User manual | WEIGHING SYSTEM PD 4000 / PD 3230 Pattern - Proces-Data

502 073 01
WEIGHING SYSTEM
PD 4000 / PD 3230
Pattern approved
non-automatic
weighing system
Manual
GB
June 1994
Proces-Data Silkeborg ApS, Navervej 10, DK-8600 Silkeborg, Denmark, phone +45-86814033, fax +45-86814088
502 073 01
© Copyright 1994 by Proces-Data Silkeborg ApS. All rights reserved.
Proces-Data Silkeborg ApS reserves the right to make any changes without prior notice.
P-NET, Soft-Wiring and Process-Pascal are registered trademarks of Proces-Data Silkeborg ApS.
II/IV
Weighing System PD 4000 / PD 3230
Manual
502 073 01
Contents
page
1.
Pattern approved weighing system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
2.
System description. . . . . . . . . . .
2.1.
Display. . . . . . . . . . . . .
2.2.
Keyboard. . . . . . . . . . . .
2.3.
Real Time Clock. . . . . . .
2.4.
Memory. . . . . . . . . . . . .
2.5.
Communication interface.
2.6.
The Weight Transmitter. .
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3
3
3
3
3
3
4
3.
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
4.
Weight Display. . . . . . . . . . . . . . .
4.1.
Main functions. . . . . . . . . .
4.2.
Key functions for user input
4.3.
Menu overview. . . . . . . . . .
4.4.
Service menu. . . . . . . . . . .
5.
Error detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
6.
Calibration and protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1.
Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.
Configuration and calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
19
21
7.
Construction, Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
8.
Appendix 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.1.
Specifications of the indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
27
9.
Appendix 2 . . . . . . . . . . . . .
9.1.
Standard specifications
9.2.
Ambient Temperature.
9.3.
Humidity. . . . . . . . . .
9.4.
Approvals. . . . . . . . .
28
28
28
28
28
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.. 6
.. 7
. 10
. 12
. 13
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Enclosures
Test certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enclosure 1
Manual
Weighing System PD 4000 / PD 3230
III/IV
502 073 01
IV/IV
Weighing System PD 4000 / PD 3230
Manual
502 073 01
1.
Pattern approved weighing system.
The pattern approved weighing system is a module constructed system, following the
specifications for metrological and technical requirements for non-automatic weighing systems,
described in the European Standard EN 45501.
The weighing system consists of several self-contained weighing modules, Weight Transmitters, "PD3230 Weight Transmitter" or "PD1435 Weight Transmitter" mounted in separate
boxes and several separate indication units, "PD4000 Weight Display." The Weight Displays
may also be mounted in separate boxes. Only PD 3230 Weight Transmitter is mentioned
below, but the manual is also valid for the PD 1435 Weight Transmitter.
Up to a total of 99 Weight Transmitters and up to 32 Weight Displays may be connected in
an approved system. The total number of units must not exceed 125.
Each Weight Display is connected to the Weight Transmitters in a P-NET Fieldbus system.
The communication between the weighing modules and the indication units is performed via
the P-NET. Up to 125 master and slave units may be connected to the bus, where a unit may
be a PD3230 Weight Transmitter, a PD4000 Weight Display or another P-NET module.
In this system the Weight Transmitter serves as a slave, which converts the input signal from
the connected load cells into scaled engineering units (SI units). The display unit serves as a
master, which gather and display the data from the connected weighing modules.
A typical weighing system is shown below.
Weighing system
Manual
Weighing System PD 4000 / PD 3230
1/29
502 073 01
The pattern approval for the system concerns a non-automatic weighing system of class III/IIII,
with up to 3000 scale intervals.
On the sketch on page 1 is shown a possibility of connecting external equipment to the system.
The external equipment, which may be connected are not included in the approved system.
Connecting external equipment to the approved system makes it possible to collect data from
the weighing modules. The data are collected via P-NET. The system ensures that the data in
the Weight Transmitters and the Weight Displays are not influenced.
All weighing instruments, Weight Transmitters and Weight Displays, are marked with a weight
number. The number is used at request from the indication unit.
Example of data plate, measuring device. Scale 1:1.
Example of data plate, Weight Display. Scale 1:1.
2/29
Weighing System PD 4000 / PD 3230
Manual
502 073 01
2.
System description.
The Weight Display unit is based on a PD 4000 P-NET Controller, which is designed as a
control computing and display element. The Controller is completely sealed, and is therefore
suitable for use in any industrial environment. The compact design and the outstanding
environmental specifications for the Controller, makes it exceptional for many applications.
2.1.
Display.
