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Summary of Contents for LAUMAS WLIGHT
- Page 1 Installation and User Manual version 1.00 WLIGHT 2014/30/EU EN55022:2010 EN61000-6-2:2005 EN61000-6-4:2007 SYSTEM IDENTIFICATION Load Cell Systems reserves the right to change specifications without notice. ©2019 Web: https://loadcellsys.com Email: sales@loadcellsys.com Phone: 607-426-1467...
- Page 2 No guarantee is applicable on returned products without the original label and/or serial number. No guarantee against misuse. Batteries: Laumas provides 1 year guarantee from the date of delivery note, against material defects or battery manufacturing faults. DISPOSAL...
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Page 3: Table Of Contents
TABLE OF CONTENTS USER WARNINGS ......................... 1 RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS . 1 RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS ....1 LOAD CELL INPUT TEST (QUICK ACCESS) ................. 4 LOAD CELL TESTING ......................4 MAIN SPECIFICATIONS OF THE INSTRUMENT..............5 BUFFER BATTERY ........................ - Page 4 PIECE COUNTER ........................ 24 INCREASING OPERATION ....................24 DECREASING OPERATION ....................24 DISPLAY AND OPERATION ....................24 TOTALIZER ......................... 25 SELECT TOTALIZER OPERATING MODE ................25 DISPLAY AND OPERATION ....................26 ALARMS ..........................27 PRINTING EXAMPLES ......................28 CONTINUOUS FAST WEIGHT TRANSMISSION PROTOCOL ........... 29 CONTINUOUS WEIGHT TRANSMISSION TO REMOTE DISPLAYS PROTOCOL .....
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Page 5: User Warnings
USER WARNINGS RECOMMENDATIONS FOR THE PROPER USE OF WEIGHING INSTRUMENT Keep away from heat sources and direct sunlight Repair the instrument from rain (except special IP versions) Do not wash with water jets (except special IP versions) Do not dip in water Do not spill liquid on the instrument Do not use solvents to clean the instrument Do not install in areas subject to explosion hazard (except special Atex versions) - Page 6 INSTALLING LOAD CELLS The load cells must be placed on rigid, stable in-line structures; it is important to use the mounting modules for load cells to compensate for misalignment of the support surfaces. CONNECTING SEVERAL CELLS IN PARALLEL Connect several cells in parallel by using - if necessary - a watertight junction box with terminal box. The cell connection extension cables must be shielded, led individually into their piping or conduit and laid as far as possible from the power cables (in case of 4-wire connections, use cables with 4x1 mm...
- Page 7 EARTHING THE WEIGHED STRUCTURE By means of a copper wire with suitable cross-section, connect the cell upper support plate with the lower support plate, then connect all the lower plates to a single earthing system. Electrostatic charges accumulated because of the product rubbing against the pipes and the weighed container walls are discharged to the ground without going through or damaging the load cells.
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Page 8: Load Cell Input Test (Quick Access)
LOAD CELL INPUT TEST (QUICK ACCESS) From the weight display, press for 3 seconds; the response signal of the load cells is displayed, expressed in mV with four decimals. LOAD CELL TESTING Load cell resistance measurement (use a digital multimeter): - Disconnect the load cells from the instrument and check that there is no moisture in the cell junction box caused by condensation or water infiltration. -
Page 9: Main Specifications Of The Instrument
Real-time clock/calendar with buffer battery. A RS232 serial port for connection to: PC/PLC up to 32 instruments (max 99 with line repeaters) by ASCII Laumas or ModBus R.T.U. protocols, remote display, printer. 24 VDC/1 A stabilized power supply included. Designed to operate with 8 NiMH rechargeable batteries, 1.2 V, AA type (not included). -
Page 10: Technical Specifications
TECHNICAL SPECIFICATIONS POWER SUPPLY and CONSUMPTION 12/24 VDC ±10%; 6 W (standard) NO. OF LOAD CELLS IN PARALLEL and SUPPLY max 8 (350 ohm); 5 VDC / 120 mA LINEARITY < 0.01% F.S. THERMAL DRIFT < 0.0005% F.S./°C A/D CONVERTER 24 bit (16000000 points) MAX DIVISIONS ±999999... -
Page 11: Electrical Connections
ELECTRICAL CONNECTIONS BASIC INFORMATION - It is possible to supply up to eight 350 ohm load cells or sixteen 700 ohm load cells. - For 4-wire load cells, make a jumper between EX- and REF- and between EX+ and REF+. KEY CONNECTORS Connector Signal... -
Page 12: Keys And Led Functions
KEYS AND LED FUNCTIONS KEYS Short press Long press (3 s) Into menus Cancel or return to Semi-automatic zero Tare resetting previous menu Select figure to be Gross Net Net Gross modified or go to previous menu item. If ... - Page 13 Function net weight (semi-automatic tare or preset tare) zero (deviation from zero not more than ±0.25 divisions) stability unit of measure: kg unit of measure: g not used Into menus LEDs light up in sequence to indicate that it is not displaying a weight. - 9 -...
