LEON ENGINEERING LD5204 06 Weight Indicator Technical Manual
The LD5204 06 is a compact microcontroller-based unit designed for use with strain gauge load cells. It offers features like high accuracy analog to digital converter, front panel display, 8 membrane keys with tactile feedback, and non-volatile memory for system parameters and calibration data.
Advertisement
Advertisement
Technology and reliability that carries weight
ELECTRONIC WEIGHT INDICATOR
MODEL LD5204-06
TECHNICAL MANUAL
HEAD OFFICE:
41, Arkadias Str, 11527 Athens, GREECE
Tel: +30 1 7770 936, 7702998, Fax: 7758925
THE NETHERLANDS (International Operations):
Paardeweide 11A, 4824 EH Breda, The Netherlands
Tel: +31 76 543 05 01, Fax: +31 76 543 05 02
Email address: [email protected]
9 If you have any questions…
Email address:
[email protected]
9 If you want to visit us…
http://www.leon-engineering.com
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
1 of 28
Technology and reliability that carries weight
TABLE OF CONTENTS
PAGE
1 INTRODUCTION.........................................................................................................................................3
2 INSTALLATION ..........................................................................................................................................4
2.1
Mounting ................................................................................................................................................4
3
5
6
7
8
9
ANNEX A containing installation schematic drawings and connector pin outs comprises of 12 pages.
This manual contains proprietary information, protected by international copyright laws. No part of this document maybe reproduced without the written agreement of the publisher, LEON ENGINEERING.
The information herein is believed to be both accurate and reliable. LEON ENGINEERING, however, would be obliged to be informed if any errors occur. LEON ENGINEERING cannot accept any liability for direct or indirect damages resulting from the use of this manual.
LEON ENGINEERING reserves the right to revise this manual and alter its content without notification at any time.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
2 of 28
Technology and reliability that carries weight
1 INTRODUCTION
The electronic weight indicator model LD 5204-06 series is a compact microcontroller based unit specifically designed for use on systems utilizing strain gauge load cells.
3.
4.
5.
6.
7.
The standard configuration includes:
1.
2.
8.
9.
10.
11.
High accuracy analog to digital converter (max 550.000 internal counts).
Front panel with 6 digits, 7 segment, LED red (20 mm) plus 8 annunciators (LD 5204) or 6 digits,7 segments, LCD display black (16 mm) plus 5 annunciators (LD 5206)
8 membrane keys with tactile feedback.
Non volatile memory for system parameters and calibration data.
Non volatile memory for storage of 10.000 weights (Electronic tally roll or Alibi memory).
Serial port RS232C adapter for printing weighing data on a serial printer or host computer.
2 setpoints 24VDC/100mA optoisolated and 1 optoisolated input.
The microcontroller technology allows the instrument to perform in software all measuring functions, operator input-output, automatic controls and sequences necessary for the operation of weighing systems.
The setting of the unit is done through a guided keyboard operation, enabling the adaptation to operating environment and system requirements.
A totaliser and counter is available that may be viewed or printed.
Several print formats are available selectable in setup.
A piece count facility is also offered with selectable sample size is included in the standard software.
OPTIONS a. b. c.
RS485 serial port adapter for bi-directional communication with a host computer.
2 nd
analog load cell input board (PCB765).
Analogue output 0/4 - 20mA or 0-10V, 16 bits resolution. (PCB 761) remotely powered.
EXTENT OF SUPPLY
A.
The standard supply includes:
- The connection plug for the load cell cable and peripherals.
- 230VAC to 9VDC/700mA, mains power adapter.
- User manual.
B. Prior to unpacking the equipment, examine the carton for exterior shipping damage and if any notify the carrier immediately.
Remove the equipment from the carton and plastic bag.
Inspect extent of supply for any sign of damage.
Save packaging material.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
3 of 28
Technology and reliability that carries weight
2 INSTALLATION
2.1
Mounting
The mounting location must be such that the instrument is not subject to excessive vibrations, heat or humidity.
Avoid direct sunlight on the front of the instrument. The unit has to be installed at the right height to allow an easy reading of the display and keyboard operation.
2.2
Wiring
Use load cell cable 6 x 0,5 mm
2 shielded for the sensor. Use 3 x 0,34 mm
2
shielded for RS232C connection and 2x0,34 mm
2
twisted pair and shielded for RS485 connection. .
Table top
All connections to the instrument are made through the rear panel connectors. Strain reliefs are supplied with the connectors. The shield should be connected to the metal frame of the connector.
Stainless steel
-Remove the rear panel and lift it carefully.
-Insert cables via the cable glands. Strip and connect cables according to connector diagram in Annex A.
-Connect the shields of the cables between the plastic part and metal case of cable glands or on screws supporting
the pcb’s.
-Re-install the rear panel.
2.3
Power
The instrument is powered from external power supply (9-15VDC/500mA) or battery.
As the instrument is computer controlled it requires clean power for reliable operation.
Power supplied should come from a source that is isolated from other process equipment.
A main adapter 9VDC/500mA is recommended for operation.
2.4
Load cells
CONNECTION :
MAX. CABLE :
UTILISATION :
CONVERSION :
RATE
Connect according to the junction box drawing.
300m/ cross sectional area of cable (mm
2
).
A -0.25 to 2.0 mV/V range is permitted (dead load inclusive) with
GAIN=10mV or a -0.25 to 4.0 mV/V is permitted with GAIN=20mV.
The load cells must be chosen so that the input signal to the controller is at least 0,4μV per scale increment. For load cell output less than 0,4μV/digit the controller will still be stable but the full temperature range accuracy is not guaranteed.
This parameter allows the user to adjust internal speed of the A/D converter.
It is normally set to 14 for static weighing applications or to 57 for dynamic weighing applications.
LOAD CELL :
EXCITATION
5VDC, fixed or alternating polarity (Setup selectable) for 10 load cells of 350 OHM each.
CAUTION : Do not run signal cables together with power cables. Connect the shielding where indicated on the drawing only. Never use a megger to check wiring.
Never use plastic insulating tape on load cell connections.
Be sure the AC power socket outlet is properly protected. For optimum EMC performance, keep the length of shield inside the enclosure as short as possible.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
4 of 28
Technology and reliability that carries weight
3 SPECIFICATIONS
3.1
Environmental And Electrical Considerations
AMBIENT
TEMPERATURE
: Storage - 10 to +70
0
Operating -10 to +40
0
C.
C.
HUMIDITY
VIBRATION
AIR
PROTECTION :
ELECTROMAGNETIC :
FIELDS
INCOMING AND
OUTGOING SIGNALS
:
NOTES :
:
:
: 40 to 90% RH (non condensing).
