Dinel PDU-40-W Series User manual

User manual
METER
PDU-4x0-W
•Firmware: v.6.00 or higher
•Input type: 0/4-20 mA, 0/1-5V, 0/2-10V
•all mounting case IP 65
Read the user's manual carefully before starting to use the unit or software.
Producer reserves the right to implement changes without prior notice.
2013.11.0 PDU-4x0-W_INSHAEN_v.2.09.003

User manual - METER PDU-4x0-W
CONTENTS
1. BASIC REQUIREMENTS AND USER SAFETY........................................................................................3
2. GENERAL CHARACTERISTICS................................................................................................................4
3. TECHNICAL DATA......................................................................................................................................4
4. DEVICE INSTALLATION............................................................................................................................6
4.1. UNPACKING.......................................................................................................................................6
4.2. ASSEMBLY........................................................................................................................................6
4.3. CONNECTION METHOD...................................................................................................................7
4.4. MAINTENANCE................................................................................................................................16
5. FRONT PANEL DESCRIPTION................................................................................................................16
6. PRINCIPLE OF OPERATION...................................................................................................................17
6.1. MEASUREMENT MODE..................................................................................................................17
6.2. DETECTION OF THE PEAK VALUES............................................................................................18
6.3. CONTROL OF THE RELAY OUTPUTS..........................................................................................19
6.3.1. O e threshold mode................................................................................................................20
6.3.2. Two thresholds mode..............................................................................................................22
7. DEVICE PROGRAMMING.........................................................................................................................23
7.1. PROGRAMMING MENU..................................................................................................................23
7.2. PARAMETERS EDITION.................................................................................................................24
7.2.1. Numeric parameters (digit cha ge mode)...............................................................................24
7.2.2. Numeric parameters (slide cha ge mode)..............................................................................24
7.2.3. Switch parameters (“LIST” type).............................................................................................24
7.3. MENU DESCRIPTION.....................................................................................................................25
7.3.1. “rEL1” me u.............................................................................................................................25
7.3.2. “i Pt” me u..............................................................................................................................27
7.3.3. ”OutP” me u............................................................................................................................32
7.3.4. ”bri” parameter.........................................................................................................................34
7.3.5. ”HOLd” me u...........................................................................................................................34
7.3.6. ”SECu” me u...........................................................................................................................34
7.3.7. ”rS” me u.................................................................................................................................35
7.3.8. ”Edit” parameter......................................................................................................................36
7.3.9. ”dEFS” parameter....................................................................................................................36
7.3.10. ”SErv” me u..........................................................................................................................36
7.4. MENU STRUCTURE........................................................................................................................37
8. THE ALARM LED......................................................................................................................................3
. OVER-CURRENT PROTECTION.............................................................................................................3
10. DISPLAYED VALUES CALCULATION..................................................................................................3
10.1. ADDITIONAL CALCULATIONS (USED CONVERSION CHARACTERISTIC).............................39
10.1.1. Li ear characteristic..............................................................................................................40
10.1.2. Square characteristic............................................................................................................40
10.1.3. Square root characteristic.....................................................................................................41
10.1.4. User defi ed characteristic...................................................................................................41
10.1.5. Volume characteristics of a cyli drical ta k..........................................................................42
10.2. EXAMPLES OF CALCULATIONS.................................................................................................43
11. THE MODBUS PROTOCOL HANDLING...............................................................................................48
11.1. LIST OF REGISTERS....................................................................................................................48
11.2. TRANSMISSION ERRORS DESCRIPTION..................................................................................51
11.3. EXAMPLES OF QUERY/ANSWER FRAMES...............................................................................51
12. DEFAULT AND USER'S SETTINGS LIST.............................................................................................54
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User manual - METER PDU-4x0-W
Explanation of symbols used in the manual:
- This symbol de otes especially importa t guideli es co cer i g the i stallatio a d
operatio of the device. Not complyi g with the guideli es de oted by this symbol
may cause a accide t, damage or equipme t destructio .
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
- This symbol de otes especially importa t characteristics of the u it.
Read a y i formatio regardi g this symbol carefully
1. BASIC REQUIREMENTS AND USER SAFETY
- The manufacturer is not responsible for any damages caused by
inappropriate installation, not maintaining the proper environmental
conditions and using the unit contrary to its assignment.