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Page 14: Menu Map
MENU MAP Into menus changes are applied right after pressing the ENTER key ( no further confirmation is required). SYSTEM PARAMETERS ... -
Page 15: Instrument Commissioning
INSTRUMENT COMMISSIONING Use the POWER button to turn the device on or off. Upon switch-on, the display shows in sequence: - → (ONLY in case of approved program); - instrument model (e.g.: ); - followed by the software code (e.g.: ); - program type: ... -
Page 16: Programming Of System Parameters
PROGRAMMING OF SYSTEM PARAMETERS From the weight display, press simultaneously keys MENU and ESC to access the parameter setting. MENU/ENTER: to enter a menu/confirm the data entry. to modify the displayed figure or menu item. to select a new figure or modify the displayed menu item. ESC: to cancel and return to the previous menu. -
Page 17: Maximum Capacity
MAXIMUM CAPACITY : maximum displayable weight (from 0 to max full scale; default: 0). When the weight exceeds this value by 9 divisions, the display shows . To disable this function, set 0. TARE WEIGHT ZERO SETTING ... -
Page 18: Real Calibration (With Sample Weights)
REAL CALIBRATION (WITH SAMPLE WEIGHTS) After having performed the THEORETICAL CALIBRATION and TARE WEIGHT ZERO SETTING, this function allows correct calibration to be done using sample weights of known value and, if necessary, any deviations of the indicated value from the correct value to be corrected. -
Page 19: Filter On The Weight
FILTER ON THE WEIGHT Setting this parameter allows a stable weight display to be obtained. To increase the effect (weight more stable) increase the value (from 0 to 9, default 4). As seen in the diagram: - By confirming the message, the currently programmed filter value is displayed. - By changing and confirming the value, the weight is displayed and it will be possible to experimentally verify its stability. -
Page 20: Zero Parameters
ZERO PARAMETERS RESETTABLE WEIGHT SETTING FOR SMALL WEIGHT CHANGES (from 0 to max full scale; default: 300; considered decimals: 300 – 30.0 – 3.00 – 0.300): this parameter indicates the maximum weight value resettable by external contact, keypad or serial protocol. -
Page 21: Setting Units Of Measure
SETTING UNITS OF MEASURE These are the available units of measure: kilograms : grams : tons : pounds* : : newtons* litres* : bars* : atmospheres* : : pieces* : newton metres* : kilogram metres* : other generic units of measure not included in the list. If the print function is enabled, the symbol corresponding to the selected unit of measure will be printed after the measured value. -
Page 22: Semi-Automatic Tare (Net/Gross)
SEMI-AUTOMATIC TARE (NET/GROSS) THE SEMI-AUTOMATIC TARE OPERATION IS LOST UPON INSTRUMENT POWER- OFF. To perform a net operation (SEMI-AUTOMATIC TARE), press the TARE key for less than 3 seconds. The instrument displays the net weight (just set to zero) and the NET LED lights up. To display the gross weight again, press TARE for 3 seconds. -
Page 23: Semi-Automatic Zero (Weight Zero-Setting For Small Variations)
By default the instrument shows the last programmed preset tare value: to apply it press ENTER. After setting the tare value, going back to the weight display, the display shows the net weight (subtracting the preset tare value) and the NET LED lights up to show that a tare has been entered. To delete a preset tare and return to gross weight display, hold down TARE for about 3 seconds. -
Page 24: Serial Communication Setting
SERIAL COMMUNICATION SETTING - : communication port. - : it disables any type of communication (default). - : MODBUS-RTU protocol; possible addresses: from 1 to 99 (see section MODBUS-RTU PROTOCOL). - : ASCII bidirectional protocol; possible addresses: from 1 to 99 (see section ASCII BIDIRECTIONAL PROTOCOL). -
Page 25: Rs232 Serial Communication
RS-232 port in the following manner: This type of connection allows A SINGLE instrument to be used in a ONE WAY mode. RECEIVE TRANSMIT WLIGHT RS232 WLIGHT RS232 ← RS485 –... -
Page 26: Test
TEST - Millivolt Test: : displays the load cell response signal in mV with four decimals. BATTERY OPERATION The instrument is designed to operate with 8 NiMH rechargeable batteries, 1.2 V, AA type (not included). - Use the functions of the menu to optimize battery lifetime (see section ENERGY SAVING). -
Page 27: Energy Saving
The battery case is already connected. If during the insertion of the batteries the case should come out from the board (or if the battery operation should have problems), reconnect the case to the instrument by using the connector shown in the figure below. ENERGY SAVING ... -
