100 FullStep blue brown white black
24* Alco EX7 0 1600 2000 500 750 250
FullStep blue brown white black
25* Alco EX8 0 2600 3250 500 800 500
FullStep blue brown white black
26* Danfoss ETS 12.5-25-50 0 2625 3150 300 100 75 FullStep green red white black
27* Danfoss ETS 100 -250 0 3530 4250 300 100 75 FullStep green red white black
28* Danfoss ETS 400 0 3810 4550 300 100 75 FullStep green red white black
39***
* Sprlan CO2 valve 0 2500
2750
/
3125
400 275 0
FullStep
green red white black

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The Driver type (parameter DrTy) used depends on the hardware, while the Stepper type (parameter StTy) depends
on the motor to be controlled; currently, the PSD04 can only be used with Parker Sporlan bipolar stepper motors.
The driving mode can be selected through parameter Driving mode selection (Pi01).
The Valve duty cycle (parameter Pr45) represent the limit of continuous operating of the valve: limiting the continuous
activity of the valve reduces the heating of same.
For example: setting Pr45 = 70% means for every 70 ms in which operational current is used, there will be 30 ms in
which maintenance current will be applied on the valve.
If the parameter is set to 100%, this algorithm is deactivated.
Furthermore, this procedure applies only to the normal operation of the valve: all forced movements (for example
synchronisation closure, positioning caused by probe errors or communication errors) are continuous until the target
position is reached.
The valve is automatically resynchronized at every switch on.
During the resynchronization the valve is completely closed; the resynchronization is necessary to realign the physical
position of the complete closure with the 0 step position.
In debug mode the speed follows the debug step rate; in manual mode the speed follows the maximum speed.
During normal operation of the valve, it assumes the 0% position corresponds to the physical position defined by
Minimum regulation steps, and that the 100% position corresponds to the physical position defined by Maximum
regulation steps.
A resynchronization request can be signalled using various methods:
- rising edge on digital input DI2 (if DI2 is configured as “resynchronization command” and Enabling mode
(parameter Pr06) is configured as “standalone”
- rising edge on Resynchro request (ResR) if Enabling mode (parameter Pr06) is configured as “network”
- internal request from the algorithm
- upon reaching the maximum limit of operational hours (Working hours, parameter Pr40), Resynchronization
interval (parameter Pr41), if configured.
A resynchronization request is performed only when it is safe to do, so when the state is Stand-by: this means that a
resynchronization request made when the valve is enabled is performed automatically only when it is disabled.
It is not currently possible to cancel a request.
The valve moves with a maximum velocity defined by the Stepping rate parameter.
The positioning speed depends on the operation mode:
- during resynchronization phase the maximum speed is applied, but at the end of the positioning the speed
follows a deceleration ramp
- in debug mode is used the speed of the Debug step rate (parameter Prd0)
- in manual mode and for all other positioning is used the maximum speed.
Using Limit valve opening (parameter Pr30) it is possible to adapt the valve to the application.
For example, for a valve with a maximum rating of 10 kW fitted to a machine with 7.5 kW, Pr30 would be set to 75%.
So, if the request position target is 90%, the final real position of the valve may be 67.5% = 90 x 75% of the
Maximum regulation steps.
The displayable variables for the current position and set-point in % are all referenced to the actual range of use of the
valve (0 - Pr30%), while the position in steps is the real position.