Flintec LDU 69.1 User Manual

Load C ell Digitizing Unit

T ype LD U 69 .1

TECH NICAL MANU L

Fir ware Version 69.181.v.2.32 or higher

Hardware Version 69.101.5.v. 1.2x

Docume nt No. G12 1 Rev12 GB

Flintec G mbH Bemannsbruch 9 74909 M eckesheim GERMANY www.flintec.com

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

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	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

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1.S afety I structions

CAUTION READ t is manual B EFORE ope rating or servicing this equipment. FOLLOW the se instructions carefully. SA VE this ma ual for future reference. DO NOT allow untraine d personnel to operate, clean, inspect, maintain, service, or tamper with this equipment. ALWAYS DISCONNEC T this equipm ent from the power sourc e before cleaning or performing mai ntenance. C ALL FLINTEC ENGINEERING for part , informatio n, and servic e.

WARNING ONLY PERMIT QUA LIFIED PE SONNEL TO SERVICE THIS EQUIPMENT. EXERCISE CARE WHEN MAKING CHECKS, T ESTS AND DJUSTME NTS THAT UST BE MADE WIT H POWER O N. FAILING TO OBSERVE THESE PRECAUTIO NS CAN R ESULT IN BODILY HARM.

WARNING FOR CO NTINUED P ROTECTION AGAINST SHOCK HA ZARD CONNECT TO PROPERLY GROUNDE D OUTLET ONLY. DO NOT REMO E THE GR OUND PRO NG.

WARNING DISCON NECT ALL POWER TO THIS UNIT BEFORE R EMOVING THE FUSE OR SERVICING .

WARNING BEFOR E CONNEC TING/DISCO NNECTING ANY INTER NAL ELEC TRONIC COMPONE NTS OR INT ERCONNE CTING WIRING BETWEEN ELECTR ONIC EQUIPMENT ALWAYS R EMOVE PO WER AND W AIT AT LEA ST THIRTY (30) SECO NDS BEFO E ANY CONNECTIONS OR DI SCONNECTIONS ARE MADE. FAIL URE TO OBSERVE THE SE PRECAUTI ONS COULD RESULT I N DAMAGE TO OR DESTRUCTION OF THE EQ UIPMENT O R BODILY HARM.

CAUTION	OBSERVE PRECAU TIONS FO HANDLIN ELECTROSTATIC SENSITIVE
DEVICES.

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2.D eclaration of Confor mity

0	EG-K onform itätserk lärung
	EC-D eclaration of onform ity
Monat/Jahr: month year:		07 2010
Herst eller: Manufacturer:		Fli ntec GmbH
Ansc hrift: Address:		Bemannsbruch
		D- 4909 Meckes eim
		Deutschland / Germany
Produktbezeichnung: Product nam e:		LDU 69.1

Das b ezeichnete Produkt stimmt mit folgende n Vorschriften der Europäischen Richtlinien überein:

This p roduct confirm s with the following regulati ons of the Dire ctives of the E uropean Com munity

Richtlinie 2004/108/EG des Europäischen

Parlaments und des Rates vom 15. Dezembe r 2004 zur Angleichung de r Rechtsvors chriften der

Mitgliedstaaten üb r die elektro agnetische Vertr äglichkeit und zur Aufhebun g der Richtlinie 89/336/EWG

Richtlinie 2006/95/EG Niederspannungs-Rich tlinie

Die Absicherung aller produktsp ezifischen

Qualitätsmerkmale erfolgt auf Ba sis eines zertifizierten Qualitätsmanagement-Systems nach DIN ISO 9001.

Diese Erklärung bescheinigt die Übereinstimmung mit den genannten Richtlinien, beinhaltet jedoch keine Zusic erung von Eige nschaften.

Directive 2004/108/EC of the European Parliam nt and of the Council of 15th December 2004 on the approximation of the laws of the Memb r States relatin g to electromagnetic

co mpatibility and r pealing Directi ve 89/336/EEC

Directive 2006/95/EC Low Voltage Directive

All product-relat d features are assured by a quality sy tem in accor ance with IS O 9001.

This declaration certifies the conformity with the lis ted dir ctives, but it is o promise of c haracteristics.

Folgende Normen we rden zum Nach weis der Übereinstimmung mit den Richtlinieneingehalten:

As a proof of conformity with the directives following standards are fufilled:

OIML R-76-1

DIN EN 45501

Nicht-Selbsttätig Waagen – Metrologische und technische Anforderungen ( OIML R-76:2002 Teil 1)

Non-automatic weighing systems – Metrologi cal and technical requirements (OIML R-76:2002 Part 1)

Metrologische Aspekte nichtse lbsttätiger Waagen; DeutscheFassung EN 45 501:1992

Anhang B.3: Funktionsprüfung en unter Störeinflüssen

Anhang C: Verfahren für die Prüfung derStörfestigkeit gegen hochfrequente elektromagneti che Felder.

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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	±11 mV (bipolar; for weighing applications, force and torque
		measurements)
	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	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
	Calibration	By software via ASCII commands, sehr einfach durchführbar
	Communication interface	RS485 oder RS422; Voll-Duplex oder Halb-Duplex;
		9600 ... 115200 Baud; busfähig bis zu 32 Einheiten
	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	Tinned steel enclosure, IP40 protection,
		special IP65 housing on request
	Dimensions and weight	82 x 31 x 6 mm, weighs approx. 30 g;
		with adaptor board 99 x 41 x 12 mm, approx. 50 g
	Power supply	12 ... 24 V DC ±10 %, < 60 mA, not galvanically isolated
		Adaptor board UA73.2 (RS485 / RS422) or
	Available accesoires	Adaptor board UA77.1 (inkl. converter RS422/RS232)
		Adaptor board UA103.1 (RS485, for 8 pcs. LDU)
	EMC	OIML R-76:2006 and DIN EN 45 501:1992/AC1993

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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		Open device #1
	OK	Device # 1 ready
GN		Get net weight
	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.

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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).

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5.H ardwar e and Wiring

5.1.W iring

5.2. W ith Unit Adapter UA 77. (RS232)

5.3.W ith Unit Adapter UA 73. (RS422 / RS485 Full-/Ha lf-Duple x)

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