LCD C-DESK-BR User manual

GC-DESK-BR/BL
GC-TAB-BR/BL
Laboratorio Metrologico LCD Srl
Pesatura industriale
Via Generale Nastri, 23
84098 Lancusi (SA)
[phone]
[phone]
[phone]
ASSISTENZA
[email protected]
www.bilanciailcd.it
HELP DESK
User Manual
version 1.05
Weighbridge
2014/108/EC
EN55022:2010 EN61000-6-2:2005 EN61000-6-4:2007
APPROVED - EN45501-2015-2014/31/EC-OIML R76:2006
English

SYMBOLS
Here are the symbols used in the manual to draw the reader's attention:
Caution! Risk of electric shock.
Caution! This operation must be performed by skilled personnel.
Pay particular attention to the following instructions.
Further information.
WARRANTY
24 months from the date of the delivery note. Warranty covers only failures of defective components (due to construction
defects or defects in materials) and includes replacement or repair of the components and related labor costs.
Warranty is automatically forfeited in the event of:
- tampering, deletion, removal of the identification label and/or serial number of the product
- misuse, transformation, alteration, repair of products not carried out by Laumas personnel
Laumas provides a 1-year warranty from the date of the delivery note on defects in material or manufacture of the battery.
GUIDELINES FOR PROPER DISPOSAL
This symbol on the product or packaging indicates that:
-This is electrical/electronic equipment and cannot be disposed of as municipal solid waste, but must be delivered
to a recycling center
-Improper use or disposal can pollute the environment or damage human health
-Non-compliance with these guidelines will be penalized in accordance with the regulations in force in the country
of destination
-It is recommended to dispose of the packing and packaging as required by local regulations

TABLE OF CONTENTS
USER WARNINGS ................................................................................................................... 1
RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS ... 1
RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS ................ 2
LOAD CELL INPUT TEST (QUICK ACCESS) .......................................................................... 4
LOAD CELL TESTING ............................................................................................................... 4
MAIN SPECIFICATIONS OF THE INSTRUMENT ................................................................... 5
BUFFER BATTERY .................................................................................................................... 6
AFTER A BLACKOUT ............................................................................................................. 6
TECHNICAL SPECIFICATIONS .............................................................................................. 7
KEY, LED AND SYMBOLS FUNCTIONS ................................................................................ 8
MENU MAP ............................................................................................................................ 11
SYSTEM PARAMETERS ......................................................................................................... 11
DISPLAY VISUALIZATIONS UPON INSTRUMENT SWITCH-ON ........................................ 12
PROGRAMMING OF SYSTEM PARAMETERS .................................................................... 12
FILTER ON THE WEIGHT ....................................................................................................... 12
ANTI PEAK ........................................................................................................................................ 13
ALIBI MEMORY (ONLY FOR INSTRUMENTS WHERE THIS OPTION IS AVAILABLE) ...... 14
ALIBI MEMORY READING ............................................................................................................... 14
OUTPUTS AND INPUTS CONFIGURATION .......................................................................... 15
SEMI-AUTOMATIC TARE (NET/GROSS) ............................................................................... 17
PRESET TARE (SUBTRACTIVE TARE DEVICE) ................................................................... 17
SEMI-AUTOMATIC ZERO (WEIGHT ZERO-SETTING FOR SMALL VARIATIONS) ............ 18
SERIAL COMMUNICATION SETTING .................................................................................... 19
RS232 SERIAL COMMUNICATION ................................................................................................. 21
RS485 SERIAL COMMUNICATION ................................................................................................. 21
DIRECT CONNECTION BETWEEN RS485 AND RS232 WITHOUT CONVERTER ...................... 21
CONNECTION WITH TM-U295 / LX-300 ......................................................................................... 22
WEIGHINGS STORAGE AND PRINTING CONDITIONS ........................................................ 22
TEST ......................................................................................................................................... 22
ENERGY SAVING .................................................................................................................... 23
DATE AND TIME SETTING ..................................................................................................... 23
INFO MENU .............................................................................................................................. 24
SETPOINT ................................................................................................................................ 25
PROGRESSIVE PRINTOUTS, TOTALS, OPEN WEIGHINGS .............................................. 25
PROGRESSIVE PRINTOUTS .................................................................................................. 25
TOTALS .................................................................................................................................... 26
OPEN WEIGHINGS .................................................................................................................. 26
LORRY DATABASE ............................................................................................................... 27
DATABASE MODIFICATION ................................................................................................... 27
PASSWORD ON THE DATABASE ......................................................................................... 27

