Burkert 8624 User Manual [en, de, fr]
Type 8624-2
Standard
Compact Flow Pressure Controller
Kompakter Fließdruckregler
Régulateur compact de pression d‘écoulement
Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© 2002 - 2009 Bürkert Werke GmbH
Operating Instructions 0912/07_EU-ML_00803180 / Original DE
CONTENTS
1 GENERAL NOTES................................................................................................................ 3
1.1 Symbols ..................................................................................................................................................... 3
1.2 Safety notes ........................................................................................................................................ 3
1.3 Protection form damage by electrostatic charging ........................................ 4
2 FUNCTION ...................................................................................................................................... 5
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3 APPLICATION AREA
3.1 Pressure control for constant pressure in flowing media ......................... 6
3.2 Control of other variables ........................................................................................................ 7
...................................................................................................... 6
4 TECHNICAL DATA .............................................................................................................. 8
5 COMMISSIONING
5.1 Connecting to the proportional valve ........................................................................... 9
5.2 Changing the cable outlet direction .............................................................................. 10
5.3 Connection configuration on the flow pressure controller
type 8624-2 ......................................................................................................................................... 11
5.4 First commissioning .................................................................................................................... 12
................................................................................................................. 9
6 OPERATING THE FLOW PRESSURE CONTROLLER
TYP 8624-2 .................................................................................................................................... 13
6.1 Operating modes ............................................................................................................................ 13
6.2 Indications on the display ...................................................................................................... 14
6.3 Key allocation .................................................................................................................................... 15
6.4 Standard mode ................................................................................................................................. 16
6.4.1 Standard mode and internal setpoint.............................................................. 16
6.4.2 Standard mode an external setpoint ............................................................... 17
6.5 Manual mode ...................................................................................................................................... 18
8624-2 Standard - 1
6.6 Configuration mode ...................................................................................................................... 19
6.6.1 Menu of configuration mode .................................................................................. 21
6.6.2
UNIT
- setting of unit of controlled variable ................................................ 22
SENS
6.6.3
6.6.4
6.6.5
6.6.6
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6.6.7
6.6.8
6.6.9
6.6.10
- setting of sensor input .............................................................................. 23
MODE
- setting of setpoint mode ........................................................................ 25
AMPL
- setting of amplification K
INTG
- setting of reset time T
INV
- setting of inverted/non-inverted control ........................................... 33
ZERO
- zero point switch-off ................................................................................... 34
VALV
- adaptation of controller output signal ......................................... 35
END
- storage of the values .................................................................................... 37
...................................................................... 27
P
................................................................................ 28
N
6.7 Settings on delivery..................................................................................................................... 38
7 ERROR MESSAGES....................................................................................................... 39
2 - 8624-2 Standard
1 GENERAL NOTES
1.1 Symbols
The following symbols are used in these operating instructions:
Marks a work step that you must carry out.
ATTENTION!
NOTE
marks notes on whose non-observance your health or the
functioning of the device will be endangered.
marks important additional information, tips and
recommendations.
1.2 Safety notes
Please observe the notes in these operating instructions together with the
conditions of use and permitted data that are specified in the data sheets of the
proportional valve used and of the controller type 8624-2, in order that the
device will function perfectly and remain operable for a long time:
• Keep to standard engineering rules in planning the use of and operating the
device!
• Interference with the device is only allowed by specialist personnel using
suitable tools!
• Observe the current regulations on accident prevention and safety for
electrical devices during operation, maintenance and repair of the device!
• Before interfering with the system, always switch off the voltage!
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• Take suitable precautions to prevent unintended operation or damage by
unauthorized action!
• On non-observance of this note and unauthorized interference with the
device, we will refuse all liability and the guarantee on device and
accessories will become void!
8624-2 Standard - 3
1.3 Protection from damage by electrostatic charging
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This device contains electronic components that are sensitive to electrostatic
discharge (ESD). Contact to electrostatically charged persons or objects will
endanger these components. In the worst case, they will be immediately
destroyed or will fail after commissioning.
Observe the requirements of EN 100 015 - 1 in order to minimize the
possibility of, or avoid, damage from instantaneous electrostatic discharge.
Also take care not to touch components that are under supply voltage.
EXERCISE CAUTION ON HAND-
ATTENTION
LING !
