Arthur Grillo DPC200-MOD User manual

Installation and operation manual
DPC200-MOD
DIFFERENTIAL PRESSURE / VOLUME FLOW
CONTROLLER
Low pressure sensor with
PI-control and Modbus RTU digialisation
Doc.-no.: DPC200-MOD_02_EN Issue: 08/2019

Doc.-no.: DPC200-MOD_02_EN Issue: 08/2019
2
Manufacturer:
Phone:
Fax:
E-mail:
Website:
Issue:
Doc.-no.:
Arthur Grillo GmbH
Am Sandbach 7
40878 Ratingen
0 21 02 - 47 10 22
0 21 02 - 47 58 82
[email protected]
www.grillo-messgeraete.de
www.sensor-store.de
08/2019
DPC200-MOD_02_EN
This documentation including all parts is protected by copyright.Any utili-
sation or modication other than permissible under the strict limitations of
copyright law is prohibited and liable to prosecution without the approval
of the Arthur Grillo GmbH.This applies in particular to duplications, trans-
lations, microlming and storage and processing in electronic systems.

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TABLE OF CONTENT
Table of content
1 General safety instructions
1.1 Signal words for safety instructions
1.2 Used pictograms and symbols
1.3 General notes
2 Product description
2.1 Type plate
2.2 Intended use
2.3 Functional description
3 Installation
3.1 Dimensions
3.2 Wall mounting
4 Start up
4.1 Overview DPC200-MOD
4.2 Schematic view inside
4.3 Pressure connections
4.4 Electrical connection
4.5 Zero adjustment
5 Operation
5.1 Start menu
5.2 Menu structure
5.3 Start up & modbus control
5.4 Measuring mode
5.5 Control mode
5.6 Adjustable parameters
5.7 Threshold calculation
5.8 Modbus RTU
6 Maintenance
7 Warranty
8 Troubleshooting
9 Disposal
10 Specications     
10.1 CE-labelling
04
04
04
04
05
05
05
05
06
06
06
07
07
07
07
08
08
08
08
09
10
10
11
12
13
13
16
16
16
16
17
18

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GENERAL SAFETY INSTRUCTIONS
1. General safety instructions
1.1 Signal words for safety instructions
The safety instructions in this operation manual are designed to prevent hazards.They can
be found in the operation manual before an operation / task / activity is described, which
can entail a possible hazard.
Identication of a hazard with a low risk, which can lead to material
damage or minor or moderate bodily injuries.
CAUTION
1.2 Used pictograms and symbols
In this manual the following symbols are used:
General hazard symbol (dan-
ger, warning, caution)
Signal word for important information regarding the product, which
needs to be specically pointed out.
NOTICE
Hazard word Type of hazard
Hazard source
Hazard prevention
1.3 General notes
This manual contains information for installation and operation of
the pressure controller and is exclusively for the operator and ex-
pert staff. The guidelines in this manual will help to avoid danger
and downtime.
NOTICE
General information

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2. Product description
The DPC200-MOD is a measuring device for low pressure of inert gas, particularly of air.
The device has both a 0...10 V signal output as well a Modbus RTU interface for digital
communication.
2.1 Type plate
1. Product name
2. Measuring range
3. Supply voltage
4. Signal output
5. Serial no.
6. Manufacturer
2.2 Intended use
The DPC200-MOD has been researched to bundle functions needed in the HVAC in-
dustry into one device. As a precise differential pressure sensor it can transmit meas-
urements for both pressure and air ow. The integrated PI control logic is an important
component in decentralized closed loop control systems, where pressure and air ow
have to be constantly controlled.The additional Modbus RTU interface is intended for the
digitalisation of industrial processes. For direct analog processing, a 0...10 V signal output
is available. This signal can be congured as a linear / square root measuring signal or as a
manipulated variable of the closed loop controller.
2.3 Functional description
A diaphragm measuring system is used as sensor element.This system consists of a thin
diaphragm, a spring adapted to the measuring range and the pressure chamber of the
housing. Combined with a differential transformer, it results in a precise, robust and dura-
ble measurement method.The evaluation takes place in the microprocessor electronics, in
which each device is individually linearized and ne-tuned to the respective measuring range.
The DPC200-MOD provides two function options:
1. Measuring device: In this mode, the determined differential pressure is shown on
the display and made available as a proportional 0...10 V DC output signal.
2. Control mode: The PI algorithm calculates the measured differential pressure against
the set point and controls the manipulated variable so that a constant pressure behav-
iour is achieved in accordance with the set point.The manipulated variable is available
as a 0...10 V DC signal.
In addition to the measured variable “differential pressure”,the measured variable “volume
ow” can also be used for measurement and control.
PRODUCT DESCRIPTION
1.
2.
3.
4.
5.
6.

