H&B LDU 179.1 User manual

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 1 of 45
Load Cell Digitizing Unit
Type LDU 179.1
TECHNICAL MANUAL
Firmware Version 179.181.v.1.10 or higher
Hardware Version 179.101.5.v.1.01
Document No. X179 Rev 1.1 EN
Hauch & Bach ApS
Femstykket 6
DK-3540 Lynge
Denmark
www.haubac.com

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 2 of 45
Table of Contents:
1. Safety Instructions ....................................................................................................................................5
2. Declaration of Conformity.........................................................................................................................6
3. Introduction and Specifications...............................................................................................................7
4. Communications and Getting started .....................................................................................................8
4.1. Serial Interface............................................................................................................................................8
4.2. Command Language ....................................................................................................................................8
4.3. Baud Rate...................................................................................................................................................8
4.4. Getting Started............................................................................................................................................8
5. Hardware and Wiring.................................................................................................................................9
5.1. Wiring .......................................................................................................................................................9
5.2. With Unit Adapter UA 73.2 ..........................................................................................................................9
5.3. Terminal Configuration.................................................................................................................................9
5.4. Load Cell Connection ................................................................................................................................. 10
5.5. Serial Port Connection................................................................................................................................ 10
5.6. CAN Connection ........................................................................................................................................ 10
5.7. Function of the solder pads ........................................................................................................................ 10
6CANopen interface ..................................................................................................................................11
6.1 General .................................................................................................................................................... 11
6.2 The PDOs ................................................................................................................................................. 12
6.3 The SDOs ................................................................................................................................................. 13
6.4 Communication Profile ............................................................................................................................... 14
6.5 Object Directory ........................................................................................................................................ 14
7. Commands –Overview...........................................................................................................................21
8. Commands Description ..........................................................................................................................23
8.1. System Diagnosis Commands –ID, IV, IS, SR, RS ........................................................................................ 23
8.1.1. ID Get Device Identity ....................................................................................................................................23
8.1.2. IV Get Firmware Version................................................................................................................................23
8.1.3. IS Get Device Status......................................................................................................................................23
8.1.4. SR Software Reset.........................................................................................................................................23
8.1.5. RS Read Serial Number.................................................................................................................................24
8.2. Calibration Commands –CE, CM n, CI, MR, DS, DP, CZ, CG, ZT, FD, IZ, ZR, ZI, TM, TN, ZN, AZ, AG, CS........... 24
8.2.1. CE Read TAC* Counter / Open Calibration Sequence...................................................................................24
8.2.2. CM n Set Maximum Output Value................................................................................................................24
8.2.3. CI Set Minimum Output Value........................................................................................................................24
8.2.4. MR Set Multi-range / Multi-interval.................................................................................................................25
8.2.5. DS Set Display Step Size...............................................................................................................................25
8.2.6. DP Set Decimal Point Position.......................................................................................................................25
8.2.7. CZ Set Calibration Zero Point ........................................................................................................................25
8.2.8. CG Set Calibration Gain (Span).....................................................................................................................26
8.2.9. ZT Enable / Disable Zero Tracking.................................................................................................................26
8.2.10. FD Reset to Factory Default Settings.............................................................................................................26
8.2.11. IZ Correction of System Zero......................................................................................................................26
8.2.12. ZR Zero Range ..............................................................................................................................................27
8.2.13. ZI Initial Zero Range.......................................................................................................................................27
8.2.14. TM Tare mode.............................................................................................................................................27