Severe vibration can affect the accuracy of weighing and damage electric / electronic components.
The surrounding air should be dust free and not contain any corrosive gasses or materials which could adversely affect the equipment.
IP40 for table top or IP65 for stainless steel.
Heavy electrical equipment should not be installed close to the weighing equipment.
Relays and contactors connected to the equipment must have reliable and effective interference suppression. This also applies to other
equipment located within a distance of 3m from out equipment. Cabling
must be performed according to normal practice.
-WELDING on or in the vicinity of the equipment is strictly prohibited.
-STATIC loads, caused by thunderstorms, have to be prevented from developing by use of reliable lightning conductors.
-ENSURE that the cooling of the equipment is not obstructed.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
5 of 28
Technology and reliability that carries weight
3.2
Technical Specifications
CPU CHARACTERISTICS MCU 89C51RD, 64KB Flash ROM, 1KB RAM, 32KB serial EEPROM .
SELF DIAGNOSTICS
COMMUNICATION
DISPLAYS
KEYBOARD
APPROVALS
ACCURACY CLASS
RESOLUTION
MAX TARE EFFECT
AUTO ZERO TRACK
WEIGHT DIGITS
WEIGHT STEPS
DIGITAL FILTER
DIGITAL CALIBRATION
Hardware and Software, MCU watchdog.
Memory failure, I/O failure, Program check.
SERIAL PORT 1:RS232C Full duplex.
2400 baud ,7 data bits/even parity or 8 data bits/no parity.
Printer ,weight output.
SERIAL PORT 2:RS485 half duplex.
2400-57600 baud ,No or Even Parity ,7 or 8 data bits.
Master/Slave protocol, remove printer, EDP output,
weight output interface selection.
6 digit ,7 segment LED red (20mm height) or LCD.
Black (16mm height) plus annunciators for Net, No Motion,
Minus sign, Zero, Piece Counting .
8 key membrane type with tactile feedback.
EU type approval 10.000 divisions, DK 0199.27 & OIML R76 .
III
Selectabe up to 99.000 dd (in accordance with regulations).
- Max
Off or 0.5 dd setup selectable.
4,5,6
1, 2, 5, 10, 20, 50,100,200
FIR automatically adjusted to conversion speed, plus post.
Filtering (Rolling average 1, 2, 4, 8, 16, 32 samples).
Dead load, Span and scale Parameters via keyboard commands.
Calibration may be performed by application of weights or by the mV/V
values of the load cell data sheets.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
6 of 28
Technology and reliability that carries weight
ANALOG INPUT
LOADCELL EXC/TION
CONNECTION
SIGNAL RANGE
SENSITIVITY
+5V switched polarity or + 5 VDC with sense.
6 wire technique. Max 10 load cells 350 Ohm each.
-0.25 to 2.0 mV/V (Gain=10), -0.25 to 4.0 mV/V (Gain=20).
min 0,4 μV / digit (VSI) approved scales.
min 0,1 μV / digit non-approved scales.
Input noise 0.3μVp-p. Input bias current 10nA typical.
Sigma delta 550.000 internal counts max.
INPUT AMPLIFIER
A/D CONVERTER
LINEARITY
SPAN TEMP - COEFF
ZERO TEMP - COEFF
Conversion speed 3 , 7, 14, 28, 57,70 Hz (selectable).
Within 0,002% of full scale.
< 2 ppm / o
C.
< 2 ppm / o
C.
LONG TERM STABILITY 0.005 % of full scale per year.
2 nd
ANALOG INPUT
(OPTIONAL)
Two inputs for the connection of analog load cells.
Technical specifications of 2 nd
analog input are the same to the primary analog input.
Each input has its own configuration and calibration parameters.
DIGITAL INPUT (x1)
DIGITAL OUTPUT (x2)
9-24 VDC , positive common optoisolated to 2.5 KV.
Input resistance 3.3 KΩ.
ON delay 2 msec max. OFF delay 2msec max.
24 VDC ± 10 % transistor (SOURCE) darlington, positive common.
Max current 100 mA - leakage current 100 μA.
Max off - state voltage 30 VDC.
ON delay 2 msec max - OFF delay 2 msec max.
All outputs optoisolated to 2.5 KV.
ANALOGUE OUTPUT
CURRENT or VOLTAGE
CURRENT OUTPUT
VOLTAGE OUTPUT
RESOLUTION
Hardware selectable via jumper JP1 of printed circuit board 761
(see drawings LD52**/PCBS/040).
0 - 20 mA or 4 - 20 mA.
Max load resistance 1KΩ (line + termination).
0.02 - 10 V. Min load resistance 1KΩ.
LINEARITY
THERMAL STABILITY
Internal 16 bit.
External 16 bit or in accordance with regulation.
Better than 0,01% of FSR.
50 PPM/
0
C typical.
SHORT CIRCUIT
PROTECTION Yes, 25mA indefinite duration.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
7 of 28
Technology and reliability that carries weight
4 SETUP AND CALIBRATION
In the setup dialogue the following two numeric scroll edit procedures are used.
SINGLE DIGIT EDIT
~
=
INCREMENT DISPLAYED DIGIT
(
= ACCEPT DISPLAYED VALUE
MULTI DIGIT EDIT
>
= MOVE ONE DIGIT TO THE RIGHT (CYCLIC)
~
=
INCREMENT FLASHING DIGIT
(
= ACCEPT DISPLAYED NUMBER
To enter the setup & calibration procedure power on the unit.
During the self test routine while all display segments are on (all 8 on the display) .
Press ( momentarily followed by
> momentarily.
Display will show ACCESS briefly if PIN is activated.
Key in PIN number and then
( to get into the calibration menu.
Display shows SetUP
Use
< or
~
to step through SETUP
Par
CAL
STORE
INIT
A - CAL or dialogues if CAL LOCK is off.
SETUP
STORE dialogues if CAL LOCK is on.
While displayed, each dialogue can be accessed with
(
.
Alternatively the SETUP and CALIBRATION MENU maybe accessed with Fn 49.
Parameter entry and calibration is performed on the active analogue input channel.
e.g. to calibrate SCALE 1:
-select from the keyboard scale 1.
-scale 1 will be indicated on the front panel.
-select calibration menu.
-execute the calibration .
-SETUP REQUIREMENT PAR 8.9 = 1.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
8 of 28
Technology and reliability that carries weight
4.1
CALIBRATION LOCK (Cal Lock)
To prevent unauthorised calibration a calibration lock facility is provided.
