Systec IT3000A Technical Manual
Technical Manual
IT3000A
Industrial Weighing Terminal
October 2007
ST.2309.0667
Rev. 4
© SysTec GmbH • Ludwig-Erhard-Str. 6 • D 50129 Bergheim-Glessen
Tel.: 02238 / 9663-0 • Fax.: 02238 / 9663-10
Web: www.systecnet.com • E-Mail: info@systecnet.com
2 Technical Manual IT3000A Rev. 4
Technical Manual IT3000A Rev. 4 3
Technical Manual IT3000A
Date: October 22, 2007
File: IT3000A_THE.DOC
Program Version: 2.41
4 Technical Manual IT3000A Rev. 4
Published By:
SysTec GmbH, Ludwig-Erhard-Str.6, D-50129 Bergheim-Glessen, Germany
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, mechanical, photocopying, recording, or otherwise, without the
prior written permission of SysTec GmbH.
Copyright © 2005 by SysTec GmbH
Terms and product names mentioned in this publication are trademarks, registered trademarks or
service marks of their respective owners. Use of a term should not be regarded as affecting the
validity of any trademark, registered trademark or service mark.
EPSON ESC/P® is a registered trademark of the SEIKO EPSON Corporation.
TOLEDO® is a registered trademark of Mettler-Toledo Inc.
Please Note:
While every precaution has been taken in the preparation of this manual, SysTec GmbH assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of
the information contained herein.
The publisher is grateful for any information and/or advice that may contribute to correct errors or
omissions in following editions.
Technical Manual IT3000A Rev. 4 5
Contents
1 Introduction .............................................................................................................9
1.1 General..............................................................................................................9
1.2 Safety Symbols Used In This Manual.....................................................................9
1.3 Safety Advice.....................................................................................................9
1.4 Declaration Of Conformity.................................................................................. 11
2 System Description .................................................................................................12
2.1 Construction.....................................................................................................12
3 Description Of Components .....................................................................................13
3.1 Main Module CPU3000A ...................................................................................13
3.2 Display ............................................................................................................13
3.3 Power Supply 110 - 240 VAC ............................................................................14
3.4 Power Supply 12 - 30 VDC ................................................................................14
4 Installation .............................................................................................................15
4.1 Safety Advice...................................................................................................15
4.2 Setup Of The Instrument....................................................................................15
4.3 Opening Of The Housing .................................................................................... 15
4.4 Connection Of Cables........................................................................................15
4.5 Connection Of Scale.......................................................................................... 16
4.5.1 Analog Understructures And Loadcells ..................................................... 16
4.5.2 Connection Of 1 Scale Base Via ADM...................................................... 16
4.5.3 Connection Of 2 Scale Bases Via Dual-ADM .............................................17
4.5.4 Connection Cables.................................................................................17
4.5.5 Multiple-Range Scale.............................................................................. 18
4.5.6 Multi-Interval Scale ................................................................................19
4.5.7 Adaptation To Scale Environment ............................................................ 20
4.5.8 Setting Of Geo Value .............................................................................20
4.5.9 Weights & Measures Approved Applications .............................................20
4.5.10 Securing Scale Parameters....................................................................21
4.6 Serial Interfaces................................................................................................22
4.6.1 Connection Of Serial Interfaces ...............................................................22
4.6.2 SIM RS485.OPTO..................................................................................22
4.6.3 RS485 Network ....................................................................................23
4.6.4 Cables For Serial Interfaces.....................................................................24
4.7 Connection Of Parallel I/Os................................................................................. 25
4.8 Connection Of 8-Bit Analog Output DAU .............................................................26
4.9 Connection Of 15-Bit Analog Output DAU15........................................................28
4.10 Mains Connection ...........................................................................................30
5 Service Mode ......................................................................................................... 31
5.1 General............................................................................................................31
5.2 Display And Keyboard .......................................................................................32
5.2.1 Multiple Assignment Of Numeric Keypad ..................................................33
5.3 Operator Prompting ...........................................................................................33
5.4 Overview .........................................................................................................34
5.5 Overview Service Mode .....................................................................................36
6 Calibration .............................................................................................................38
6.1 Entering Calibration Mode ..................................................................................38
6.2 Select Group ....................................................................................................39
6.3 Scale Parameters ..............................................................................................40
6.4 Calibration........................................................................................................43
6.5 Linearization .....................................................................................................45
6.6 Zero Adjust ......................................................................................................46
6.7 Adaptation .......................................................................................................47
6.8 High Resolution ................................................................................................49
6.9 Reset Parameters ..............................................................................................50
6.10 Calculate Span................................................................................................51
6.11 W&M Info ......................................................................................................52
6.12 Factory Calibration ..........................................................................................53
6 Technical Manual IT3000A Rev. 4
6.13 Geo Values ....................................................................................................53
7 Interface Configuration............................................................................................ 55
8 Configuration Of Data Entry And Print Format ............................................................ 58
8.1 Configuration Of Fields ...................................................................................... 58
9 Entry Of Parameters................................................................................................ 63
10 Operating Modes .................................................................................................... 69