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INSTALLATION
3. Installation
The differential pressure controller DPC200-MOD is designed for wall mounting.
• The mounting surface must be solid enough and vibration-free.
• The environment has to fulll the ambient climatic conditions as given in the technical
data.
Material damage
Read the manual carefully before installation and operation
Only experienced stuff may connect the device and bring it into
operation.
CAUTION
3.1 Dimensions
All dimensions in mm.
ø6
ø5
M16x1,5
4,5
-+
104
54 95
70
• The device is position depended.
• The DPC200-MOD must be mounted vertically.
NOTICE
3.2 Wall mounting
1. Hold the DPC200-MOD against the wall. Mark the mounting holes.
2. Drill mounting holes for properly sized screws.
3. Put the screws through the housing mounting holes.
4. Tighten screws.

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START UP
4. Start up
4.1 Overview DPC200-MOD
1. Front cover
2. Cable gland
3. Pressure connection 1
4. Pressure connection 2
5. Cable gland
1.
2.
3.
4. 5.
4.2 Schematic view inside
Button B1 and B2 serve for the operation of the menu
4.3 Pressure connections
Connect all pressure connections properly with plastic tubing (inner diameter 5 or 6 mm).
Button 1 Button 2

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OPERATION
4.4 Electrical connection
1. Unscrew screws of the front cover.
2. Open front cover.
3. Use M16 cable glands for connecting wiring to terminals.
4.5 Zero adjustment
The output signal offset can be zeroed from the outside with a small bar magnet.
Do not use buttons B1 or B2.
Adjustment:
• Remove the tubing from the pressure
connections.
• Hold the bar magnet (N/S) as shown here
to the zero point adjustment for a short
period of time to activate an internal reed
switch.
The new zero point will be displayed and
stored.
5. Operation
5.1 Start menu
For operating the menu, unscrew the front cover to reach buttons B1 and B2.
N S
+ 15...30 Vdc oder 24 Vac (±15%) Versorgung
- GND
+ 0...10 Vdc Ausgang
- GND
1
2
3
4
5
6
ΔP
DPC200-MOD
Elektrischer Anschluss
B
MODBUS
A
+ 15...30 Vdc or 24 Vac (±15%) supply
- GND
+ 0...10 Vdc output
- GND
1
2
3
4
5
6
ΔP
B
MODBUS
A
DPC200-MOD