ELECTROSTATICALLY
SENSITIVE
COMPONENTS/MODULES
4 - 8624-2 Standard
2 FUNCTIONS
The flow pressure controller type 8624-2 is primarily designed, in connection
with a proportional valve and a pressure transmitter, to keep constant the
pressure at a point in a fluidic system or to follow a given setpoint value.
The functionality of the device is characterized by:
• Compact design, capable of direct installation on the proportional valve.
• May be combined with valve types 6022, 6023, 6024, 6223, 2832, 2834.
• Controller ouput directly to proportional valve in the form of a PWM signal;
this minimizes hysteresis and optimizes the control performance.
• Any transmitter providing a 4 - 20 mA or 0 - 10 V signal can be connected
to the actual value input.
• The standard signal inputs can be scaled to the control range actually
required.
• Setting of setpoint value via standard 4 - 20 mA or 0 - 10 V signal, keypad
or bus.
• Digital control with a PI control algorithm and settable control parameters.
• Display of setpoint or actual values (to choice) on an LCD display with
selectable number of decimal places.
• Configuration with three keys.
The controller type 8624-2 can control not only pressure but also other fluidic
parameters such as flow rate, conductivity, etc. For this purpose, the sensor
that measures the actual value of the relevant parameter must provide a
standard 4 - 20 mA or 0 - 10 V signal.
For applications in which the sensor provides other types of signal for the
actual value, we offer suitable controllers, e.g:
Type 8623-2 for flow rate control with frequency input for the sensor
Type 8625-2 for temperature control with PT100 input for the sensor
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8624-2 Standard - 5
3 APPLICATION AREA
3.1 Control for constant pressure in flowing media
The compact flow pressure controller type 8624-2 can only control the
pressure of flowing media, i.e. a consumer must be present in the system. The
pressure of enclosed media cannot be controlled.
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Example: pressure flow control for gas burners
Burner nozzle
Fig.: Structure of a flow pressure control system with the compact flow pressure
Controller type 8624-2
Setpoint input
Actual value (4 - 20 mA bzw. 0 - 10 V)
Pressure transmitter
Controlled pressure
Proportional valve
controller type 8624-2 (schematic)
6 - 8624-2 Standard
3.2 Control of other variables
The compact flow pressure controller type 8624-2 can also control other variables whose actual value is present as an analog 4 - 20 mA or 0 - 10 V signal.
Example: flow rate control with flow transmitter.
Controller type 8624-2
Setpoint input
Actual value (4 - 20 mA bzw. 0 - 10 V)
Flow transmitter
Controlled flow
Working
resistance
Proportional valve
Fig.: Structure of a flow control system with the compact flow pressure
controller type 8624-2 (schematic)
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8624-2 Standard - 7
4 TECHNICAL DATA
Operating voltage 24 V DC
Power consumption max. 0,3 W (without proportional valve)
Output current (to valve) max. 1,0 A
Operating temperature - 10 ... + 60 °C
Interference resistance to EN50082-2
Interference emission to EN50081-2
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Inputs
1 setpoint input 4 - 20 mA or 0 - 10 V, adjustable
1 actual value input 4 - 20 mA or 0 - 10 V, adjustable
Resolution for both inputs 10 Bit
Input impedance (4 - 20 mA) < 200 Ω
Input impedance (0 - 10 V) > 300 kΩ
Output
PWM output 24 V pulse width modulated
Controller
Control algorithm PI control
Scan time T
Amplification factor K
Reset time T
Scaling of controlled variable 0,000 - 9999
A
P
N
27 ms
0 - 10,00
0,05 - 200,1 s
Housing
Cable outlet rotatable in 90° steps
System of protection IP 65
Material polyamide
Dimensions (W x H x D) 54 x 54 x 61 mm
Order no. 143 570
8 - 8624-2 Standard
5 COMMISSIONING
NOTE
Interference with the device is only allowed by specialist
personnel using suitable tools!
Before interfering with the flow pressure controller, always
switch off the voltage!
5.1 Connecting to the proportional valve
Fig.: Connecting the flow controller to the proportional valve
➔ Unscrew the 4 screws on the front panel of the flow pressure controller and
remove the cover carefully.
➔ Place the housing of the flow pressure controller with the seal onto the
valve.
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➔ Screw the flow pressure controller tightly to the valve.
ATTENTION!
➔ Place the cover on the flow pressure controller and screw it tight with the 4
screws.
ATTENTION!
On screwing the flow pressure controller onto the proportional valve, make sure the seal is correctly seated!