10.1 Weighing Functions......................................................................................... 69
10.1.1 Tare Memory ...................................................................................... 71
10.2 Tare Functions................................................................................................ 72
10.2.1 Set / Clear Tare................................................................................... 72
10.2.2 Autoclear Tare .................................................................................... 72
10.2.3 Repetitive Tare.................................................................................... 72
10.3 Operating Mode 'BASIC'.................................................................................. 73
10.4 Operating Mode 'COUNT' ................................................................................ 74
10.5 Operating Mode 'TRUCK'................................................................................. 79
10.6 Operating Mode 'FILL 1' .................................................................................. 81
10.7 Operating Mode 'FILL 2' .................................................................................. 83
10.8 Operating Mode 'CHECK'................................................................................. 86
10.9 Operating Mode 'TRUCK ONLINE'..................................................................... 87
10.10 Operating Mode 'BASIC/COUNT' .................................................................... 87
11 Backup.................................................................................................................. 88
12 Restore ................................................................................................................. 88
13 Hardware Test .......................................................................................................89
14 Entry Of Parameters For Analog Output..................................................................... 90
15 Reset .................................................................................................................... 91
16 Online Mode .......................................................................................................... 92
16.1 Structure Of Data Strings ................................................................................ 92
16.2 Overview Commands ...................................................................................... 93
16.3 Read Weights ................................................................................................. 94
16.4 Taring............................................................................................................ 97
16.5 Select Scale ................................................................................................... 98
16.6 Set Scale To Zero ........................................................................................... 99
16.7 Display Of Text And Entries ............................................................................. 99
16.8 Printing........................................................................................................ 104
16.9 Read / Set Digital I/Os ................................................................................... 105
16.10 Key And Error Codes ................................................................................... 107
16.11 Multidrop Connection .................................................................................. 108
16.11.1 Establish And Terminate Connection .................................................. 108
16.11.2 Example (Polling Of Slave 1 And Slave 2)........................................... 109
17 Spervisor Mode .................................................................................................... 110
17.1 Entry of Parameters ...................................................................................... 110
17.2 Data Archive ................................................................................................ 112
17.2.1 View Stored Records ......................................................................... 113
17.2.2 Show Data Archive Info ..................................................................... 113
17.3 Error Report ................................................................................................. 114
18 Configuration Examples ......................................................................................... 115
18.1 Example 'BASIC'........................................................................................... 115
18.2 Example 'COUNT'......................................................................................... 122
18.3 Example 'TRUCK' ......................................................................................... 123
18.4 Example 'FILL'.............................................................................................. 126
18.5 Factory Setting............................................................................................. 127
18.6 Field Length Of System Variables.................................................................... 128
18.7 Form For Print Layouts (80 Columns) .............................................................. 129
18.8 Form For Print Layouts (40 Columns) .............................................................. 130
18.9 Form For Configuration.................................................................................. 131
Technical Manual IT3000A Rev. 4 7
19 Data Transmission ................................................................................................132
19.1 Data Transmission Example 1 .........................................................................133
19.2 Data Transmission Example 2 .........................................................................134
19.3 Data Transmission Example 3 .........................................................................135
19.4 Protocol For Data Transmission....................................................................... 136
19.5 Continuous Output ........................................................................................137
19.5.1 SysTec Protocol ................................................................................137
19.5.2 Flintec Protocol .................................................................................137
19.5.3 Spec 1 Protocol.................................................................................137
19.5.4 Spec 2 Protocol.................................................................................137
19.5.5 Schauf Protocol................................................................................. 137
19.5.6 TOLEDO® Protocol ............................................................................. 138
19.5.7 TOLEDO® TSM Protocol .....................................................................138
20 Transport, Maintenance And Cleaning .....................................................................140
20.1 Transport ..................................................................................................... 140
20.2 Maintenance................................................................................................. 140
20.3 Cleaning.......................................................................................................140
21 Trouble Shooting ..................................................................................................141
21.1 Exchange Of OTPs ........................................................................................ 142
21.2 Error Messages ............................................................................................. 144
22 Technical Data .....................................................................................................147
23 Dimensions .......................................................................................................... 148
24 Service Password .................................................................................................149
8 Technical Manual IT3000A Rev. 4
Technical Manual IT3000A Rev. 4 9
1 Introduction
1.1 General
This manual contains information and Technical Data for installation and operation of the IT3000A
industrial weighing terminal. It is structured in the main chapters:
• Modules and connections
• Calibration
• Service Mode for configuration and settings
• Online mode
• Configuration examples.
