Load C Cell Digittizing Un nit Type T e LDU U 69 9.1 TECHN NICAL MANUA AL Firm mware Verssion 69.18 81.v.2.32 or higher Hardware Version 69 9.101.5.v.1 1.2x Documen nt No. G12 21 Rev12 GB G Flintec Gm mbH Bemannssbruch 9 74909 Me eckesheim GERMANY Y www.flinttec.
Table of Contents: 1. Safety Instructions .................................................................................................................................... 4 2. Declaration of Conformity ........................................................................................................................ 5 3. Introduction and Specifications ............................................................................................................... 6 4.
8.5. Taring and Zeroing Commands – SZ, RZ, ST, RT ................................................................................20 8.5.1. 8.5.2. 8.5.3. 8.5.4. 8.6. SZ RZ ST RT Set Zero ................................................................................................................................................... 20 Reset Zero Point...................................................................................................................................... 20 Set Tare ......
1. S Safety In nstructions CAUTION READ th his manual B BEFORE ope erating or serrvicing this eqquipment. FO OLLOW thesse instructions carefully. SA AVE this man nual for future reference. DO NOT alloow untrained d personnel to t operate, clea an, inspect, maintain, m serrvice, or tam mper with this equipment. ALWAYS DISCONNECT T this equipme ent from the power sourcce before cleaning or perfforming mainntenance. CA ALL FLINTEC C ENGINEERING for parts s, information n, and servic ce.
2. D Declarattion of Conform C mity 0 EG-K Konform mitätserk klärung EC-D Declarattion of Conform C mity Mona at/Jahr: month//year: 07//2010 Herste eller: Manufactturer: Flin ntec GmbH Ansch hrift: Address:: Bemannsbruch 9 74909 Meckesh heim D-7 Deu utschland / Germany Produ uktbezeichnung g: Product nam me: LDU 69.
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.
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.
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.
5. H Hardwarre and Wiring W 5.1. W Wiring 5.2. W With Unit Adapterr UA 77.1 1 (RS232 2) 5.3. W With Unit Adapterr UA 73.2 2 (RS422 2 / RS485 5 Full-/Ha alf-Duple ex) LDU 69..1 Technisches Handbuch, Rev.
5.4. 8--channel Adapto or Board UA 103.1 5.5. Terminal Configuration LDU 69 9.1 Pin no o. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 UA A 73.2 Gnd (Sh hield) +Exc + Sens + Sig – Sig – Sen – Exc Gnd NC NC + Rx - Rx - Tx + Tx NC NC NC NC + PWR Gnd UA 77..
6. Calibration and Calibration Sequence The calibration of LDU 69.1 is only possible after starting a calibration sequence (compare with chapter 8.2). Command CE: Command CM1 / CM2 /CM3: Command CI: Command MR: Command DS: Command DP: Command CZ: Command CG: Command LC: Command LN: Command ZT: Command ZR: Command ZI: Command FD : Command CS : Calibration enable – returns the current TAC value Calibrate maximum display – sets the max.
7. Commands – Overview Command AD BR CE CG CI CL CM n CS CZ DP Short description Communication: Device Address Communication: Baud Rate Calibration: Open Calibration Sequence; Read TAC Counter Calibration: Set Calibration Gain (span) at load > zero Calibration: Minimum Output Value Communication: Close Device Calibration: Set Maximum Output Value (n = 1, 2 or 3) Save the calibration data (CMn, CI, DS, DP, CZ, CG, u.a.
8. Commands Description For better clarity, all commands are divided into groups as described on the following pages. 8.1. System Diagnosis Commands – ID, IV, IS, SR Use these commands you get the LDU XX.X type, firmware version or device status. These commands are sent without parameters. 8.1.1. ID Get Device Identity Master (PC / SPS) sends ID Slave (LDU XX.X) responds D:6910 The response to this request gives the actual identity of the active device.
8.2. Calibration Commands – CE, CM n, CI, MR, DS, DP, CZ, CG, ZT, ZR, ZI, FD, LC, LN n, CS 8.2.1. CE Read TAC* Counter / Open Calibration Sequence With this command you can read the TAC counter (*TAC = Traceable Access Code) or you can open a calibration sequence. Master (PC / SPS) sends CE CE 17 Slave (LDU XX.
8.2.4. MR Set Multi-range / Multi-interval This command is only relevant, if CM 2 > 0 or CM 3 > 0. Is this the case,then this command defines, if the application is multi-range or multi-interval. Permitted values are 0 (Multi-interval) or 1 (Multi-range). Master (PC / SPS) sends MR CE CE 17 MR 1 Slave (LDU XX.
8.2.8. CG Set Calibration Gain (Span) This is the reference point for calibration under load, and is subject to TAC control. Permitted values are from 1 to 999 999. Master (PC / SPS) sends CG CE CE 17 CG 15000 Slave (LDU XX.