- Installation should be conducted by qualified personnel . During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- If the device is equipped with PE connector, it should be connected to PE wire.
Otherwise PE wire should be connected to GND connector.
- The unit must be properly set-up, according to the application. Incorrect
configuration can cause defective operation, which can lead to unit damage or
an accident.
- If in the case of a unit malfunction there is a risk of a serious threat to the
safety of people or property additional, independent systems and
solutions to prevent such a threat must be used.
- The unit uses dangerous voltage that can cause a lethal accident. The unit
must be switched off and disconnected from the power supply prior to
starting installation of troubleshooting (in the case of malfunction).
- Neighbouring and connected equipment must meet the appropriate standards
and regulations concerning safety and be equipped with adequate overvoltage
and interference filters.
- Do not attempt to disassemble, repair or modify the unit yourself. The unit
has no user serviceable parts. Defective units must be disconnected and
submitted for repairs at an authorized service centre.
- Do not use the unit in areas threatened with excessive shocks, vibrations, dust,
humidity, corrosive gasses and oils.
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User manual - METER PDU-4x0-W
- Do not use the unit in areas where there is risk of explosions.
- Do not use the unit in areas with significant temperature variations, exposure to
condensation or ice.
- Do not use the unit in areas exposed to direct sunlight.
- Make sure that the ambient temperature (e.g. inside the control box) does not
exceed the recommended values. In such cases forced cooling of the unit must
be considered (e.g. by using a ventilator).
The unit is designed for operation in an industrial environment and must
not be used in a household environment or similar.
2. GENERAL CHARACTERISTICS
The DU-4x0-W meter is equipped with one current input 0-20 / 4-20mA and one voltage
input 0-5 / 1-5 / 0-10 / 2-10V. Current input has additionally overcurrent protection circuit,
which protects standard resistor. The selection of active input is realised by software, and
selected input can be changed at any time. Additionally the DU-4x0-W allows user to select a
conversion characteristic of several kinds: linear, square, square root, user defined (max.20
points length) and volume characteristics of a cylindrical tank in the vertical and horizontal
position. Result is showed on 4-digit LED display. Displayed values range can be selected by
user, from -999 to 9999, plus decimal point.
Depending on version the device can be equipped with: two relay outputs, two OC type
outputs, one relay and one passive isolated current output or one OC type and one passive
isolated current output. Device DU-4x0-W is equipped with RS-485 / Modbus RTU
communication interface and sensor supply output. The meter can be ordered in two power
supply versions.
The device has 4 buttons being used for main presets programming. To get high
protection level, the keyboard is mounted under transparent cover. To allow user to change
presets without opening the cover, an IR sensor is mounted. Remote controller keyboard is
equivalent to the device keyboard (Note, that remote controller is not a part of the DU-4x0-W
set – it is an additional equipment).
DU-4x0-W can be used for controlling and regulation of processes need proportional
and threshold control like: temperature processes (heating or cooling), valves controlling or
other.