The display is a fast graphics LCD, using Supertwist technology, providing wide viewing
angle. The display has a resolution of 150 by 20 pixels, enabling a variety of character fonts
and graphics to be used, e.g. 3 lines with 25 characters each. The viewing area is 120mm *
19.2mm. A LED backlight is incorporated. The display is covered by non-reflecting glass.
2.2.
Keyboard.
The keyboard is a membrane click-switch foil, with metal domes. The keyboard has 28
available keys. The unique design includes a self adhesive keyboard foil with the key functions
adapted to the Weight Display application. This ensures an ideal operator/instrumentation
interface.
2.3.
Real Time Clock.
The Weight Display is equipped with a real time clock with battery back-up. It is configured
for 24 hour format and enables the display and recording of real time, in seconds, minutes,
hours, days, months and years.
2.4.
Memory.
The program memory is a flash EPROM of 128K bytes, and a 64K bytes boot EPROM. The
data memory is CMOS RAM 128K bytes with battery back-up. The program in flash memory
in the display unit is protected against undesirable overwriting, by means of a switch. If the
switch is in position ON, writing is possible. The system configuration data are stored in
battery backed-up memory and may be protected from any modification by means of a
systemlock.
2.5.
Communication interface.
The Weight Display has a P-NET multi-master interface. P-NET is a RS-485 Serial interface
used for communicating with P-NET interface modules with a transmission speed of 76,800
baud. Data exchange between the Weight Display and the connected weighing modules is
performed via the P-NET.
Manual
Weighing System PD 4000 / PD 3230
3/29
502 073 01
2.6.
The Weight Transmitter.
The PD 3230 Weight Transmitter is a self-contained weighing module mounted in a separate
box. The Weight Transmitter must be connected directly to the load cells. As an option for
parallel connection of load cells to a Weight Transmitter, the PD810 Cable Junction Box may
be used. For further information on the junction box please refer to the Weight Transmitter
PD3230 Manual 502 063.
The weighing process is performed in the Weight Transmitter. The signal voltage from the
connected load cells is continuously measured and converted into engineering units.
The calibration of the system, zeropoint adjustment, fullscale adjustment and saving of relevant
verification data ("e," "max," "min"...) are stored in the Weight Transmitter. After sealing of
the system, none of those data can be changed. The calibration and verification data will
remain unchanged after a power failure.
The Weight Transmitter supervises the connection between the transmitter and the load cells,
and registers possible errors internal in the Weight Transmitter. The Weight Display supervises
the communication on the P-NET.
If an error occurs, an error code will be generated in the Weight Transmitter. Any reading from
the Weight Transmitter contains the actual error status. If an error code is present in the
Weight Transmitter, then an error message will be written in clear text in the bottom line of
the display, i.e., "Overload in W: 01".
Only errors occurring in the Weight Transmitter, which is currently shown in the display, will
be written on the display. If an error occurs in a Weight Transmitter, which is not currently
displayed, the error text will not be displayed until the Weight Transmitter is selected.
The PD3230 Weight Transmitter interfaces with 2mV/V load cells that follows the
specifications in the OIML R 60 recommendation.
The connected load cells are tested for overload. If the signal voltage from the load cells
exceeds the maximum value (2 mV/V), a SignalHigh alarm will be generated in the Weight
Transmitter.
The Weight Transmitter module has, besides the weight scale channel, a number of digital
input/output channels. One of the input channels are reserved for a hardware protection of the
calibrated data. The remaining digital channels can not be used in an approved non-automatic
weighing system.
4/29
Weighing System PD 4000 / PD 3230
Manual
502 073 01
3.
Installation.
The P-NET is a multi drop bus, which is connected in a physical ring. Up to 125 units can be
connected to the bus, where a unit may be a PD 3230 Weight Transmitter, a PD 4000
Controller or another P-NET interface module. The P-NET interface is galvanic isolated. The
bus cable is a twisted pair with shield, and the shield is used as a potential equalizer between
the driver/receiver circuits in the nodes connected to the bus.
A P-NET unit is connected to the bus by means of 3 terminal-connections, the A terminal, the
B terminal and the S terminal.
The connection from one unit to the next unit is performed by connecting A to A, B to B and
S to S. If the length of the cable is more than 100 m, the bus cable will have to be connected
from field device to field device, forming a physical ring.
All modules, PD3230 Weight
Transmitters and PD4000
Weight Displays must be supplied from a 24 V DC power
supply. The connection of the
power supply is shown clearly
on the modules.
Refer to the Weight Transmitter PD3230 Manual 502 063,
for connection of the load cells
to the Weight Transmitter.
Wiring diagram for PD4000/PD3230
Electrical specification for P-NET:
Bus structure: A physical ring without termination.