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 3 of 45
8.2.15. TN Set / Clear Non-Volatile Tare....................................................................................................................27
8.2.16. ZN Set / Clear Non-Volatile Zero....................................................................................................................28
8.2.17. AZ Absolute zero point calibration (eCal).......................................................................................................28
8.2.18. AG Absolute gain calibration (eCal) ...............................................................................................................28
8.2.19. CS Save the Calibration Data ........................................................................................................................28
8.3. Motion Detection Commands –NR, NT ........................................................................................................ 29
8.3.1. NR Set No-motion Range...............................................................................................................................29
8.3.2. NT Set No-motion Time..................................................................................................................................29
8.4. Filter Setting Commands –FM, FL, UR......................................................................................................... 29
8.4.1. FM Filter Mode...............................................................................................................................................29
8.4.2. FL Filter setting ..............................................................................................................................................30
8.4.3. UR Update Rate and Averaging.....................................................................................................................31
8.5. Taring and Zeroing Commands –SZ, ZA, RZ, ST, RT, SP............................................................................... 31
8.5.1. SZ Set System Zero.......................................................................................................................................31
8.5.2. ZA Set Averaged System Zero.......................................................................................................................31
8.5.3. RZ Reset Zero................................................................................................................................................31
8.5.4. ST Set Tare....................................................................................................................................................32
8.5.5. RT Reset Tare................................................................................................................................................32
8.5.6. SP Set Preset Tare ........................................................................................................................................32
8.6. Output Commands –GG, GN, GT, GS, GW, GA, GL, OF................................................................................. 32
8.6.1. GG Get Gross Value......................................................................................................................................32
8.6.2. GN Get Net Value ..........................................................................................................................................32
8.6.3. GT Get Tare Value.........................................................................................................................................32
8.6.4. GS Get ADC Sample Value ...........................................................................................................................33
8.6.5. GW Get Data String “Net, Gross and Status“.................................................................................................33
8.6.6. GA Get Triggered Average Value...................................................................................................................33
8.6.7. GL Get Data String “Average, Gross and Status“ ..........................................................................................33
8.6.8. OF Output Format for Data String GW and GL ..............................................................................................33
8.7. Auto–transmit Commands –SG, SN, SX, SA, SL ........................................................................................... 34
8.7.1. SG Send Gross Value continuously...............................................................................................................34
8.7.2. SN Send Net Value continuously ...................................................................................................................34
8.7.3. SX Send ADC Sample Value continuously ....................................................................................................34
8.7.4. SA Send Triggered Average Value automatically ..........................................................................................34
8.7.5. SL Send Data String “Average, Gross and Status“ automatically ..................................................................34
8.8. Commands for External I/O Control –IN, IO and OM.................................................................................... 35
8.8.1. IN Read status of the logic inputs...................................................................................................................35
8.8.2. IO Read / modify the status of the logic outputs.............................................................................................35
8.8.3. OM Control of the logic outputs by the host application .................................................................................35
8.9. Setpoint Output Commands –S’n’, H’n’, A’n’, HT .......................................................................................... 36
8.9.1. S‘n’ Setpoint Value.........................................................................................................................................36
8.9.2. H’n’ Hysteresis and Switching Action for a Setpoint.......................................................................................36
8.9.3. A’n’ Allocation source for a Setpoint...............................................................................................................36
8.9.4. HT Hold time for all Setpoints.........................................................................................................................37
8.10. Communication Setup Commands –AD, NA, NS, BR, DX............................................................................... 38
8.10.1. AD Device Address –Serial channel..............................................................................................................38
8.10.2. NA Network Address - CAN...........................................................................................................................38
8.10.3. NS Network Settings –For Serial Channel and CAN Interface...................................................................38
8.10.4. BR Baud Rate –Serial channel......................................................................................................................39
8.10.5. DX Full Duplex –Serial channel.....................................................................................................................39
8.11. Save Calibration and Setup Data Commands –CS, WP, SS, GI, PI.................................................................. 40
8.11.1. CS Save the Calibration Data ........................................................................................................................40
8.11.2. WP Save the Setup Parameters ....................................................................................................................40
8.11.3. SS Save Setpoint Parameters........................................................................................................................40
8.11.4. GI Get an Image File from the EEPROM .......................................................................................................40
8.11.5. PI Download an Image File to the EEPROM..................................................................................................40
8.12. Trigger Commands –SD, MT, GA, TE, TR, TL, SA......................................................................................... 41
8.12.1. SD Start Delay Time.......................................................................................................................................41
8.12.2. MT Measuring Time .......................................................................................................................................41
8.12.3. GA Get Triggered Average Value...................................................................................................................41
8.12.4. TE Trigger Edge.............................................................................................................................................41
8.12.5. TR Software Trigger.......................................................................................................................................42
8.12.6. TL Trigger Level.............................................................................................................................................42
8.12.7. SA Send Triggered Average Value automatically ..........................................................................................42

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 4 of 45
8.13. Re-Trigger Commands –RW, TT, TS, DT, TW and TI ................................................................................... 43
8.13.1. RW Trigger Window for Re-Trigger Function.................................................................................................43
8.13.2. TT Averaging Time for Re-trigger Function.................................................................................................43
8.13.3. TS Stop Value for Re-trigger Function ........................................................................................................43
8.13.4. DT Short-time Averaging Period..................................................................................................................43
8.13.5. TW Window for Automatic Taring...................................................................................................................44
8.13.6. TI Averaging Time for Automatic Taring.........................................................................................................44
9. Use in “Approved” Applications............................................................................................................45