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OPERATION
5.2 Menu structure
∆P control mode
∆P = 150 Pa
menu
modbus
on >off< modbus >on< off
modbus address
1
modbus baud rate
9600
Press B1
button
Press B2 button Press B2 button
modbus parity
none
Press B1: Reset
Press B2: Select
Press B1: Confirm
Display flashes once
Press B1: choose among
7200, 9600, 14400,
19200, 38400, 57600
Press B1: choose
among none, even, odd,
none_2_sop_bits
Press B2 button
Press B2 button
Press B2 button
Press B1 about 2 seconds to start menu.
unit
imperial
operating mode
measuring mode
parameter
diff. pressure
operating mode
control mode
parameter
volumne flow
fan k-factor
k = 70
characteristic
linear
parameter
diff. pressure parameter volumne flow
setpoint
50 pA
output voltage
U = 10,0v
p - parameter
50
i - parameter
3,15
controling mode
positive / heating controling negative / cooling
back and confirm Press B1 button
to leave menu
∆P control mode
∆P = 150 Pa
unit
metric
fan k-factor
k = 70
Press B1: Reset
Press B2: Select
Press B1: Confirm
Display flashes once
Press B1
button
menu
Press B2 button
Press B1 button
Press B2 button Press B2 button
Press B2 button
Press B2 button
Press B2 button
Press B1
button
Press B1
button
Press B1
button
Press B2 button to stay in the menu
Press B1: Reset
Press B2: Select
Press B1: Confirm
Display flashes once
Press B1: Reset
Press B2: Select
Press B1: Confirm
Display flashes once
Press B1: Reset
Press B2: Select
Press B1: Confirm
Display flashes once
Press B1: Reset
Press B2: Select
Press B1: Confirm
Display flashes once
Press B2 button Press B2 button
Press B2 button Press B2 button
Press B2 button
Press B2 button
Press B2 button
Press B2 button
characteristic
square root
Press B1
button
Press B2 button

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OPERATION
5.4 Measuring mode
If selected parameter = ON
modbus address
1
Button B1: reset value
Button B2: set value
Button B1: confirm value, display flashes once
Press button B2 to get to the next menu item
modbus baud rate
9600
Button B1: choose among 7200, 9600, 14400, 19200, 38400, 57600
Press button B2 to get to the next menu item
modbus parity
none
Button B1: choose among none, even, odd, none_2_stop_bits
Press button B2 to get to the next menu item
unit metric
Press button B1 to switch between:
metric <=> imperial
Press button B2 to get to the next menu item
operating mode
control mode
Press button B1 to switch between:
measuring mode <=> control mode
Press button B2 to get to the next menu item
parameter
diff. pressure
Press button B1 to switch between:
diff. pressure <=> volume flow
Press button B2 to get to the next menu item
5.3 Start up & modbus control
Display Action
controlling mode
ΔP=150Pa
Start menu: Press button B1 approx. two seconds
menu Press button B2 to get to the next menu item
modbus Press button B1 to switch between: on <=> off Press button B2 to
get to the next menu item
Ifselectedparameter=volumeow
fan k-factor
k = 70
Button B1: reset value
Button B2: set value
Button B1: conrm value, display ashes once
Press button B2 to get to the next menu item
characteristic
linear
Press button B1 to switch between:
linear <=> square root
Press button B2 to get to the next menu item
backandconrm Press button B1 to leave the menu
Press button B2 to stay in the menu
If selected parameter = diff. pressure
characteristic
linear
Press button B1 to switch between:
linear <=> square root
Press button B2 to get to the next menu item
backandconrm Press button B1 to leave the menu
Press button B2 to stay in the menu

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OPERATION
5.5 Control mode
If selected parameter = diff. pressure
setpoint
50 Pa
Button B1: reset value
Button B2: set value
Button B1: conrm value, display ashes once
Press button B2 to get to the next menu item
output voltage
U = 10.0V DC
Button B1: reset value
Button B2: set value
Button B1: confirm value, display flashes once
Press button B2 to get to the next menu item
P - parameter
50
Button B1: reset value
Button B2: set value
Button B1: confirm value, display flashes once
Press button B2 to get to the next menu item
l - parameter
3.15
Button B1: reset value
Button B2: set value
Button B1: confirm value, display flashes once
Press button B2 to get to the next menu item
controlling mode
positive / heating
Press button B1 to switch between:
positive / heating <=> negative / cooling
Press button B2 to go to the next menu
backandconrm Press button B1 to leave the menu
Press button B2 to stay in the menu
Display Action
controlling mode
ΔP=150Pa
Start menu: Press button B1 approx. two seconds
menu Press button B2 to get to the next menu item
modbus
Press button B1 to switch between:
on <=> off
Press button B2 to get to the next menu item
unit metric
Press button B1 to switch between:
metric <=> imperial
Press button B2 to get to the next menu item
operating mode
control mode
Press button B1 to switch between:
measuring mode <=> control mode
Press button B2 to get to the next menu item
parameter
diff. pressure
Press button B1 to switch between:
diff. pressure <=> volume flow
Press button B2 to get to the next menu item