OPERATION ........................................................................................................................... 28
DOUBLE WEIGHING (ENTRY/EXIT) ....................................................................................... 28
1. FIRST WEIGHING (ENTRY) ......................................................................................................... 28
2. SECOND WEIGHING (EXIT) ........................................................................................................ 28
SINGLE WEIGHING ................................................................................................................. 29
SINGLE WEIGHING WITHOUT USING THE DATABASE .............................................................. 29
SINGLE WEIGHING USING THE DATABASE ................................................................................ 29
DOUBLE WEIGHING (ENTRY/EXIT) WITH TRAILER ............................................................ 30
1. FIRST WEIGHING OF THE TRACTOR (ENTRY) ........................................................................ 30
2. FIRST WEIGHING OF THE TRAILER (ENTRY) .......................................................................... 30
3. SECOND WEIGHING OF THE TRACTOR (EXIT) ....................................................................... 30
4. SECOND WEIGHING OF THE TRAILER (EXIT) ......................................................................... 31
SINGLE WEIGHING WITH TRAILER ...................................................................................... 32
SINGLE WEIGHING WITHOUT USING THE DATABASE .............................................................. 32
SINGLE WEIGHING USING THE DATABASE ................................................................................ 33
MULTIPLE WEIGHING ............................................................................................................ 34
1. FIRST MULTIPLE WEIGHING ...................................................................................................... 34
2. SUBSEQUENT WEIGHINGS ........................................................................................................ 34
3. WEIGHING CLOSING ................................................................................................................... 34
SIGNAL STATION .................................................................................................................... 35
ALARMS ................................................................................................................................. 35
PRINTING EXAMPLES .......................................................................................................... 37
WEIGHING PRINTOUTS .......................................................................................................... 37
COMPLEX FUNCTIONS PRINTOUTS .................................................................................... 38
OTHER PRINTOUTS ................................................................................................................ 40
CONTINUOUS FAST WEIGHT TRANSMISSION PROTOCOL ............................................ 41
CONTINUOUS WEIGHT TRANSMISSION TO REMOTE DISPLAYS PROTOCOL ............. 42
ASCII BIDIRECTIONAL PROTOCOL .................................................................................... 43
1. SETPOINT PROGRAMMING .......................................................................................... 43
1.1. SETPOINT STORAGE IN EEPROM MEMORY .................................................................... 44
2. READING WEIGHT OR SETPOINT FROM PC .............................................................. 44
3. SEMI-AUTOMATIC ZERO (WEIGHT ZERO-SETTING FOR SMALL VARIATIONS) .... 45
4. SWITCHING FROM GROSS TO NET WEIGHT ............................................................. 45
5. SWITCHING FROM NET TO GROSS WEIGHT ............................................................. 45
6. READING OF DECIMALS AND DIVISION NUMBER .................................................... 46
7. KEYPAD LOCK (BLOCK THE ACCESS TO THE INSTRUMENT) ................................ 46
8. KEYPAD UNLOCK .......................................................................................................... 46
9. DISPLAY AND KEYPAD LOCK ...................................................................................... 47
10. CHECK-SUM CALCULATION ........................................................................................ 47
MODBUS-RTU PROTOCOL .................................................................................................. 48
FUNCTIONS SUPPORTED IN MODBUS ................................................................................ 48
COMMUNICATION ERROR MANAGEMENT ......................................................................... 50
LIST OF AVAILABLE REGISTERS ......................................................................................... 50
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER (40006) ............... 55

ALIBI MEMORY OPERATION CONTROLS .................................................................................... 55
COMMUNICATION EXAMPLES .............................................................................................. 57
OPTIONS ................................................................................................................................ 60
OPZWTABSTA: PLUSII INTEGRATED PRINTER .................................................................. 60
OPZWTABSTAVQ: STAVQ INTEGRATED PRINTER ............................................................ 62
OPZWBATTWTAB ................................................................................................................... 63
CONNECTING THE BATTERY TO THE INSTRUMENT ................................................................. 63
WINOX-BR, WTAB-BR ..................................................................................................................... 64
WINOX-BL, WTAB-BL ...................................................................................................................... 64
OPZWBATTWDESK ................................................................................................................ 65
CONNECTING THE BATTERY TO THE INSTRUMENT ................................................................. 65
WDESK-BR ....................................................................................................................................... 66
WDESK-BL ........................................................................................................................................ 66
INFORMATION ON TYPE-APPROVED INSTRUMENTS IN THE EUROPEAN UNION ....... 67
DECLARATION OF CONFORMITY - EU ............................................................................... 68

- 1 -
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)
RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS
The terminals indicated on the instrument’s wiring diagram to be connected to earth must
have the same potential as the weighed structure (same earthing pit or earthing system). If
you are unable to ensure this condition, connect with an earthing wire the terminals of the
instrument (including the terminal –SUPPLY) to the weighed structure.
The cell cable must be individually led to its panel input and not share a conduit with other cables;
connect it directly to the instrument terminal strip without breaking its route with support terminal strips.
Use “RC” filters on the instrument-driven solenoid valve and remote control switch coils.
Avoid inverters in the instrument panel; if inevitable, use special filters for the inverters and separate
them with sheet metal partitions.
The panel installer must provide electric protections for the instruments (fuses, door lock switch etc.).
It is advisable to leave the equipment always switched on to prevent the formation of condensation.
MAXIMUM CABLE LENGTHS
-RS485: 1000 metres with AWG24, shielded and twisted cables
-RS232: 15 metres for baud rates up to 19200
-Analog current output: up to 500 metres with 0.5 mm2 cable
-Analog voltage output: up to 300 metres with 0.5 mm2 cable