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 5 of 45
RIGHTS AND LIABILITIES
All rights reserved.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any
means, mechanical, photocopying, recording, or otherwise, without the prior written permission of Hauch &
Bach ApS.
No patent liability is assumed with respect to the use of the information contained herein. While every
precaution has been taken in the preparation of this book, Hauch & Bach assumes no responsibility for errors
or omissions. Neither is any liability assumed for damages resulting from the use of the information contained
herein.
The information herein is believed to be both accurate and reliable. Hauch & Bach, however, would be obliged
to be informed if any errors occur. Hauch & Bach cannot accept any liability for direct or indirect damages
resulting from the use of this manual.
Hauch & Bach reserves the right to revise this manual and alter its content without notification at any time.
Neither Hauch & Bach nor its affiliates shall be liable to the purchaser of this product or third parties for
damages, losses, costs, or expenses incurred by purchaser or third parties as a result of: accident, misuse, or
abuse of this product or unauthorized modifications, repairs, or alterations to this product, or failure to strictly
comply with Hauch & Bach operating and maintenance instructions.
Hauch & Bach shall not be liable against any damages or problems arising from the use of any options or any
consumable products other than those designated as Original Hauch & Bach Products.
NOTICE: The contents of this manual are subject to change without notice.
Copyright © 2012-2013 by Hauch & Bach ApS, DK-3540 Lynge, Femstykket 6, Denmark
1. Safety Instructions
CAUTION READ this manual BEFORE operating or servicing this equipment. FOLLOW these
instructions carefully. SAVE this manual for future reference. DO NOT allow untrained personnel to
operate, clean, inspect, maintain, service, or tamper with this equipment. ALWAYS DISCONNECT
this equipment from the power source before cleaning or performing maintenance.
CALL Hauch & Bach ApS for parts, information, and service.
WARNING ONLY PERMIT QUALIFIED PERSONNEL TO SERVICE THIS EQUIPMENT.
EXERCISE CARE WHEN MAKING CHECKS, TESTS AND ADJUSTMENTS THAT MUST BE
MADE WITH POWER ON. FAILING TO OBSERVE THESE PRECAUTIONS CAN RESULT IN
BODILY HARM.
WARNING FOR CONTINUED PROTECTION AGAINST SHOCK HAZARD CONNECT TO
PROPERLY GROUNDED OUTLET ONLY. DO NOT REMOVE THE GROUND PRONG.
WARNING DISCONNECT ALL POWER TO THIS UNIT BEFORE REMOVING THE FUSE OR
SERVICING.
WARNING BEFORE CONNECTING/DISCONNECTING ANY INTERNAL ELECTRONIC
COMPONENTS OR INTERCONNECTING WIRING BETWEEN ELECTRONIC EQUIPMENT
ALWAYS REMOVE POWER AND WAIT AT LEAST THIRTY (30) SECONDS BEFORE ANY
CONNECTIONS OR DISCONNECTIONS ARE MADE. FAILURE TO OBSERVE THESE
PRECAUTIONS COULD RESULT IN DAMAGE TO OR DESTRUCTION OF THE EQUIPMENT OR
BODILY HARM.
CAUTION OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE
DEVICES.

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 6 of 45
2. Declaration of Conformity
EG-Konformitätserklärung
EC-Declaration of Conformity
Monat/Jahr: month/year:
02/2019
Hersteller: Manufacturer:
Hauch & Bach ApS
Anschrift: Address:
Femstykket 6
DK-3540 Lynge
Dänemark/ Denmark
Produktbezeichnung:Product name:
LDU 179.1
Das bezeichnete Produkt stimmt mit folgenden Vorschriften der Europäischen Richtlinien überein:
This product confirms with the following regulations of the Directives of the European Community
Richtlinie 2014/30/EUdes Europäischen
Parlaments und des Rates vom 26. Februar 2014
zur Angleichung der Rechtsvorschriften der Mitglied-
staaten über die elektromagnetische Verträglichkeit
und zur Aufhebung der Richtlinie 2004/108/EC.
Directive2014/30/EUoftheEuropeanParliamentandofthe
Councilof26thFebruary2014ontheapproximationofthelawsof
theMemberStatesrelatingtoelectromagneticcompatibilityand
repealing Directive2004/108/EC.
DieseErklärungbescheinigtdieÜbereinstimmung mit
dengenanntenRichtlinien,beinhaltetjedochkeine
ZusicherungvonEigenschaften.
Thisdeclarationcertifies theconformitywiththelisteddirectives,
butitisnopromiseofcharacteristics.
Richtlinie 2014/35/EU Niederspannungs-Richtlinie
Directive 2014/35/EULowVoltage Directive
FolgendeNormenwerdenzumNachweisderÜbereinstimmungmitdenRichtlinieneingehalten:
Asaproofofconformitywiththedirectivesfollowingstandardsarefulfilled:
OIMLR-76-1
Nicht-SelbsttätigWaagen–MetrologischeundtechnischeAnforderungen (OIMLR-76:2006Teil1)
Non-automaticweighingsystems–Metrologicalandtechnicalrequirements(OIML R-76:2006Part1)
DINEN
45501
MetrologischeAspektenichtselbsttätigerWaagen;DeutscheFassung EN45501:2015
AnhangB.3:FunktionsprüfungenunterStöreinflüssen
AnhangC:VerfahrenfürdiePrüfungderStörfestigkeitgegenhochfrequenteelektromagnetischeFelder.
Michael Bach
ManagingDirector

