HBM PW15AHi User manual

A2526-4.0 en/de/fr
Digital load cell
Digitale Wägezelle
Peson numérique
PW15AHi
Mounting Instructions
Montageanleitung
Notice de montage

English Page 3 024................................................
Deutsch Seite 25 046..............................................
Français Page 47 068..............................................

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PW15AHi
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Contents Page
English
Safety instructions 4..............................................
1 Application 6..................................................
2 Special features 7..............................................
3 Marking and variants 7.........................................
4 Mechanical construction and mounting instructions 8............
4.1 Design of the PW15AHi 8..................................
4.2 Before start‐up 8..........................................
4.3 Mounting instructions 9.....................................
5 Electrical configuration and function 10..........................
5.1 Function 10................................................
5.2 Signal conditioning 11.......................................
5.3 Trigger functions 12.........................................
5.4 Limit value function 13......................................
5.5 Extreme value function 13...................................
5.6 Dosing and filling control 13..................................
5.7 Diagnostic function 14.......................................
6 Electrical connection 15.........................................
6.1 PW15AHi pin assignments 15................................
6.2 Supply voltage 16..........................................
7 Interfaces 18...................................................
7.1 RS‐485 4-wire interfaces (UART) 18..........................
7.2 CANopen interface 19.......................................
7.3 DeviceNet interface 20......................................
7.4 Digital control input 22.......................................
8 Specifications 23...............................................

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Safety instructions
The device must not be modified from the design or safety engineering point of
view except with our express agreement. Any modification shall exclude all
liability on our part for any damage resulting therefrom.
Repair is specifically forbidden. Repairs may only be carried out by HBM.
All the factory defaults are stored at the factory so that they are safe from
power failure and cannot be deleted or overwritten. They can be reset at any
time by using the command TDD0.
The production number set at the factory cannot be changed.
PW15AHi load cells are exclusively designed for weighing technology
measurement tasks and directly associated control and regulatory tasks.
Use for any purpose other than the above is deemed to be non-designated
use.
There are not normally any hazards associated with this product, provided
the notes and instructions for project planning, installation, appropriate
operation and maintenance are observed.
It is essential to comply with the safety and accident prevention regulations
specific to the particular application.
Installation and start‐up must only be carried out by suitably qualified
personnel.
During installation and when connecting the cables, take action to prevent
electrostatic discharge, as this may damage the electronics.
The required power supply is a (12 - 30 V) extra‐low voltage with safety
separation from the mains (see Specifications).
When connecting additional devices, comply with the safety requirements.
All the interconnecting cables must be shielded cables. The shield must be
connected extensively to ground on both sides.
For additional information, please refer to the Online Help on 1‐FIT‐AED‐DOC
(system CD).

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Residual dangers are indicated in these mounting instructions by the following
symbols:
Symbol: ATTENTION
Meaning: Possibly dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements could result in damage to property or some form of phys
ical injury.
Symbols for application instructions and useful information:
Symbol: NOTE
Means that important information about the product or its handling is being
provided.
Symbol:
Meaning: CE mark
The CE mark enables the manufacturer to guarantee that the product complies
with the requirements of the relevant EC directives (the Declaration of
Conformity can be found at http://www.hbm.com/HBMdoc).
Symbol:
Meaning: Statutory waste disposal mark
In accordance with national and local environmental protection and material
recovery and recycling regulations, old devices that can no longer be used
must be disposed of separately and not with normal household garbage.
If you need more information about waste disposal, please contact your local
authorities or the dealer from whom you purchased the product.

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1 Application
PW15AHi load cells belong to the digital load cell and measuring chain family
specially developed by HBM for rapid dynamic weighing processes. They
acquire measurement signals from strain gages, condition them digitally, output
them and can network them for buses on request.
They supply a fully‐filtered, scaled and digitized output signal for direct
connection to a bus system or a PC. They operate at high data rates of up to
1200 measurements per second and can be easily and rapidly adapted to the
actual weighing system by means of adjustable parameters.
The integrated trigger function allows event‐driven determination of weight,
which greatly reduces the external software requirements for checkweigher
applications, for example.
The PW15AHi includes dosing control. As this load cell does not have any
digital outputs, the external Master control must make digital I/Os available.
The PW15AHi generates the information to control these digital outputs in the
respective measurement statuses (MSV measurement status). The Master
control then only needs to forward these control bits to its digital outputs to
drive the dosing control valves.
The load cell is supplied as required with an RS485, CANopen or DeviceNet
interface.
PW15AHi load cells are designed in stainless steel and have a high degree of
protection (IP 68).
The AED_Panel 32 PC software is available to facilitate parameter settings, to
display dynamic measurement signals and for comprehensive frequency
analysis of the dynamic system.
This part of the operating manual describes the hardware and the functions of
PW15AHi digital load cells. The commands for serial communication are
described in the online documentation (= AD103C commands).