3. TECHNICAL DATA
Power supply voltage
(depending on version)
85...230...2 0V AC/DC; 50 ÷ 0 Hz (separated)
or 19...24...50V DC and 1 ...24...35V AC (separated)
External fuse (required)
Power consumption
T - type, max. 2 A
max. 4.5 VA @ 85 ÷ 2 0V AC/DC
max. 4.5 VA @ 1 V ÷ 35V AC
max. 4.5 W @ 19V ÷ 50V DC
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User manual - METER PDU-4x0-W
Current input 0÷20 mA, 4÷20 mA overload protected,
maximum input current about 40 mA
Current measurement accuracy ± 0,1% @ 25°C; ± one digit (for 0÷20 mA range)
Current input resistance < 5 Ω (typical 55 Ω)
Voltage input 0÷5 V, 1÷5 V, 0÷10 V, 2÷10 V
Voltage measurement accuracy ± 0,1% @ 25°C; ± one digit (for 0÷10 V range)
Voltage input resistance > 50 kΩ
Temperature stability 50 ppm / °C
Display range -999 ÷ 9999, plus decimal point
Accepted prolonged input overload: 20%
Outputs
relay:
OC-type:
passive, isolated current:
sensor power supply UO:
0, 1 or 2 NO, 1A/250V AC (cos ϕ = 1)
0, 1 or 2; 30mA / 30VDC / 100mW
0 or 1;
range max. 2.8 ÷ 24mA
supply voltage: Us = 9.5 ÷ 3 V
load resistance 0...(Us – 9.5V) / 24mA [kΩ]
resolution: 12bits
isolation strength 5 0V DC
24V +5%, -10% / max. 100 mA, stabilized
Communication interface RS 485, 8N1 and 8N2, Modbus RTU, not separated
Baud rate 1200 bit/s ÷ 115200 bit/s
Display
(depending on version)
LED, 4 digit, 20mm height, red or
LED, 4 digit, 20mm height, green
Data memory non-volatile memory, EEPROM type
Protection level IP 5
Housing type
Housing material
Housing dimensions
without glands:
with glands:
wall mounted
ABS + fibreglass
110 x 80 x 7 mm
110 x 105 x 7 mm
Operating temperature 0°C do +50°C
or -20°C to +50°C
Storage temperature -10°C do +70°C
or -20°C to +70°C
Humidity
Altitude
5 to 90% no condensation
up to 2000 meters above sea level
Screws tightening max. torque 0,5 Nm
Max. connection leads cross section 3 mm2 (for connectors 1÷ ) or
2 mm2 (for connectors 7÷13, 15÷17)
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User manual - METER PDU-4x0-W
Safety requirements according to: PN-EN 1010-1
installation category: II
pollution degree: 2
voltage in relation to ground: 300V AC
insulation resistance: >20MΩ
insulation strength between power supply and
input/output terminal: 1min. @ 2300V
insulation strength between relays terminal:
1min. @ 1350V
EMC according to: PN-EN 132 -1
This is a class A unit. In a residential or a similar area it can cause radio
frequency interference. In such cases the user can be requested to use
appropriate preventive measures.
4. DEVICE INSTALLATION
The unit has been designed and manufactured in a way assuring a high level of user
safety and resistance to interference occurring in a typical industrial environment. In order to
take full advantage of these characteristics installation of the unit must be conducted correctly
and according to the local regulations.
- Read the basic safety requirements on page 3 prior to starting the installation.
- Ensure that the power supply network voltage corresponds to the nominal
voltage stated on the unit’s identification label.
- The load must correspond to the requirements listed in the technical data.
- All installation works must be conducted with a disconnected power supply.
- Protecting the power supply connections against unauthorized persons must be
taken into consideration.
4.1. UNPACKING
After removing the unit from the protective packaging, check for transportation damage. Any
transportation damage must be immediately reported to the carrier. Also, write down the unit
serial number located on the housing and report the damage to the manufacturer.
Attached with the unit please find:
- user’s manual,
- warranty,
4.2. ASSEMBLY
- Disconnect the power supply prior to starting assembly.
- Check the connections are wired correctly prior to switching the unit on.
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User manual - METER PDU-4x0-W
To install device on the wall, a pinholes should be made. Figure 4.1 presents
dimensions of the device and distances between holes. The back side of the device
has four mounting holes. This part of the case should be mounted to a wall by
screws.
Figure 4.1. Device a d assembly dime sio s
4.3. CONNECTION METHOD
Caution
- Installation should be conducted by qualified personnel . During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- The unit is not equipped with an internal fuse or power supply circuit breaker.
Because of this an external time-delay cut-out fuse with a small nominal current
value must be used (recommended bipolar, max. 2A) and a power supply circuit-
breaker located near the unit. In the case of using a monopolar fuse it must be
mounted on the phase cable (L).
- The power supply network cable diameter must be selected in such a way that in
the case of a short circuit of the cable from the side of the unit the cable shall be
protected against destruction with an electrical installation fuse.
- Wiring must meet appropriate standards and local regulations and laws.
- In order to secure against accidental short circuit the connection cables must be
terminated with appropriate insulated cable tips.
- Tighten the clamping screws. The recommended tightening torque is 0.5 Nm.