Medium:
Shielded twisted pair cable with minimum .22 mm² area conductors
and characteristic impedance of 100-120 ohm. For example TWINAX
IBM part No. 7362211 with 105 ±5 ohm, 51 pF/m.
Bus length:
Max 1200 m (EIA RS 485).
NOTE: You must configure the Weight Display to the right node number and number of
masters after electrical installation and calibration. See further details on page 14.
Manual
Weighing System PD 4000 / PD 3230
5/29
502 073 01
4.
Weight Display.
From the indication unit, the Weight Display, it is possible to display data from all the
weighing modules connected to the system.
The keys on the Weight Display consists of some number keys and some function keys. The
most important data from a Weight Transmitter may be selected and displayed by a single
function key.
The configuration of the system, calibration of the weighing modules and entering verification
data is performed via the SERVICE menu.
Weight Display, PD 4000
After switching on the power supply for the Weight Display, a display test is performed. The
display is filled with black and the display below will flash. The test takes approx. 15 sec.
6/29
Weighing System PD 4000 / PD 3230
Manual
502 073 01
4.1.
Main functions.
The main data from a Weight Transmitter data are Gross weight, Net weight and Tare. These
data may be selected and displayed by a single function key.
Pressing the "<W" or "W>" keys lead to displaying data from the preceding or the subsequent
of the connected weighing modules.
It is possible to alternate between two weight indications: Gross weight. and NET weight.
Gross weight always shows the actual load on the load cell, while NET weight has a
possibility of tare.
WEIGHT
Pressing the W key will display the current NET weight or Gross weight. The N/G key
alternates between displaying of Gross weight and NET weight.
The selected weight number is shown in the upper left corner of the display.
If the displayed weight value is below the MIN value, but different from zero ( (W < -0,5e)
or (0,5e < W < Min) ), then the text Min flashes on the bottom line of the weighing
instrument.
If the displayed weight is zero (-0,25e < W < 0,25e), then a zeroindication is displayed after
the NET/Gross indication as shown below.
If several weighing modules are connected in the weighing system, a specific weighing module
may be selected by keying in the weight number and the pressing the W key. The weight
number must be in the range from 1 to 99.
If the selected weight number is out of range, the following text will appear in the bottom line:
"W xxx invalid", where xxx is the keyed in number.
Manual
Weighing System PD 4000 / PD 3230
7/29
502 073 01
If the selected weight number is not installed in the weighing system configuration, the
following text will appear in the bottom line: "W xxx not found in system", where xxx is the
keyed in number.
Preceding WEIGHT
Pressing the "<W" key selects the Weight Transmitter with the nearest, lower weight number
to be shown in the display. Only the Weight Transmitters which are included in the approved
system can be displayed.
Subsequent WEIGHT
Pressing the "W>" key selects the Weight Transmitter with the nearest, higher weight number
to be shown in the display. Only the Weight Transmitters which are included in the approved
system can be displayed.
NET / Gross WEIGHT
Pressing this key alternates displaying of Gross weight or NET weight.
TARE
The selected Weight Transmitter may be tared by pressing the T key. It is only possible to
perform a tare on the weight reading if NET weight is shown in the display.
8/29
Weighing System PD 4000 / PD 3230
Manual
502 073 01
Tare of the NET weight is made internally in the display unit. When making a Tare, the old
tare value is overwritten. The weight system must be in equilibrium for at least 5 seconds
before it is possible to perform a tare.
A T is displayed for 0.5 sec. when a tare is performed. The T is displayed after the NET
indication as shown above.
TARE VALUE
When pressing the "T VALUE" key, the current tare value will be displayed for the selected
Weight Transmitter.
The tare value may be cleared by holding the "T VALUE" key and following press the "C"
key.
#
While pressing the "#" key, the NET weight or the Gross weight will be shown with an extra
digit (a scale interval smaller than e). The unit for weight is not shown in this menu.
C
The "C" key is a key with various function, depending on the screen or menu in which it is
activated.
The tare value may be cleared by holding the "T VALUE" key and following press the "C"
key.
If the "C" key is pressed in the SERVICE menu, the previous menu is selected.
Manual
Weighing System PD 4000 / PD 3230
9/29
502 073 01
4.2.
Key functions for user input
Some of the keys are standard function keys, which are used when entering data in connection
with configuration and calibration. The number keys, the sign key and the comma key are all
standard keys. The remaining standard keys are explained in the following.
CLEAR ENTER.
The "CE" key is used to clear any user input value entered by means of the number keys.
Pressing the "CE" key before the "ENTER" key will clear the input-data and display the
previous data.
ENTER.
