Hardy Process Solutions C Series Specification sheet

HI 1746-WS
WEIGH SCALE MODULE
OPERATION AND INSTALLATION
MANUAL
Series C
Corporate Headquarters
10075 Mesa Rim Road
San Diego, CA 92121
Phone: [phone]
Web-Site: https://www.hardysolutions.com
Hardy Process Solutions Document Number: 0596-0234-01 Rev J
Copyright 2011 - 2023 Hardy Process Solutions, Inc. All Rights Reserved. Printed in the U.S.A. (941028)

Local Field Service
Hardy has over 200 field technicians in the U.S., and more positioned
throughout the world to assist you in your support needs. We also have fac-
tory engineers who will travel to your facility anywhere in the world to help you
solve challenging applications. We're ready to support you with:
•Installation and start-up
•Routine maintenance and certification
•Plant audits and performance measurement
•Emergency troubleshooting and repair
Torequest Emergency Service and Troubleshooting, Start-up, Installation,
Calibration, Verification or to discuss a Maintenance Agreement please call
800-821-5831 Option 4 or Emergency Service after hours (Standard Hours
6:30 AM to 5:30 PM Pacific Standard Time) and weekends.
Outside the U.S
Hardy Process Solutions has built a network of support throughout the globe.
For specific field service options available in your area please contact your
local sales agent or our U.S. factory at [phone], Option 4

Table of Contents
i
Table of Contents
TABLE OF CONTENTS - - - - - - - - - - - - - - - - - - - - - -I
TABLE OF ILLUSTRATIONS - - - - - - - - - - - - - - - - - - -I
CHAPTER 1 - OVERVIEW - - - - - - - - - - - - - - - - - - - - -1-1
A Brief Description of Chapter 1 - - - - - - - - - - - - - - - - - -1-1
About Hardy Manuals - - - - - - - - - - - - - - - - - - - - - - -1-2
Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1-2
WAVERSAVER®- - - - - - - - - - - - - - - - - - - - - - - - - -1-3
C2®Calibration - - - - - - - - - - - - - - - - - - - - - - - - - -1-4
IT® - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1-4
Excitation Monitor - - - - - - - - - - - - - - - - - - - - - - -1-4
Digital Volt Meter (DVM) - Optional - - - - - - - - - - - - - - -1-5
Return to Zero Test - Optional - - - - - - - - - - - - - - - - -1-5
Weighing System Tests - Optional - - - - - - - - - - - - - - -1-5
Auto Zero Tracking - - - - - - - - - - - - - - - - - - - - - - -1-6
Set Point TTL Outputs - - - - - - - - - - - - - - - - - - - - -1-6
CHAPTER 2 - SPECIFICATIONS - - - - - - - - - - - - - - - - -2-1
A Brief Description of Chapter 2 - - - - - - - - - - - - - - - - - -2-1
Specifications for a Standard HI 1746-WS Weigh Scale Module - - -2-1
Modes of Operation - - - - - - - - - - - - - - - - - - - - - -2-1
Conversion Rate - - - - - - - - - - - - - - - - - - - - - - - -2-1
Averages - - - - - - - - - - - - - - - - - - - - - - - - - - -2-1
Resolution - - - - - - - - - - - - - - - - - - - - - - - - - - -2-1
Input - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2-1
Non-Linearity - - - - - - - - - - - - - - - - - - - - - - - - -2-1
Maximum Zero Tolerance - - - - - - - - - - - - - - - - - - -2-1
WAVERSAVER®- - - - - - - - - - - - - - - - - - - - - - - -2-1
Excitation Monitor - - - - - - - - - - - - - - - - - - - - - - -2-1
Common-Mode Rejection - - - - - - - - - - - - - - - - - - -2-2
Common-Mode Voltage Range - - - - - - - - - - - - - - - - -2-2
Backplane Input Voltage - - - - - - - - - - - - - - - - - - - -2-2
Backplane Current Load - - - - - - - - - - - - - - - - - - - -2-2
Power - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2-2
C2 Calibration Input - - - - - - - - - - - - - - - - - - - - - -2-2
Cable lengths - - - - - - - - - - - - - - - - - - - - - - - - -2-2
Load Cell Excitation - - - - - - - - - - - - - - - - - - - - - -2-2
C2 Calibration Output - - - - - - - - - - - - - - - - - - - - -2-2
Set Point (1 & 2) Out - - - - - - - - - - - - - - - - - - - - - -2-2
Environmental Requirements - - - - - - - - - - - - - - - - - - - -2-2