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2 Special features
Rapid digital filtering and scaling of the measurement signal
Serial interfaces: RS‐485 4‐wire, CANopen, DeviceNet
All settings made via the serial interface
Power failsafe parameter storage
Indestructible storage of factory settings
Selection of output speed of measured values up to 1200 measured values/s
Four limit value functions
Extreme value functions (MIN/MAX)
Four trigger functions (internal level triggering, external triggering)
Dosing control
Diagnostic functions
Supply voltage 12 V ... 30 VDC
Degree of protection: IP 68
3 Marking and variants
The PW15AHi can be delivered with three different interface types.
The accuracy class is C3 (OIML).
Maximum capacity: 10 kg, 20 kg
Interface: B = RS‐485, C = CANopen, D = DeviceNet
PW15AHi product family (3rd generation)
Electrical connection: 0 = socket
Fig. 3.1 PW15AHi order reference, explanations: RS‐485 = RS‐485 4‐wire bus
The following preferred types are defined (other variants on request):
Interfaces
Max. capacity RS-485 CANopen DeviceNet
10 kg 1‐PW15AHi/3B0/10kg 1‐PW15AHi/3C0/10kg 1‐PW15AHi/3D0/10kg
20 kg 1‐PW15AHi/3B0/20kg 1‐PW15AHi/3C0/20kg 1‐PW15AHi/3D0/20kg
50 kg 1‐PW15AHi/3B0/50kg 1‐PW15AHi/3C0/50kg 1‐PW15AHi/3D0/50kg

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4 Mechanical construction and mounting instructions
4.1 Design of the PW15AHi
PW15AHi digital load cells are characterized by a compact stainless steel
measuring body and are designed with degree of protection IP68. The
electronics are integrated in the measuring body.
== ==
25 27
6M6
10
12
18
190.2
150
15
12
6
M6x0.5 (1x)
12
12
40
12.5
M6 (5x)
190.2 190.2
20
Fig. 4.1 PW15AHi dimensions
4.2 Before start‐up
Take the following precautions into account during mounting and
operation:
The length of the fastening screws must be selected so that the maximum
screw‐in length of 10 mm is not exceeded. Non‐compliance can cause
damage to the load cell.
Avoid force shunts during setup.

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4.3 Mounting instructions
1: PW15AHi mounting at load application: 2 x M6; property class 10.9;
tightening torque 10 Nm; max. screw‐in depth 10 mm.
recommended flatness 0.1 mm on the connecting plate
2: PW15AHi mounting with mounting base: 2 x M6; property class 10.9:
tightening torque 10 Nm; max. screw‐in depth 10 mm
Mounting base
Recommended
flatness: 0.1
Platform center
Load direction
Platform
Load
application
(customer
design)
(1)
(2)
Fig. 4.2 PW15AHi mounting instructions
The PW15AHi load cell must be mounted on a clean surface with a flatness
better than 0.1 mm. Overload protection can be integrated in the form of a
M6x0.5 fine‐thread screw.
It is recommended that the load is applied in the center of the platform, to
minimize off‐center load errors and moments.
Before installing several PW15AHi into an installation with a bus system, take
the following into account:
The printed production number (typeplate) is required for setting up data
communication. If the typeplate can no longer be seen after installation, the
numbers of each PW15AHi should be noted beforehand. This enables different
addresses to be assigned during the initial start‐up.
Alternatively, before connection to the bus system, you can connect each
PW15AHi individually with a PC, in order to set different addresses (see ADR
command, Online Help).

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5 Electrical configuration and function
The electronics of the PW15AHi digital load cell basically comprise the
following function groups:
Single‐point load cell
Amplifier
Analog/digital converter (A/D)
Evaluation unit (P)
Power failsafe parameter storage (EEPROM)
Serial interface (RS‐485, CANopen or DeviceNet)
Control input IN1 (Trigger/Stop Dosing)
5.1 Function
Interface
Supply voltage
UB / GND
Serial
interface
IN 1
Trigger
Stop Dosing
EEPROM
Linearization
Serial number
Digital filter
Data rate
Sensitivity
Zero setting
Voltage
controller
Trigger
Voltage
controller
Fig. 5.1 Block diagram
The analog transducer signal is first amplified, then filtered and converted to a
digital value in the analog/digital converter. The digitized signal is conditioned
in the microprocessor and forwarded via the serial interface. All the parameters
can be stored power failsafe in the EEPROM.