This is a jumper JP1 placed inside the unit on the main board (PCB 801). With this jumper inserted the user may only change the SETUP. Parameter and Calibration menus can not be accessed.
LD5204-06 units are shipped with CAL LOCK jumper not inserted.
For table top enclosures the CAL LOCK facility appears on pins 7,8 of load cell connector on the rear panel.
If the pins are shorted the calibration is locked.
To calibrate the unit follow the instructions below :
-
-
-
-
-
-
Power up the instrument.
Allow 10 min for warm up.
Proceed with setup and calibration as described in the next pages.
After storage of calibration data remove the lid and insert the CAL LOCK jumper.
Replace the lid.
Seal the unit.
The parts of the enclosure can be sealed be means of either a wire and lead seal or a self-adhesive label.
The seal bears the mark of the manufacturer or the mark of the verification officer.
The position of the CAL LOCK jumper maybe checked by performing Fn48.
If the CAL LOCK is inserted the display will show SEALEd briefly.
Then the display shows CA.XXYY
where : XX = Calibration data check characters
YY = Setup data check characters
If the CAL LOCK jumper is not inserted the display will show directly CA.XXYY.
Press
( to continue.
The 6 digit Audit Trail Counter is displayed.
Press ) to exit.
The Audit Trail Counter is incremented every time a weight parameter or Calibration is changed regardless if the change was saved in EEPROM or not.
The A.T.CNT (Audit Trail Counter) is provided for Weights & Measures Authorities to check if any calibration attempt has been made since the last inspection.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
9 of 28
Technology and reliability that carries weight
4.2
DIALOGUE PAR (Scale Parameters)
While in the Par menu use key
~ to change value,
> to change digit,
( to accept entry and proceed to next step.
Parameter entry and calibration is performed on the active analogue input channel. (2 nd
analog load cell input option). Scale #1 and scale #2 has its own Parameter set.
Parameters are defined as follows :
8.5
8.6
8.7
8.8
8.1
8.2
8.3
8.4
1.P
2.P
3.P
4.P
5.P
6.P
7.P
8.9
=
8.A
=
8.b
0.P
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
No of display digits
Position of decimal point (Nr of decimal digits).
Display resolution
(4,5,6)
(0-5)
(1-200)
Two first digits of weighing range (Max2)
Digital filter (if x is entry filter averages 2 x
samples)
(00-99)
(0-5)
Number of conversions per second
No motion samples (if entry is x then samples = 2 x
(3,7,14,28,57,70)
). (1-7)
Autozero maintenance
Autozero on power up
Dual digital filter (Antiflicker)
Clear A/D Converter Error (Error 05)
0 = NO
0 = NO
0 = NO
0 = NO
1 = YES
1 = YES
1 = YES
1 = YES
Flash low battery indicator
Leading zero blank
0 = NO
0 = NO
1 = YES
1 = YES
Load cell Amplifier Gain adjustment (A/D Gain) 0 = 2 mV/V 1 = 4 mV/V
AC/DC Excitation
2 nd
analogue input connected
0 = AC
0 = NO
1 = DC
1 = YES
Zero range
Dual interval or Range
Dual interval / Range
0 = 2%
0 = interval
(00-99)
1 = 10%
1 = range
The first two digits of the weighing range for which the lower display division will be selected automatically (Max1).
00 = Dual interval / Range not active.
* Clear A/D converter error (8.4):
* AC/DC Excitation (8.8) :
If enabled A/D converter errors (due to excessive noise) will be cleared automatically, when the cause is no long present. If not the unit will require operator intervention to acknowledge the error.
AC: Switching polarity excitation, at a rate defined by the conversion rate. Switching excitation results in more stable zero.
DC: DC excitation selected for the load cells.
Notes for two scale operation
•
The indicator may display the SUM of the two scales provided that the decimal point (2.P), display step (3.P)
of the two scales are the same and dual interval 0.P=00.
•
The sum of conversions per second of the two scales (6P+6P) must be less than 70, else the unit sets 6.P=14 for each scale.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
10 of 28
Technology and reliability that carries weight
4.3
DIALOGUE CAL (Scale Calibration)
Press
( to enter submenu. Press
<
or
~ to scroll through S-CAL, E-CAL.
Press
( to enter the displayed dialogue.
DIALOGUE S-CAL (Standard calibration with weights)
Display shows ZERO. Press
<
or
~ to scroll through ZERO, SPAN or press
) to exit to S-CAL
Press
( to enter the displayed dialogue.
ZERO CALIBRATION (Dead-load adjustment)
Display shows E Scl a reminder to empty the scale. Wait about 10 sec (depends on digital filter).Press
(.
Display counts down for about 10 sec (averages 50 samples) then it displays zero.
Repeat the procedure if the zeropoint is not accurate.
Press ) to exit to ZERO.
SPAN CALIBRATION
Display shows xxxxx where xxxxx = Maximum capacity of scale.
Enter calibration weight.
To enter the weight use MULTI DIGIT EDIT procedure.
Display shows Add Id a reminder to load the calibration weight on the platform. After loading, wait about
10 sec (depends on the digital filter).
Press ( . Display counts down for about 10 sec. Then it shows the calibration weight.
Repeat the SPAN procedure if the calibration is not accurate.
Press
) to exit to SPAN.
Calibration is complete but factors obtained not protected in case of mains failure. Proceed to STORE menu for permanent storage of calibration data.
DIALOGUE E-CAL (Electronic calibration with mV/V form Load cell data sheets)
Display shows ZERO. Press < or ~ to scroll through ZERO, SPAN or press ) to exit to E-CAL
Press
( to enter the displayed dialogue.
Enter the overall mV/V of the dead-load (Load cell zero balance + scale dead-load).
Display shows weight. Press
) to exit to ZERO then
<
. Display shows SPAN. Press
(
Key in the overall mV/V value (calculated from the load cell data sheet), corresponding to a calibration
Weight equal to the max capacity of the scale and press
(
The entered value is used to compute the span factor after which the weight on the scale is displayed.
Press
) to exit to SPAN.
EXAMPLE
Assume a scale of Max= 30/60kg , e=0.010/0.020kg , with 4 loadcells of rated capacity
50kg -2mV/V each and the dead load is 1.940kg.
Loadcell data:
L/C1 : 1.9793 mV/V output at 50kg and zero balance : 0.0257 mV/V.
L/C2 : 1.9392 mV/V output at 50kg and zero balance : 0.0276 mV/V.
L/C3 : 1.9577 mV/V output at 50kg and zero balance : 0.0553 mV/V.