1.2 Safety Symbols Used In This Manual
Safety relevant information is shown with corresponding symbols as follows:
W A R N I N G
Failure to observe this precaution could result in serious injuries or fatal accidents. Please make
absolutely sure that these precautions are observed in order to ensure safe operation of the
equipment.
CAUTION
Failure to observe this precaution could result in damage to or destruction of the equipment or
bodily harm! Please make absolutely sure that these precautions are observed in order to ensure
safe operation of the equipment.
Note: This indicates an advice for the designated use of the equipment and/or additional information
to avoid improper handling.
1.3 Safety Advice
W A R N I N G
Disconnect all power to this instrument before opening the housing! Risk of electrical shock!
W A R N I N G
Exercise utmost care when making checks, tests and adjustments that can actuate movable
parts such as feeding devices, gates, flaps, conveyors, etc. Make absolutely sure that nobody
is within reach of movable parts.
W A R N I N G
This unit must not be operated in a potentially explosive atmosphere!
It is the sole responsibility of the user to classify the area of installation and make sure that
absolutely no potentially explosive atmosphere can be present at any time!
CAUTION
Input voltage of the instrument must comply with local mains supply!
10 Technical Manual IT3000A Rev. 4
CAUTION
If the line cord with connector is used as the means to separate the instrument from the mains,
the wall outlet must be installed close to the instrument and must be easily accessible! If a
permanently connected mains cable is used, an easily accessible separator must be included in
the supply circuit!
CAUTION
The power supply unit of the weighing terminal provides SELV voltages in accordance with EN
60950. Make sure that any peripheral device connected to the weighing terminal containing its
own power supply also uses SELV voltages!
CAUTION
This unit must be installed, serviced and operated in strict compliance with all locally applicable
safety regulations and the rules for the prevention of accidents!
CAUTION
When this unit is included as a component part of a system, the resulting system design must
be reviewed by qualified personnel who are familiar with the construction and operation of all
individual components in the system and the potential hazards involved.
CAUTION
If this device is used in an automatic or manual filling cycle, all users must provide a hard wired
emergency stop circuit outside the device circuitry.
CAUTION
This module and its associated equipment must be installed, adjusted and maintained by
qualified personnel only!
Note:
• The unit does not have a mains switch and is operational immediately after connection to the
mains supply!
• Only permit qualified personnel to operate this instrument!
Disconnect all power to this instrument before cleaning and servicing!
• All switch gear connected to the unit and/or installed close to it, such as relays and
contactors, must be fitted with appropriate components (RC-modules, diodes) to suppress
interference.
• In order to avoid static discharge, all metallic parts of a system must be thoroughly grounded.
Movable parts, such as portable scales on plastic wheels, must be grounded with earth clamps
or earth leads of appropriate diameter.
• Keep this manual for future reference!
Technical Manual IT3000A Rev. 4 11
1.4 Declaration Of Conformity
12 Technical Manual IT3000A Rev. 4
2 System Description
The IT3000A is a general purpose weighing terminal for use in a variety of applications such as data
logging, data capturing, parts counting and filling. Depending on the chosen scale interface (ADM or
Dual-ADM) and the selected operating mode, either one or two analog understructures with a total of
up to 16 strain gauge loadcells with an impedance of 350 Ω each can be connected.
The operating modes BASIC, COUNT and ONLINE support the connection of 2 scale bases, whereas
TRUCK, TRUCK/ONLINE, CHECK and FILL are intended for 1 scale base only.
As required for a specific application, plug-on modules for 1 or 2 serial interfaces and 1 module with
2 parallel I/Os or 1 analog output can be added. The integrated clock / RAM module (512kB) provides
powerfail safe date and time function, scale error log, and storage for up to 1000,000 records in a
data archive, 99 first weights (operating mode TRUCK), as well as 9 tare values per scale, 9
reference weights (operating mode COUNT) and 9 product parameters (operating mode FILL).
Power supply through the built-in power supply unit is either for 110 - 240 VAC or 12 - 30 VDC.
Cables of all external components are connected at screw terminals.
Weight and additional information is indicated on a back-lit 20-character LCD, height of characters
14mm. Operation and data entry is made via a sealed membrane keyboard with tactile feedback.
Operation, sequence and printout can be configured for a specific application. All entries required for
the configuration can be made through the keyboard of the terminal. As an alternative, a
comprehensive PC program for configuration and archiving is available.
Instead of operating the terminal locally via keyboard and display, full remote control is possible from
a PC. In applications legal for trade data can also be stored in an approved data archive on the PC's
harddisk.
2.1 Construction
IT3000A is incorporated in a stainless steel housing, protected to IP65, for wall-mount or desk-top
installation. As option, a panel-mount version is available. All cable connections are made at the rear
of the housing through tight cable glands.