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The PW15AHi load cell is adjusted at the factory with zero load and maximum
capacity. The electronics determine a factory characteristic curve from these
measured values and use this characteristic curve to map the subsequent
measured values. Depending on the output format (COF), the following
measured values are returned:
Output format Input signal Meas. values at
NOV = 0 Meas. values for NOV > 0
Binary, 2 chars. (integer) 0...Max. capacity 0 ... 20 000 digits 0 ... NOV
Binary 4 chars. (long integer) 0...Max. capacity 0 ... 5,120,000 digits 0 ... NOV
ASCII 0...Max. capacity 0 ... 1,000,000 digits1) 0 ... NOV
1) Condition at the time of delivery
The two parameters LDW and LWT give you the opportunity to adapt the char
acteristic curve to meet your requirements (scale curve) and you can use the
NOV command to standardize the measured values to the required scaling
value (e. g. 3000 d). For more detailed information, see the Online Help.
5.2 Signal conditioning
Meas.
bridge
Ampli
fier Filter Data
rate
Working
standard
calibr.
Can be
scaled
by user
Lineari-
zation
Dosing control
Status:
Coarse flow
Fine flow
Finished
Alarm
Net
MIN/
MAX
TRG
Limit
values
Gross
measured
value
MSV?
Net
measured
value
Extreme
values
Trigger /
Stop
Fig. 5.2 Signal flow diagram
After amplification and A/D conversion, the signal is filtered by adjustable
digital filters.
The commands ASF, FMD are used to set the cut‐off frequency of the digital
filter. The command ICR is used to change the output rate (measured values
per second).

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Users can set their own characteristic curve (commands LDW, LWT, NOV)
without changing the working standard calibration. Gross/net selection is also
available (TAS command). Command ZSE can be used to activate an
automatic zero on start‐up function. There is also an automatic zero tracking
function (ZTR) available.
Command LIC is available for linearization of the scale curve (with a third order
polynomial). The polynomial parameters can be set using the HBM PC
program, AED_Panel32.
The current measured value is read out using the MSV? command. The format
of the measured value (ASCII or binary) is set with the COF command. You
can also use the COF command to select automatic measurement output.
Different types of digital filter are implemented in the PW15AHi, and these are
selected with the FMD command. With FMD0, filters are also available below
the 1 Hz limit frequency. In filter mode FMD1, fast‐settling filters with high
attenuation in the stopband are activated. For more detailed information, see
the Online Help.
5.3 Trigger functions
The PW15AHi includes four trigger functions to support measurements in
packaging machinery and checkweighers:
Internal pre‐triggering via an adjustable level
External triggering via the digital control input (Pre‐Trigger)
Internal post‐triggering via an adjustable level
External triggering via the digital control input (Post‐Trigger)
Gross or net measured values can be conditioned as measured values (TAS).
The input mode should be set to IMD1.
The trigger function is described in the Online Help, Trigger Function Overview.

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5.4 Limit value function
Four limit values are available in the PW15AHi, which are set via the LIV
command. The status of the limit value functions can be read from the
measurement status (MSV? or RIO?). You can choose between the gross
value, the net value, the trigger result or the MIN/MAX extreme values as the
input signal for limit value monitoring. The input mode should be set to IMD0/1.
As these load cells do not have any digital outputs, the external Master control
must make digital I/Os available. The PW15AHi generates the information to
control these digital outputs in the respective measurement statuses (MSV
measurement status, RIO). The Master control then only needs to forward
these control bits to its digital outputs, in order to drive the limit value outputs.
For more detailed information, see the Online Help, Limit Value Function.
5.5 Extreme value function
The PW15AHi includes a peak value function that can monitor either gross or
net measured values, as required. Output of the two peak values (MIN and
MAX) is implemented by the PVA command. The CPV command can be used
at any time to clear the extreme values. The PVS command is used for
activation.
For more detailed information, see the Online Help, Extreme Value Function.
5.6 Dosing and filling control
The PW15AHi includes dosing control. As this load cell does not have any
digital outputs, the external Master control must make digital I/Os available.
The PW15AHi generates the information to control these digital outputs in the
respective measurement statuses (MSV measurement status, RIO). The
Master control then only needs to forward these control bits to its digital
outputs, in order to drive the valves of the dosing device.
The PW15AHi contains 32 parameter sets that are held in the EEPROM. The
RDP command is used to select them. Dosing parameters can be changed
while dosing is ongoing.
The filling and dosing function is activated by the command IMD2. In this case,
the settings of the limit value function and the trigger function have no
significance.
The dosing function can be found in the Online Help, Dosing Control Com
mands.