HI 1746-WS WEIGHT SCALE MODULE
ii
Temperature Coefficient - - - - - - - - - - - - - - - - - - - -2-2
Operating Temperature Range - - - - - - - - - - - - - - - - -2-2
Storage Temperature Range - - - - - - - - - - - - - - - - - -2-2
Humidity Range - - - - - - - - - - - - - - - - - - - - - - - -2-2
Approvals - - - - - - - - - - - - - - - - - - - - - - - - - - -2-3
Digital Voltmeter - - - - - - - - - - - - - - - - - - - - - - - -2-3
Optional Equipment HI 215IT Junction Box - - - - - - - - - - - - -2-3
IT Junction Box HI 215IT-SS or PS Series - - - - - - - - - -2-3
Case Dimensions - - - - - - - - - - - - - - - - - - - - -2-3
Weight - - - - - - - - - - - - - - - - - - - - - - - - - - -2-3
Enclosure Ratings - - - - - - - - - - - - - - - - - - - - -2-3
IT Junction Box HI 215IT-FG Series - - - - - - - - - - - - - -2-3
Case Dimensions - - - - - - - - - - - - - - - - - - - - -2-3
Weight - - - - - - - - - - - - - - - - - - - - - - - - - - -2-3
Enclosure Rating - - - - - - - - - - - - - - - - - - - - - -2-3
Configuration Software for Windows - - - - - - - - - - - - - -2-3
Default Parameters - - - - - - - - - - - - - - - - - - - - - - - -2-4
CHAPTER 3 - INSTALLATION - - - - - - - - - - - - - - - - - - -3-1
A Brief Description of Chapter 3 - - - - - - - - - - - - - - - - - -3-1
Unpacking - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-1
Installing the HI 1746-WS into an Allen-Bradley SLC 500
Processor or Allen-Bradley Remote Rack - - - - - - - - - - - - -3-1
Setting the Jumper for Local or Remote Mode of Operation - - -3-2
Installing the HI 1746-WS into the SLC 500 or Remote
Chassis - - - - - - - - - - - - - - - - - - - - - - - - - - -3-3
Removing the Module from the SLC 500 or Remote Chassis - - - -3-5
Installing the Module I/O Connector - - - - - - - - - - - - - - - - -3-6
About the Module I/O Connector - - - - - - - - - - - - - - - -3-6
Load Cell Wiring Diagrams - - - - - - - - - - - - - - - - - - - - -3-7
Industry Standard Load Cells - - - - - - - - - - - - - - - - - -3-8
Hardy Load Sensor with C2 - - - - - - - - - - - - - - - - - -3-9
Hardy HI 215IT Junction Box - - - - - - - - - - - - - - - - - -3-9
Installing the Hardy Configuration Software (Optional) - - - - - - - -3-10
CHAPTER 4 - SETUP - - - - - - - - - - - - - - - - - - - - - - -4-1
A Brief Description of Chapter 4 - - - - - - - - - - - - - - - - - -4-1
Power Check - - - - - - - - - - - - - - - - - - - - - - - - - - -4-1
LEDS - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-2
Run/Fault LED - - - - - - - - - - - - - - - - - - - - - - -4-2
Comm. LED - - - - - - - - - - - - - - - - - - - - - - - -4-2
C2 LED - - - - - - - - - - - - - - - - - - - - - - - - - -4-2
Setting Up Communications Between the SLC and the