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 7 of 45
3. Introduction and Specifications
The model LDU 179.1 is a very precise high-speed digital amplifier for weighing and force measurements with
strain gauge (SG) sensors. The LDU 179.1 can be used in legal for trade as well as for industrial applications.
The device features a CAN interface with support for the CANopen protocol as well as a full duplex RS232
interface using a straightforward ASCII command set. The LDU 179.1 and the well known LDU 78.1, both use
nearly the same command set. The LDU 179.1 with its accurate A to D converter and a sample rate of up to 1200
measurement values per second, is particularly suitable for static or dynamic measurements and control
purposes.
Specifications
Accuracy class
III or IIII
Test certificate according OIML R76
10 000 intervals or n x 10 000 intervals
(n = 1, 2, 3)
Maximum number of verification scale intervals (n)
10 000
Minimum input voltage per VSI
µV
0.2
Measuring range (FS)
mV/V
±3.3
Maximum resolution at FS (approx.)
incr.
±880000
Measuring rate
Hz
9.4 to 1200
Digital filter cut-off frequency (-3dB)
Hz
0.25 to 18
Bridge excitation voltage
VDC
5
Maximum bridge excitation current
mA
115
Load cell cable length (for n = 10 000)
m/mm2
726
Maximum resistance per wire (for n = 10 000)
Ω
12.3
Linearity error (relative to full scale)
%
±0.0005
Temperature effect on zero (relative to full scale)
%/10 K
±0.0003 (Typical)
Temperature effect on span
%/10 K
±0.001 (Typical)
Interface 1
CAN
Bit rate
kbits/s
10 to 1000
Protocol
CAN Open
Interface 2
RS-232
Baud rate
bits/s
9600 to 460800
Frame format
8 data bits, 1 stop bit, no parity bits
Protocol
Readable ASCII
Logical inputs
2
Maximum input voltage
VDC
30
Threshold voltage (approx.)
VDC
6
Input resistance (approx.)
kΩ
8
Logical outputs
2
Maximum voltage
VDC
30
Maximum current
A
0.5
Supply voltage
VDC
10 to 30
Power consumption (without load cells)
mW
<250
Operating temperature range
°C
-15 to +55
Storage temperature range
°C
-30 to +70
Dimensions (LxWxH) excluding pins
mm
81.3 x 30.7 x 6.5
Weight
g
28
Protection
IP20

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 8 of 45
4. Communications and Getting started
4.1. Serial Interface
Communicating with the LDU 179.1 digitizer is carried out via serial RS 232 port.
The data format is the familiar 8/N/1 structure (8 data bits, no parity, 1 stop bit).
Available baud rates via the RS232 port are as follows: 9600, 19200, 38400, 57600, 115200, 230400 and
460800 baud.
Factory default: 115200 baud
4.2. Command Language
The command set of the LDU 179.1 is based on a simple ASCII format (2 letters). This enables the user to
setup the device, get results or check parameters.
Example: LDU 179.1 is connected via the RS232 port to a PC / PLC system. You want to get the identity,
firmware version or net weight.
Remark: In this manual means: Space “_“ and Enter (CR/LF) ““
Master (PC / SPS) sends
Slave (LDU 179.1) responds
Meaning
ID
D:1790
Identity of the device
IV
V:0107
Firmware version of the device
GN
N+1234.56
Net weight with algebraic sign/floating point
4.3. Baud Rate
For baud rate setup use command BR, see chapter 8.10.4
Factory default: 115200 baud
4.4. Getting Started
You will require:
PC or PLC with a RS232 communication port
A load cell / scale with test weights or a load cell simulator
A 12-24 VDC power supply capable of delivering approximately 100mA
One or more LDU 179.1
A suitable ASCII communication software **
Refer to the following wiring diagram in chapter 5.
**
You can easily communicate between a PC and a LDU 179.1 using programs such as Procomm, Telemate,
Kermit, HyperTerminal or HTerm etc.
Additional the powerful software DOP 4 with graphical user interface and oscilloscope function for the operating
systems Windows XP / Vista / 7 / 8 / 10 is available.