Loose screws can cause fire or defective operation. Over tightening can lead to
damaging the connections inside the units and breaking the thread.
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110 mm
80 mm
7 mm
90 mm
0 mm
ø8.4
ø4.4

User manual - METER PDU-4x0-W
- In the case of the unit being fitted with separable clamps they should be inserted
into appropriate connectors in the unit, even if they are not used for any
connections.
- Unused terminals (marked as n.c.) must not be used for connecting any
connecting cables (e.g. as bridges), because this can cause damage to the
equipment or electric shock.
- If the unit is equipped with housing, covers and sealing to, protecting against
water intrusion, pay special attention to their correct tightening or clamping. In the
case of any doubt consider using additional preventive measures (covers, roofing,
seals, etc.). Carelessly executed assembly can increase the risk of electric shock.
- After the installation is completed do not touch the unit’s connections when it is
switched on, because it carries the risk of electrical shock.
Due to possible significant interference in industrial installations appropriate measures
assuring correct operation of the unit must be applied. To avoid the unit of improper
indications keep recommendations listed below.
–Avoid running signal cables and transmission cables together with power supply cables
and cables controlling inductive loads (e.g. contactors). Such cables should cross at
a right angle.
–Contactor coils and inductive loads should be equipped with interference protection
systems, e.g. RC-type.
–Use of screened signal cables is recommended. Signal cable screens should be
connected to the earthing only at one of the ends of the screened cable.
–In the case of magnetically induced interference the use of twisted pair of signal cables is
recommended. Twisted pair (best if shielded) must be used with RS-485 serial
transmission connections.
–In the case of measurement or control signals are longer than 30m or go outside of the
building then additional safety circuits are required.
–In the case of interference from the power supply side the use of appropriate interference
filters is recommended. Bear in mind that the connection between the filter and the unit
should be as short as possible and the metal housing of the filter must be connected to
the earth with the largest possible surface. The cables connected to the filter output must
not be run with cables with interference (e.g. circuits controlling relays or contactors).
Connection of the power supply, and the measurement and controlling signals should be
made by clamping connectors mounted inside the housing.
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User manual - METER PDU-4x0-W
a) b)
Figure 4.2. Recomme ded dime sio s of cable strippi g
a) for big co ectors (1 to 6), b) for small co ectors (7 to 13, 15 to 17)
Figure 4.3. Method of co ecti g cables to the clamping co ectors
All connections must be made while power supply is disconnected !
Figure 4.4. Termi als descriptio (relay outputs)
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+ Uo -
n.c.
R1 R2
GND
0/1 - 5V
0/2 - 10V
0/4 - 20mA
+
+
GND
GND
DATA+
151617 12 11 10 9 8 71314 1
2
3
4
5
6
DATA-
RS - 485
(option) (option)
ower supply
(depending on version)
24V (+5%, -10%)
Imax = 100 mA
E
n.c.
5 mm
max. 1. mm
mm
max. 2 mm

User manual - METER PDU-4x0-W
Figure 4.5. Termi als descriptio (OC-type outputs)
Figure 4.6. Termi als descriptio (relay a d curre t output)
Figure 4.7. Termi als descriptio (OC-type a d curre t output)
10
+ Uo -
n.c.
R1
GND
0/1 - 5V
0/2 - 10V
0/4 - 20mA
+
+
GND
GND
DATA+
151617 12 11 10 9 8 71314 1
2
3
4
5
6
DATA-
RS - 485
(option)
24V (+5%, -10%)
Imax = 100 mA
E
n.c.
assive, isolated
current output
4÷20mA
(option)
ower supply
(depending on version)
+ Uo -
n.c.
GND
0/1 - 5V
0/2 - 10V
0/4 - 20mA
+
+
GND
GND
DATA+
151617 12 11 10 9 8 71314 1
2
3
4
5
6
DATA-
RS - 485
24V (+5%, -10%)
Imax = 100 mA
E
n.c.
OC1
- +
(option)
OC1: Umax = 30V DC,
Imax = 30mA, Pmax = 100mW
ower supply
(depending on version)
assive, isolated
current output
4÷20mA
(option)
+ Uo -
n.c.