See section 'Dimensions' for details.
Technical Manual IT3000A Rev. 4 13
3 Description Of Components
3.1 Main Module CPU3000A
The CPU3000A module is the core of the IT3000A weighing terminal. It contains the microcontroller
with data and program memory. Sockets are provided for the scale interface board ADM (1 scale
base) or Dual-ADM (two scale bases) and the optional installation of 2 serial interfaces (SIM) and 2
parallel I/Os (PIM) or 1 analog output (DAU).
Layout of components on CPU3000A main module:
Power supply unit
Socket for
ADM / Dual-ADM
scale interface
Terminal KL2
interface COM1
Terminal KL3
interface COM2
Terminal KL4
digital inputs/
outputs
Terminal KL6
PE
Terminal KL5
power supply
3.2 Display
To indicate the weight, status information and operator prompts a back-lit 20-character LCD display
is used. The height of characters is 14mm, each character is formed by a matrix of 5x7 dots. The
display is connected at the 16-pin connector X1 on the main module.
By means of the selectable powersave function, backlighting can be switched off after time when the
the terminal is not in use.
14 Technical Manual IT3000A Rev. 4
z
3.3 Power Supply 110 - 240 VAC
The auto sensing switching mode power supply unit operates on an input voltage ranging from 110
Volt (–15%) to 240 Volt (+10%), 50/60 Hz. The output rating is 1A at 5VDC.
W A R N I N G
Parts of the power supply unit are directly connected to dangerously high voltages!
A defective power supply unit can only be replaced. Disconnect all power to the instrument
before servicing!
Position of soldering pins for input and output voltages:
Power supply unit
PE
Terminal KL6
110 V (–15%) to 240 V (+10%),
The power supply has a fused input (2A slow blow).
L1 N
Terminal KL5
50/60H
3.4 Power Supply 12 - 30 VDC
Alternatively, IT3000A is available in a version that operates on 12 V (–15%) to 30 VDC (+10%).
For this version a DC/DC converter is installed on the main module instead of the AC power supply.
The DC version has a fused input (1A slow blow). The output rating of the converter is 5VDC at
600mA.
F1 / 1A
DC/DC
converter
+V 0V
Terminal KL5
12 - 30 VDC
Technical Manual IT3000A Rev. 4 15
4 Installation
4.1 Safety Advice
W A R N I N G
Disconnect all power to the instrument and/or unplug line cord prior to opening the housing!
Failure to observe this precaution could result in bodily injury!
Notes:
• Transport and storage of electronic components such as boards, EPROMs, etc. must only be
made in suitable anti-static ESD bags or cases.
• Shielding measures for the connection of cables must absolutely be adhered to. Insufficient
shielding may cause interference and could result in malfunction of the instrument.
4.2 Setup Of The Instrument
Ambient temperature for operating the unit may range from –10°C to +40°C, at a maximum of
95% relative humidity, without condensation. Exposure to direct sunshine should be avoided.
For wall-mount applications the terminal can be fixed at the wall first, the connection cables can be
fitted later with the lid of the housing removed.
4.3 Opening Of The Housing
To open the housing a size 7mm wrench is required. Please make sure that cables running from the
various modules to display and keyboard are not torn off or damaged when lid is removed.
4.4 Connection Of Cables
All cables are led into the housing through cable glands. Required size of wrenches: PG9 → 17mm;
PG11→ 20mm.
Cable jacket Shield Wires Compression nut Plastic insert Bushing Counter nut
Cable connection through cable glands:
1. Slide compression nut over cable jacket;
2. Slide plastic insert (retainer) over cable jacket until inner end is aligned with cut end of jacket;
3. Unravel shield, bend over retainer and push into retaining comb. Cut wires of shield to length of
comb, avoid protruding wires;
4. Insert retainer with cable into bushing;
5. Screw compression nut onto bushing and use wrench to tighten securely.
W A R N I N G
Cut cable ends as short as possible and make sure that they cannot touch any parts (mains
cable, power supply) conducting mains voltage!
Use cable ends on stranded cables and avoid protruding wires!
16 Technical Manual IT3000A Rev. 4
4.5 Connection Of Scale
4.5.1 Analog Understructures And Loadcells
Connection of weighing platforms and loadcells to the IT3000A terminal is made via an ADM or DualADM scale interface as specified below:
• 1 scale base (ADM), 2 scale bases in switching mode (Dual-ADM)
• Max. 16 strain gauge loadcells 350 Ω each
• Overall impedance 21.5 Ω ...4500 Ω
• W&M approved resolution of 6000d at a max. preload of 80%, internal resolution
524,000d
• Smallest permissible input signal for approved applications: 0.33 µV / e
• Update rate 50 updates / second
• Loadcell excitation: 5 V ±5% (gated power supply).