Make sure the cover is placed on the right way round
(pinned strips must engage in the sockets).
8624-2 Standard - 9
5.2 Changing the cable outlet direction
➔ Unscrew the 4 screws on the front
panel of the flow pressure controller and
remove the cover carefully.
➔ Remove the screw to the valve and
remove the plastic cross.
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➔ Detach the plate from the cube.
➔ Pull out the cube downwards and
replace in the desired orientation.
➔ Place the plate onto the cube (the pins
must engage in the guides).
➔ Lay on the plastic cross and insert the
screw through the cube.
➔ Connect the flow pressure controller to
the proportional valve (see 5.1).
Fig.: Changing the cable outlet direction
10 - 8624-2 Standard
5.3 Connection configuration of flow pressure controller
type 8624-2
M12, 4-pole
Supply voltage
and
standard signal input
External setpoint
M8, 3-pole
Standard signal input
Sensor
Fig.: Connections on flow pressure controller type 8624-2
M12 (4-pole): Supply voltage and standard signal for setpoint
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3 (blue)
M8 (3-pole) Standard signal input, sensor
1 (brown)
ATTENTION!
2 (white)
1 (brown)*4 (black)
4 (black)
3 (blue)*
Configuration
1 24 V DC supply voltage
2 Standard signal input, external setpoint
3 GND external setpoint
4 GND supply voltage
* wire colours when using standard cables with M12 plug
(4polig)
Configuration:
1 24 V DC output
3 GND
4 Standard signal input, sensor
* wire colours when using standard cables with M8 plug
(3pole)
Do not connect a voltage to pin 1 of the 3-pole plug! Pin 1 is a
24 V output to supply the sensor (e.g. 2-conductor
transmitter)
8624-2 Standard - 11
5.4 First commissioning
Settings absolutely necessary onfirst commissioning
• Type and range of standard signal (4 - 20 mA or 0 - 10 V)
• Lower limit for correcting variable (see 6.6.9
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VALV
)
12 - 8624-2 Standard
6 OPERATING THE FLOW PRESSURE CONTROLLER
TYPE 8624-2
6.1 Operating modes
Three modes are possible for operating the flow pressure controller type 8624-2:
• Standard mode
• Configuration mode
• Manual mode
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STANDARD
MODE
press key briefly
presss key for 5 sec
CONFIGURATION
MODE
Menu
.
.
.
END
press
key
Fig.: Switching between operating modes
MANUAL
MODE
8624-2 Standard - 13
NOTE
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• After the supply voltage is switched on, the controller is in
the standard mode.
• Change to the other modes is possible by the actions
shown in the figure.
• After the configuration mode is ended, the parameters set
are transferred to the memory of the controller.
• After the operating voltage is switched off, the parameters
last active are stored; on next switching on again, these will
be active again.
6.2 Indications on the display
to indicate the process
4-digit display
values and parameters
Bus active
Manual
mode
Indication of specified setpoint value
- internal setpoint (no display)
- external setpoint (1)
- setpoint via bus (1)
Fig.: 4-digit text display, e.g. of pressure unit in bar or psi
14 - 8624-2 Standard
4-digit text display, e.g.
of pressure unit in bar or
psi
6.3 Key allocation
Mode
Standard mode
Manual mode
Configuration
mode
Menu items
Configuration
mode
Editing menu
items
key
"INC"
"DEC"
press key:
switchover of display
between set and
actual value
press key:
open valve
(inc)
press key:
backwarts in menu
press key:
increase the selected
digit*
ENTER keykey
No function on this
model.
press key:
switchover of display
between set and actual
value
press key:
close valve
(dec)
press key:
forwards in menu
press key briefly:
to next digit
press key for 2 sec.
sets decimal point
behind the place
selected
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press key briefly:
enters manual mode
press key for 5 sec.
enters configuration
mode
press key briefly:
back to standard mode
press key:
to edit the menu item
press key:
concludes setting,
back to menu item**
* In the menu item
VALV,
setting is not digit-by-digit but in increasing
sequence within the limits 0 ... 100.
** The values set are transferred to the memory.
NOTE
The values set are only vaild for control after the configuration
mode has been left in the menu item
END
with the key.
8624-2 Standard - 15
6.4 Standard mode
In this mode, the device works after switching on the operating voltage.
The current actual value of the controlled variable is now indicated.
6.4.1 Standard mode and internal setpoint
In this mode, the setpoint is specified via the keys of the display.