L/C4 : 1.9640 mV/V output at 50kg and zero balance : -0.0022 mV/V.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
11 of 28
Technology and reliability that carries weight
LC RATED OUTPUT average = (1.9793 + 1.9392 + 1.9577 +1.9640) / 4 = 1.9600 mV/V.
LC OUTPUT AT SCALE MAX = 1.9600*60 / 4*50 = 0.5880 mV/V.
L/C ZERO BALANCE average = [0.0257 + 0.0276 + 0.0553 + (- 0.0022)] / 4 = 0.0266 mV/V.
SCALE DEDLOAD : 1.9600 mV/V . 1.940 kg = 0.0190 mV/V.
(4x50kg)
OVERALL DEADLOAD = L/C ZERO BALANCE + SCALE DEADLOAD = 0.0456 mV/V.
Enter the value of 0.0456 for the dead load calibration and 0.5880 for span calibration.
4.4
DIALOGUE STORE (Save in EEPROM)
Press ( to permanently save all the calibration data.
Program exits calibration and reinitialises. (Up to 100000 storage cycles allowed).
4.5
DIALOGUE SETUP
Press
( to enter submenu. Press
<
or
~ to scroll through SETUP1, SETUP2, SETUP3, SETUP4, SETUP5.
Press ( to enter the displayed dialogue.
SETUP 1
SETUP 2
SETUP 3
SETUP 4
SETUP 5
Operational parameters.
Serial port 1 parameters.
Serial port 2 parameters.
Tilt Switch parameters.
Setpoint parameters.
SETUP 1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.t
1.E
(OPERATIONAL PARAMETERS).
Totalizing memory
Reserved
Reserved
Date format
Reserved
Real time clock
& Ram totaliser
Reserved
0 = No
0 = d-m-y
0 = No
1 = Yes
1 = m-d-y
1 = Yes
Enables the totalizing of printed weights.
Enables date time and totalizing in battery backed ram (option).
Function programs
Auto Power off
0 = No 1 = Yes Enables function operation with key T
00-99 minutes 00=Disabled.
Time for the unit to switch off if the scale is at zero.
Piece Count number (5-99) of samples
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
12 of 28
Technology and reliability that carries weight
SETUP 2 (SERIAL PORT 1 PARAMETERS)
2.t Print Type: 00 Port disabled
01 Ticket
02 Weight output
03 Single line
04 Ticket
05 Ticket
06 Single line
07 Weight
08 Nr and Weight
09 Demand
10 Label
13 Alibi memory
20 Custom prints
Date-time, Indicated weight.
Continuous transmission of weight
Gross or Net.
Three line Gross, Tare, Net or single line Gross.
Gross, Tare, Net, Quadruple size characters.
Number and Gross, Tare, Net.
Displayed weight.
Serial number, indicated weight single line.
Print demand by transmitting scale Address code.
Gross, Tare, Net.
Alibi memory enable.
Alibi memory location and gross weight is stored.
Format 1 in Gross (max 512 bytes).
Format 2 in Net (max 512 bytes).
2.L Page length
2.r
2.A
Left margin
2.F
Page header
2.E
Line termination:
2.1
2.2
2.3
2.6
2.7
2.8
2.d
Paper reverse
Printer model
Reserved
Print below min. capacity
2.4 Reserved
2.5
Reserved
Wait unload
Printer error control
Operator print type change
(Fn 20-30)
Data bits serial channel 1:
Ticket length in linefeeds.
Number of reverse linefeeds before printout.
Number of spaces from left margin.
Number of line feeds before printout.
0 = LF
0 = FANFOLD
1 = CRLF 2 = LFCR
1 = SLIP TM-290
0 = NO
0 = NO
0 = NO
0 = NO
0 = NO
0 = NO
1 = YES
1 = YES
1 = YES
1 = YES
1 = YES
1 = YES
17 = 7 data bits/even parity
08 = 8 data bits/no parity
NOTES : Baud rate is default to 2400.
Set printer error control 2.7=0 for communication with a PC.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
13 of 28
Technology and reliability that carries weight
SETUP 3 (SERIAL PORT 2 PARAMETERS)
3.t Instrument communication type: 00 Disabled
01 Continuous weight output
02 EDP protocol output
03 Printer protocol output
65-89 Master/slave protocol address
3.1 Timeout control
3.2 Handshake
3.3 Operator disable
3.4 Host enquiry
3.5 Remote keyboard commands
3.6 Reserved
3.7 Reserved
3.8 Debug
0 = NO
0 = NO
0 = NO
0 = NO
0 = NO
0 = NO
0 = NO
0 = NO
1 = YES
1 = YES
1 = YES
1 = YES
1 = YES
1 = YES
1 = YES
1 = YES
3.b Baud rate serial channel 2:
3.d Data bits serial channel 2:
24 = 2400 b/s
96 = 9600 b/s
19 = 19200 b/s
38 = 38400 b/s
57 = 57600 b/s
17 = 7 data bits/even parity
08 = 8 data bits/no parity
18 = 8 data bits/even parity
SETUP 4 (TILT SWITCH)
4.t Time delay after closing of the contact the display to lock. Also time for the display to unlock after the contact is opened.
00-99 (1/10 sec)
00 = Disabled
SETUP 5 (SETPOINT PARAMETERS)
5.6
5.7
Net / Gross
Operation
0 = Net
0 = Normally open
1 = Gross
1 = Normally closed
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
14 of 28
Technology and reliability that carries weight
4.6
DIALOGUE INIT (Installation of Default Parameters)
Loads default calibration data for checking purposes. The weight display will act as a mV/V meter of the load cell output.
Press
) to exit the init mode and restart the instrument.
Press < to exit but remain in the setup and calibration menu.
Be aware that the default parameters and calibration constants will remain in memory.
If a subsequent StorE operation is performed previous calibration data will be lost.