The "ENTER" key is used for entering user input-data to the Weight Display or the selected
Weight Transmitter. The "ENTER" key is also used to select a sub-menu by first placing the
cursor in the square field after the menu name and then press the ENTER key.
In some sub-menus in the SERVICE section it is possible to scroll between various
configuration parameters by means of the "arrow up" and "arrow down" keys. The "ENTER"
key is used to select the displayed configuration parameter.
Arrow Up
The "arrow up" key is only used in the SERVICE menus.
The "arrow up" key is a key with various function, depending on the sub-menu in the
SERVICE section.
In some sub-menus it is possible to scroll between various configuration parameters.
This is written on the display. The "ENTER" key is used to select the displayed
configuration parameter.
In other menus the "arrow up" key is used to move the cursor one line upwards. If the
cursor is at the top line, the cursor will swap around and continue from the bottom
line.
10/29
Weighing System PD 4000 / PD 3230
Manual
502 073 01
Arrow Down
The "arrow down" key is only used in the SERVICE menus.
The "arrow down" key is a key with various function, depending on the sub-menu in the
SERVICE section.
In some sub-menus it is possible to scroll between various configuration parameters.
This is written on the display. The "ENTER" key is used to select the displayed
configuration parameter.
In other menus the "arrow down" key is used to move the cursor one line downwards.
If the cursor is at the bottom line, the cursor will swap around and continue from the
top line.
CURSOR left, CURSOR right.
The cursor keys are only used in the SERVICE menus.
The cursor keys are used on the menus to move the cursor in the left direction and in the right
direction. When the cursor is moved left and reaches the edge of the screen, the cursor will
swap around and continue from the right side one line up. When the cursor is moved right and
reaches the edge of the screen, the cursor will swap around and continue from the left side one
line down.
The cursor will only be visible when it is possible to select a menu or to enter data.
Manual
Weighing System PD 4000 / PD 3230
11/29
502 073 01
4.3.
Menu overview.
The figure below gives a schematic view of the available menus on the Weight Display.
12/29
Weighing System PD 4000 / PD 3230
Manual
502 073 01
4.4.
Service menu.
Configuration and calibration of a Weight Transmitter and setting the time and date in the
Weight Display is made in the ’SERVICE’ menu. The ’SERVICE’ menu holds a number of
sub-menus, which may guide you through the setup.
The different displays are either selected directly by a single function key, or by selecting a
main function and then pointing out various sub-menus.
The SERVICE sub-menu holds a number of sub-menus. When selecting a sub-menu, the cursor
must be placed in the square field after the menu name and then the ENTER key must be
pressed.
To enter new data during calibration, eg. a new ’e’ value, the following must be done:
1
2
3
Place the cursor in the data field,
Key-in the data,
Press the ENTER key.
When keying in the new data, these input-data will be placed aligned left in the data field and
the remaining part of the data field will be filled out with "*".
Pressing the "CE" key before the "ENTER" key will clear the input-data and display the
previous data.
If the input-data are not entered by means of the ENTER key within 15 seconds, then these
input-data are cleared and the previous data are displayed again.
To select between different configuration parameters, use the "arrow up" "arrow down" keys
to scroll through the possibilities and press the ENTER key to select the displayed value.
At configuration of the weighing system, the coherent weight-, node- and serial number of all
the connected weighing modules are stored in the display unit. This precaution protects the
system against illegal modifications.
SERVICE
In the SERVICE menu it is possible to configure the connected weighing instruments and the
display unit, to adjust the built-in real time clock and to calibrate the Weight Transmitters.
Manual
Weighing System PD 4000 / PD 3230
13/29
502 073 01
4.4.1. Sub-menu SYSTEMSETUP
P-NET communication parameters, the configuration list of connected weighing modules, the
verified data parameters and the systemlock are all set through the ’SYSTEM SETUP MENU’.
The ’SYSTEM SETUP MENU’ is shown below.
COMMUNIC.
In this menu it is possible to set the node number of the display unit and the number of
masters which may be connected to the system.
The Weight Display operates as a master in the P-NET communication system. Therefore it
is important that the rules for node numbers and number of masters are respected. That is, all
units in a P-NET ring must have a unique node number and the value for "number of masters"
must be equal in all the masters. If the Weight Display is connected to systems with existing
masters then the Weight Display must be assigned an unused node number which was reserved
for a master.
Example:
If a system exists with 2 masters with node number 2 and 4, and the value for "number
of masters" is 5, then the Weight Display may get one of the node number 1, 3 or 5
and NoOfMaster (value for "number of masters") must be set to 5.
If no master node number is free for the Weight Display, then the other masters must increase
their value for "number of masters", otherwise communication errors will occur.
