Flintec LDU 69.1 User Manual
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ion 69.1
Version 6
t No. G1
1.v.2.32 o
.101.5.v.
1 Rev12
higher
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B
Table of Contents:
1. Safety Instructions .................................................................................................................................... 4
2. Declaration of Conformity ........................................................................................................................ 5
3. Introduction and Specifications ............................................................................................................... 6
4. Communications and Getting started ..................................................................................................... 7
4.1. Serial Interface ......................................................................................................................................... 7
4.2. Command Language ................................................................................................................................ 7
4.3. Baud Rate / Device Address .................................................................................................................... 8
4.4. Getting Started ......................................................................................................................................... 8
5. Hardware and Wiring ................................................................................................................................. 9
5.1. Wiring ....................................................................................................................................................... 9
5.2. With Unit Adapter UA 77.1 (RS232) ........................................................................................................ 9
5.3. With Unit Adapter UA 73.2 (RS422 / RS485 Full-/Half-Duplex) .............................................................. 9
5.4. 8-channel Adaptor Board UA 103.1 ....................................................................................................... 10
5.5. Terminal Configuration ........................................................................................................................... 10
5.6. Load Cell Connection ............................................................................................................................. 10
6. Calibration and Calibration Sequence ................................................................................................... 11
7. Commands – Overview ........................................................................................................................... 12
8. Commands Description .......................................................................................................................... 13
8.1. System Diagnosis Commands – ID, IV, IS, SR ..................................................................................... 13
8.1.1. ID Get Device Identity ................................................................................................................................... 13
8.1.2. IV Get Firmware Version ............................................................................................................................... 13
8.1.3. IS Get Device Status ..................................................................................................................................... 13
8.1.4. SR Reset LDU XX.X Firmware ...................................................................................................................... 13
8.1.5. RS Read Serial Number ................................................................................................................................ 13
8.2. Calibration Commands – CE, CM n, CI, MR, DS, DP, CZ, CG, ZT, ZR, ZI, FD, LC, LN n, CS ............ 14
8.2.1. CE Read TAC* Counter / Open Calibration Sequence ................................................................................. 14
8.2.2. CM n Set Maximum Output Value .................................................................................................................. 14
8.2.3. CI Set Minimum Output Value ....................................................................................................................... 14
8.2.4. MR Set Multi-range / Multi-interval ................................................................................................................. 15
8.2.5. DS Set Display Step Size .............................................................................................................................. 15
8.2.6. DP Set Decimal Point Position ...................................................................................................................... 15
8.2.7. CZ Set Calibration Zero Point ....................................................................................................................... 15
8.2.8. CG Set Calibration Gain (Span) ..................................................................................................................... 16
8.2.9. ZT Enable / Disable Zero Tracking ................................................................................................................ 16
8.2.10. ZR Set Zero Range ....................................................................................................................................... 16
8.2.11. ZI Initial Zero Range ...................................................................................................................................... 16
8.2.12. FD Reset to Factory Default Settings ............................................................................................................ 16
8.2.13. LC Clear Linearisation ................................................................................................................................... 17
8.2.14. LN n Linearisation .......................................................................................................................................... 17
8.2.15. CS Save the Calibration Data ....................................................................................................................... 17
8.3. Motion Detection Commands – NR, NT ................................................................................................. 18
8.3.1. NR Set No-motion Range ............................................................................................................................... 18
8.3.2. NT Set No-motion Time Period ..................................................................................................................... 18
8.4. Filter Setting Commands – FL, UR ........................................................................................................ 19
8.4.1. FL Filter Settings ........................................................................................................................................... 19
8.4.2. UR Averaging and Update Rate ..................................................................................................................... 19
LDU 69.1 Technisches Handbuch, Rev. 12 January 2011
Page 2 of 28
8.5.