4.5.2 Connection Of 1 Scale Base Via ADM
Terminal assignment on ADM module:
X2
Connection
to X4 on
CPU3000A
Terminal KL1 Assignment
1 + Excitation
Jumper W1
for protection of
calibration data
1
Terminal KL1
scale base with analog
loadcell(s)
Connection of 4-wire loadcell:
To connect loadcells without sense lines (4-wire connection), two jump leads must be connected at
terminal strip KL1 between terminal 1 and 3, and between terminal 2 and 4.
6
X1
Connection
to X3 on
CPU3000A
2 – Excitation
3 + Sense
4 – Sense
5 + Signal
6 – Signal
Technical Manual IT3000A Rev. 4 17
4.5.3 Connection Of 2 Scale Bases Via Dual-ADM
Terminal assignment on Dual-ADM module
Jumper W1
for protection of
calibration data
1166W1 W2
X2
Connection
to X4 on
CPU3000A
X1
Connection
to X3 on
CPU3000A
Terminal
KL1
1 W1 + Excitation
2 W1 – Excitation
3 W1 + Sense
W1
4 W1 – Sense
5 W1 + Signal
6 W1 – Signal
1 W2 + Excitation
Assignment
Terminal KL1
connection for analog
loadcells scale 1 and 2
Connection of 4-wire loadcell:
W2
2 W2 – Excitation
3 W2 + Sense
4 W2 – Sense
5 W2 + Signal
6 W2 – Signal
To connect loadcells without sense lines (4-wire connection), two jump leads each must be
connected at terminal strip KL1 between terminal 1 and 3 as well as 2 and 4 (scale 1 and 2).
For operation with two scales please note:
Connection of 2 scale bases is only supported by the operating modes BASIC, COUNT,
BASIC/COUNT and ONLINE.
The Dual-ADM module has one A/D converter which is either connected to scale 1 or scale 2 and
which does not permit reading of the two scales in parallel (switching mode only). A summing mode
is not possible. On switching from one scale to the other, new measuring values are determined for
digital filtering and the motion detector, thus it takes approx. 1 sec after switching until a stable
weight can be displayed.
The Dual-ADM module provides hardware detection to tell the operating system that now two scales
are connected. Only then the calibration routines for the second scale can be called up.
4.5.4 Connection Cables
For the installation of connection cables for analog weighing platforms please follow the recommendations listed below:
• Only use suitable loadcell cable, (e.g. SysTec order-No. 10KAB211.
4 x 0.75mm² + 2 x 1mm², shielded,)
Nominal voltage of cable ≥250V.
Unsuitable loadcell cable may affect accuracy.
• The shield of the loadcell cable must be connected all around the cable in the cable gland of
the weighing terminal (see also chapter 'Installation' / 'Connection Of Cables'). If an extension
of the loadcell cable is required use only metal junction boxes and cable glands. The shield on
both sides must be connected in the same way as at the terminal. Loadcells and/or weighing
platforms, junction boxes and the terminal must be included in the potential equalization of
the components of a weighing system. Depending on the situation on site this may require
the installation of a separate earth lead of appropriate diameter (e.g. 16mm²) in parallel to the
loadcell cable.
18 Technical Manual IT3000A Rev. 4
• Distance between loadcell cables and power lines: ≥0.5m. Loadcell cables to be installed in
grounded metal conduits, metal hoses or metal cable trays.
• Maximum length of connection cable between weighing platform and IT3000A: 200m
• If tension load is applied to loadcells instead of compression load, connection for +Signal and
–Signal must be switched.
4.5.5 Multiple-Range Scale
Calibration is possible as Single, Dual or Triple Range Scale. The different ranges have different
capacities and scale intervals.
Example: Triple Range Scale with a resolution of 3000 increments for each range:
First range: 0 – 1500kg / 0.5kg
Second range: 0 – 3000kg / 1.0kg
Third range: 0 – 6000kg / 2.0kg
When a Multiple Range Scale is loaded, the scale display changes automatically from a lower to a
higher range. During unloading of the scale, the scale display remains in the higher range. If the scale
was tared (weighing in net mode), on return to gross zero the tare is only cleared when the tare key
is pressed. Only after clearing the tare, the display returns to gross mode and switches back to the
smallest range.
Automatic switching back to the smallest range on reaching zero is only carried out if the scale was
not tared (weighing in gross mode).
Example of a weight curve for loading and unloading a Multiple Range Scale showing the weight and
the displayed scale interval:
Gross Weight/kg
6000
3000
1500
0
Scale Interval/kg:
0.5 1.0 2.0
0.5
t
When the scale is loaded further after it was tared, the tare weight is rounded automatically to the
next scale interval as soon as the display is switched from one range to the next.