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Display of actual value (bar)
Display of setpoint value (bar)
Setting internal
setpoint
Fig.: Possible display in standard mode with internal set point
16 - 8624-2 Standard
6.4.2 Standard mode and external setpoint
Here the controller receives the setpoint value via the 4 - 20 mA or 0 - 10 V signal
present on pins 2 and 3 of the 4-pole M12 plug.
Display of actual value (bar)
1
Setting external setpoint
Display of setpoint value (bar)
Fig.: Possible display in standard mode with external setpoint
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8624-2 Standard - 17
6.5 Manual mode
The manual mode can be activated from the standard mode by briefly pressing
the key.
In the manual mode there is no control: the value of correcting variable last
calculated is at first retained. By pressing the arrow keys, the correcting variable
can be increased or decreased.
Î With this key you increase the pulse-duty factor of the proportio-
nal valve, i.e. the latter opens up to a max. of 100%.
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Î With this key you reduce the pulse-duty factor of the proportional
valve.
Î Press the key in the manual mode. On release of the key, you
will return to the standard mode.
Display in manual mode
Display of actual value
Î After switching to the manual mode,
the current actual value is displayed.
Manual mode activated
Fig.: Display after switching to the manual mode
Display of the pulse-duty factor of the valve
Fig.: Display of the pulse-duty factor of the valve
NOTE
18 - 8624-2 Standard
The display
to the PWM signal set in the menu item
to a pulse-duty factor of 100 %.
0 %
As soon as the correcting variable is changed by
pressing the or key, the display switches
automatically to the value of the corecting variable. After releasing the key, the current value is
shown again.
corresponds to the minimum pulse-duty factor
VALV:
100 % corresponds
6.6 Configuration mode
In the configuration mode, the settings on the controller can be adapted to the
current application. The control process continues to run in the background with
the previously active parameters.
STANDARD
CONFIGURATION
MODE
press key for 5 sec
Fig.: Switching over from standard to configuration mode
NOTE
Values that are changed within the configuration mode only
become active when this mode is left in the menu item
pressing the key or after switching the device off and on
again.
MODE
MENU
.
.
.
END
END
press
key
by
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8624-2 Standard - 19
Key allocation in configuration mode
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Menu level
Edit menu
items
UNIT, SENS,
MODE, AMPL,
INTG, INV,
ZERO
Edit menu
item
VALV
Menu item
END
press key:
backwards in menu
press key:
increase the
selected digit or
select the
respective menu
subitem
press key:
increase the value,
e.g.
00 ... 100
press key:
forwards in menu
press key briefly:
to next digit
press key for 2
sec.:
set decimal point
behind the position
selected
press key:
decrease the value,
e.g.
100 ... 00
press key:
to edit the menu
item
press key:
conclude setting,
return to menu item
(menu level)*
press key:
conclude setting,
return to active
menu item (menu
level)*
press key:
conclude settings,
return to standard
mode **
* The values set are stored in the memory, but become active only after
leaving the configuration mode for the current control procedure.
** On leaving the configuration mode, the values currently set become valid
for the controller. The current control is continued with the new parameters!
20 - 8624-2 Standard
6.6.1 Menu of configuration mode
STANDARD
MODE
5 s
Settings
Unit of controlled variable
(see 6.6.2)
Sensor signal
(see 6.6.3)
Setpoint
(see 6.6.4)
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Fig.: Menu of the configuration mode
Amplification K
(see 6.6.5)
Reset time T
(see 6.6.6)
Control inverted/non-inverted
(see 6.6.7)
Zero point switch-off
(see 6.6.8)
Adaptation of controller
correcting variable (see 6.6.9)
Storage of the values set
(see 6.6.10)
P
N
8624-2 Standard - 21
6.6.2
UNIT
- setting the unit of the controlled variable
Î Select here the unt of the controlled
variable (factory setting: bar).
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Unit = mbar
Unit = bar
Unit = psi
Unit = litre/minute
Unit = litre/hour
Unit = m3/hour
Unit = gallons/minute
Unit = gallons/hour
no unit *
* For control systems whose controlled variable corresponds to none of the
units that can be set (e.g. with conductivity), display of the unit can be
suppressed here.
