DKS PD96 User manual

USER MANUAL for
meter with U/I input
type: PD96
firmware version: 5.18 or higher
Read the user's manual carefully before starting to use the unit.
Producer reserves the right to implement changes without prior notice.
25.03.2010 V.2.04
Radeberger Straße 21 –D-01900 Großröhrsdorf
E-Mail: [e-mail]
Tel.: [phone]
WEB: https://www.dks-engineering.com

User manual for meter with U/I input PD96
2
Contents
1. Basic requirements and user safety 4
2. General characteristics 5
3. Technical Data 6
4. Device installation. 8
4.1. Unpacking 9
4.2. Assembly 9
4.3. Connection method 10
4.4. Maintenance 17
5. Front panel description 17
6. Principle of operation 18
6.1. Measurement mode 18
6.2. Detection of the peak values 19
6.3. Control of the relay outputs 20
6.3.1. One threshold mode 22
6.3.2. Two thresholds mode 24
7. Device programming 25
7.1. Programming menu 25
7.2. Parameters edition 26
7.2.1. Numeric parameters (digit change mode) 27
7.2.2. Numeric parameters (slide change mode) 27
7.2.3. Switch parameters (“LIST” type) 27
7.3. Menu description 28
7.3.1. “rEL1” menu 28
7.3.2. “inPt” menu 31
7.3.3. ”bri” parameter 35
7.3.4. ”HOLd” menu ...........................................................................35
7.3.5. ”SECu” menu 36
7.3 6. ”rS” menu 36
7.3 7. ”Edit” parameter 37
7.3 8. ”dEFS” parameter 37
7.3 9. ”SErv” menu 38
7 4. Menu structure 38
8. The alarm LED 40
9. Over-current protection 40
10. Displayed values calculation 40
10 1. Additional calculations (used conversion characteristic) 41
10.1.1. Linear characteristic 41
10.1 2. Square characteristic 42
10.1 3. Square root characteristic 42
10.1.4. User defined characteristic 44

User manual for meter with U/I input PD96
3
10.2. Examples of calculations 44
11. The modbus protocol handling 47
11.1. List of registers 47
11.2. Transmission error description 50
11.3. Examples of query/answer frames 51
12. Default and user´s settings list 53

User manual for meter with U/I input PD96
4
Explanation of symbols used in the manual:
This symbol denotes especially important guidelines concerning the installation
and operation of the device. Not complying with the guidelines denoted by this
symbol may cause an accident, damage or equipment destruction.
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
This symbol denotes especially important characteristics of the unit.
Read any information regarding 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 technical
condition and using the unit against its destination.
- 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 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 defect of unit operation 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 mating equipment must meet the requirements of
appropriate standards and regulations concerning safety and be equipped
with adequate anti-overvoltage and anti-interference filters.
- Do not attempt to disassemble, repair or modify the unit yourself. The
unit has no user serviceable parts. Units, in which a defect was stated
must be disconnected and submitted for repairs at an authorized
service centre.

User manual for meter with U/I input PD96
5
2 General characteristics
The PD96 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 PD96 allows user to
select a conversion characteristic of several kinds: linear, square, square root, and user
defined (max.20 points length). Result is showed on 4- digit LED display. Displayed
values range can be selected by user, from -999 to 9999, plus decimal point.
The device can be equipped with two relay (or OC type) outputs. Device PD96is
equipped with PD96 communication interface and sensor supply output. The meter can
be ordered in three 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
changepresets without opening the cover, an IR sensor is mounted. Remote controller
keyboard isequivalent to the device keyboard (Note, that remote controller is not a part
of the PD96 set –it is an additional equipment).
PD96 can be used for controlling and regulation of processes need proportional and
threshold control like: temperature processes (heating or cooling), valves controlling or
other.
- Do not use the unit in areas threatened with excessive shocks,
vibrations, dust, humidity, corrosive gasses and oils.
- Do not use the unit in explosion hazard areas.
Do not use the unit in areas with significant temperature variations,
exposed to condensation or icing.
- 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.

User manual for meter with U/I input PD96
6
3 Technical data
Power supply voltage
(depending on version)
External fuse (required)
Power consumption
230V AC ± 10%, 50 ÷ 60 Hz
or 110V AC ± 5%, 50 ÷ 60 Hz
or 24V DC ± 15%, (not separated)
T - type, max. 2 A
max. 2.6 VA @ 230V AC and @ 110V AC
max. 4.5 VA @ 24V DC
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 < 65 W (typical 55 W)
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 kW
Temperature stability 50 ppm / °C
Display range -999 ÷ 9999, plus decimal point
Accepted prolonged input overload 20%
Outputs relay: 0 or 2 NO, 1A/250V AC (cos j = 1)
or OC-type: 0 or 2 30mA / 30VDC / 100mW
sensors power supply U0: not stabilized, not separated from measuring
inputs,
in 230V AC and 110V AC version:
UO = 24V DC ± 3V / max. 25 mA;
in 24V DC version:
UO = US / max. 100 mA, RO = 30 W,
(where US - device power supply, RO -
internal
resistance for sensor power supply output);
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