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 9 of 45
5. Hardware and Wiring
5.1. Wiring
Colour code of standard Flintec load cells Pins of the LDU 179.1
5.2. With Unit Adapter UA 73.2
Note: The power, supplied to the LDU179.1, must be limited to 15VA with a suitable current limit device,
e.g. a fuse".
5.3. Terminal Configuration
LDU 179.1
Load cell
Pin no.
0
Shield
1
+ Excitation
2
+ Sense
3
+ Signal
4
–Signal
5
–Sense
6
–Excitation
7
Shield
8
NC
9
NC
LDU 179.1
Pin
Function
Pin no.
10
TxD
RS232 TxD
11
RxD
RS232 RxD
12
CANL
CAN line low
13
CANH
CAN line high
14
In 0
Logical input 0
15
Out 0
Logical output 0
16
In 1
Logical input 1
17
Out 1
Logical output 1
18
+ Pwr
Power supply +10..+30 VDC
19
Gnd
Power supply -
Serial Port: Terminal 10, 11,
and 19 (Gnd).
CAN Port: Terminal 12, 13,
and 19 (Gnd).
In/Out 0: Terminal 14, 15
In/Out 1: Terminal 16, 17
Power supply 12...30 VDC
Terminal 18: +Pwr
Terminal 19: Gnd

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 10 of 45
5.4. Load Cell Connection
The load cell wiring should be made carefully before applying power to avoid damages to the amplifier and the
load cells. The input resistance of the load cells that you want to connect should be ≥43 Ω(ohms). In case of a
four wire load cell the sense wires must be connected to the excitation i.e. pin 1 to pin 2 and pin 5 to pin 6, or
use the solder pads SW1 and SW2 on the underside.
5.5. Serial Port Connection
The RS232 port can be used for communication with a PC, PLC system or other devices. The Gnd terminal
(pin 19) must be used as signal ground for the RS232 interface.
Note: The serial port (Interface 2) can be switched into Modbus mode and back to ASCII mode. In Modbus
mode, this interface can run Modbus RTU protocol. The procedure to switch between the modes and the
Modbus RTU communication is described in the sepperate manual LDx_Modbus Comm_rev.1.0.
5.6. CAN Connection
The CAN lines can be connected to a CANopen master. Termination resistors must be present in the CAN
network, but there are no such resistors inside the LDU179.1. The Gnd terminal (pin 19) must be used as
signal ground for the CAN interface.
5.7. Function of the solder pads
The solder pads have the functions as described below. The label print and the photos shows the position of
the solder pads SWx.
LDU179.1 Top View
LDU179.1 Bottom View
Functions of the solder pads on bottom side:
SW1 & SW2 : Close for 4-wire load cells.
SW3 : Close to enter configuration mode.
SW4 : Do NOT close –used for program download only.
SW5 : This switch can connect the power supply ground to the shield.

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 11 of 45
6 CANopen interface
6.1 General
The CAN interface follows the CAN2.0B recommendations. It receives both - 11 bit identifiers,
and tolerates 29 bit identifiers. It only transmits 11 bit identifiers.
The CAN rate is setup as default to 500 kbit/s.
The LDU is always quiet on the CAN bus until the NMT Start command is received, except for
the very first ‘node guard’ message.
When started by the NMT Start the LDU 179.1 starts transmitting TPDO1 messages with weight and status.
The default is the net value. When filling is in progress the gateway transmits a TPDO2 every time a
module changes state to ‘wait for trigger’. This TDPO2 contains the module number, the module status
and the dosed weight. In checkweigher applications the TPDO2 is used to send triggered measurements.
With RDPO1 frames you can send simple commands without an acknowledgement. The functions are:
select gross or net value in TPDO1, set or clear system zero, set or clear tare.
With RPDO2 frames you can send triggers or stop triggers. For the filling application the trigger can
be used to start the filling cycle. On checkweigher applications the trigger can start measurements
and a stop-trigger will stop further internal re-triggers.
In case of an overrun, error or failure an EMERGENCY message is sent to the CAN controller
indicating the nature of the error or failure.
RPDO3 and RPDO4 are ignored by the LDU.
SDOs are handled according to profile and CANopen recommendation.
The LDU supports both ‘node guarding’ and ‘heart beat’.