- 2 -
RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS
SIZING OF LOAD CELLS CAPACITY
For safety reasons, in case of static weighing, it is advisable to use the load cells at a maximum of
70-80% of its nominal capacity (assuming that the load is uniformly distributed over the entire
weighed structure); depending on the handling mode of the load to weigh, consider to further reduce
the % of load with respect to the nominal capacity (ex.: forklifts handling, bridge cranes, etc.).
In case of weighing with dynamic loads, the installer has to estimate the thrust speed, the
acceleration, the frequency, etc.
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.
PROTECTION OF THE CELL CABLE
Use water-proof sheaths and joints in order to protect the cables of the cells.
MECHANICAL RESTRAINTS (pipes, etc.)
When pipes are present, we recommend the use of hoses and flexible couplings with open
mouthpieces with rubber protection; in case of hard pipes, place the pipe support or anchor bracket as
far as possible from the weighed structure (at a distance at least 40 times the diameter of the pipe).
WELDING
Avoid welding with the load cells already installed. If this cannot be avoided, place the welder ground
clamp close to the required welding point to prevent sending current through the load cell body.
WINDY CONDITIONS - KNOCKS – VIBRATIONS
The use of weigh modules is strongly recommended for all load cells to compensate for
misalignment of the support surfaces. The system designer must ensure that the plant is protected
against lateral shifting and tipping relating to: shocks and vibration; windy conditions; seismic
conditions in the installation setting; stability of the support structure.

- 3 -
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. Failure to
implement a proper earthing system might not affect the operation of the weighing system; this,
however, does not rule out the possibility that the cells and connected instrument may become
damaged in the future. It is forbidden to ensure earthing system continuity by using metal parts
contained in the weighed structure.
FAILURE TO FOLLOW THE INSTALLATION RECOMMENDATIONS WILL BE CONSIDERED
A MISUSE OF THE EQUIPMENT

- 4 -
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. If so, drain the system or replace it if
necessary.
-The value between the positive signal wire and the negative signal wire must be equal or similar
to the one indicated in the load cell data sheet (output resistance).
-The value between the positive excitation wire and the negative excitation wire must be equal or
similar to the one indicated in the load cell data sheet (input resistance).
-The insulation value between the shield and any other cell wire and between any other cell wire
and the body of the load cell must be higher than 20 Mohm.
Load cell voltage measurement (use a digital multimeter):
-Take out the load cell to be tested from underneath the container, or alternatively, lift the
container support.
-Make sure that the excitation of two wires of the load cell connected to the instrument (or
amplifier) is 5 VDC ±3%.
-Measure the response signal between the positive and the negative signal wires by directly
connecting them to the tester, and make sure that it is comprised between 0 and ±0.5 mV.
-Apply load to the cell and make sure that there is a signal increment.
IF ONE OF THE ABOVE CONDITIONS IS NOT MET, PLEASE CONTACT THE TECHNICAL
ASSISTANCE SERVICE.


3 s

- 5 -
MAIN SPECIFICATIONS OF THE INSTRUMENT
Indicator with 6-wire load cell input installable on table (WDESK model: panel front, wall or column
mounting); 19-key membrane keypad, with buzzer, real-time clock/calendar with buffer battery.
Three serial ports (one RS232 and two RS485) for connection to: PC/PLC up to 32 instruments
(max 99 with line repeaters) by ASCII Laumas or ModBus R.T.U. protocol, remote display, printer.
The instrument may manage:
- up to 254 simultaneous lorries.
- up to 10000 weighings that can be saved in alibi memory (optional);
- up to 999 Preset Tares retrievable via a numeric code.
The instrument can be connected to a CLM serie intelligent junction box or to a multi-channel weight
transmitter.
Display:
Model
Display
Digit height
LED or signalling
symbols
WDESK-BR
WINOX-BR
WTAB-BR
Red LED, 6 digits, 7 segments,
semi-alphanumeric
20 mm
16
WDESK-BL
WINOX-BL
WTAB-BL
Backlit LCD, 6 digits, 7 segments,
semi-alphanumeric
20 mm
max 46
Dimensions:
WDESK
Version
Max. encumbrance
Drilling
D – D-Sub connector
IP40 protection rating
Front panel IP67 protection rating
Power supply included
122x226x189 mm
(connectors included)
96x186 mm
Wall installation with bracket
(can also be installed on table)
122x230x250 mm
approx.
(bracket included)
WINOX
Type of connectors
Max. encumbrance
D – D-Sub connector (table)
IP40 protection rating
Front panel IP68 protection rating
Power supply included
206x286x85 mm
(connectors included)