Fig.: Setting the unit of the controlled variable
22 - 8624-2 Standard
6.6.3
SENS
Î Select here whether the sensor is to send 4 - 20 mA or 0 - 10 V to the
Î Next enter the scaling. The range corresponding to the standard signal (4 -
Settings between 0.000 and 9999 are possible. The unit corresponds to the value
set in the menu item
(factory setting: S LO=0.00; S HI=10.00)
Example:
- setting the sensor input
controller for the actual value of the controlled variable (factory setting: 0 10 V).
20 mA or 0 - 10 V) is set, i.e. the pressure or flow rate or another type of
controlled variable is entered at 4 mA or 0 V (lower limit) and at 20 mA or 10
V (upper limit).
UNIT
.
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Lower limit (
Upper limit (
=> An actual value signal of 12 mA corresponds in this case to 11.25 bar
S LO
) 2,5 bar 4 mA
S HI
) 20 bar 20 mA
8624-2 Standard - 23
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Fig.: Setting the sensor input
2 s
increase digit
next digit
set decimal point
increase digit
next digit
The decimal point is set during the setting of
LO, S HI, SET, EXLO, EXHI
NOTE
If the sensor scaling is changed, then the setpoint scaling (
EXHI
) is automatically overwritten with values of the sensor
scaling. The internal setpoint (
Error messages in the menu
If the value for
S LO
flashing alternately on the text display.
In this chase the newly set values are not stored!
24 - 8624-2 Standard
S LO.
It then applies for the values
and cannot be changed within these menu items.
SET
) is set to
S LO.
SENS
S HI
or equal to it, the texts
was selected lower than that for
SENS
and
ERR9
appear
S
EXLO,
6.6.4
MODE
Fig.: Setting the setpoint mode
- setting the setpoint mode
Î Select here whether the device shall work with internal or
external setpoint. The choice
the number “1” in the lower display line.
(factory setting: external setpoint
External Setpoint
internal
setpoint
external
1
setpoint
is shown by
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Setting the setpoint: internal setpoint
With internal setpoint setting, the setpoint value for the controlled variable is
entered in the previously set unit and stored. The device controls to this value.
Settings are possible within the values of the sensor scaling(see 6.6.3)
(factory setting: 00.00).
The unit corresponds to the value set in the menu item
Fig.: Setting the setpoint: internal setpoint
UNIT
increase digit
next digit
.
8624-2 Standard - 25
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Setting the setpoint: external setpoint
For external setpoint setting you state a scaling.
The range corresponding to the standard signal (4 - 20 mA, 0 - 10 V)
must be set, i.e. the pressure or flow rate is entered at 4 mA or 0 V (lower
limit) and at 20 mA or 10 V (upper limit). Settings are possible within the
values of the sensor scaling(see 6.6.3) (factory setting: EXLO=0.00;
EXHI=10.00).
The unit corresponds to the value set in the menu item UNIT.
Example:
Lower limit (
Upper limit (
EXLO
) 2,5 bar 4 mA
EXHI)
Standard signal 4 - 20 mA
Standard signal 0 - 10 V
20 bar 20 mA
increase digit
next digit
Fig.: Setting the setpoint: external setpoint
Error messages in the menu
If the value for EXHI was selected lower than that for
EXLO
appear flashing alternately on the text display.
In this case the newly set values are not stored,
but are overwritten with the values of the sensor
scaling (S LO, S HI).
26 - 8624-2 Standard
MODE
or equal to it, the texts
MODE
and
increase digit
next digit
ERR9
6.6.5
AMPL
Î Select the amplification factor KP in a range from 0.00 to 10.00 (factory
- setting the amplification K
setting: 1.00). If it is attempted to set a higher value, the display will jump
automatically to 0 and a value must be entered within the range. For the
internal calculations, the value set for KP is referred to range set in the
menu item SENS.
p
Setting aid:
• If excessive overshoot occurs at the value of KP set or the control
becomes unstable, you should decrease KP.
• On the other hand, unsatisfactory control dynamics may be improved by
raising KP as long as the abovementioned instability does not occur.
1
increase digit
next digit
2 s set decimal point
Fig.: Setting the amplification K
p
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8624-2 Standard - 27
6.6.6
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INTG
- setting the reset time T
The reset time TN is the time that is needed to obtain the same magnitude of
change in the controller output with the I fraction as occurs with the P fraction.
Î Select the reset time TN in a range from 0.05 to 200.1 sec (works setting:
0.50). Higher values result automatically in the display 0.1 and a value
within the range must be entered.
1
2 s set decimal point
N
increase digit
next digit
Fig.: Setting the reset time T
28 - 8624-2 Standard
N
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