The default parameters are as follows :
Par 1.P = 5 8.9 = 0
2.P = 4
3.P = 1
8.A = 0
8.b = 0
0.P = 00 4.P = 40
5.P = 2
6.P = 7
7.P = 2
8.1-8.8 =11100110
DEADLOAD=0 mV/V~0,0000 on weight display SPAN=2 mV/V~2,0000 on weight display
SETUP 1
1.1 = 0
1.2 = 0
1.3 = 0
1.4 = 0
1.5 = 0
1.6 = 0
1.7 = 0
1.8 = 1
1.t = 00
1.E = 05
SETUP 2 SETUP 3
2.t = 06 3.t=00
2.L = 01
2.r = 00
3.1=0
3.2=0
2.A = 00
2.F = 00
2.E = 1
2.1 = 0
3.3=0
3.4=0
3.5=0
3.6=0
2.2 = 0
2.3 = 0
2.4 = 0
2.5 = 0
2.6 = 0
2.7 = 0
2.8 = 0
2.d = 17
3.7=0
3.8=0
3.b = 24
3.d = 18
SETUP 4
4.t = 00
SETUP 5
5.6 = 0
5.7 = 0
A-CAL
A.1 = 0
A.2 = 0
A.3 = 0
A.4 = 0
A.5 = 0
A.6 = 0
A.7 = 0
A.8 = 0
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
15 of 28
Technology and reliability that carries weight
4.7
DIALOGUE ACAL (D/A Analogue output calibration)
Used to set the analogue output parameters and calibrate the output if a calibration other than the standard is required.
The analogue output option is designed to interface the LD 5204/6 unit to weighing automation systems.
It consists of a D/A converter (with voltage or current output) galvanically isolated. The output is capable of driving 20mA into 1KΩ load. The circuit may be operated as current output (0 - 20 mA, 4 - 20 mA, 0 - 24 mA) or voltage output (0-10V). The selection of the operating mode is done hardware by means of jumper
JP1 on PCB 761 (Factory set to 0 - 20 mA mode) and parameter A.4 below.
The output maybe operated with standard calibration where 0 on the weight display is output as 0 mA or
4 mA and max on the display is output as 20mA. Also a user calibration is available where 0 on the display is output at the user defined value (Zero) and max on the display is output at the user defined value (FULL).
User defined calibration also applies to the voltage output mode.
A.1
Calibration Standard/User 0=Standard
(20mA on max)
A.2
Reserved
A.3
Scale error output
A.4
Current / Voltage
A.5
Net / Gross
0=Low (0 mA)
0=Current
0=Net weight
A.6
0-20 / 4-20
A.7
Resolution
A.8
Operation
0=0-20mA
0=Display
0=Disabled
1=User defined
Zero & Span
1=High (24mA)
1=Voltage
1=Gross weight
1=4-20mA
1=Internal
1=Enabled
Dialogue ACAL continues below only if A.1 = 1.
Display shows Zero briefly.
Then display shows 0 XX.XXX
Key in the D/A output in mA or Volt (depending on A.4) using the
“ NUMERIC SCROLL ENTRY “ procedure to define the D/A output for zero weight indication.
or
Press
(
to the zero output and go to FULL
Press
)
to escape from D/A calibration.
Display shows FULL briefly.
Then the display shows F XX.XXX. Key in the D/A output in mA or Volt (depending on A.4) using the
“ NUMERIC SCROLL ENTRY “ procedure. The program ends after the definition of FULL.
To select current or voltage output the jumper JP1 on PCB 761 should be placed in the proper position
(see drawings LD52**/PCBS/040).
CONNECTION
Pin 1 =
Pin 2 =
Pin 3 =
Current output (+)
Voltage output (+)
Common (current or voltage)
Pin 4 =
Pin 5 = power in (+) power in (-)
Connect Pins 1 & 3 for current output.
Connect Pins 2 & 3 for voltage output.
An external power supply 24VDC is required for the analog output operation.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
16 of 28
Technology and reliability that carries weight
3.
4.
5.
ADJUSTMENT OF D/A VOLTAGE
If adjustment of the output 0-10V is necessary:
1.
2.
Place jumper JP1 on PCB (761) for voltage output.
Power up the unit and enter SETUP menu to set ACAL parameters as follows:
A.1=1 A.2=0 A.3=0 A.4=1 A.5=0 A.6=0 A.7=1 A.8=1
Skip D/A calibration and save this SETUP with a STORE operation.
Use Fn 85. Display shows C00000. Enter the value 65535.
Measure with a voltmeter the voltage at pins 2 (+) and 3 (-) the analogue output connector (J4).
Record the value.
Exit Fn 85 and re-enter SETUP menu to define Zero of D/A (value 00.000) and the Full value calculated as:
Full =
100
---------------------------------------------
measured voltage (in volts)
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
17 of 28
Technology and reliability that carries weight
5 SERIAL COMMUNICATION PORT 1. (RS232C)
The port is used to connect to serial printers or personal computers. Data output and handshake requirements are defined by SETUP 2.
TYPE Asynchronous serial ASCII, RS232C standard, full duplex.
PROTOCOL 2400 baud, 1 start, 7 data/even parity or 8 data/no parity, 1 stop bit.
HANDSHAKE
CONNECTION
DATA
DTR BUSY per character for fanfold printers or REQUEST
PAPER END STATUS for EPSON TM-290 slip printer.
DB9 male on rear panel. (J1)
Tx = Pin 3
Rx/DTR = Pin 2
GND = Pin 5
SHIELD = Metal case of D-Type connector
Cable: 3 conductor shielded max distance 15m.
The data output of serial port 1 is selectable via SETUP 2, and maybe one of printer output, continuous weight output, or demand weight output
5.1
PRINTER OUTPUT (SETUP 2 2.t=01, 03, 04, 05, 06, 07, 08, 10, 20)
The data to be printed, printer type and paper dimensions is defined in SETUP 2
5.2
CONTINUOUS WEIGHT OUTPUT (SETUP 2 2.t=02)
The indicated weight and status information is transmitted continuously. No handshake is required.
BYTE
1
2
3-8
9
NAME
DATA BLOCK COMPOSITION
STATUS, POLARITY, WEIGHT, SYNC (P+123.45CR)
DESCRIPTION
WEIGHT
STATUS
POLARITY
WEIGHT
DIGITS
SYNC
Bit0 0=NORMAL 1=NO WEIGHT DISPLAY
Bit1 0=GROSS 1=NET
Bit2 0= 1=AUTO ZERO
Bit3 0=WITHIN RANGE 1=OUT OF RANGE
Bit4 0=NO STANDSTILL 1=STANDSTILL
Bit5 0=NORMAL 1=UNDER MIN. WEIGHING RANGE
Bit6 ALWAYS 1 TO OBTAIN PRINTABLE CHARACTERS
Bit7 ZERO OR PARITY
"+" OR "-"
6 DIGITS DEPENDING ON LD5204-06 SETUP
INCLUDING DECIMAL POINT IF ANY
CR (0d hex) FOR SYNCHRONISATION
5.3
PRINT ON DEMAND (SETUP 2 2.t=09)
The weight data is transmitted every time a character is received from the connected peripheral.