The Multiple Range Scale provides weighing of light and heavy loads on the same scale with a high
degree of accuracy, since each range has a resolution -for instance- of 3000d, inexpensive loadcells
can be used.
For the configuration of a Multiple Range scale all ranges and scale intervals can be chosen freely,
however, the maximum resolution of the loadcells (e.g. 3000d) must not be exceeded in any of the
chosen ranges.
Technical Manual IT3000A Rev. 4 19
4.5.6 Multi-Interval Scale
A Single Range Scale can be configured as Multi-Interval Scale with two or three different interval
ranges.
Example for a Triple Interval Scale:
First interval range: 0kg – 1500kg / 0.5kg
Second interval range: 1500kg – 3000kg / 1.0kg
Third interval range: 3000kg – 6000kg / 2.0kg
The scale display changes automatically from one interval range to the next during loading and
unloading of the scale.
Example weight curve for loading and unloading a Multi Interval Scale showing the weight and the
scale interval displayed:
Net Weight/kg
6000
3000
1500
0
Scale Interval/kg:
0.5 1.0 2.0
1.0
0.5
t
After taring the scale, the scale display shows the net weight with the smallest scale interval. Small
weights are shown with the highest accuracy, even when the scale is already loaded to a higher
weighing range. Restriction: The max. permitted manually entered tare weight must not exceed the
weight of the range with the smallest interval.
For the configuration of a Multi-Interval scale all ranges and scale intervals can be chosen freely.
20 Technical Manual IT3000A Rev. 4
4.5.7 Adaptation To Scale Environment
The following parameters can be set to obtain optimum weighing results:
• Motion window size and number of measurments for motion detector
• Filter strength of the digital filter for unstable scales
• Auto Zero Range for Auto Zero Function
• Pushbutton Zero Range for Zero-key
• Power Up Zero Range
• Overload Threshold for display blanking.
4.5.8 Setting Of Geo Value
Before calibrating the scale, the Geo Value must be entered, e.g. Great Britain = 21 (see also chapter
Geo Values). If the scale is calibrated at one location and moved to another location later, it is
sufficient to re-enter the Geo Value of the new location.
4.5.9 Weights & Measures Approved Applications
The highest W&M certified resolution (Scale Capacity / Scale Interval) is 6000 increments (with a
max. of 80% deadload).
W&M approved installations require parameter setting in the group 'Adaptation' as follows:
• Motion Window: 0.5d
• Motion Counter: ≥7
• Auto Zero Range: 0.5d
• Pushbutton Zero: ±2%
• Power Up Zero: ±2% or ±10% *)
• Overload: max. 9 d
*) Depending on the application, also the setting 'Off' may be acceptable, e.g. for hopper
scales.
Under menu item 'W&M Info' the conformity of settings with W&M requirements can be checked.
The scale settings are stored in an EEPROM and secured with the jumper W1 which can be sealed by
Weights & Measures with thread and lead seal to prevent unauthorized modification.
Technical Manual IT3000A Rev. 4 21
4.5.10 Securing Scale Parameters
The scale parameters are stored in EEPROM and secured with the jumper W1:
ADM
Calibration data secured
W1
1
W1
1
W&M approved applications require that the calibration parameters be protected against unauthorized
modifications. To that effect the jumper can be sealed with thread and lead seal.
6
Dual-ADM
Calibration data of both
scales secured
12
For a description of the scale calibration refer to the respective chapter.
22 Technical Manual IT3000A Rev. 4
4.6 Serial Interfaces
The serial interfaces of the IT3000A terminal can be configured individually by means of plug-on
driver modules as:
RS232 or RS485 2-wire or RS485 4-wire or RS485 2/4-wire optoisolated or 20mA CL (passive).
By default, the interfaces are assigned to: COM1 → PC/EDP, COM2 → printer. The assignment can
be changed in Service Mode to connect other devices such as remote display and reference scale.
4.6.1 Connection Of Serial Interfaces
Connection of serial interfaces on the main module:
> RS232
Terminal strip
KL2
Terminal assignment interface #1 and #2:
Terminal strip KL2: serial interface #1 (COM1)
Terminal strip KL3: serial interface #2 (COM2)
Terminal # RS232 20mA RS485
1 TxD TXIN TxD+ TxD+ / RxD+
2 RTS TXOUT TxD– TxD– / RxD–
3 RxD RXIN RxD+ —
4 CTS RXOUT RxD– —
5 Gnd — — —
Terminal strip
KL3
4-wire
Insert with
notch pointing
to bottom!
RS485
2-wire
4.6.2 SIM RS485.OPTO
The SIM RS485.OPTO interface driver is autosensing and provides both, 2-wire and 4-wire
communication.