After a master reset (see page 21) of the Weight Display, the node number is set to 127
(factory setting). This value is only used for test purposes and therefore it must be changed to
the actual application. NoOfMaster, which is the value for "number of masters" is set to 0
(factory setting), which means that the Weight Display is NOT connected to the system as a
master and consequently it is not able to read any values from the weighing modules.
Consequently, NodeNo and NoOfMaster must be changed to match the actual application as
described above.
SYSTEM
This menu shows the system configuration, which holds the node numbers and the
corresponding serial numbers for the weighing modules which are connected to the system.
14/29
Weighing System PD 4000 / PD 3230
Manual
502 073 01
The keys <W and W> may be used to scroll through the configuration list. If the systemlock
is ON, only the connected Weight Transmitter are listed when scrolling. If the systemlock is
OFF, scrolling is performed for the entire configuration list. The connected weighing modules
are shown with node no. and serial number.
PARAMETER
The verified data "Max", "Min" and "e" are set from this menu. The values are stored in the
weighing transmitter and may be read from all connected display units. If the actual Weight
Transmitter is sealed, then calibration will not be possible. A sub-menu is used to select the
mass unit, "t", "kg" or "g".
Max
This is the maximum weighing capacity, not taking into account the additive
tare capacity (Dmax).
Min
Load values below this value are not approved and may be subject to an
excessive relative error.
e
This is the verification scale interval. The value is expressed in units of mass
and is the difference between two consecutive indicated values on the Weight
Display.
UNIT
SYST. LOCK
In this menu it is possible to set the systemlock. The systemlock protects the system
configuration data.
NOTE:
Manual
Once the systemlock has been set, it can only be cleared by performing a
master reset of the Weight Display (see page 21).
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502 073 01
4.4.2. Sub-menu SET CLOCK
The Real Time Clock and the date stored in the Weight Display may be displayed and set in
this menu.
4.4.3. Sub-menu CALIBRATION
In this menu a complete calibration of the weighing instruments can be made. If the actual
Weight Transmitter is sealed, calibration will be impossible.
Please refer to page 19 for further details on the calibration procedure.
4.4.4. Sub-menu MANUAL
From the MANUAL menu it is possible to make a complete configuration of a connected
Weight Transmitter. The data in these menus can not be modified when the Weight Transmitter
is sealed.
The Weight Configuration Menu holds a number of sub-menus for setting additional functions
in the Weight Transmitter. Please refer to the Weight Transmitter manual, 502 063.
The Weight Setup Menu shows a list of the parameters, which may be configured via the
Weight Display.
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Weighing System PD 4000 / PD 3230
Manual
502 073 01
5.
Error detection.
The system includes a comprehensive error detector and alarm function.
The Weight Transmitter supervises the connection between the transmitter and the load cells
and registrates possible errors internally in the Weight Transmitter. If an error occurs, then an
error code is generated in the Weight Transmitter. Any reading from the Weight Transmitter
contains the actual error status. If an error code is present in the Weight Transmitter, it will
result in an error message written in clear text in the bottom line of the display.
The displayed errors which can occur in the Weighing System are (xx is the weight number):
Errors generated in the weighing module:
’ModuleError in W: xx’
General error in the weight module ( eg. EEPROM error ).
’SignalHigh in W: xx’
If the signal from the loadcells exceeds the maximum signal value.
’SignalLow in W: xx’
If the signal from the loadcells falls below the minimum signal value.
’HighAlarm in W: xx’
If the GROSS-value exceeds the keyed-in value for HighLevel and and the error
generation is enabled.
’LowAlarm in W: xx’
If GROSS-value is less than the keyed-in value for LowLevel and and the error
generation is enabled.
’InternError in W: xx’
Error inside the module (repair necessary).
’ExternError in W: xx’
Fault in load-cells or the connections between weighing module and load cells detected
(check connections).
’Overload in W:
xx’
Fault in load-cells or the connections between weighing module and load cells detected
(check connections).
’Unexpected ModuleErr.: xx’
This error is generated when an unexpected error is seen. This error should not occur
in this application.
Manual
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502 073 01
Errors referring to the displayed weight value generated in the Weight Display:
’MINLOAD ALARM W:
xx’
If the GROSS-value is 9*e below zero.
’MAXLOAD ALARM W:
xx’
If the GROSS-value exceeds Max with more than 9*e.
’OVERLOAD ALARM W: xx’
IF the GROSS-value plus Zeropoint exceeds FullScale with more than 9*e.
The Weight Display supervises the P-NET connection between the Weight Display and the
Weight Transmitter.