The demand character is programmed in SETUP 3 3.t., e.g. “1” 49d or 31 hex.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
18 of 28
Technology and reliability that carries weight
5.4
ALIBI TRANSMIT (SETUP 2 2.t=13)
The purpose of the Alibi memory is to produce an accurate non modifiable record for each weight transmission to a host computer so that the scale weight may be incorporated in a weighing protocol / delivery note, printed by the host computer.
The alibi record consists of unique serial number and the weight. Only gross weights may be stored.
The record is transmitted in the form:
1234 012340 kgG
The following function programs are available:
Fn 55 to view the Alibi memory records.
Fn 56 to print all the records.
Fn 57 to checksum the memory.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
19 of 28
Technology and reliability that carries weight
6 SERIAL COMMUNICATIONS PORT 2 (RS485)
The port is used for connection with Host computer, remote printer, remote display etc.
The mode of operation is selected in SETUP 3.
1 :
2 :
3 :
4 :
5 :
3.t = 00
3.t = 01
3.t = 02
3.t = 03
3.t = 65 - 89
Disable.
Continuous weight output.
EDP protocol output.
Printer protocol output.
Master / Slave operation.
TYPE
PROTOCOL
Asynchronous serial ASCII, HALF DUPLEX.
2400 to 57600 baud, 1 start, 7 or 8 data, 1 Even parity, 1 stop bit.
CONNECTION DB9 female on rear panel. (J3).
A = Pin 6
B = Pin 7
SHIELD = Metal case of D-Type
A termination resistor 120R may be connected by shorting pins 8 and 9.
Cable: 2 conductor twisted pair and shielded max distance 1000m.
6.1
CONTINUOUS WEIGHT OUTPUT (SETUP 3.t = 01)
The indicated weight and status information is transmitted continuously. No handshake is required.
BYTE
1
2
3-8
9
NAME
WEIGHT
STATUS
POLARITY
WEIGHT
DIGITS
SYNC
DATA BLOCK COMPOSITION
STATUS, POLARITY, WEIGHT, SYNC (P+123.45CR)
DESCRIPTION
Bit0 0=NORMAL 1=NO WEIGHT DISPLAY
Bit1 0=GROSS 1=NET
Bit2 0= 1=AUTO ZERO
Bit3 0=WITHIN RANGE 1=OUT OF RANGE
Bit4 0=NO STANDSTILL 1=STANDSTILL
Bit5 0=NORMAL 1=UNDER MIN. WEIGHING RANGE
Bit6 ALWAYS 1 TO OBTAIN PRINTABLE CHARACTERS
Bit7 ZERO OR PARITY
"+" OR "-"
6 DIGITS DEPENDING ON LD5204-06 SETUP
INCLUDING DECIMAL POINT IF ANY
CR (0d hex) FOR SYNCHRONISATION
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
20 of 28
Technology and reliability that carries weight
6.2
EDP PROTOCOL OUTPUT (SETUP 3.t = 02)
This mode is used to transmit the data printed to a host computer. Transmission will begin after completion of printing. ACK / NAK handshake or no handshake may be used.
The host must reply with ACK (06 h) if it received the data correctly or NAK (15 h) to enable retransmissions.
DATA BLOCK COMPOSITION
HANDSHAKE
ERRORS
: STX
DATA
ETX
BCC
= (02 h) = start of text character.
= Printable ASCII data identical to the data printed.
= (03 h) = End of text character.
= Block check character.(XORSUM of all data
characters STX, ETX inclusive).
: ENQ (05 h) from host within 5 sec of protocol initialisation.
ACK (06 h) from host within 5 sec after the end of transmission or NAK (15 h) from host within 5 sec after the end of transmission to enable retransmissions of the block. The number of repeats is unlimited.
: Err 30
Err 33 :
: Host not ready
Host not Acknowledge
Refer to Error chapter for details on error response.
SETUP REQUIREMENTS
Time out control
Handshake
Operator disable
Host enquiry
: 3.t = 02
3.1 = Time out control
3.2 = Handshake
3.3 = Operator disable
3.4 = Host enquiry
0 = No
0 = No
0 = No
0 = No
1 = Yes
1 = Yes
1 = Yes
1 = Yes
: The LD5204-06 checks the on line status of the interface and reports an error if failure is detected.
: The LD5204-06 will check for reception of ACK / NAK character after transmission.
: The operator will be prompted to disable further transmission if an error occurs, if SETUP 3 3.3 = 1. Transmission will be enabled again after a power on reset.
If SETUP 3 3.3 = 0 only the current transmission will be aborted.
: The LD5204-06 waits for ENQ (05h) character before it
begins transmission.
6.3
REMOTE PRINTER OUTPUT (SETUP 3.t = 03)
Used to transmit the data printed on the local printer to a remote printer.
No handshake is required.
6.4
MASTER / SLAVE OPERATION
Used to connect several LD5204-06 units in a local network to a higher level computer which acts as the master.
Refer to LD5204-06 MSP SERIAL INTERFACE for details.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
21 of 28
Technology and reliability that carries weight
7 ERRORS
If an error occurs during the operation, it will be displayed in the form Err xx , where xx is the Error code.
Program is halted.
Press ) momentarily to acknowledge the error and proceed as indicated in the error operator response.
Errors may occur during setup, programming, power-up and during operation.
ERROR
DISPLAY
Err 01
Err 02
Err 04
Err 05
Err 06
Err 15
Err 16
Err 20
Err 26
Err 30
Err 33
Err 50
Err 51
Err 55
Err 56
Err 57
Err 67
Err 69
POSSIBLE CAUSE
SYSTEM ROM : Faulty EPROM.
DATA RAM : Faulty CMOS RAM.
CALIBRATION DATA : Faulty EEPROM.
SCALE or A/D CONVERTER.
LOW INPUT VOLTAGE .
System has been initialised due to power failure or soft reset.
System DATE – TIME is wrong.
PRINTER IS NOT ON-LINE.
Either not connected or out of paper or failed.
No paper for EPSON TM295 printer.
Protocol not ready. Computer not connected or communication link failed.
Protocol not Acknowledge. No correct response has been received from host computer.
Small sample count.
Small sample weight.
Alibi memory full.
No Alibi memory in NET mode (only gross).
Alibi memory corrupted.
Corrupted totaliser.
TOTALISER OVERFLOW.
Because totalisers have not been cleared for long time.
ACTION TO BE TAKEN
Contact manufacturer.
Contact manufacturer.
Contact manufacturer.
Check scale, cable, connectors, contact manufacturer.
Check power supplied to the instrument.
Zero scale.
Enter new date – time.
Check printer cables. Press ( to retry
Or ) to abort.
Supply with paper.