GND
0/1 - 5V
0/2 - 10V
0/4 - 20mA
+
+
GND
GND
DATA+
151617 12 11 10 9 8 71314 123456
DATA-
RS - 485
24V (+5%, -10%)
Imax = 100 mA
E
n.c.
OC2
- +
(option)
OC1
- +
(option)
OC1, OC2: Umax = 30V DC,
Imax = 30mA, Pmax = 100mW
ower supply
(depending on version)

User manual - METER PDU-4x0-W
Figure 4.8. Co ectio of 2-wire curre t co verters
Figure 4.9. Co ectio of 3-wire curre t co verters
Figure 4.10. Co ectio of voltage co verters
11
13 12 11 10 9 8 7
24V DC
+ -
+
-
-
+
13 12 11 10 9 8 7
internally connected
+ -
13 12 11 10 9 8 7
24V DC
+ -
+
-
-
+
13 12 11 10 9 8 7
internally connected
+ -
13 12 11 10 9 8 7
24V DC
+ -
-
+
13 12 11 10 9 8 7
+
-
+
+
internally connected
+ -

User manual - METER PDU-4x0-W
Depe di g o versio :
85...230...2 0V AC/DC; 50 ÷ 0 Hz or
19...24...50V DC a d 16...24...35V AC
Figure 4.11. Co ectio of power supply a d relays
Contacts of relay outputs are not equipped with spark suppressors. While use
the relay outputs for switching of inductive loads (coils, contactors, power
relays, electromagnets, motors etc.) it is required to use additional
suppression circuit (typically capacitor 47nF/ min. 250VAC in series with
100R/5W resistor), connected in parallel to relay terminals or (better) directly
on the load. In consequence of using the suppression circuit, the level of
generated electromagnetic disturbances is lower, and the life of relay contacts
rises.
a) b)
Figure 4.12. Examples of suppressio circuit co ectio :
a) to relay termi als; b) to the i ductive load
12
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N
6 5 6 5
LL
N
!
FUSE
R1 R2
5 4 36
N L
FUSE
N L
12

User manual - METER PDU-4x0-W
Figure 4.13. Example of OC-type outputs co ectio
Figure 4.14. Example of curre t output co ectio usi g i ter al power supply
Figure 4.15. Example of curre t output co ectio usi g exter al power supply
13
Uo OC1
+ - - +
Logic controller
voltage input
24 V
- +
8 7 6 5
Uo OC1
+ - - +
8 7 6 5
R
2k2
LED 10 mA
4 3
current output
mA
- +
24V DC
+ -
4 3
Uo
8 7
current output
+ -
mA
- +
!Isolation loss

User manual - METER PDU-4x0-W
a) b)
Figure 4.16. Co ectio s of 2-wire se sor:
a) active, b) passive ( eeds additio al supply)
DU-4x0-W meter has no galvanic separation between measurement input and
RS-485 interface. If serial connection of multiple units is made or serial connection
with other device, without galvanic separation of RS-485 interface, is made then
RS-485 interface separators must to be used certainly (Figure 4.16, 4.18).
If RS-485 interfaces are isolated or not used then the separators are not necessary.
Figure 4.17. Serial co ectio of active 2-wire se sor with DU-4x0-W u it
a d other curre t measureme t device (e.g. PLC co troller).
14
12 11
+
-
Current source
0 - 20mA or
4 - 20mA
12 11 10 9 8 7
+
-
Connected internally
!
-
+
Current source
0 - 20mA or
4 - 20mA
12 11 10 9 8 7
Connected internally
G
galvanic
isolation
+
-
A
B
+
-RB

User manual - METER PDU-4x0-W
Figure 4.18. Serial co ectio of passive 2-wire se sor with DU-4x0-W u it
a d other curre t measureme t device (e.g. PLC co troller).
If device B (Figure 4.16 , 4.18) is equipped with galvanic separated input or if
different potentials between A and B devices signal grounds are allowed (e.g. if RS-
485 interface is separated or unused), current loop can be closed without separator
G.
Calculation of maximal allowable resistance of separator's input
Maximal resistance of the input (RG max.) and wires (RW max.) are calculated for circuit from
Figure 4.17. Used symbols are described below.
