Western Scale M2000 User manual

DIGITAL WEIGHING SYSTEM
SECTIONAL TRUCK SCALE INSTALLATION GUIDE
FOR SOFTWARE VERSION 1.21 (MAY 2003)

M2000 DIGITAL WEIGHING SYSTEM
SECTIONAL TRUCK SCALE INSTALLATION GUIDE
Copyright © 2003 Western Scale Company Limited. All rights reserved.
Published by:
WESTERN SCALE CO. LTD.
1670 Kingsway avenue
Port Coquitlam, B.C.
Canada
V3C 3Y9
Information in this Installation Guide is subject to change without notice due to
correction or enhancement. The information described in this manual is the
property of Western Scale. No part of this manual may be reproduced or
transmitted in any form, without the express written permission of Western Scale.
Western Scale Locations
Western Scale Co. Ltd.
1670 Kingsway Avenue
Port Coquitlam, B.C.
Canada
V3C 3Y9
www.westernscale.ca
[e-mail]
Wescale Inc.
DIVISION OF WESTERN SCALE
3873 Airport Way
Bellingham, WA.
USA
98227 - 9754
www.wescale.com
[e-mail]
FOR TECHNICAL SUPPORT REGARDING THIS PRODUCT, PLEASE CALL:
1-604-941-3474

TABLE OF CONTENTS
Introduction…………………………………………………………………………………. 1
Installation Strategies…………………………………………………………….. 2
System Grounding……………………………………………………………….. 3
Getting Started…………………………………………………………………………… 4
Setting the DLC ID Jumper……………………………………………………… 5
Wiring Loadcells to the DLC Smart Box………………………………………… 6
Wiring DLC Smart Boxes to the M2000D Indicator…………………………….. 7
Other Wiring to the M2000D Indicator………………………………………….. 9
Powering Up the Indicator for the First Time…………………………………… 10
LEDs on Power Up……………………………………………………………… 10
Calibration Mode……………………………………………………………………….. 11
Entering Into Calibration Mode…………………………………………………. 11
Entering Calibration Commands………………………………………………… 11
Setting Graduation Size…………………………………………………………. 12
Setting Scale Capacity………………………………………………………….. 12
Setting Calibration Units………………………………………………………… 12
Allocating Sections……………………………………………………………… 13
Deadloading the Scale…………………………………………………………… 13
Spanning a Scale with a Test Weight…………………………………………… 14
Exit Calibration Mode…………………………………………………………… 14
Navigating the M2000………………………………………………………………….. 15
Select a Section or Cell…………………………………………………………. 16
Quick Select Method (For Sections)…………………………………………….. 17
Sectional Adjustment……………………………………………………………. 17
Example…………………………………………………………………. 18
Corner & Side-to-Side Adjustments…………………………………………….. 18
Serial Communications………………………………………………………………….. 19
Data Bits…………………………………………………………………………. 19
Baud Rate……………………………………………………………………….. 19
Parity…………………………………………………………………………….. 20
String Formats for Continuous Output………………………………………….. 20
Serial Handshaking……………………………………………………………… 21
Com Port String Output Mode…………………………………………………... 21
Configuring Com Ports to Transmit in RS422 Mode…………………………… 21
Transmission Delay for Com1 & Com2………………………………………… 22
M2000D System Specifications…………………………………………………………. 23
Appendix A - M2000 Parameters……………………………………………………….. 24
Appendix B - M2000D Specific Parameters……………………………………………. 26
Appendix C – Error Messages………………………………………………………….. 27

DIGITAL WEIGHING SYSTEM
1
INTRODUCTION
The M2000D Digital Smart Weigh System utilizes Digital Load Cell (DLC)
technology to provide high-level data integrity, easier maintenance, and lightning
protection for your weighing applications. Load cell connections to the DLC
Smart Box (mounted on the weighbridge) are the same as connections to
traditional analog summation cards. There are no pots to adjust and all sectional
adjustments are made digitally through the keypad on the M2000D indicator.
Each DLC Smart Box is available with 4, 6, or 8 load cell channels (inputs). The
M2000D indicator can support up to 2 DLC Smart Boxes for a maximum of 16
load cells (8 Sections) per scale system. DLC Smart Boxes communicate with
the indicator digitally through a current loop interface, resulting in no data
degradation for up to 1000 feet. The cable link between the M2000D indicator
and the DLC Smart Box is optically isolated and contains surge suppression
devices to help protect the scale from lightning damage.
DLC SMART BOX