Check computer cables. Press ( to retry or ) to abort.
Check computer cables. Press ( to retry or ) to abort.
Retry.
Retry.
Acknowledge the error. The unique identification number will reset to 0000.
Printout aborted.
The Alibi memory can not be cleared but next records will be corrected.
Clear totalising memory.
Print / clear totalisers. Overflow is not critical.
But remember that 1 total capacity must be added to the indication, each time an overflow occurs.
To exit from error display press ) .
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
22 of 28
Technology and reliability that carries weight
8 FUNCTION MENU
The function menu enables the selection of a number of software programs indirectly.
Press key
> and hold pressed for ~ 3 sec.
Display shows Fn 00 . Key in the function code desired (using multi digit entry procedure).
MULTI DIGIT EDIT
>
= MOVE ONE DIGIT TO THE RIGHT (CYCLIC)
~ = INCREMENT FLASHING DIGIT
(
= ACCEPT DISPLAYED NUMBER
The corresponding program will be activated.
To exit the function selection, press ( while Fn 00 is displayed.
To exit from any function program, press
)
The function menu will not operate if function operation is disabled (SETUP 1.8=0) or while the sum of scale#1 and scale #2 is displayed.
The following functions are available.
Fn 01
Fn 02
Fn 05
Fn 06
Fn 20 - 30
Fn 20
Fn 21
Fn 22
EDIT SETPOINTS
Display shows SetP 1 briefly, then the existing setpoint value. Key in the desired value.
Display shows SetP 2 briefly, then the existing setpoint value. Key in the desired value.
The setpoints are saved in EEPROM.
DISPLAY REMAINING BATTERY CAPACITY
The battery charge will be displayed as a percentage of the remaining capacity.
SET DATE – TIME – SERIAL Nr. (Option and enabled only if SETUP 1.6 = 1)
-Display shows: DDMMYY or MMDDYY (depends on setup 1.4)
DD=Day, MM=Month, YY=Year. Use MULTI DIGIT EDIT to edit the date.
-Display shows: HHmmSS. HH=Hour, mm=minutes, SS=Seconds. Edit the time.
-Display shows: nnnnn, the print serial number. Edit the print number.
The program ends and returns to weight display.
HIGH RESOLUTION
The weight display accuracy will be increased 10 times.
The display flashes. Press
) to exit and return to normal resolution.
PRINT TYPE SELECT
Equivalent to 2.t in SETUP 2 (i.e. Fn23 corresponds to 2.t=03)
The functions are activated only if SETUP 2.8=1
DISABLE PRINTER OUTPUT
PRINT FORMAT 1
CONTINUOUS WEIGHT OUTPUT
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
23 of 28
Technology and reliability that carries weight
Fn 23
Fn 24
Fn 25
Fn 26
Fn 27
Fn 28
Fn 29
Fn 30
Fn 40
PRINT FORMAT 3
PRINT FORMAT 4
PRINT FORMAT 5
PRINT FORMAT 6
PRINT FORMAT 7
PRINT FORMAT 8
PRINT FORMAT 9
PRINT FORMAT 10
PIN CHANGE
Used to change the current Personal Identification Number that enables access to the calibration procedure. (The unit is factory set so that the PIN is not active i.e. 000000).
The display shows Pin 0 briefly then 000000. Key in the old pin and press (.
The display shows Pin 1 if the pin was correct else the unit resets.
Key in the new Pin and press ( .
The display shows Pin 2. Key in the same Pin for validation and press (.
The new pin is stored and the display shows PASS briefly.
If the two entries are not the same, FAIL is displayed briefly and the program returns with the old pin remaining in memory.
WARNING : Make sure you do not forget the code entered. If the code is lost the unit must
be returned to the factory to initialise the Pin and a fee will be charged.
Fn 41 DOWNLOAD CUSTOM PRINT FORMAT . 1 (GROSS MODE)
FORMAT 1 ticket is printed if setup 2t=20 and when the indicator operates in gross mode.
The ticket may be downloaded from a PC to the LD5204/6 via serial port 1 (RS232C). A max
of 511 bytes may be stored. If more characters are received they will be lost.
The ticket format may be created or edited with ASCII characters, comprising of fixed texts and print fields. When a print operation takes place LD 5204/6 will insert the print fields.
The following fields are available:
Field Description Field Description
[!011] Aver. piece weight [!014] gross weight
[!012] pieces [!015] tare weight
[!017] net weight
Field Description
[!016] print serial no
[!042] totaliser
Example:
Ticket ASCII characters
LEON ENGINEERING
WEIGHT <[!014] kg>
N: [!016]
Printed ticket
LEON ENGINEERING
WEIGHT <12345 kg>
N: 0001
Use a serial communication program (e.g. Hyper terminal, Procomm) and set serial port, baud rate/data bits. Download procedure:
Select Fn 41. The display will show ACCESS if PIN is activated. Key in the PIN and press ( .
The display shows For 1 .The default ticket is uploaded to the PC and the LD5204/6 is ready to receive format 1. The ticket may be used for editing of a new one may be downloaded.
Download the ticket to the indicator and press ) to acknowledge the end of transmission.
Display shows Prn 1 briefly and the received ASCII block is transmitted to the PC for verification. The received ticket is stored in non volatile memory.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
24 of 28
Technology and reliability that carries weight
Fn 42
Fn 43
DOWNLOAD CUSTOM PRINT FORMAT . 2 (NET MODE)
Identical procedure with Fn 41. The display shows For 2 .
FORMAT 2 ticket is printed if setup 2t=20 and when the indicator operates in net mode.
COPY LAST PRINTOUT
Used to reprint the ticket just printed, in case the paper is damaged.
CALIBRATION NR CHECK Refer to chapter 4.1
Fn 48
Fn 49
Fn 50
SETUP & CALIBRATION Refer to chapter 4
PIECE COUNT
The display will show the number of pieces on the scale calculated using the average piece weight already in memory. (identical operation with key & ).
Fn 51 SAMPLE & DISPLAY PIECES
-Display shows Pc XX. Enter the sample size.
-Display shows the number of pieces (piece count symbol illuminates).
-Press < to display the average piece weight. (Press again to return to pieces display)
or press > to tare the scale or press ( to print weight and pieces.
Press & to return to weight mode.
Fn 52 EDIT AVERAGE PIECE WEIGHT & DISPLAY PIECES
-Display shows XXXXX . Edit the average piece weight in * 100 accuracy.
-Display shows the number of pieces (piece count symbol illuminates).
-Press < to display the average piece weight (press again to return to pieces display)
or press > to tare the scale or press
(
to print weight and pieces.