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OPERATION
5.6 Adjustable parameters
Parameter Selection or parameter range default
Modbus ON or OFF ON
Modbus
address 1...247 1
Modbus
baudrate 7200, 9600, 14400, 19200, 38400, 57600 19200
Modbus
parity none, even, odd, none_2_stop_bits none
Unit Pa and m³/h or InH20 and cfm Pa and m³/h
Operating
mode Measuring mode or control mode measuring mode
Parameter Differential pressure ΔP [Pa] or [InH2O]
Volume flow V [m3/h or cfm]
differential
pressure ΔP
[Pa]
Chracteristic curve linear or square root linear
K-factor:
Volume flow calculation according to: V = k · √Δp
with: V = Volume flow in [m3/h] or [cfm]
k = flow factor, adjustment range: 1...10,000
Δp = differential pressure in [Pa] or [InH2O]
volume flow display indication up to 999,999 [m3/h or cfm] in
measuring mode and control mode
K = 70
Setpoint
differential pressure from 0 % p to 100 % of measuring range Set = 8888
volume flow from 0,5 % up to 100 % of measuiring range,
k-factor is considered Set = 8888
Output
voltage 0…10.0 V dc Uout = 10 V dc
P-gain 0...1,000 P = 50
I-gain 0…100.00 I = 3.15
Control
characteristic
positive/(heating): Control deviation = set value – actual value
The output increases when: Set value > actual value
negative/(cooling): Control deviation = actual value – set value
The output increases when: Actual value > set value
positive /
heating
Ifselectedparameter=volumeow
than follows the additional input for the k-factor
fan k-factor
k = 70
Button B1: reset value
Button B2: set value
Button B1: conrm value, display ashes once
Press button B2 to get to the next menu item
OPERATION

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OPERATION
5.7 Threshold calculation
NOTICE The device requires a minimum pressure to calculate a volume
ow.
Minimum pressure = 0.5 % of the product mesuring range
PRESSURE < 0.5 % measuring range = Display shows 0 m3/h
Minimal ow: V_min = √(0.005 x measuring range) x k
Maximal ow: V_max = √(measuring range) x k
Exampel: Threshold calculation
The set limit value must be between minimum and maximum ow.
As reference device we choose DPC200-MOD with a measuring range of 0...1000 Pa.
The limit value calculation formula: V = √ΔP × k
Given values:
Measuring range = 0...1000 Pa; k-factor (k) = 116; Limit value (V) = 1,200 m3/h
It follows: ΔP= (V / k)2 = (1,200 / 116)2= 107 Pa > 5 Pa = 0.5 % of the measuring range
Minimal ow: V_min = √(0.005 x 1000) x 116 = 259 m3/h
Maximal ow: V_max = √(1000) x 116 = 3,668 m3/h
Result: The limit value of 1,200 m3/h is betweenV_min and V_max and adjustable by
our DPC200-MOD (0...1000 Pa).
5.8 Function description - modbus
Hardware features:
The DPC200-MOD has two connection terminals for the Modbus, which are designated A
and B.The Modbus line of the DPC200-MOD can be terminated via a further jumper.This
jumper can be plugged into two positions: terminated or not terminated.The terminating
resistor is 120 Ohm.
Termination:
A device may only be terminated, if it is at the end of a line.Termination serves to dampen
reections of signals and the resulting harmonic oscillations.
OPERATION
Changes to the holding register are saved to the device’s eeprom.
The durability is 100000 times, and should not be exceeded.
NOTICE