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5.7 Diagnostic function
The PW15AHi has an integral diagnostic function for monitoring dynamic
measuring processes. This function includes a memory for 512 (binary)
measured values and associated status information. Different recording modes
are available so that the processes can be analyzed without interrupting
measurement.
The advantage of this diagnostic function is that the measured values are
stored in real time (without loss of data) and then read out slowly (OFF-line).
This means that it is possible to access this real‐time data even at low
communication rates.
The diagnostic function is accessed via the serial interface (UART with
RS‐485, CAN bus or DeviceNet = main communication channel). There is no
separate hardware interface implemented for this.
The diagnostic function is explained in the Online Help, see description of com
mands for Diagnosis with PW15AHi.

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6 Electrical connection
6.1 PW15AHi pin assignments
IMPORTANT
The PW15AHi must be operated with a supply voltage up to 30 V.
Incorrect connections between the supply and the interface cables can
cause irreversible damage.
Check the correct assignment of the connections before switching on for
the first time.
Any HBM guarantee is rendered invalid for damage caused by incorrect
connections.
The PW15AHi is fitted with an 8 pin connector socket.
Connector socket,
8 pin, made by
Lumberg
8
234
6
7
1
5
Fig. 6.1 Electrical connection
Terminal RS‐485 CANopen DeviceNet Color code for
1‐Kab165‐3 1)
1GND GND GND white
2 unassigned unassigned unassigned brown
3RA CanH in CanH in green
4Trigger / Stop Dosing Trigger / Stop Dosing Trigger / Stop Dosing yellow
5RB CanL in CanL in gray
6 TB CanL out CanL out pink
7TA CanH out CanH out blue
812...30 V 12...30 V 12...30 V red
1) Cable 1‐KAB165‐3 is available as an accessory.
Take into account the relevant cable length restrictions for your bus system,
which are dependent on the baud rate.

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NOTES:
The housing of the PW15AHi load cell is connected to the cable shield via
the connector socket. To obtain an EMC‐compliant connection
(EMC = electromagnetic compatibility), the shield of this cable must be
connected to the housing of the connected device or to ground potential.
The shield must be connected directly and with low impedance (e.g. with
EMC‐compliant PG bushings).
Use shielded, low‐capacitance cables only for all connections (interfaces,
supply and auxiliary equipment) - (HBM measurement cables fulfill these
requirements).
Electrical and magnetic fields often induce interference voltages in the
measurement electronics. Do not route the measurement cables parallel to
power lines and control circuits. If this is not possible, protect the
measurement cable (with steel conduits, for example). Avoid stray fields
from transformers, motors and contact switches.
Should it be necessary, a separate cable can be used to establish potential
equalization between the PW15AHi and the (PC/PLC) master (grounding
concept). The cable shielding must not be used for this potential
equalization.
6.2 Supply voltage
Regulated dc voltage of +12 to +30 V is required to operate the measurement
electronics and serial communication.
Voltage source requirements:
The supply voltage must be sufficiently smoothed (effective value minus
residual ripple > 12 V).
The PW15AHi electronics have a low‐loss control with a power consumption
of 1.5 W during operation. The current consumption is therefore dependent
on the level of the supply voltage:
][
1.5
][ VVoltage
W
Af
Power requirement 
When switched on, the electronics briefly consume a current of approx.
0.15 A. To ensure a safe start‐up, the power supply must be able to provide
this current without a limit being triggered. It is particularly important to take
this into consideration when supplying several PW15AHi load cells from a
single power supply unit. In contrast, the sustained loading is calculated
from the formula shown above.

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Connection to a wide‐ranging supply network is not permitted as this often
causes interfering voltage peaks to be coupled into the transducer. Instead,
a local supply must be provided for the PW15AHi load cells (even when
grouped).
The supply voltage must be insulated from the shield potential. A connection
from GND to the housing is not required, but the potential difference must
be max. 10 V.
Should it be necessary, a separate cable can be used to establish potential
equalization between the PW15AHi and the (PC/PLC) master (grounding
concept). The cable shielding must not be used for this potential
equalization.
The power supply ground wire (GND) is also used as the reference potential
for the interface signals and the control input.
In layouts with several transducers, the supply can be laid together with the
RS‐485 bus lines in a 6‐pin cable (with HBM junction boxes, for example).
Ensure that an adequate wire cross‐section is provided, as some cable
sections will conduct the supply current for all the connected PW15AHi load
cells.