Table of Contents
iii
HI 1746-WS Weigh Scale Module - - - - - - - - - - - - - - - -4-2
Local Mode of Operation - - - - - - - - - - - - - - - - - - - -4-3
Remote Mode of Operation - - - - - - - - - - - - - - - - - - -4-3
About M Files - - - - - - - - - - - - - - - - - - - - - - - - - - -4-3
Direct M File Mapping - - - - - - - - - - - - - - - - - - - - - - -4-3
Local Mode of Operation - - - - - - - - - - - - - - - - - - - -4-3
Remote Mode of Operation - - - - - - - - - - - - - - - - - - -4-5
M File Interface to Set Up for Local Mode of Operation - - - - - - -4-5
M File Data Structure (Words 0 to 5) - - - - - - - - - - - - - -4-5
Logical File Interface to Set Up for Remote Mode of
Operation (8 Word) - - - - - - - - - - - - - - - - - - - - - - -4-6
About Logical Files - - - - - - - - - - - - - - - - - - - - - - -4-6
Command Word Encoding - - - - - - - - - - - - - - - - - - -4-7
Bits 15 & 14 - - - - - - - - - - - - - - - - - - - - - - - -4-7
Bits 8-13 - - - - - - - - - - - - - - - - - - - - - - - - - -4-7
Bits 0-7 - - - - - - - - - - - - - - - - - - - - - - - - - -4-7
Writing to the 32 Word Logical O and logical M0 files - - - - - -4-8
Command Word - - - - - - - - - - - - - - - - - - - - - - - -4-8
Writing to the M0 file - - - - - - - - - - - - - - - - - - - -4-8
For Example - - - - - - - - - - - - - - - - - - - - - - - -4-8
Writing to the O file - - - - - - - - - - - - - - - - - - - - -4-8
For Example - - - - - - - - - - - - - - - - - - - - - - - -4-8
Words 1-7 - - - - - - - - - - - - - - - - - - - - - - - - -4-8
Reading from the 32 Word Logical I and logical M1 files - - - - -4-9
Command Word - - - - - - - - - - - - - - - - - - - - - - - -4-9
Bits 15-14 set to “10” - - - - - - - - - - - - - - - - - - - -4-9
For Example - - - - - - - - - - - - - - - - - - - - - - - -4-9
Bits 15-14 set to “11” - - - - - - - - - - - - - - - - - - - -4-9
For Example - - - - - - - - - - - - - - - - - - - - - - - -4-9
Bits 15-14 set to “01” - - - - - - - - - - - - - - - - - - - -4-9
Bits 15-14 set to “00” - - - - - - - - - - - - - - - - - - - -4-9
Executable Command List - - - - - - - - - - - - - - - - - - - - -4-10
Zero Command (ZEROCMD) - - - - - - - - - - - - - - - - - -4-10
Tare Command (TARECMD) - - - - - - - - - - - - - - - - - -4-10
Write Non-Volatile Command (WRITENONVOLATILE) - - - - -4-11
Reload Non-Volatile (RELOADNONVOLATILE) - - - - - - - - -4-11
Float Integer to Integer Conversion Command (FLOAT2INT) - -4-12
Integer to Float Integer Conversion Command (INT2FLOAT) - -4-12
Cal Low Command (CALLOWCMD) - - - - - - - - - - - - - -4-13
Cal High Command (CALHIGHCMD) - - - - - - - - - - - - - -4-13
C2 Cal Command (C2CALCMD) - - - - - - - - - - - - - - - -4-13
Read C2 Serial Number Command (READC2SERIALNUM) - -4-14
Set Parameters Command (SETPARAM) - - - - - - - - - - - -4-14