’Transmission Error:
zzzz’
Registration of possible transmission errors result in this error text followed by a four
digit code describing the type of error.
If more errors occur at the same time for one Weight Transmitter, only the error with the
highest error code will be displayed. Communication errors have the highest priority.
For further explanation of the listed errors, please refer to the Weight Transmitter PD 3230
manual (502 063).
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Weighing System PD 4000 / PD 3230
Manual
502 073 01
6.
Calibration and protection.
The approved system must be protected against dismantling and calibration by the user.
6.1.
Protection.
On the Weight Transmitter, a wire must always be connected between pin 8 on connecter J1
and pin 1 on connector J2.
To be able to calibrate and configure the Weight Transmitter, an external 24V DC voltage must
be connected to the transmitter, see page 22. After the calibration, the external voltage must
be disconnected, and the Weight Transmitter will be protected.
To be able to secure the
Weight transmitter against recalibration and dismantling, it
must be mounted in a box
which can be sealed. To recalibrate the Weight transmitter, the sealing must be broken.
The display unit is composed of two parts, one part containing the display and keyboard and
one part containing a power interface. The ON/OFF switch is placed on the inside of the power
interface. To be able to set the switch ON, the two parts must be separated which will perform
a master reset of the display unit.
To protect the program in the Weight Display against undesirable writing and modification,
the display unit is supplied with a ON/OFF switch. If the switch is in position OFF writing is
impossible.
The system configuration is protected by means of a systemlock. The systemlock can be set
in the SERVICE menu, and can only be reset by performing a master reset for the Weight
Display.
Manual
Weighing System PD 4000 / PD 3230
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502 073 01
The Weight Display must be protected against dismantling, the program and the system
configuration must be secured from being modified by the user.
For this protection, the Weight
Display may be mounted in a
box which can be sealed.
The Weight Display may alternatively be sealed directly with a wire, a metal band covering
the screw terminals and the plug, and a lead seal, see the drawing below. To disconnect the
cables or the plug, the sealing must be broken. In this case, the box in which the Weight
Display is mounted is not sealed.
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Weighing System PD 4000 / PD 3230
Manual
502 073 01
6.1.1. Master reset
A master reset for the Weight Display is performed by separating the power supply unit from
the display/keyboard unit. The power supply unit is the little squared box on the back of the
controller. The 4 screws must be removed before the units can be separated. The power supply
unit must be dismounted for at least 15 seconds before mounting again.
NOTE: the power supply must be switched OFF before the units are separated.
When the power supply is switched on after a master reset, the following text will appear on
the display.
The Weight Display program is stored in flash memory and the W key must be pressed to
select this program. Any other key will select a demo-program. If, by accident, the demoprogram is selected, then another master reset must be performed.
After selecting the Weight Display program by pressing the the W key, the following text will
be displayed.
Reset the Weight Display by switching off the power supply. When power is switched on
again, the test display will appear and the Weight Display is ready for configuration and
calibration.
6.2.
Configuration and calibration.
The configuration and calibration of a weighing module is done in the following steps:
Open the hardware lock by connecting a 24 V DC power supply between pin 5 and pin
7 on connector J1. The plus pole must be connected to pin 5, see the figure on page
22.
Perform the configuration and the calibration of the Weight Transmitter, see page 22.
Disconnect the 24 V DC power supply.
The Weight Transmitter is now calibrated and protected against any writing in the EEPROM
registers and may be sealed.
Manual
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502 073 01
Connection of the 24 V DC power supply
6.2.1. Adding a weighing module to the system.
The procedure described below should be followed when adding a new weighing module:
NOTE:
If the systemlock is on, a master reset must be performed before adding a new
Weight Transmitter (see page 21, Master reset). Remember to set the NodeNo
and NoOfMaster.
The system configuration includes a definition of the weighing modules which are verified and
following may be viewed on the indication unit, when the system is calibrated, sealed and
verified.
1
First select ’WEIGHT SERVICE MENU’ by pressing "SERVICE"-key.
2
Then select ’SYSTEMSETUP’, followed by selecting ’SYSTEM’.
Now ’SYSTEM CONFIG MENU’ is displayed.
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Weighing System PD 4000 / PD 3230
Manual
502 073 01
3
Select the desired weight number, using "W>"- and "W<"-keys. Now key in the
’NodeNo:’. The ’NodeNo’ must be a unique number for each Weight Transmitter in
the range from ’NoOfMaster’ for the Weight Display to 125.
The serialnumber for the new Weight Transmitter must now be keyed in.
If any Weight Transmitter has this ’NodeNo’ already, then the serial-number (
’SerNo:’) for this Weight Transmitter will be displayed and a new weight number
should be selected for the Weight Transmitter to insert in the configuration.