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Communication baud rate:
The communication baud rate indicates the transmission rate in bits per second. It must
be the same throughout the Modbus network.
Parity check:
The parity check is a method for error detection in binary coded data. With this method a
parity bit is sent with each byte which contains the information of modulo two. The parity
setting must be the same throughout the network.
The DPC200-MOD supports the following parity modes:
none No parity check is performed and no additional parity bit is sent.
even The parity bit is / must be HIGH, if the preceding byte modulo 2 is
equal to zero.
odd The parity bit is / must be HIGH, if the preceding byte modulo 2 is
equal to one.
none 2 stop bits No parity check is made, instead of the parity bit another stop bit
is sent.This mode is suitable for heavily disturbed connections.
Telegram structure:
A send telegram always consists of two bytes and three words.
8bit 8bit 8bit 8bit 8bit 8bit 8bit 8bit
ID FC DA DA D D CRC CRC
8bit 8bit 16bit 16bit 16bit
The telegram is transmitted byte wise, only in the Modbus context, some bytes are
regarded as words.
Function code
The device supports three function codes: 0x03 = read holding register
0x04 = read input registers
0x06 = write single register
ID = Modbus adress FC = function code DA = data address D = data CRC = checksum
Menu features:
The DPC200-MOD menu has been extended by four more points.
1) modbus
ON / OFF
Modbus func-
tion on and off 3)
modbus baud rate
7200 / 9600 / 14400 /
19200 / 38400 / 57600
communication
baud rate
2) modbus address
1 - 247
device adress /
device ID 4)
modbus parity
none / even / odd /
none 2 stop bits
parity check
Byte = 8bit 11111111 (U)SINT (Short-Integer)
Wort = 16bit 11111111 11111111 (U)INT (Integer)
OPERATION

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Function Code 0x04:
E X A M P L E
request: 05 04 00A0 0001 306C
05 ID of the device.
04 Function code.
00A0 Data address to be read.
0001 Number of registers to be read.
306C Calculated CRC.
reply: 05 04 00A0 0000 48F0
05 ID of the device.
04 Function code.
0002 Number of consecutive bytes
(1 x register = 2 x bytes).
0000 Data that was read.
48F0 Calculated CRC.
Function Code 0x06:
E X A M P L E
request: 05 06 00C0 0001 49B2
05 ID of the device.
06 Function code.
00C0 Data address to be described.
0001 Data to be written.
49B2 Calculated CRC.
reply: 05 06 0001 0001 184E
05 ID of the device.
06 Function code.
0001 Number of registers that
have been described.
0001 Data that was written.
184E Calculated CRC.
Holding register (read and write register):
Register name: data address: range of values: decimal:
metric / imperial 0x00C0 0x0000 - 0x0001 metric=0 / imp=1
measurand ΔP / V 0x00C1 0x0000 - 0x0001 ΔP=0 / V=1
K-factor 0x00C2 0x0000 - 0x2710 1...10000
characteristic lin / rad 0x00C3 0x0000 - 0x0001 lin=0 / rad=1
control / meassure 0x00C4 0x0000 - 0x0001 ctrl=0 / measure=1
set point HIGH share 0x00C5 0x0000 - 0x000F 999999
set point LOW share 0x00C6 0x0000 - 0x423F
Max output voltage 0x00C7 0x0000 - 0x0064 0...10.0 V
P. parameter 0x00C8 0x0000 - 0x03E8 0...1000
I. parameter 0x00C9 0x0000 - 0x2710 0...100.00
sense of control pos / neg 0x00CA 0x0000 - 0x0001 pos=0 / neg=1
Holding register (write only register):
Register name: data address: range of values: decimal:
zero adjustment 0x00B0 0x0001 1
Input register (read only register):
Register name: data address: range of values: decimal:
differential pressure 0x00A0 0x0000 - 0xFFFF per measuring range
signal output 0x00A1 0x0000 - 0x03E8 0...100.0 %
volume ow HIGH share 0x00A2 0x0000 - 0x000F 999999
volume ow LOW share 0x00A3 0x0000 - 0x423F
measuring range 0x00A4 0x0000 - 0xFFFF per measuring range
OPERATION