HI 1746-WS WEIGHT SCALE MODULE
iv
Get Parameters Command (GETPARAM) - - - - - - - - - - -4-15
I/O Setup Ladder Logic for Remote Mode Operation - - - - - -4-16
HI WS100 Configuration Software Interface (Remote Mode
of Operation) - - - - - - - - - - - - - - - - - - - - - - - - - - -4-18
Setting The Process Weighing Parameters - - - - - - - - - - - - -4-20
About the Ladder Logic Example - - - - - - - - - - - - - - - -4-20
Weight Multiplier - - - - - - - - - - - - - - - - - - - - - - - -4-20
SETPARAM - GETPARAM Command and Non Volatile
Memory - - - - - - - - - - - - - - - - - - - - - - - - - - -4-21
Possible Error Returns - - - - - - - - - - - - - - - - - - -4-21
Setting Parameters Ladder Logic Explanation - - - - - - - - - -4-22
SETPARAMS Local Mode of Operation - - - - - - - - - - -4-23
SETPARAMS Remote Mode of Operation - - - - - - - - -4-24
Error Code List - - - - - - - - - - - - - - - - - - - - - - - - -4-28
Calibration Setup Procedures - - - - - - - - - - - - - - - - - - -4-28
Setting the Unit of Measure - - - - - - - - - - - - - - - - - - -4-28
Setting the Motion Tolerance Value - - - - - - - - - - - - - - -4-28
Setting the Zero Tolerance Value - - - - - - - - - - - - - - - -4-29
Setting the Auto Zero ToleranceValue - - - - - - - - - - - - -4-29
Setting the Number of Readings Averages - - - - - - - - - - -4-29
Setting the Span Weight Value - - - - - - - - - - - - - - - - -4-29
Setting the WAVERSAVER Value - - - - - - - - - - - - - - -4-29
CHAPTER 5 - CALIBRATION - - - - - - - - - - - - - - - - - - -5-1
A Brief Description of Chapter 5 - - - - - - - - - - - - - - - - - -5-1
Pre-Calibration Procedures - - - - - - - - - - - - - - - - - - - - -5-1
Electrical Check Procedures - - - - - - - - - - - - - - - - - - - -5-2
Load Cell/Point Input/Output Measurements - - - - - - - - - -5-2
Load Check - - - - - - - - - - - - - - - - - - - - - - - - - - - -5-4
C2 Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - -5-4
About C2 Calibration - - - - - - - - - - - - - - - - - - - - - -5-4
“THE BUTTON” C2 Calibration - - - - - - - - - - - - - - - - -5-5
C2 LED - - - - - - - - - - - - - - - - - - - - - - - - - -5-6
C2 Calibration Using Ladder Logic - - - - - - - - - - - - - - -5-6
Data Locations Used for Ladder Logic Examples (For Local
Mode of Operation Only) - - - - - - - - - - - - - - - - - - - - -5-6
N9:0 - 24 - - - - - - - - - - - - - - - - - - - - - - - - - - - -5-6
N9:50 - - - - - - - - - - - - - - - - - - - - - - - - - - - - -5-6
N9:51 - - - - - - - - - - - - - - - - - - - - - - - - - - - - -5-6
N10:0 - 2 - - - - - - - - - - - - - - - - - - - - - - - - - - - -5-6
N10:40 - 46 - - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:60 - 72 - - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:60 - - - - - - - - - - - - - - - - - - - - - - - - - -5-7

Table of Contents
v
N10:61 - - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:62 - - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:63-64 - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:65-66 - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:67-68 - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:69-70 - - - - - - - - - - - - - - - - - - - - - - - - -5-7
N10:71-72 - - - - - - - - - - - - - - - - - - - - - - - - -5-7
C2 Calibration Ladder Logic Explanation - - - - - - - - - - - -5-7
C2 Calibration Ladder Logic Example (For Local
Mode of Operation Only) - - - - - - - - - - - - - - - - -5-8
C2 Calibration Ladder Logic Example (For Remote
Mode of Operation Only) - - - - - - - - - - - - - - - - -5-11
Hard Calibration - - - - - - - - - - - - - - - - - - - - - - - - - -5-12
Hard Calibration Ladder Logic Example - - - - - - - - - - - -5-12
CHAPTER 6 - OPERATING PROCEDURES - - - - - - - - - - - -6-1
A Brief Description of Chapter 6 - - - - - - - - - - - - - - - - - -6-1
Block Transfer, Read - - - - - - - - - - - - - - - - - - - - - - - -6-1
Block Transfer, Read Example (For Local Mode Only)
(READWEIGHT) - - - - - - - - - - - - - - - - - - - - - - - - -6-5
Explanation of the READWEIGHT Example - - - - - - - - - -6-5
READWEIGHT Ladder Logic Example - - - - - - - - - - - - -6-6
Block Transfer, Read Ladder Logic Example for Remote
Mode Operation - - - - - - - - - - - - - - - - - - - - - - - - -6-6
Block Transfer, Write - - - - - - - - - - - - - - - - - - - - - - - -6-7
Block Transfer, Write Ladder Logic Example for Remote
Mode Operation - - - - - - - - - - - - - - - - - - - - - - - - -6-9
INDEX