2
SECTIONALTRUCKSCALE INSTALLATIONGUIDE
INSTALLATION STRATEGIES
1. Mount the DLC Smart Boxes as close as possible to the weighing
platform.
2. The DLC Smart Boxes must be mounted in a NEMA rated enclosure,
as the modules themselves are not watertight.
3. Keep cable runs between load cells and the DLC Smart Boxes as short
as possible, to help eliminate the contamination of analog load cell
signals by RFI and EMI interference.
4. Identify the end of the scale where Section 1 will be located. The DLC
Smart Box that connects to Section 1 will be configured as the Primary
DLC.
5. Observe the green Cell/Section label on the DLC Smart Box. This
label is a miniature diagram of your scale. Where the loadcell is
physically connected becomes its “Electronic Address” when
navigating the scale elements during calibration.
M2000D INDICATOR

DIGITAL WEIGHING SYSTEM
3
SYSTEM GROUNDING
The M2000 Digital System provides state of the art lightning surge protection. In
order for surge conditions to be diverted properly, a good earth ground path must
be in place. Since the M2000D indicator is optically isolated from the DLC
modules, both ends should be grounded to a good earth connection.
In most cases, the DLC Smart Box modules will be grounded to the steel
structure of the weighing platform with a braided Earth Strap. The steel frame
should be connected to a ground rod planted in the earth next to the weighing
platform. Earth Straps should be at least 8 AWG thick and preferably no longer
than 2 feet. The Earth Strap should be kept as straight as possible to reduce any
loops or kinks which may cause inductive resistances to the earth ground
discharge path.
EXAMPLE:
GROUND WIRE
FIRMLY CONNECTED
TO DLC SMART BOX
GROUND LUG
(Fig. 1)
SCALE GROUNDING
DIAGRAM (SAMPLE)

4
SECTIONALTRUCKSCALE INSTALLATIONGUIDE
GETTING STARTED
The most common Sectional Truck Scale installations have 4 sections with a
total of 8 loadcells. Due to manufacturing preferences and loadcell cable
lengths, 2 DLC Smart Box modules, each wired to 4 loadcells (2 sections) are
typically used. This type of installation will be the default example for this
guide.
• It is good practice to think of the green Cell/Section label on the DLC
Smart Box as a miniature diagram of the scale. Where a loadcell is
physically wired becomes its “Electronic Address”, used to identify the
scale elements during calibration.
• The loadcell pair comprising the 1st Section of the scale MUST ALWAYS
be wired into the connectors labeled CELL1 & CELL2. This DLC Smart
Box will be the “Primary” DLC.
• Wire the rest of the sections the same way, with odd numbered cells on
one side, even numbered cells on the other. In the case of two DLC
modules, loadcell numbering will restart at 1 on the Secondary DLC
module. (See Navigating the M2000)
Section 
Cell Section  Cell 
Section 
Cell Section  Cell 
Section 
Cell Section 
Cell 
Section 
Cell 
Section 
Cell 
4 SECTION SCALE
(Fig. 2)

DIGITAL WEIGHING SYSTEM
5
SETTING THE DLC ID JUMPER
When using two DLC Smart Boxes, the M2000D indicator needs to differentiate
between the Primary and Secondary modules. An ID switch must be set via
the ID jumpers in the bottom right hand corner of each module. For
systems utilizing only one DLC Smart Box, the jumpers must be in the “Primary”
position.
• It is extremely important to note which module is the PRIMARY DLC as it
ALWAYS identifies the first section of the scale.
• There cannot be two primary (or two secondary) DLC Smart boxes.
Setting the switches properly is crucial for the system to function.
ID select
JP 1
PRIM
SEC
ID select
JP 1
PRIM
SEC
JUMPER
THESE TWO
PINS FOR
PRIMARY
DLC
JUMPER
THESE TWO
PINS FOR
SECONDARY
DLC
NOTE: If changing the DLC ID jumper after the initial scale setup,
the indicator must be in Calibration Mode as jumper settings are
stored with Calibration data.
(Fig. 3)

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SECTIONALTRUCKSCALE INSTALLATIONGUIDE
WIRING LOAD CELLS TO THE DLC SMART BOX
Load cells are wired to the DLC Smart Box using 5 pin terminal connectors. The
connectors can be unplugged from the DLC to make wiring easier. The Primary
DLC Smart Box will always contain Section 1.
Loadcell connections are labeled as follows:
- EXC Negative Excitation
+ EXC Positive Excitation
SHLD Loadcell Shield
- SIG Negative Signal
+ SIG Positive Signal
Loadcell pairs in a section must be wired directly across from each other on the
DLC Smart Box. Sections are marked on the DLC module for easy reference.
(See Figure 2.)
-EXC
+EXC
-SIG
+SIG
SHLD
CELL 1
Note: The DLC Smart Box does not include SENSE line terminals
for load cells. For connecting a 6 conductor load cell cable to a DLC
terminal, it is recommended that the +SENSE and +EXCITATION
conductors to be joined together and the –SENSE and –
EXCITATION conductors to be joined together respectively.
(Fig. 4)