When a serial number has been keyed in, the bottom line will no longer display ’Key
in Serialnumber’. Now the weighing module is installed in the system configuration.
This procedure must be followed for all weighing modules in the system.
4
All weighing modules with a ’NodeNo’ may now be displayed. If you are quite sure
that all weighing modules now are in the system-configuration, the system configuration may be protected by a systemlock, ’SYST.LOCK’. The systemlock can be
selected from ’SYSTEM SETUP MENU’ and the ’SYSTEMLOCK’ may be set.
Be aware that after this ’SYSTEMLOCK’ is set, it is not possible to make changes in
the system configuration. The ’SYSTEMLOCK’ may only be released by a master
reset. A master reset will clear the system configuration.
5
Now each weighing module has to be configured and calibrated.
First set up fullscale and zeropoint. Select ’CALIBRATION’ from ’WEIGHT
SERVICE MENU’.
Manual
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502 073 01
The relation between the calibration parameters is shown below.
Calibration parameters.
6a
Now ’Scale:’ and ’Zero:’ can be keyed in separately, if the fullscale and zeropoint for
the selected weighing module is known.
FullScale can be calculated from the following information about the weighing system:
A: Number of load cells [ ]
B: Maximum load per load cell [kg]
C: Weight Transmitter sensitivity: 2 [mV/V]
D: Load cell sensitivity [mV/V]
Calculation of FullScale:
FullScale = A * B * (C / D)
Example: FullScale = 6 cells * 100kg/cell * 2mV/V / 2mV/V = 600kg
6b
The Weight Transmitter utilizes automatic calculation of fullscale and zeropoint during
calibration. The FullScale value will be calculated automatically if the known weight
of a calibrated load at the load cell is written in NetWeight. To ensure accuracy, the
calibration load must be a reasonable fraction of the maximum load.
First make sure that ’Scale:’ is larger than or equal to 1.0.
Key in 0 in ’NetWeight:’ with only the dead-load on the load cell.
Then place a load on the weight scale, and key in the mass of the load in
’NetWeight:’.
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Weighing System PD 4000 / PD 3230
Manual
502 073 01
Repeat the procedure for more accurate calculation of both ’Scale:’ and ’Zero:’. Since
the automatic calculation of FullScale and ZeroPoint is based on the averaged weight
input, the functions should not be repeated with short time intervals. The averaging
function needs at least SampleTime * NoOfSamples [s] (see description of ChConfig
in the PD 3230 Weight Transmitter manual, 502 063) to stabilize with a new FullScale
or ZeroPoint value.
This setup of fullscale and zeropoint must be performed for all Weight Transmitters.
7
If you want other features in addition to the standard settings, you may now select
’MANUAL’ from ’WEIGHT SERVICE MENU’, followed by ’CONFIG:’.
From this menu other menus may be selected, and different data in the weighing
modules may be set up. Please refer to the PD3230 manual (502 063) for further
information.
8
Finally select ’SYSTEMSETUP’ followed by ’PARAMETER’.
Now ’Max:’, ’Min:’, ’e:’ and weight unit may be entered. Select ’W Unit:’ for
selecting the mass unit ’t’, ’kg’ or g .
When these data are entered, the main weight indication on the Weight Display must be
selected by means of the "W" key.
Now the weighing module is ready to be sealed.
REMARK: Before sealing the weighing module or disconnecting the power, press the "W"
key and wait for 20 seconds. The Weight Transmitter is calculating internal memory-data after
calibration. These data are used to detect memory-failures during operation and measuring.
Manual
Weighing System PD 4000 / PD 3230
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502 073 01
7.
Construction, Mechanical.
The PD4000 Controller is manufactured in a black injection moulded plastic enclosure. The
entire Controller is completely filled with silicone. This construction makes it extremely
resistant to water, dust and vibrations.
The case measures W x H x D = 144.0 x 127.0 x 52.5 mm (tolerance to DIN 16901 ).
The module is designed for panel mounting. The module incorporates one snap connector,
which provide the terminals for power and communications.
The module may be removed for service, without interfering with operational activities on the
rest of the network.
Scale drawing (in mm):
Materials
Case
Front foil
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: Black NORYL GFN
( injection moulded )
: Polycarbonate.
Weighing System PD 4000 / PD 3230
Manual
502 073 01
8.
Appendix 1
The specifications for a weight indicator, which consists of a PD 4000 Weight Display and a
PD 3230 Weight Transmitter are listed below. The data are valid for a weight indicator in a
pattern approved weighing system.
8.1.