HI 1746-WS WEIGHT SCALE MODULE
vi

Table of Illustrations
I
Table of Illustrations
CHAPTER 3 - INSTALLATION - - - - - - - - - - - - - - - - - - -3-1
FIG. 3-1 HI 1746-WS WEIGH MODULE IN PROPER
ORIENTATION - - - - - - - - - - - - - - - - - - -3-2
FIG. 3-2 JUMPER LOCATION/JUMPER SET IN THE
DEFAULT OFF (LOCAL MODE) POSITION - - - - -3-3
FIG. 3-3 POSITIONING THE MODULE FOR INSTALLATION - - -3-4
FIG. 3-4 MODULE RELEASE(S) - - - - - - - - - - - - - - - - -3-5
FIG. 3-5 MODULE INSTALLED IN SLC CHASSIS - - - - - - - -3-5
FIG. 3-6 MODULE WITH DOOR OPEN - - - - - - - - - - - - - -3-7
FIG. 3-7 INDUSTRY STANDARD LOAD CELLS WIRING
DIAGRAM - - - - - - - - - - - - - - - - - - - - - -3-8
FIG. 3-8 HARDY LOAD SENSOR/C2 WIRING DIAGRAM - - - - -3-9
FIG. 3-10 HARDY HI 215IT JUNCTION BOX WIRING DIAGRAM -3-9
CHAPTER 4 - SETUP - - - - - - - - - - - - - - - - - - - - - - -4-1
FIG. 4-1 MODULE LEDS - - - - - - - - - - - - - - - - - - - - -4-2
FIG. 4-2 PRIMARY AND REMOTE COMMUNICATION
DIAGRAM - - - - - - - - - - - - - - - - - - - - - -4-7
FIG. 4-3 SETUP I/O FOR REMOTE MODE OF OPERATION - - -4-18
FIG. 4-4 SETPARAMS LADDER LOGIC EXAMPLE/LOCAL
MODE - - - - - - - - - - - - - - - - - - - - - - - -4-23
FIG. 4-5 SETPARAMS LADDER LOGIC EXAMPLE/REMOTE
MODE - - - - - - - - - - - - - - - - - - - - - - - -4-27
CHAPTER 5 - CALIBRATION - - - - - - - - - - - - - - - - - - -5-1
FIG. 5-1 PROPERLY INSTALLED LOAD CELL W/NO BINDING -5-2
FIG. 5-2 MILLIVOLTS/WEIGHT SCALE - - - - - - - - - - - - -5-3
FIG. 5-3 “THE BUTTON” C2 CALIBRATION - - - - - - - - - - -5-5
FIG. 5-4 C2 LED - - - - - - - - - - - - - - - - - - - - - - - - -5-6
FIG. 5-5 C2 LADDER LOGIC EXAMPLE/LOCAL MODE
OF OPERATION - - - - - - - - - - - - - - - - - - -5-10
FIG. 5-6 C2 LADDER LOGIC EXAMPLE/REMOTE MODE
OF OPERATION - - - - - - - - - - - - - - - - - - -5-12
CHAPTER 6 - OPERATING PROCEDURES - - - - - - - - - - - -6-1
FIG. 6-1 READWEIGHT LADDER LOGIC EXAMPLE/LOCAL
MODE OF OPERATION - - - - - - - - - - - - - -6-6