Please note: This module cannot be inserted in socket SIM 1 when a Dual-ADM board is installed.
Technical Manual IT3000A Rev. 4 23
4.6.3 RS485 Network
Terminal assignment: Some manufacturers of components with RS485 interface do not refer to the
terminals TX+ and RX+ as 'A', but 'B' instead (correspondingly, the terminals TX- and RX- are not
referred to as 'B', but 'A').
Termination resistors: In order to prevent reflection (baud rate 19200 Baud or higher, and/or cable
longer than 20m) it is recommended to install termination resistors R
cable. The characteristic impedance of the cable should be approx. 150 Ω.
Pull-up / pull-down resistors: When termination resistors are used, also 390 Ω pull-up and pull-down
resistors must be installed at the master (see also following schematic).
RS 485 network with termination-, pull-up- and pull-down- resistors
V
CC
390
Ω
150
Ω
Term = 150 Ω on both ends of the
150
Ω
390
390
150
390
RS485 4-wire
Ω
Gnd
V
CC
Ω
Ω
Ω
Gnd
−
TxB (Tx )
TxA (Tx+)
−
RxA (Rx+)
RxB (Rx )
−
RxA (Rx+)
RxB (Rx )
−
TxA (Tx+)
TxB (Tx )
RxA (Rx+)
150
Ω
−
RxB (Rx )
−
TxA (Tx+)
TxB (Tx )
RS485 2-wire
A (Tx+ / Rx+)
Master (e.g. PC, PLC or
Process Control System)
Participant
A (Tx+ / Rx+)
Slave 1
− / −
B (Tx Rx )
− / −
A (Tx+ / Rx+)
B (Tx Rx )
Slave n
(Weighing Terminal IT)
− / −
B (Tx Rx )
(Weighing Terminal IT)
24 Technical Manual IT3000A Rev. 4
4.6.4 Cables For Serial Interfaces
Standard cables for serial interfaces:
IT3000
TxD 1
RTS 2
RxD 3
CTS 4
Gnd 5
IT3000
TxD 1
RTS 2
RxD 3
CTS 4
Gnd 5
RS232 Printer Cable with 25-pin DSUB connector
Art.-No. 10KAB200
green
yellow
brown
white
gray
RS232 PC Cable with 9-pin male DSUB connector
Art.-No. 10KAB202
green
yellow
brown
white
gray
male
Printer
3 RxD
5 CTS
2 TxD
20 DTR
7 Gnd
PC
2 RxD
8 CTS
3 TxD
7 RTS
5 Gnd
1
4
6
approx. 3m
For the installation of connection cables for serial interfaces please follow the recommendations listed
below:
• Install data cables to prevent capacitive or inductive interference from other cables, machines
and/or electrical devices that could interrupt data transmission and lead to loss of data. If
fluctuation of the earth potential is experienced, this can cause an equalization current flowing
over the shield. In this case a separate earth lead of appropriate diameter for potential equalization
is required.
• Non-factory made cables must comply with the following specification:
3 times twisted pair plus screen, e.g. LIYCY 3 x 2 x 0.14mm² or LIYCY 3 x 2 x 0.25mm²,
For maximum suppression of interference, shield should be grounded on both sides.
Resistance ≤ 125 Ω/km
2
Gauge ≥0.14 mm
up to 200m, ≥0.25 mm2 up to 1200m
Capacitance ≤ 130 nF/km
Length RS232 max. 15m
Length RS485 max. 1200m
Impedance RS485 approx. 150 Ω
Nominal voltage ≥ 250V
Technical Manual IT3000A Rev. 4 25
4.7 Connection Of Parallel I/Os
The parallel input/outputs on the CPU3000A can be activated by inserting a plug-on module. The
module provides drivers for two opto-isolated inputs and two opto-isolated outputs.
Rating of outputs: 24VDC, 100mA; rating of inputs: 7mA @ 24VDC.
Principal schematics:
OUT+
+
-
OUT0
OUT1
Parallel output Parallel input
Position and assignment of parallel inputs/outputs on CPU3000A board:
Ri
3K3
IN1
IN0
IN–
PIM
+
-
> PIM
Insert with
notch pointing
to bottom!
Terminal strip KL4
Terminal assignment:
Terminal strip KL4: parallel inputs and outputs
1 OV
2 +10V for external switches only!
3 IN0
4 IN1
5 In– for IN0 - IN1
6 OUT0
7 OUT1
8 OUT+ for OUT0 - OUT1
Note: The internal 10VDC supply (KL4, terminal 2) may be used to connect switches and push
buttons to the digital inputs (15mA max.). The step-up regulator that generates this voltage is short
circuit proof for 1 sec max. External devices connected to the digital outputs must always be
supplied from an external 24VDC power supply.