Taring and Zeroing Commands – SZ, RZ, ST, RT ................................................................................ 20
8.5.1. SZ Set Zero ................................................................................................................................................... 20
8.5.2. RZ Reset Zero Point...................................................................................................................................... 20
8.5.3. ST Set Tare ................................................................................................................................................... 20
8.5.4. RT Reset Tare ............................................................................................................................................... 20
8.6. Output Commands – GG, GN, GT, GS, GW ......................................................................................... 21
8.6.1. GG Get Gross Value ...................................................................................................................................... 21
8.6.2. GN Get Net Value .......................................................................................................................................... 21
8.6.3. GT Get Tare Value ........................................................................................................................................ 21
8.6.4. GS Get ADC Sample Value ........................................................................................................................... 21
8.6.5. GW Get Data String “Net, Gross and Status“ ................................................................................................. 21
8.7. Synchronized Output Commands – HW, GH ......................................................................................... 22
8.7.1. HW Hold Weight ............................................................................................................................................. 22
8.7.2. GH Get Hold Weight....................................................................................................................................... 22
8.8. Auto–transmit Commands – SG, SN, SW ............................................................................................. 23
8.8.1. SG Send Gross Value continuously ............................................................................................................... 23
8.8.2. SN Send Net Value continuously .................................................................................................................. 23
8.8.3. SW Send Data String “Net, Gross and Status“ continuously .......................................................................... 23
8.9. Communication Setup Commands – AD, BR, CL, DX, OP ................................................................... 24
8.9.1. AD Device Address ........................................................................................................................................ 24
8.9.2. BR Baud Rate ................................................................................................................................................ 24
8.9.3. CL Close Device Address n .......................................................................................................................... 24
8.9.4. DX Half-duplex or Full-duplex ....................................................................................................................... 24
8.9.5. OP Open Device ............................................................................................................................................ 24
8.10. Save Calibration and Setup Data Commands – CS, WP ................................................................... 25
8.10.1. WP Einstell-Parameter sichern ...................................................................................................................... 25
9. Use in “Approved” Applications ............................................................................................................ 26
10. Updates – Firmware Download .............................................................................................................. 27
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 Flintec
GmbH
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, FLINTEC 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. FLINTEC, however, would be obliged to be
informed if any errors occur. FLINTEC cannot accept any liability for direct or indirect damages resulting from
the use of this manual.
FLINTEC reserves the right to revise this manual and alter its content without notification at any time.
Neither FLINTEC 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
FLINTEC operating and maintenance instructions.
FLINTEC 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 FLINTEC Products.
NOTICE: The contents of this manual are subject to change without notice.
Copyright © 2010-2011 by Flintec GmbH, 74909 Meckesheim, Bemannsbruch 9, Germany
LDU 69.1 Technisches Handbuch, Rev. 12 January 2011
Page 3 of 28
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LDU 69
.1 Technische
s Handbuch,
ev. 12 Jan
ary 2011
Page 4 o
28
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LDU 69
.1 Technische
s Handbuch,
ev. 12 Jan
ary 2011
Page 5 o
28
3. Introduction and Specifications
The model LDU 69.1 is a very precise digital amplifier for weighing and force measurements with strain gauge
(SG) sensors. The LDU 69.1 can be used in legal for trade as well as for industrial applications. The device
features full multi-drop communications capability and can be programmed via a straightforward ASCII
command set.
The LDU XX.X series and the amplifier DAS 72.1 with on-board digital display, use the same command set.You
can connect up to 32 SG amplifiers of either the LDU XX.X series or DAS 72.1 type onto a single RS 485 bus.
The LDU 69.1 with its very precision A to D converter and an internal sample rate of up to 172 measurement
values per second, is particularly suitable for static or dynamic measurements and control purposes. In multichannel applications, e.g. test stands (reference and test sample), the measurements have to be synchronized.
For this purpose there is a 8 channel adaptor board UA103 which is suitable for the synchrone operation of up
to 8 LDU 69.1 amplifiers.
LDU 69.1 Specifications
Accuracy class III
Test certificate according OIML R76 10 000 intervals, n x 10 000 intervals (n = 2 or 3)
Linearity < 0.001 % FS
Excitation 5 V AC (appr. 86 Hz), load cells > 250 Ohm; 6 wire technique
Analogue input range
Minimum input sensitivity 0.02 μV / d
Certified accuracy according OIML R76 0.1 μV / e (legal for trade)
Resolution > ± 1 000 000 counts (input); ± 1 000 000 counts (output)
Conversion rate 172 values/second internal, up to 172 values/second external
Digital filter
Calibration By software via ASCII commands, sehr einfach durchführbar
Communication interface
Standard weighing functions Gross, tare, net, zero, etc.