HI 1746-WS WEIGH SCALE MODULE
II

Chapter 1 - Overview
1-1
CHAPTER 1 - OVERVIEW
A BRIEF
DESCRIPTION OF
CHAPTER 1
This manual provides the user and service personnel
with a description of the specifications, installation,
setup, configuration, operation, communication,
maintenance, and troubleshooting procedures for the
Hardy Process Solutions HI 1746-WS Weigh Scale
Module, designed for use in Allen-Bradley’s SLC 5/
02, 5/03, 5/04, 5/05 programmable controllers. The
HI 1746-WS is equipped with WAVERSAVER®, C2®
Calibration, The Button, and INTEGRATED TECHNI-
CIAN (IT) diagnostics. The module is configurable via
Windows®95/98/NT HI WS 100 Configuration Soft-
ware or RS Logix 500©Industrial Programming Soft-
ware. To get the maximum service life from this
product, users should operate this module in accor-
dance with recommended practices either implied or
expressed in this manual. Before using the Weigh
Scale Module, all users and maintenance personnel
should read and understand all cautions, warnings,
and safety procedures, referenced or explicitly stated
in this manual, to ensure the safe operation of the
module. Hardy Process Solutions appreciates your
business. Should you not understand any information
in this manual or experience any problems with the
product, please contact our Customer Support Depart-
ment at:
Phone: [phone]
FAX: [phone]
e-mail: [e-mail]
Web Address: http://www.hardysolutions.com
NOTE: WAVERSAVER®, C2®, INTEGRATED TECHNICIAN®are
registered trademarks of Hardy Process Solutions Inc.
Windows®is a registered trademark of the Microsoft
Corporation. RS Logix 500©is a Copyright of Rock-
well Software Inc.
NOTE: Hardy bases all procedures with the assumption that
the user has an adequate understanding of all Allen-
Bradley SLC 500 products. In addition the user

HI 1746-WS WEIGH SCALE MODULE
1-2
should understand process control and be able to
interpret ladder logic instructions necessary to gener-
ate the electronic signals that control your applica-
tion(s).
About Hardy Manuals Every Hardy Installation and Operation manual is
organized into easily referenced chapters, that are
almost always the same:
•Chapter 1 - Provides an introduction to the
instrument and an Overview of the equipment
and its capabilities.
•Chapter 2 - Provides a complete list of Specifi-
cations.
•Chapter 3 - Contains information needed to
install the HI 1746-WS (both standard and
optional equipment) and the HI 215IT series
Junction Box.
•Chapter 4 - Provides complete hardware Con-
figuration instructions for setting dip switches
and jumpers.
•Chapter 5 - Pertains to the firmware/software
Setup and preparation procedures to calibrate
and operate the instrument.
•Chapter 6 - Provides all Calibration instruc-
tions.
•Chapter 7 - Pertains to the Operating Proce-
dures of the HI 1746-WS.
•Chapter 8 - Pertains to the Troubleshooting
procedures for repair of the instrument.
Hardy Process Solutions hopes that this manual meets
your needs for information and operation. All correc-
tions or suggestions for improvements of this manual
are welcome and can be sent to the Technical Publica-
tions Department or Customer Support Department at
Hardy Process Solutions Inc.
Description The HI 1746-WS Weigh Scale Module is a self con-
tained microprocessor based I/O module with control
inputs and outputs, that is designed to be easily
plugged into the back plane of an Allen-Bradley SLC
5/02, 5/03, 5/04 or 5/05 programmable controller and/
or Remote Rack. The HI 1746-WS Weigh Scale Mod-
ule can be configured to operate as either a local or

Chapter 1 - Overview
1-3
remote module. The HI 1746-WS module can be used
for a wide variety of process weighing applications
such as batching, blending, filling/dispensing, check
weighing, force measurement, level by weight and
weight rate monitoring. The module can control two
(2) relays via two (2) TTL level outputs and transmits
data via the back plane to the SLC. The 20 bit analog
to digital converter in the weigh module controller
updates twenty (20) times per second and is capable
of 985,000 counts of display resolution. This gives the
instrument the ability to tolerate large “dead” loads,
over sizing of load cells/sensors and still have suffi-
cient resolution to provideaccurate weight measure-
ment and control. The HI 1746-WS module is set up
by using the SLC 500 AI Series, RS Logix500©
Industrial Programming Software for Windows®95/
98/NT or the optional Hardy Windows®95/98/NT HI
WS100 Configuration Software. The software config-
uration applications must be installed in a PC with
either Ethernet, DH+, DH-485, or RS-232-C that can
initiate communications with the SLC 5/02, 5/03, 5/
04 or 5/05. To calibrate the module you can simply
push “The Button” to effect a C2 calibration. C2,
Hard (Traditional calibration with weights), and Soft
calibration can be implemented from the SLC 500 AI
Series DOS software, RS Logix500©Industrial Pro-
gramming Software for Windows®95/98/NT or from
the optional Hardy WS 100 Configuration Software
for Windows. The HI 1746-WS is IT (Integrated
Technician) enabled which means the module has a
built in IT excitation monitor to detect some load cell
problems and with the addition of the optional HI
215IT Junction Box and the HI WS100 software, the
operator can use the other IT functions for fault isola-
tion troubleshooting of the weighing system.
WAVERSAVER®Typically, mechanical noise (from other machinery in
a plant environment) is present in forces larger than
the weight forces trying to be detected by the module.
The HI 1746-WS is fitted with WAVERSAVER®
technology which eliminates the effects of vibratory
forces present in all industrial weight control and