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7 Interfaces
IMPORTANT
The PW15AHi interface driver relates to GND. The Master interface driver
must also relate to this GND.
A shielded cable must be used as the bus cable. The shield should always
be connected to the housing at both ends. The shield of the PW15AHi cable
is electrically connected to the measuring body (see PW15AHi pin
assignments).
Should it be necessary, a separate cable can be used to establish
potential equalization between the PW15AHi and the (PC/PLC) master
(grounding concept). The cable shielding must not be used for this
potential equalization.
Before installing several PW15AHi into an installation with a bus system, take
the following into account:
The printed production number (typeplate) is required for setting up data
communication. If the typeplate can no longer be seen after installation, the
numbers of each PW15AHi should be noted beforehand. This enables different
addresses to be assigned during the initial start‐up.
Alternatively, before connection to the bus system, you can connect each
PW15AHi individually with a PC, in order to set different addresses (see ADR
command, Online Help).
7.1 RS‐485 4-wire interfaces (UART)
PW15AHi load cells are supplied with an RS‐485 interface. Baud rates of
1200 115200 baud can be set for the interface. The power supply ground
(GND) of the PW15AHi load cell is used as the reference ground for all the
interface signals.
A single PW15AHi load cell can be connected via the RS‐485 interface, or you
can set up a bus system to connect several PW15AHi load cells to an RS‐485
interface. All transducers on a line are switched in parallel and are
differentiated by the software assigning different addresses. If the control
computer has an RS‐232 interface, an interface converter is required (e.g. from
HBM, Order No.: 1‐SC232/422B). The correct assignment of the transmit and
receive lines can be seen in Fig. 7.1 (bus line Ra to Ta of the converter, etc.).
The HBM converter and the PW15AHi both already contain bus termination
resistors. So additional bus termination resistors for for RS‐485 are not
required. Up to 32 PW15AHi can be connected to one bus.

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RB
RA
TB
TA
RB RA TB TA RB RA TB TA
Bus coupler
Control
computer
RS‐485‐BUS
UB
GND
UB GND UB GND
PW15AHi electronics PW15AHi electronics
Fig. 7.1 Connection of several PW15AHi to a computer via an RS‐485 4‐wire bus
7.2 CANopen interface
The interface is set up using the CANopen standard CiA DS301
Bus configuration
The CAN bus is configured as a 2‐wire circuit (CanH and CanL) (see
ISO11898). It is essential for bus termination resistors (each 120 W) to be
connected at the start and end of the bus. The PW15AHi does not contain a
bus termination resistor. The bus wiring structure was chosen to minimize the
length of the stub lines.
Fig. 7.2 CAN bus wiring

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IMPORTANT
The PW15AHi CAN bus driver relates to GND. The Master CAN bus driver
must also relate to this GND.
Baud rate and bus cable lengths
The table below gives the maximum cable lengths for the CANopen bus, subject to
the baud rate:
Baud rate [kBits/s] 10 20 50 125 250 500 800 1000
Max. cable length [m] 5000 2500 1000 500 250 100 50 25
The max. cable length is the total line length, calculated from the length of all
the stub lines per node (bus nodes) and the line length between the nodes.
The length of the spur lines per node is limited and depends on the baud rate
being used (see secondary CAN bus documentation: CiA DS102 V2.0 ).
When using the PW15AHi's CAN wiring with CAN_In and CAN_Out lines, the
length of the stub line to the PW15AHi is equal to zero. If only one connection
pair (CAN_In or CAN_Out) is used, the cable length of the PW15AHi counts as
the stub line.
Setting the address
The address is set via the bus:
CAN bus: 1...127 (default on delivery: 63)
Setting the bit rate
The bit rate is set with the fieldbus configuration tool via the bus; the factory
setting is 125 Kbits.
CANopen communication is explained in the Online Help, CANopen Commu
nication description.
7.3 DeviceNet interface
The interface is designed to the DeviceNet specification Release 2.0 ODVA.
Bus configuration
The DeviceNet bus is configured as a 2‐wire CAN bus (CanH and CanL) (see
ISO11898). It is essential for bus termination resistors (each 120 W) to be
connected at the start and end of the bus. The PW15AHi does not contain a
bus termination resistor (line termination). The bus wiring structure was chosen
to minimize the length of the stub lines.