US min. - minimal sensor supply voltage (given in technical data of sensor),
Ug- voltage drop on galvanic separator input (constant for 4-20 mA range of
current),
Imax. = 20 mA - maximal current of current loop,
UO= 24V - sensor supply output voltage of device A,
RO= 30 Ω- sensor supply output resistance of device A,
RINP. = 50 Ω- measurement input resistance of device A,
RG max.RW max.=U−US min.−Ug
Imax
−RINP.−R
Let US min.=12V and Ug=5V then:
RG max.RW max.=24−12−3,5
0,02 −50−30=270
If current loop is closed without the separator G, then sum of measurement input resistance
(RB max.) of device B (Figure 4.17) and connections resistance (RW max.) should be not grater
than result of given below formula:
15
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-
+
12 11 10 9 8 7
Connected internally
G
galvanic
isolation
+
-
A
B
+
-RB

User manual - METER PDU-4x0-W
RB max.RW max.=U−US min.
Imax
−RINP.−R
For example if US min.=12V then:
RB max.RW max.=24−12
0,02 −50−30=520 
4.4. MAINTENANCE
The unit does not have any internal replaceable or adjustable components available to
the user. Pay attention to the ambient temperature in the room where the unit is operating.
Excessively high temperatures cause faster ageing of the internal components and shorten the
fault-free time of the unit's operation.
In cases where the unit gets dirty do not clean with solvents. For cleaning use warm water with
small amount of detergent or in the case of more significant contamination ethyl or isopropyl
alcohol.
Using any other agents can cause permanent damage to the housing.
Product marked with this symbol should not be placed in municipal waste. Please
check local regulations for disposal of electronic products.
5. FRONT PANEL DESCRIPTION
Symbols and functions of push-buttons:
Symbol used in the manual: [ESC/MENU]
Functions:
• Enter to main menu ( press and hold by at least 2 sec.)
• Exit the current level and Enter to previous menu (or measure mode)
• Cancel the changes made in parameter being edited
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MENU
ESC
MENU
ESC ENTER
AL R1 R2
i frared
receiver
alarm LED i dicator (AL)Thresholds exceedi g
LED i dicators (R)
display
programmi g pushbutto s

User manual - METER PDU-4x0-W
Symbol used in the manual: [ENTER]
Functions :
• Start to edit the parameter
• Enter to the sub-menu,
• Confirmation of changes made in parameter being edited
Symbol used in the manual: [^] [v]
Functions :
• Change of the present menu,
• Modification of the parameter value,
• Change of the display mode.
6. PRINCIPLE OF OPERATION
After turning the power supply on, device ID and software version are showed on the
display, next the controller goes to the measurement mode.
6.1. MEASUREMENT MODE
In the measure mode, the measurement results, converted over selected characteristic,
are displayed on the LED display. The measurement range equal to the nominal range is
called: nominal measurement range, and the measurement range equal to the extended
nominal range is called: permissible measurement range (Figure .1, .2).
Figure 6.1. Defi itio s of measureme t ra ges i mode 4 ÷ 20mA
If the result of measurement exceeds the permissible measurement range, warning ”-Hi-” or
”-Lo-” is displayed rather than input signal, depends on exceeded value (see description of
“Lo r” i “Hi r” parameters, paragraph ”inPt” menu).
Figure 6.2. Defi itio s of measureme t ra ges i mode 0 ÷ 20mA
17
ENTER
”Lo r” parameter ”Hi r” parameter
4 mA 20 mA
permissible measurement range
nominal measurement range
”Hi r” parameter
0 mA 20 mA
permissible measurement range
nominal measurement range

User manual - METER PDU-4x0-W
If the measurement value does not exceed permissible measurement range but
displayed value exceeds range -999 ÷ 9999, the warning ”-Ov-” is displayed rather
than the calculated result.
In the measurement mode user can check main thresholds values. After pressing [^] or
[v] button, name of the threshold (e.g. ”rEL1”) and his value will be displayed on the display
in alternating mode. If [^] or [v] will be pressed in 5 sec again, the next threshold will be
displayed, else the device comes back to the measurement mode. If a free access is enabled
(see description of ”SECu” menu), user can change the value of particular threshold pressing
button [ENTER] (see: PARAMETERS EDITION).