User manual for meter with U/I input PD96
7
Protection level P 65
Housing type wall mounted
Housing material ABS + fibreglass
Housing dimensions
without glands: 110 x 80 x 67 mm
with glands: 110 x 105 x 67 mm
Operating temperature
(depending on version)
Storage temperature
(depending on version)
0°C to +50°C
or -20°C to +50°C
-10°C to +70°C
or -20°C to +70°C
Humidity 5 to 90% no condensation
Altitude up to 2000 meters above sea level
Screws tightening max. torque 0,5 Nm
Max. connection leads diameter 2,5 mm2
Safety requirements according to: PN-EN 61010-1
installation category: II
pollution degree: 2
voltage in relation to ground: 300V AC
insulation resistance: >20MW
insulation strength between power supply and
input/output terminal: 1min. @ 2300V
insulation strength between relays terminal:
1min. @ 1350V
EMC according to: PN-EN 61326-1
This is a class A unit. In housing or a similar area it can cause
radio
frequency interference. In such cases the user can be requested to
use appropriate preventive measures.

User manual for meter with U/I input PD96
8
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.
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 on the housing and report the damage to the manufacturer.
Attached with the unit please find:
- user’s manual,
- warranty,
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 clamps against unauthorized persons must
be taken into consideration.

User manual for meter with U/I input PD96
9
4.2. Assembly
Figure 4.1. Device and assembly dimensions
- Disconnect the power supply prior to starting assembly.
- Check the correctness of the performed connections prior to switching
the unit on.
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 bemounted
to a wall by screws.

User manual for meter with U/I input PD96
10
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 minimal
possible 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.
- 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 clamps (marked as n.c.) must not be used for connectingany
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 packing, 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.

User manual for meter with U/I input PD96
11
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 common (parallel) leading of signal cables and transmission cables together with
power supply cables and cables controlling induction loads (e.g. contactors). Such
cables should cross at a right angle.
– Contactor coils and induction loads should be equipped with anti-interference
protectionsystems, 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 couples of signal
cables (so-called “spirals”) is recommended. The spiral (best if shielded) must be
used with RS-485 serial transmission connections.
– In the case of interference from the power supply side the use of appropriate
antiinterference 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 earthing with largest possible surface. The cables
connected to the filter output must not run in parallel 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 screw connectors mounted inside the housing.
Figure 4.2. Mehtod of cable insulation replacing and cable terminals
All connections must be made while power supply is disconnected !

User manual for meter with U/I input PD96
12
Figure 4.3. Terminals description (relay outputs)
Figure 4.4. Terminals description (OC- type outputs)
Figure 4.5. Connection of 2-wire current converters

User manual for meter with U/I input PD96
13
Figure 4.6. Connection of 3-wire current converters
Figure 4.7. Connection of voltage converters
Figure 4.8. Connection of power supply and 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.

User manual for meter with U/I input PD96
14

User manual for meter with U/I input PD96
15
Figure 4.11. Connections of 2-wire sensor:
a) active, b) passive (needs additional supply)
PD96 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 4.14, 4.15).
If RS-485 interfaces are isolated or not used then the separators are not
necessary.
Figure 4.12. Serial connection of active 2-wire sensor with PD96 unitand
other current measurement device (e.g. PLC controller)

User manual for meter with U/I input PD96
16
Figure 4.13. Serial connection of passive 2-wire sensor with PD96 unitand
other current measurement device (e.g. PLC controller).
If device B (Figure 4.14 , 4.15) 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 4.15. Used symbols are described below.
U
s min.
- minimal sensor supply voltage (given in technical data of
sensor),
Ug- voltage drop on galvanic separator input (constant for 4-20 mA
range ofcurrent),
Imax
= 20 mA
- maximal current of current loop,
U0
= 24 V
- sensor supply output voltage of device A,
R0
= 30 Ω
- sensor supply output resistance of device A,
RINP.
= 50 Ω
- measurement input resistance of device A,

User manual for meter with U/I input PD96
17
Let US min.=12V and Ug=5V then:
If current loop is closed without the separator G, then sum of measurement input
resistance (RB max.) of device B (Figure 4.15) and connections resistance (RW max.)
should be not grater than result of given below formula:
For example if US min.=12V then:

User manual for meter with U/I input PD96
18
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 thefault-free time of unit 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 and electronic products.
5. Front panel description

User manual for meter with U/I input PD96
19
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
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 6.1, 6.2).
Figure 6.1. Definitions of measurement ranges in mode 4 ÷ 20mA

User manual for meter with U/I input PD96
20
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 3.2. Definitions of measurement ranges in mode 0 ÷ 20mA
If the measurement value do not exceeds 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 afree 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 changed via RS-485 interface).
Configuration of the device (via menu or RS 485 interface) do not stops
measures.
6.2. Detection of the peak values
The PD96 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 ”PEA”.
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