Page 28: Piece Counter
PIECE COUNTER Weight has to be set to zero before selecting operation type. INCREASING OPERATION - Load the empty container on the scale; - press TARE to display zero (net weight); - press START, select and confirm with ENTER, appears on the display; - insert sample pieces in the container and press ENTER;... -
Page 29: Totalizer
In piece counter mode you can: - set weight to zero for small variations (press and confirm with ENTER); - set semi-automatic tare (press TARE); - do a new sampling: press START for 3 seconds, appears, press ENTER, set number of pieces on scale and confirm with ENTER;... -
Page 30: Display And Operation
DISPLAY AND OPERATION Based on selection set the total weight on scale is displayed: - Fast manual totalization: preceded by the letter (e.g.: ); - Normal manual totalization: preceded by the letter (e.g.: ); - Automatic totalization: preceded by the letter (e.g.: ); Press PRINT to store and print weight values and number of weighing (), see section PRINTING EXAMPLES. -
Page 31: Alarms
ALARMS the load cell is not connected or is incorrectly connected; the load cell signal exceeds : 39 mV; the conversion electronics (AD converter) is malfunctioning; the load cell is a 4- wire and there are no jumpers between EX- and REF- and between EX+ and REF+. ... -
Page 32: Printing Examples
PRINTING EXAMPLES If the printer has been set (see section SERIAL COMMUNICATION SETTINGS), from the weight display press the PRINT key: BASIC PRINTOUT: ::::::::::::::::::::::: WLGT Addr:01 DATE: 23/03/18 14:48:12 GROSS 1204 kg 831 kg TARE 373 kg PIECE COUNTER PRINTOUT: ::::::::::::::::::::::: WLGT Addr:01... -
Page 33: Continuous Fast Weight Transmission Protocol
CONTINUOUS FAST WEIGHT TRANSMISSION PROTOCOL This protocol allows the continuous transmission of the weight at high update frequencies. Up to 300 strings per second are transmitted with a minimum transmission rate of 38400 baud. Following communication modes availables (see section SERIAL COMMUNICATION SETTINGS): ... -
Page 34: Continuous Weight Transmission To Remote Displays Protocol
CONTINUOUS WEIGHT TRANSMISSION TO REMOTE DISPLAYS PROTOCOL This protocol allows the continuous weight transmission to remote displays. The communication string is transmitted 10 times per second. Following communication modes availables (see section SERIAL COMMUNICATION SETTINGS): - : communication with RIP5/20/60, RIP50SHA, RIPLED series remote displays; the remote display shows the net weight or gross weight according to its settings - : communication with RIP6100, RIP675, RIP6125C series remote displays;... -
Page 35: Ascii Bidirectional Protocol
ASCII BIDIRECTIONAL PROTOCOL The instrument replies to the requests sent from a PC/PLC. It is possible to set a waiting time for the instrument before it transmits a response (see parameter in the SERIAL COMMUNICATION SETTINGS section). Following communication modes availables (see section SERIAL COMMUNICATION SETTINGS): - : communication compatible with instruments series W60000, WL60 Base, WT60 Base, TLA600 Base - ... -
Page 36: Semi-Automatic Zero (Weight Zero-Setting For Small Variations)
Error messages: in case of an instrument alarm for exceeding 110% of the full scale or 9 divisions above the value of the parameter , the instrument sends the string: &aassO-Lst\ckck in case of faulty connection of the load cells or of another alarm, the instrument sends: &aassO-Fst\ckck where: s .... -
Page 37: Switching From Net To Gross Weight
SWITCHING FROM NET TO GROSS WEIGHT The PC transmits the ASCII string: $aaDckckCR Possible instrument responses: - correct reception: &aaxy\ckckCR - incorrect reception: &&aa?\ckckCR where: x ....number of decimals y = 3 ..... for division value = 1 y = 4 ..... for division value = 2 y = 5 ..... -
Page 38: Real Calibration (With Sample Weight)
REAL CALIBRATION (WITH SAMPLE WEIGHT) After the tare zero-setting, this function allow the operator to check the calibration obtained by using sample weights and correct automatically any change between the displayed value and the actual one. Load onto the weighing system a sample weight, which must be at least 50% of the full scale, or make so that that the instrument measures a corresponding mV signal. -
Page 39: Check-Sum Calculation