26 Technical Manual IT3000A Rev. 4
4.8 Connection Of 8-Bit Analog Output DAU
For the output of gross or net weight as analog signal a plug-on module (DAU) can be inserted
instead of a parallel driver module. The output signal has a resolution of 8 bit (256 steps, limits of
operating error = ±4%). The input of the connected device must be electrically isolated and must
not be connected to ground.
Digital inputs/outputs via PIM module and analog output are not possible at the same time.
Position and assignment of analog output on CPU3000A board:
> DAU
PIM1
Insert w ith
notch pointing
to bott om!
Terminal strip KL4
The analog output module can be configured to current output (factory setting) or to voltage output
via solder bridge. Two more solder bridges serve to select internal or external power supply.
Position of solder bridges on DAU:
W1
W3
1
Configuration of DAU via solder bridges W1, W2 and W3.
W1 closed / W2 open W1 open / W2 closed
W3 open Current output 0 - 20 mA
internal power supply
maximum load: 120 Ω
W2
Current output 0 - 20 mA
external power supply 15 - 30 V
maximum load: 750 Ω
W3 closed not allowed! Voltage output 0 - 10 V
Note: Only bridge W1 or W2 may be closed!
external power supply 15 - 30 V
min. input resistance 3.3 kΩ
Technical Manual IT3000A Rev. 4 27
If the analog driver is configured accordingly, the settings in Service Mode, group 'General' 0 - 20
mA or 4 - 20 mA also apply to the voltage output 0 - 10 V or 2 - 10 V.
Terminal assignment:
Terminal strip KL4: analog output DAU
1 must remain free
2 must remain free
3 Uext voltage input when external supply 15 - 30 V is used
4 Gnd ground for exernal supply and voltage output
5 must remain free
6 I– current output
7 I+/U+ current or voltage output
8 must remain free
Example for current output 0 - 20 mA, supply of loop from IT3000A:
3
4
W1 closed
W2
W3 open
> DAU
open
IT3000 KL4
7
+
120 max.
–
6
Example for current output 0 - 20 mA, supply of loop from external power supply:
W1 open
W2 closed
W3 open
> DAU
Gnd
IT3000 KL4
3
4
7
+
–
6
+15 - 30 VDC
external power supply
potential free
0 V
750 max.
Example for voltage output 0 - 10 V, external power supply:
3
4
W1 open
W2 closed
W3 closed
> DAU
Gnd
IT3000 KL4
7
+
6
+15 - 30 VDC
external power supply
potential free
0 V
3.3 k min.
28 Technical Manual IT3000A Rev. 4
4.9 Connection Of 15-Bit Analog Output DAU15
For the output of gross or net weight as analog 15-bit signal a plug-on module (DAU15) can be
inserted instead of a parallel driver module in socket PIM1. The output signal has a resolution of 15
bit (32768 steps). The module can be configured in group 'DAU' of the Service Mode to 0/2 - 10V or
0/4 - 20mA. The output of the DAU15 module is active and potential free.
Digital inputs/outputs via PIM module and analog output are not possible at the same time.
Position and assignment of analog output DAU15 on CPU3000A board:
> DAU 15
PIM1
Insert w ith
notch pointing
to bott om!
Terminal strip KL4
Technical Manual IT3000A Rev. 4 29
Terminal assignment:
Terminal strip KL4: analog output DAU15
1
2
3 I+ Current output 0/4 - 20mA
4 I– Gnd for current output 0/4 - 20mA
5
6 U+ Voltage output 0/2 - 10V
7 U– Gnd for voltage output 0/2 - 10V
8
Example for current output 0/4 - 20 mA:
Example for voltage output 0/2 - 10 V:
30 Technical Manual IT3000A Rev. 4
4.10 Mains Connection
Before connecting the instrument to power please note:
• Input voltage of the instrument must comply with local mains supply. Factory setting: 110 - 240
V; 50/60Hz, line cord with safety plug firmly connected. The DC version does not have a line
cord and is intended for connection to 12 V to 30V DC.
• Install mains supply for the instrument separate from supply for machines and equipment
generating noise and/or interference (motors, relays, heatings, etc.). Even short spikes and/or
drop-outs may affect the correct function of the instrument and result in defects. If problems of
that nature are encountered, the installation of a voltage stabilizer or an uninterruptable power
supply unit (UPS) may help to overcome the difficulties.
• IT3000A does not have a mains switch and is operational after connection to the mains supply.
Connection to the mains supply is made via the factory installed line cord (length of cable 2.5m).
Make sure that wall outlet is correctly grounded (not applicable to DC version).
• If the line cord with connector is used as the means to separate the instrument from the mains,
the wall outlet must be installed close to the instrument and must be easily accessible! If a
permanently connected mains cable is used, an easily accessible separator must be included in
the supply circuit!
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