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 12 of 45
6.2 The PDOs
The Weight and status is sent using TPDO1. One TPDO1 is sent each time a new measurement is ready. The
high measuring rate of the LDU 179.1 will result in approx. 1200 TPDO1’s per second. If the system can’t
handle so many messages the update rate can be reduced –see the UR command.
The TPDO2 is sent when an average measurement is ready. The TPDO2 has the same format as TPDO1.
The TPDO3 is sent when the tare changes. It has the same format as TPDO1.
The format of the TPDO1, TPDO2 and TPDO3 is:
32 bit
16 Bit
8 bits
8 Bit
Weight
Status
0
0
The first field is a single precision float value carrying weight information, gross or net value if it is a TDPO1,
average weight if it is a TPDO2 and tare value if it is a TPDO3.
Then status follows as a 16 bit field with the following values defined:
$0001 - Under range,
$0002 - Over range,
$0008 - Center zero,
$0010 - No motion,
$0020 - Tare set,
$0080 –ADC Error,
$0100 - Set-point 0 (source>limit),
$0200 - Set-point 1,
TPDO1
Weight values are available at all times
The following table shows the information of TPDO1:
32 bit 16 bit 8 bit 8 bit
Weight
Module Status
0
0
Default: Net weight.
Refresh time: Controlled by the setup of command UR.
Format: Floating point single precision (IEEE 754)
TPDO2
Average weight GA is available and refreshes when a new measurement is ready.
TPDO3
Tare weight GT is available and refreshes when a new tare value is set.
RPDO1
The following commands can be executed direct:
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
SG
SN
ST
RT
SZ
RZ
128
64
08
04
02
01
Examples:
- Setting tare: Transmit RPDO1 [08]
- Setting gross weight in TPDO1: Transmit RPDO1 [128]

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 13 of 45
RPDO2
The following commands can be executed direct:
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
TR
128
Example:
- Setting trigger start: Transmit RPDO2 [128]
6.3 The SDOs
The CANopen SDOs is a confirmed service, and overrun does not occur if the CAN controller only communicates
with the LDU in the PRE-OPERATIONAL state. When a SDO has been received by the controller no further
communication takes place until the service has been acknowledged (or a timeout occurs).
SDO’s
Are only available on request
See tables 6.5 Object Directory
Can be used for complete setup of the LDU 179.1 via CAN bus master, e.g:
- Filter setting: Index 2100, Subindex 4
- Filter Mode setting: Index 2100, Subindex 9
Can be used to get information regarding all the commands available, e.g:
- Net weight: Index 2900, Subindex 2
- AD sample: Index 2900, Subindex 7

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 14 of 45
6.4 Communication Profile
The parameters, which are critical for communication, are determined in the communication profile.
This includes the data for manufacturer's product nomenclature, for identification, or the parameters for object
mapping.
Abbreviations used in Tables:
ro
read only
rw
read / write
wo
write only (read will not be regarded as an error, but returns undefined results)
UI8
Unsigned 8
UI16
Unsigned 16
UI32
Unsigned 32
I32
Signed 32
REAL32
32 bit IEEE754 floating point
VS
Visible String
6.5 Object Directory
The object directory of the CAN communication system is described below.
These entries are in the documentation for the sake of mapping information. These functions must be used
through Process Data Objects (PDO).

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 15 of 45
Communication Profile (Tables)
Index
Sub-
index
Name
Type
Attri-
bute
Default-value
Meaning
1000
0
Device Type
UI32
ro
0
Non standard device profile
1001
0
Error Register
UI8
ro
0
Bit 0: Generic error
Bit 4: Communication error
Bit 7: Manufacturer specific error
1002
0
Manufacturer Status
Register
UI32
ro
0
Not used
1005
0
COB-ID Sync message
UI32
rw
80H
COB-ID of the SYNC object
1006
0
Communication cycle
Period
UI32
rw
0
Not used
1007
0
Synchronous Window
Length
UI32
rw
0
Not used
100C
0
Guard Time
UI16
rw
320
Cycle time in ms, set by the NMT Master or the configuration tool.
Index 100Ch and 100Dh are used if index 1017h is zero.
100D
0
Life Time Factor
UI8
rw
3
Life time is set by the NMT Master or the configuration tool.
1014
0
COB-ID Emergency
Message
UI32
ro
80H +
Node ID
COB-ID of the Emergency Object
1017
0
Heartbeat Time
UI16
rw
0
Producer Heartbeat time in ms. If index 1017h is non-zero the Heartbeat
protocol is used, otherwise the Node-guard protocol is used.
1018
0
1
2
3
4
Identity Object
Vendor ID
Product Code
Revision Number
Serial Number
UI8
UI32
UI32
UI32
UI32
ro
ro
ro
ro
ro
4
269H
-
-
-
Number of entries
Vendor ID
Product Code
Revision Number
Serial Number
1400
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
200H +
Node ID
FFH
Communication parameters of 1st Receive PDO
Determined using the CANopen minimum system ID assignment
procedure.
Asynchronous communication.
1401
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
300H +
NodeID
FFH
Communication parameters of 2nd Receive PDO
Determined using the CANopen minimum system ID assignment procedure.
Asynchronous communication.