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6. Maintenance
The DPC200-MOD contains no wearing or consumable parts. Servicing is not required.
On request, Arthur Grillo GmbH offers an annual calibration with factory certicate.
For information, please contact:
7. Warranty
Warranty and liability claims for personal and property damage are excluded if they are
caused by one or more of the following reasons:
• Improper use of the device.
• Improper installation, commissioning, operation and maintenance of the device.
• Unauthorized modications to the device beyond the intended use.
• Disasters due to external inuences and force majeure.
8. Troubleshooting
Description Activity
Display does not show
anything Check electrical connection
Measurement stays zero Function test with a slight pressure increase in measu-
ring mode for differential pressure
Measuring error Perform zeroing as described in chapter 4.5.
Error remains Contact manufacturer
Arthur Grillo GmbH Phone: +49 21 02 - 47 10 22
Am Sandbach 7 Fax: +49 21 02 - 47 58 82
40878 Ratingen E-mail: [email protected]
9. Disposal
Dispose of parts so as not to endanger the human health or environment. Follow the laws
in the country of use for disposing of electronic components and devices during disposal.
WARRANTY & SUPPORT

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10. Specications
Mode:
Measuring medium:
Measuring principle:
Measuring unit:
Lowest span:
Highest span:
Adjustable controlling
parameters:
Signal output characteristic:
Control characteristic:
Setpoint setting:
Modbus Communication
Protocol:
Baud rate:
Device adress / ID:
Parity check:
Telegram structure:
Housing:
Weight:
Protection class:
Display:
Pressure connections:
Electrical connections:
Supply voltage:
Current consumption:
Signal output:
Ambient temperature:
Storage temperature:
Overpressure protection:
Static pressure:
Inuences / limits:
Interference / emission:
Measuring or controlling mode
Air or inert gases
Silicon diaphragm with spring and differential transformer
Pa / inH2O oder m3/h oder cfm
0...50 Pa
0...6000 Pa
P/I - parameter, k-factor, maximum output voltage, normal/
inverse control
linear or square root
PI - algorithm
setpoint adjustable within software
Modbus RTU
selectable in menu, 7200...57600
selectable in menu, 1...247
selectable in menu, none, even, odd, none2stopbits
8 Bit ID; 8 Bit FC; 16 Bit DA; 16 Bit D; 16 Bit CRC
UL 94 HB; Case polyamid, cover ABS
approx. 250 g
IP 54 according EN 60529
LCD-Display, 2 x 16 characters
tubing 5 mm ø or 6 mm ø
cable inlet M16 x 1.5, screw terminal, Electronic protec-
tion against reversed polarization
22...26 Vdc; 24 Vac (±10%)
approx. 30 mA @ 24 Vdc; < 1 W Power
0...10 V; Imax= 1.0 mA, Rmin= 10 kΩ
-10...50 °C
-25...60 °C
0.2 bar
max. 0.2 bar
Zero error: ± 0.75 %
Sum of linearity and hysteresis : ± 0.5 % ... ± 1 %
Temperature drift, zero point: ± 0.3 % / 10 K
Temperature drift, span: ± 0.2 % / 10 K
according EN 61000-6-2, EN 61000-6-3, CE mark
SPECIFICATIONS

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18
CE-LABELLING
10.1 CE-labelling
As an electric device the DPC200-MOD falls within the scope of the directive 2004/108/
EG (EMV-directive). In the scope of the EMV-directive the following norms were applied:
DIN EN 61000-6-2:2006-03
correction 1:2011-06
Electromagnetic compatibility (EMC) - Part 6-2: Generic
standards - Immunity for industrial environments
DIN EN 61000-6-3:2011-09
Electromagnetic compatibility (EMC) - Part 6-3: Generic
standards - Emission standard for residential, commer-
cial and light industrial environments
You can order the Declaration of Conformity at:
Arthur Grillo GmbH
Am Sandbach 7
40878 Ratingen
Phone: 0 21 02 - 47 10 22
Fax: 0 21 02 - 47 58 82
E-mail: [email protected]