Temperature effect on zero Typical 1 ppm/°K; max. < 2 ppm/°K
Temperature effect on span Typical 1 ppm/°K; max. < 2 ppm/°K
Temperature range –15 °C to +50 °C (operation); –20 °C to +60 °C (storage)
Enclosure
Dimensions and weight
Power supply 12 ... 24 V DC ±10 %, < 60 mA, not galvanically isolated
Available accesoires
EMC OIML R-76:2006 and DIN EN 45 501:1992/AC1993
±11 mV (bipolar; for weighing applications, force and torque
measurements)
IIR filter 0.2 to 3 Hz; in 6 steps adjustable (0,2; 0,5; 1; 1,5; 2; 3)
Bessel, Gauss or Butterworth characteristics
RS485 oder RS422; Voll-Duplex oder Halb-Duplex;
9600 ... 115200 Baud; busfähig bis zu 32 Einheiten
Tinned steel enclosure, IP40 protection,
special IP65 housing on request
82 x 31 x 6 mm, weighs approx. 30 g;
with adaptor board 99 x 41 x 12 mm, approx. 50 g
Adaptor board UA73.2 (RS485 / RS422) or
Adaptor board UA77.1 (inkl. converter RS422/RS232)
Adaptor board UA103.1 (RS485, for 8 pcs. LDU)
LDU 69.1 Technisches Handbuch, Rev. 12 January 2011
Page 6 of 28
4. Communications and Getting started
4.1. Serial Interface
Communicating with the LDU 69.1 digitizer is carried out via the RS422/RS485 port.
The data format is the familiar 8/N/1 structure (8 data bits, no parity, 1 stop bit).
Available baud rates via the RS422/RS485 port are as follows: 9 600, 19 200, 38 400, 57 600 or 115 200 baud.
RS422:
Connection using a 4 wire technique
Point-to-Point connection, i.e. no bus communication possible
Half duplex setup (DX=0)
RS485:
Connection using 2- or 4-wire techniques
Multi-drop connection possible, up to 32 LDU XX.X
Half or Full Duplex (DX=0 or DX=1) possible
(RS232):
The optional adapter board UA 77.1 is available which has an RS485/RS232 converter built in.
4.2. Command Language
The command set of LDU XX.X series is based on a simple ASCII format (2 capital letters). This enables the
user to setup the device, get results or check parameters.
Example: LDU XX.X with the address or channel number 1 is connected via the RS 485 port to a bus system.
You want to get the net weight.
In this manual means: Space “_“ and Enter (CR/LF) ““
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
OP 1
OK
GN
N+123.45
Net weight with algebraic sign / floating point
The command OP_2 opens the communication channel to LDU XX.X device #2. Now device #2 acknowledges
that it is active and responds to any commands on the bus. Communication with device #2 will be closed by
another OP command (for another device on the bus e.g. OP_5) or by the command CL_2.
Each OP_X command implies a CL command to all other devices on the bus except device #X. This makes the
address structures easier and the system performance improves.
Open device #1
Device # 1 ready
Get net weight
LDU 69.1 Technisches Handbuch, Rev. 12 January 2011
Page 7 of 28
4.3. Baud Rate / Device Address
Baud Rate:
For baud rate setup use command BR, see chapter 8.9
Factory default: 9 600 baud
Device Address:
For address setup use command AD, see chapter 8.9
Factory default: Address 0
Setting the device address to 0 will set the continuously active mode, where the device becomes permanently
active, and will listen and respond to any command on the bus, without the need for an OP xxx command.
Note: The LDU XX.X series has sets of special solder pads on the under side of the PCB (see chapter 5.1). If
the solder pads are bridged then the LDU will be in a special configuration mode to set up the baud rate and
device address. This function should be used only when baud rate or address is unknown.
After power up, the LDU XX.X will enter a special baud rate search mode – waiting for a space character (0x20)
to be received. The time duration of this character is measured by the LDU and its baud rate timing will be set
accordingly – i.e. the baud rate of the terminal used will be the baud rate used by the LDU subsequently. The
device address will also be set to ”0“
4.4. Getting Started
You will require:
PC or PLC with either a RS422 or RS485 communication port
If using a PC / PLC with RS232 port, a RS422/485 to RS232 converter will be required (option UA 77.1)
Interconnecting cabling - confirm that all relevant pins are used – see the wiring diagram at the end of
this section
A load cell / scale with test weights or a load cell simulator
A 12-24 VDC power supply capable of delivering approximately 100mA for each LDU and load cell
One or more LDU 69.1
A suitable ASCII communication software *
Refer to the following wiring diagram in chapter 5.
* You can easily communicate between a PC and an LDU using programs such as Procomm, Telemate, Kermit
or HyperTerminal (included in Windows).
Also the DOP software with graphical user interface and oscilloscope function, running under Windows
2000/XP is available as freeware. This software is included on the Flintec product CD-ROM (2008 or later).
LDU 69.1 Technisches Handbuch, Rev. 12 January 2011
Page 8 of 28
.
5.
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5.2.
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5.3.
LDU 69
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.1 Technische
Adapte
s Handbuch,
UA 73.
ev. 12 Jan
(RS42
ary 2011
/ RS485 Full-/H
lf-Dupl
x)
Page 9 o
28
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