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 16 of 45
Index
Sub-
index
Name
Type
Attri-
bute
Default-value
Meaning
1402
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
80000400H +
NodeID
FFH
Communication parameters of 3rd Receive PDO
Determined using the CANopen minimum system ID assignment procedure.
Asynchronous communication.
1403
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
80000500H +
NodeID
FFH
Communication parameters of 4th Receive PDO
Determined using the CANopen minimum system ID assignment procedure.
Asynchronous communication.
1600
0
1
Entries in Rx PDO 1
1st Object Cmd. Byte
UI8
UI32
ro
ro
2
20060308H
Mapping parameters of the 1st Receive-PDO
Object is a bitwise command:
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Cmd:
SnG
SnN
ST
RT
SZ
RZ
1601
0
1
Entries in Rx PDO 2
1st Object Cmd. Byte
UI8
UI32
ro
ro
2
20060408H
Mapping parameters of the 2nd Receive-PDO
Object is a bitwise command:
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Cmd:
TR
TS
1602
0
Number of mapped
Entries in Rx PDO 3
UI8
ro
0
Mapping parameters of the 3rd Receive- PDO (disabled)
1603
0
Number of mapped
Entries in Rx PDO 4
UI8
ro
0
Mapping parameters of the 4th Receive-PDO (disabled)
1800
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
180H +
Node ID
FFH
Communication parameters of 1st Transmit PDO
Determined using the CANopen minimum system ID assignment procedure.
Asynchronous communication.

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 17 of 45
Index
Sub-
Index
Name
Type
Attri-
but
Default Value
Meaning
1801
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
280H +
Node ID
FFH
Communication parameters of 2nd Transmit PDO
Determined using the CANopen minimum system ID assignment procedure.
Asynchronous communication.
1802
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
380H +
NodeID
FFH
Communication parameters of 3rd Transmit PDO
Determined using the CANopen minimum system ID assignment procedure.
Asynchronous communication.
1803
0
1
2
Number of elements
COB-ID
Transmission type
UI8
UI32
UI8
ro
ro
ro
2
480H +
NodeID
FFH
Communication parameters of 4th Transmit PDO
Determined using the CANopen minimum system ID assignment procedure.
Asynchronous communication. (Not used, will not be transmitted)
1A00
0
1
2
Number of mapped
Entries in Tx PDO 1
1st Object
2nd Object
UI8
UI32
UI32
ro
ro
ro
2
29000120H
29000D10H
Mapping parameters of the 1st Transmit-PDO
32 bit IEEE754 floating point weight value.
Status
1A01
0
1
2
Number of mapped
Entries in Tx PDO 2
1st Object
2nd Object
UI8
UI32
UI32
ro
ro
ro
2
29000620H
29000D10H
Mapping parameters of the 2nd Transmit-PDO
32 bit IEEE754 floating point average value.
Status
1A02
0
1
2
Number of mapped
Entries in Tx PDO 3
1st Object
2nd Object
UI8
UI32
UI32
ro
ro
ro
2
29000320H
29000D10H
Mapping parameters of the 3rd Transmit- PDO
32 bit IEEE754 floating point Tare
Module Status
1A03
0
Number of mapped
Entries in Tx PDO 4
UI8
ro
0
Mapping parameters of the 4th Transmit-PDO (disabled)