Press & to return to weight mode.
Fn 53 SAMPLE & DISPLAY AVERAGE PIECE WEIGHT
Display shows Pc XX . Enter the sample size.
Display shows the average piece weight in * 100 accuracy. Press ) to exit.
Fn 55 VIEW ALIBI MEMORY LOCATION / PRINT 10 NEXT SERIAL NUMBERS
The display shows n 1 2 3 4 where 1234 is the serial number of the last record.
Key in the 4 digit serial number desired and / or press
(
. The display flashes the weight of this record. Press
(
to print the serial number displayed plus the next nine locations.
Fn 56 PRINT ALL ALIBI MEMORY
Automatically prints a list of the contents of the Alibi memory. The printer must be capable of printing on 80 columns paper compressed mode.
Empty locations are printed as - - - - - - .
Corrupted locations are printed as * * * * * * .
The program exits when the printout is completed or ) is pressed.
Fn 57 CHECK ALIBI MEMORY
A checksum is performed on each Alibi memory record. If an error is found Err 57 is displayed.
Press ) to exit. If all is OK, PASS is displayed briefly.
Alibi memory functions and storage are executed only if enabled from SETUP (SETUP 2.t=13).
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
25 of 28
Fn 81
Fn 82
Fn 85
Fn 80-99
Fn 80
Fn 86
Fn 90
Fn 91
Fn 93
Fn 94
Fn 96
Technology and reliability that carries weight
These functions are for use by service personnel only.
LOAD CELL MV METER
The actual mV/V output of the scale sensors is displayed. To act as a mV/V meter the unit loads default calibration data.
DISPLAY INTERNAL A/D COUNT
The analog to digital converter internal count is displayed.
DISPLAY VERSION – DATE
The software version and the date of the software is displayed.
ANALOGUE OUTPUT TEST
Display shows C 0 0 0 0 0 .
Use the “NUMERIC SCROLL ENTRY” to key in a value from 0-65535 corresponding
to 0-24mA or 0-10V. Press
(
to output the value displayed or press
) to exit.
ROM - RAM TEST
A validity check is performed on system ROM and RAM.
Err 01 will be displayed if ROM data is corrupted.
Err 02 will be displayed if RAM data is corrupted.
DISPLAY SEGMENT TEST
All digits go through 0-9 display routine in sequence, after which the character set is displayed.
KEYBOARD TEST
Display blanks. The scan code of any key pressed will be shown on the display.
SETPOINT INPUT/OUTPUT TEST
Display shows 0. 10 the status of input and outputs.
1
5
6 st th th
digit displays input.
digit displays output 1.
digit displays output 2.
Press < to activate-deactivate output 1.
Press & to activate-deactivate output 2.
PRINT BUFFER TEST
An ASCII file (30h-7Fh) is output to the printer port with error control.
DISPLAY RECEIVED CHARACTERS COM 1 & COM 2
Any character received by COM 1 will be echoed and displayed in ASCII hex on digits 1&2.
Any character received by COM 2 will be echoed and displayed in ASCII hex on digits 5&6.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
26 of 28
Technology and reliability that carries weight
9 DIGITAL SET POINT OUTPUTS
The SET POINT option is designed for interfacing LD 5204-06 units with weighing automation systems.
It contains two opto-isolated outputs that can be operated as weight set points.
The set points are programmed using the program Fn 1.
The two set points are programmed in sequence. When all set points have been edited the program returns to the weight display mode.
The SET POINT may be activated by net weight value (SETUP 5.6=0) or by gross weight value
(SETUP 5.6=1).
SET POINT outputs may be operated as normally open if SETUP 5.7=0 or normally closed if SETUP 5.7=1.
SET POINT outputs may be activated for test purpose using Fn 93.
DIGITAL INPUT (TILT SWITCH)
Used to set the time delay for the tilt switch function.
Function is enabled from SETUP 4.t=xx . If xx=00 tilt function is disabled. Else set the time delay (time in
1/10 sec) for display lock. Display locks after xx time when contacts close and unlocks after the same time, when contacts open. Refer to cabling diagram in Annex A for connection.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
27 of 28
Technology and reliability that carries weight
10 MAINTENANCE
The unit does not require any routine maintenance. It may be necessary to perform periodic checks of the calibration of the scale due to mechanical reasons. The frequency of the calibration checks depends on the application condition and on the required measuring accuracy.
It may happen that, in exceptional conditions, the unit locks on a wrong memory location and it is not possible to restart because the keyboard is not operative.
To restart is necessary to switch the power OFF then ON again.
-
10.1 SERVICE
There no serviceable parts. The unit must be serviced by trained personnel only. The user may check load cell connection and power supply.
-
-
LOAD CELLS
Load cells are reliable and very rarely present errors. Check input and output resistance, and resistance between any terminal and shield. Check load cell connection and cable.
POWER SUPPLY
Check 9-15VDC power supply & resettable fuse F4 on PCB 801.
SETPOINT OUTPUTS
Check 24VDC power supply & resettable fuse F3 on PCB 801.
LEON ENGINEERING maintains a fully trained staff of field service engineers who provide:
-
-
-
-
-
-
Technical assistance by telephone.
Application assistance on-site or by telephone.
Trouble shooting on-site.
Warranty (replacement) or spare parts assistance.
Training on-site or at out service centre.
Equipment updates to our latest configuration.
Our engineers will check repair, mechanical, electrical, electronic, wiring and calibration errors.
Document
LD5204-06
WEIGHT INDICATOR - TECHNICAL MANUAL
Date Code
27.04.00
LD5204_06.0TM
Rev.
0
Page
28 of 28
Download
Public link updated
The public link to your chat has been updated. You may view and manage your chat links after registration here.
Document public link
Advertisement
Key features
High accuracy A/D converter
Front panel display
8 membrane keys
Non-volatile memory
Serial port RS232C
RS485 serial port (optional)
Analog output (optional)
2 setpoints
1 optoisolated input
Frequently asked questions
The LD5204 06 comes with either a 6-digit, 7-segment LED red display (20 mm height) or a 6-digit, 7-segment LCD display black (16 mm height) with annunciators.
The Alibi memory is used to store an accurate, non-modifiable record of each weight transmission to a host computer. This helps ensure data integrity and allows for traceability.
You can connect the LD5204 06 to a host computer using the RS232C or RS485 serial ports. The communication protocol and handshake requirements are defined in the setup menu.
The analog output option allows for interface with automation systems. It can be configured as either current output (0 - 20 mA, 4 - 20 mA, 0 - 24 mA) or voltage output (0-10V).