Specifications of the indicator
Applicant
:
Manufacturer
Type
Class
The fraction Pi
Maximum number of scale intervals
Excitation voltage (AC and/or DC)
Maximum measuring range
Minimum dead load voltage
Maximum dead load voltage
Mimimum signal voltage
per verification scale interval
Max. influence of the temperature on
the no load indication
Max. influence of the temperature on
the sensitivity
Sensitivity
Minimal load cell impedance
Maximal load cell impedance
Min. and max. temperature
Power voltage
Minimum battery voltage
Frequency
The fraction Pi (power)
Remote sensing in the indicator
Is it possible to install a high
resolution (description)
Specifications of the load cell
connection cable
type
length
cable shield
impedance
:
:
:
:
:
:
:
:
:
PROCES-DATA SILKEBORG APS,
Navervej 10, DK-8600 Silkeborg.
Same.
Weighing System PD 4000 / PD 3230
III.
0.5.
3.000.
5 V Alternating DC.
11 mV.
- mV.
- mV.
:
0.5 µV
:
+/- 1 ppm/K
:
:
:
:
:
:
:
:
:
:
+/- 7 ppm/K
2 mV/V
60 Ω
1.000 Ω
Min. -10°C. ...... Max. +40°C
24 V DC +/- 4 V.
DC
Yes.
:
-
:
:
:
:
3 x twisted pair.
Max. 50 m.
Yes.
50 - 150 Ω.
Manual
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502 073 01
9.
Appendix 2.
9.1.
Standard specifications.
The standard specifications for a PD 4000 Weight Display and a PD 3230 Weight Transmitter
are listed below.
All electrical characteristics are valid at an ambient temperature from -25 °C to +70 °C.
All specifications are respected in the approved EMI conditions.
EMC test specifications for PD 4000 are available in a separate document, PD no. 506 022.
EMC test specifications for PD 3230 are available in a separate document, PD no. 506 020.
9.2.
9.3.
Ambient Temperature.
Operating temperature :
(with reduced scale interval)
-25 °C .. +70 °C
Storage temperature :
-40 °C .. +85 °C
Humidity.
Relative humidity :
9.4.
max.
Approvals.
Compliance with EMC-directive no.:
89/336/ECC
Generic standards for emission:
Residental, commercial and light industry
Industry
EN 50081-1
PrEN 50081-2
Generic standards for immunity:
Residental, commercial and light industry
Industry
EN 50082-1
PrEN 50082-2
Vibration (sinusoidal):
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95 %
Weighing System PD 4000 / PD 3230
IEC 68-2-6 Test Fc
Manual
502 073 01
Index
<W key 8
# key 9
Adding a weighing module 22
Approvals 28
Arrow Down key 11
Arrow Up key 10
C key 9
Cable Junction Box 4
CALIBRATION 16, 21, 23
Calibration parameters 24
CE key 10
Clear 10
COMMUNIC 14
Communication errors 18
Communication interface 3
Communication parameters 14
Configuration 16, 21
Configuration list 14
Construction, Mechanical 26
Cursor 10, 11
CURSOR left 11
CURSOR right 11
Data plate 2
Digital input/output channels 4
Display 3, 6
Display test 6
e 15, 25
ENTER key 10
Enter new data 13
Equilibrium 9
Error detection 17
Error message 17
External equipment 2
Extra digit 9
Fullscale 23, 24
Gross weight 7
Hardware lock 21
Hardware protection 4
Humidity 28
Installation 5
Keyboard 3
Lead seal 20
Load cells 4, 24
Main functions 7
MANUAL 16
Mass unit 15, 25
Master reset 14, 19, 21
Max 15, 25
Manual
Menu overview 12
Min 15, 25
MIN value 7
NET / Gross WEIGHT 8
NET weight 7
Node number 14
Number of masters 14
P-NET 1, 3, 5, 14
PARAMETER 15, 25
Preceding WEIGHT 8
Previous menu 9
Protection 19
Sealing 20
Serialnumber 23
Service menu 13
SET CLOCK 16
Specification for P-NET 5
Specifications of the indicator 27
Standard specifications 28
Subsequent WEIGHT 8
SYSTEM 14
System configuration 14
SYSTEM SETUP menu 14
Systemlock 15, 19, 23
SYSTEMSETUP 25
T key 8
T VALUE key 9
Tare 8
Tare value 9
Temperature 28
UNIT 15
User input 10
Verified data 14, 15
W key 7
W> key 8
Weight Configuration Menu 16
Weight number 7
Weight Setup Menu 16
Weight Transmitter 4
Weight Transmitter interface 4
Zeroindication 7
Zeropoint 23, 24
Weighing System PD 4000 / PD 3230
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