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 18 of 45
Index
Sub-
Index
Name
Type
Attri-
but
Default Value
Meaning
2004
0
1
2
3
4
5
Number of entries.
Dummy
Calibration
General set-up
Dummy
Set-points
UI8
UI8
UI8
UI8
UI8
UI8
ro
wo
wo
wo
wo
wo
5
-
-
-
-
-
Number of parameters.
Not used
Save calibration settings (TAC protected)
Save general set-up parameters
Not used
Save set-point parameters.
2006
0
1
2
3
4
Number of entries
Dummy
Factory Default
Command byte 1
Command byte 2
UI8
UI8
UI8
UI8
UI8
ro
wo
wo
wo
wo
2
-
-
-
-
Number of system entries.
Not used
Set factory default values (TAC protected)
See RPDO1
See RPDO2
2100
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Number of entries.
Dummy
Dummy
Dummy
Filter setting
Dummy
Logic outputs
Logic inputs
Measure Time
Filter Mode
No motion Range
No motion Time
Output Mask
Dummy
Start Delay
Dummy
Dummy
Update Rate
Zero Tracking
Dummy
Dummy
Dummy
Reserved
Preset Tare
UI8
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
ro
rw
rw
rw
rw
rw
rw
ro
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
23
0
0
0
3
0
-
-
0
0
1
1000
0
0
0
0
0
0
0
0
0
0
1
0
Number of parameters.
Not used
Not used
Not used
Filter setting
Not used
Digital Outputs
Digital Inputs
Measuring Time
Filter mode
No-motion range
No-motion time
Digital outputs mask
Not used
Start Delay
Not used
Not used
Update rate
Zero track (TAC protected)
Not used
Not used
Not used
For internal use –do not change
Preset Tare

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 19 of 45
Index
Sub-
Index
Name
Type
Attri-
but
Default Value
Meaning
2300
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Number of entries.
Absolute gain
Absolute zero
Calibrate enable
Calibrate gain
Dummy
Dummy
Calibrate max 1
Calibrate min
Dummy
Calibrate zero
Decimal point
Display step size
Multi Range
Calibrate max 2
Calibrate max 3
Initial zero range
Zero Range
Tare mode
Non volatile tare
Non volatile zero
UI8
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
ro
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
20
20000
0
-
20000
0
0
999999
-999999
0
0
3
1
0
0
0
0
0
0
0
0
Number of calibration parameters.
Absolute gain calibrate (TAC protected)
Absolute zero calibrate (TAC protected)
Calibrate enable (enables TAC when the TAC is written)
Calibrate gain (TAC protected)
Not used
Not used
Calibrate max 1 (TAC protected)
Calibrate min (TAC protected)
Not used
Calibrate zero (TAC protected)
Decimal point (TAC protected)
Display step size (TAC protect)
Multi range / multi interval selection (TAC protected)
Calibrate max 2 (TAC protected)
Calibrate max 3 (TAC protected)
Initial zero range (TAC protected)
Zero range (TAC protected)
Tare mode (TAC protected)
Non volatile / volatile tare select (TAC protected)
Non volatile / volatile zero select (TAC protected)
2500
0
1
2
3
4
5
6
7
8
9
10
11
Number of entries.
Trigger Level
Trigger Egde
ReTrigWindow
ReTrigTime
HoldTime
TareWindow
TareTime
ReTrigStop
Dummy
Dummy
Δ Time
UI8
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
I32
ro
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
11
0
0
65535
0
0
0
0
65535
0
0
50
Number of Check-Weigher parameters
Trigger Level
Trigger Egde
ReTrigWindow
ReTrigTime
HoldTime
TareWindow
TareTime
ReTrigStop
Not used
Not used
Delta time
2600
0
1
2
Number of entries.
Set-point 1
Set-point 2
UI8
I32
I32
ro
rw
rw
2
5000
10000
Number of Set-point parameters.
Set-point 1 value
Set-point 2 value

LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 20 of 45
Index
Sub-
Index
Name
Type
Attri-
but
Default Value
Meaning
2700
0
1
2
Number of entries.
Set-point 1
Set-point 2
UI8
I32
I32
ro
rw
rw
2
1
1
Number of Set-point parameters.
Set-point 1 hysteresis
Set-point 2 hysteresis
2800
0
1
2
Number of entries.
Set-point 1
Set-point 2
UI8
UI8
UI8
ro
rw
rw
2
0
0
Number of Set-point parameters.
Set-point 1 source
Set-point 2 source
2900
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Number of entries
Gross weight
Net Weight
Tare
Dummy
Dummy
Average weight
A/D sample
H&B Device ID
H&B FW Version
Device Status
Dummy
Serial Number
Extended status
UI8
REAL32
REAL32
REAL32
UI32
UI32
REAL32
I32
UI32
UI32
UI32
UI32
UI32
UI32
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
ro
12
-
-
-
0
0
-
-
-
-
-
0
-
-
Number of entries in info array.
Not used
Not used
Not used
See TPDO’s