Input type, range of displaying values, characteristic of conversion, decimal point
position and measure filtering ratio, are user configurable parameters. All accessible
parameters can be changed by entering the menu (see: DEVICE PROGRAMMING). Use the
local keyboard or the remote controller to do it. (Note: all parameters can be remote c hanged
via RS-485 interface).
Configuration of the device (via menu or RS-485 interface) does not stop
measures.
6.2. DETECTION OF THE PEAK VALUES
The DU-4x0-W controller is equipped with peaks detection function. It can detect a
peaks of the input signal and display their values. Presets connected with this function are
placed in ”HOLd” menu (see description of ”HOLd” menu). The detection of the peak can be
done if the measured signal raises and drops of value at least equal to parameter ” EA”.
Detected peaks are displayed during the time defined by parameter ”timE”. If a new peak will
be detected while one is displayed, this new peak will be displayed and display time counter
will be cleared (Figure .3). If no peaks are detected while time ”timE” elapses, device starts
to show the current value of input signal again. If „HdiS”=”HOLD” then setting parameter
"timE"=0.0 causes holding peak value until [ESC] button is pressed. If „HdiS”=”rEAL” then
value "timE"=0.0 means no holding. Displaying peak value is signalized by flashing most right
decimal point.
The relays/LEDs and the current output can be controlled depend on the current value of
input signal or the peak value (see ”HOLd” menu).
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User manual - METER PDU-4x0-W
Figure 6.3. Process of peaks detectio
6.3. CONTROL OF THE RELAY OUTPUTS
The control of the object (measured signal) is realized via relay outputs. Front panel
LEDs named „R” indicates the state of particular relay output.
If device is not equipped with one or more relay outputs, menus refer to this relays
are available, but apply to LED indicators only. In such case LEDs indicates
exceeding of particular thresholds.
Modes of the control can be changed depend on the values of parameters “SEt ”, “SEt2”,
“HYSt”, “modE”, “t on”, “toFF”, “unit” and “AL”. Depend on “modE” parameter, relays
can be not used or controlled over one or two thresholds values.
If one threshold is used (Figure .4) the relay can be turned on (“modE” = ”on”) or off
(“modE” = ”oFF”) when the input signal value is contained in zone A. If two thresholds are
used (Figure .5) the relay will be turned on when value of input signal is contained in zone A
(“modE” = ”in”) or zone B (“modE” = ”out”) and turned off if the signal is contained in the
second one.
Figure 6.4. O e threshold co trol of the relay/LED outputs
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”timE”
measure
time
”timE”
” EA”
” EA”
real measurement result
display value
zone A
zone B
measure
”SEtP” parameter
”HYSt” parameter
state of
relay/LED
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User manual - METER PDU-4x0-W
Figure 6.5. Two threshold co trol of the relay/LED outputs
The relay outputs and LEDs (named R) can be controlled depend on both - the
current value and the peak value (when peak detection is active) of the input signal.
6.3.1. One threshold mode
Figure . presents the principle of relay outputs operation for one threshold mode, and
an example values of other parameters.
Description:
A, B, C, D - points where measured signal exceeds border values (expected value ± allowed deviation)
BON ,BOFF ,DON ,DOFF - relays state changes moments: (for “t on” > 0, “toFF” > 0)
tA , tB , tC , tD- time periods while input signal is in zone A or zone B
Figure 6.6. Pri ciple of LED/relay output operatio for o e threshold mode
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“SEt ” parameter
(expected signal value)
“HYSt” parameter
(allowed signal
deviation)
measured
signal
displayed value
time
time
time
AB
CD
relay state
(modE = on
t on = 0
toFF = 0)
relay state
(modE = on
t on > 0
toFF > 0)
tAtBtCtD
BON
DOFF
relay state
(modE = oFF
t on = 0
toFF = 0)
relay state
(modE = oFF
t on > 0
toFF > 0)
“toFF”
parameter
“t on”
parameter
BOFF
DON
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
“t on”
parameter
“toFF”
parameter
zone A
zone B
zone B
zone A
zone B
measure
”SEtP” or ”SEt2” parameter
”HYSt” parameter
state of
relay/LED
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