8.2.13. LC Clear Linearisation This command puts the LDU back to the initial factory calibration using two calibration points, zero at 0.0 mV/V and 200 000 d at 2.0 mV/V. Master (PC / SPS) sends CE CE 17 LC Slave (LDU XX.X) responds E+00017 (example) OK OK Meaning Request: TAC counter CE17 Calibration sequence active Linearize clear 8.2.14.
8.3. Motion Detection Commands – NR, NT The motion detection facility provides a means of disabling certain functions whenever a condition of instability, or “motion”, is detected. The “no-motion”, or “stable” condition is achieved whenever the signal is steady for the period of time set by NT, during which it cannot fluctuate by more than NR increments.The stable condition activates the relevant bit of responses to “Info Status” (IS).
8.4. Filter Setting Commands – FL, UR A digital filter can be set which will eliminate most of the unwanted disturbances. The command FL is used to define the digital filter settings, the command UR is used to define an averaging of up to 172 measurement values. Please note that these filters are positioned immediately after the A/D Converter and therefore affect all aspects of the weighing operation. 8.4.1.
8.5. Taring and Zeroing Commands – SZ, RZ, ST, RT The following commands allow you to set and reset the zero and tare values. The zero set up during calibration remains the ‘true zero’ but the new ‘current zero’ can be set up by using the SZ command. If the SZ command is issued and accepted then all weight values will then be based on the new ‘current zero’. Please remember that the zero value will be subject to the Zero tracking function if enabled.
8.6. Output Commands – GG, GN, GT, GS, GW The following commands “Get” the gross, net, tare and ADC sample values from the LDU 69.1. 8.6.1. GG Get Gross Value Master (PC / SPS) sends GG 8.6.2. GN Meaning Gross value: 1.100 d Get Net Value Master (PC / SPS) sends GN 8.6.3. GT Slave (LDU XX.X) responds N+01.000 Meaning Net value: 1.000 d Get Tare Value Master (PC / SPS) sends GT 8.6.4. GS Slave (LDU XX.X) responds G+01.100 Slave (LDU XX.X) responds T+00.
8.7. Synchronized Output Commands – HW, GH For systems requiring simultaneous sampling of data two commands are available: 8.7.1. HW Hold Weight Issuing the HW command, which has no parameters, will latch the current net weight in a register for later readout in all LDU’s in a common network regardless of their individual address. Note: The LDU’s will not respond to the HW command on the interface lines – it would lead to bus contention Master (PC / SPS) sends HW 8.7.2. GH Slave (LDU XX.
8.8. Auto–transmit Commands – SG, SN, SW The following commands allow the gross weight or net weight values to be continuously sent. Continuous transmission start as soon as the relevant command has been issued and finishes when any other valid command is accepted by the LDU 69.1. The data output rate will depend on the baud rate being used e.g. with a baud rate of 9 600, approximately 100 values per second can be transmitted. Note: The SG, SN and SW commands will only work if the LDU 69.
8.9. Communication Setup Commands – AD, BR, CL, DX, OP 8.9.1. AD Device Address This command can set up the device address in the value range from 0 to 255. Master (PC / SPS) sends AD AD 49 Slave (LDU XX.X) responds A:000 OK Meaning Request: Address 0 Setup: Address 49 Setting the device address to “0“ will cause the device to be permanently active, listening and responding to every command on the bus without the need for an OP command.
8.10. Save Calibration and Setup Data Commands – CS, WP The calibration and setup parameters can be divided in 2 groups: Calibration: CMn, CI, MR, DS, DP, CZ, CG, ZT, ZR, FD, LC and LNn, saved by command CS Setup: FL, FM, NR, NT, BR, AD, DX and other, saved by command WP Note: Calibration data can only be saved if the TAC code is known and precedes the CS command. See the CE and CS commands in chapter 8.2. The setup data are stored non-volatile in the EEPROM using the WP command. 8.10.1.
9. Use in “Approved” Applications The term “approved” applies whenever the weighing application is intended to be used for “legal-for-trade” weighing – that is, money will change hands according to the weight result. Such applications are bound by the legal metrology regulations of the relevant governments around the World, but most countries will comply with either the relevant EN’s (Euro Norms) or the relevant OIML (Organisation Internationale de Metrologie Legale) recommendations. The LDU 69.
10. Updates – Firmware Download For a software update the LDU xx.x amplifier has to be connected with a Windows PC via the serial interface (4-wire connection; RS485/RS422 respective RS485/RS232 converter). The solder pads SW4 on the bottom side of the PCB must be closed before switching on. After the download the solder pads must be opened again. A download is accomplished with help of our program “PROG78”. Firmware update for LDU xx.x series: First all necessary files (LduDownload.exe, progXX.
WWW.FLINTEC.COM LDU 69.1 Technisches Handbuch, Rev.