CHECK-SUM CALCULATION The two ASCII characters (ckck) are the representation of a hexadecimal digit in ASCII characters. The check digit is calculated by executing the operation of XOR (exclusive OR) of 8-bit ASCII codes of only the string underlined. The procedure to perform the calculation of check-sum is the following: - Consider only the string characters highlighted with underlining - Calculate the exclusive OR (XOR) of 8-bit ASCII codes of the characters Example:... -
Page 40: Modbus-Rtu Protocol
MODBUS-RTU PROTOCOL The MODBUS-RTU protocol allows the management of the reading and writing of the following registries according to the specifications found on the reference document for this Modicon PI- MBUS-300 standard. To select the MODBUS-RTU communication see SERIAL COMMUNICATION SETTINGS section. Check if the master MODBUS-RTU in use (or the development tool) requires the disclosure of registers based on 40001 or 0. - Page 41 Interrogation frequency is linked to the communication speed set (the instrument stands by for at least 3 bytes before starting calculations an eventual response to the interrogation query). The parameter present in the SERIAL COMMUNICATION SETTING section, allows the instrument to respond with a further delay and this directly influences the number of interrogations possible in the unit of time.
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Page 42: Communication Error Management
COMMUNICATION ERROR MANAGEMENT The communication strings are controlled by way of the CRC (Cyclical Redundancy Check). In case of communication error the slave will not respond with any string. The master must consider a time-out for reception of the answer. If it does not receive an answer it deduces that there has been a communication error. -
Page 43: List Of Available Registers
LIST OF AVAILABLE REGISTERS The MODBUS-RTU protocol implemented on this instrument can manage a maximum of 32 registers read and written in a single query or response. R ....the register may only be read W ....the register may only be written R/W .... - Page 44 STATUS REGISTER (40007) Bit 0 Load cell error Bit 1 AD convertor malfunction Bit 2 Maximum weight exceeded by 9 divisions Bit 3 Gross weight higher than 110% of full scale Bit 4 Gross weight beyond 999999 or less than -999999 Bit 5 Net weight beyond 999999 or less than -999999 Bit 6...
- Page 45 DIVISIONS AND UNITS OF MEASURE REGISTER (40014) This register contains the current setting of the divisions (parameter ) and of the units of measure (parameter ). H Byte L Byte Unit of measure Division Least significant byte (L Byte) Most significant byte (H Byte) Unit of Coefficient effect...
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Page 46: Possible Commands To Be Sent To The Command Register (40006)
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER (40006) No command SEMI-AUTOMATIC TARE enabling (net weight displaying) SEMI-AUTOMATIC ZERO SEMI-AUTOMATIC TARE disabling (gross weight displaying) Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Keypad lock Keypad and display unlock Keypad and display lock Save data in EEPROM TARE WEIGHT ZERO SETTING for... -
Page 47: Communication Examples
COMMUNICATION EXAMPLES The numerical data below are expressed in hexadecimal notation with prefix h. EXAMPLE 1 Command for multiple writing of registers (command 16, h10 hexadecimal): Assuming that we wish to write the value 0 to the register 40037 and the value 2000 to the register 40038, the string to generate must be: h01 h10 h00 h24 h00 h02 h04 h00 h00 h07 hD0 hF3 hE8 The instrument will respond with the string:... - Page 48 EXAMPLE 2 Multiple commands reading for registers (command 3, h03 hexadecimal): Assuming that we wish to read the gross weight value (in the example 4000) and net weight value (in the example 3000), reading from address 40008 to address 40011 must be performed by sending the following string: h01 h03 h00 h07 h00 h04 hF5 hC8 The instrument will respond with the string:...
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Page 49: Reserved For The Installer
RESERVED FOR THE INSTALLER MENU LOCKING Through this procedure, it’s possible to block the access to any menu on the instrument. Select the menu that you wish to lock: press ESC and simultaneously for 3 seconds, the display shows ... -
Page 50: Keypad Or Display Locking
Upon instrument power-on hold down the ESC key until the display shows , then proceed as follows: CONSTANTS RESTORE (does not erase the calibration): confirm , use arrow keys to select , set code 6935 and confirm. PROGRAM SELECTION: confirm and use the arrow keys to select the desired program: : basic program.
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