HI 1746-WS WEIGH SCALE MODULE
1-4
measurement applications. By eliminating the factor
of vibratory forces the module is capable of identify-
ing the actual weight data. WAVERSAVER®can be
configured from the Configuration Software to ignore
noise with frequencies as low as 0.25 Hz. One of five
higher additional cut off frequencies may be selected
to provide a faster instrument response time. The
default factory configuration is 1.00 Hz vibration fre-
quency immunity.
C2®Calibration C2 Second Generation Calibration enables a scale
system to be calibrated electronically without using
certified test weights which equals the systems load
capacity. A C2 weighing system consists of up to
eight (8) C2 load sensors, a junction box, interconnect
cable and an instrument with C2 capabilities such as
the HI 1746-WS Weight Scale Module. All Hardy C2
certified load sensors contain digital information
detailing its unique performance characteristics. The
HI 1746-WS reads the performance characteristics of
each individual load sensor and detects the quantity of
load sensors in the system. C2 Calibration can be per-
formed by pressing “The Button” located in the front
of the module, or via Hardy’s Configuration Software
or Allen-Bradley’s RS Logix 500 software.
IT®INTEGRATED TECHNICIAN™is a system diagnostics
utility which continuously monitors the weighing sys-
tem (with up to 4 load sensors) for possible malfunc-
tions. For full functionality the HI 215IT junction box
and Hardy’s Configuration Software for Windows
should be used. Full IT functionality allows the opera-
tor to rapidly troubleshoot a weighing system from
the Configuration Software, INTEGRATED TECHNI-
CIAN Display.
Excitation Monitor Continuously monitors a system’s excitation current
to check for open or shorted load sensors or damaged
or broken excitation wire(s), including the wires
between the module and the IT Junction box. If the
measured current deviates more than a +/- 10% toler-
ance, an “Excitation Error” bit (Module Status Word
bit 9) is set to 1.

Chapter 1 - Overview
1-5
Digital Volt Meter
(DVM) - Optional Requires the HI 215IT Junction Box and Hardy Con- figuration Software to monitor both mV and mV/V
readings per individual load sensor. Once a problem is
detected by the operator the DVM readings help the
operator to isolate the faulty component. Further, the
DVM readings can be used to level a balanced system
and to make corner adjustments to platform scales.
Accuracy is +/- 2% or better of full scale.
NOTE: If you do not have the HI 215IT Junction Box con-
nected to the module, the mV/V reading as displayed
in the Configuration Software, Test display is the total
for all the load cells on the system.
Return to Zero
Test - Optional Requires the HI 215IT Junction Box to monitor indi-
vidual load sensors. The Hardy configuration Soft-
ware is required when using this option. This test
compares the original voltage reading (saved at cali-
bration) against the current voltage reading of an
empty vessel. The test displays a “Passed Return to
Zero Test” or a “Failed Return to Zero Test” statement
when running the System Test from the Configuration
Software, Test Display, depending on the outcome of
the test. The test checks for damaged load sensors due
to electrical zero shift or abnormal mechanical forces
that cause binding on one or all of the load sensors in
the system.
Weighing System
Tests - Optional Requires the HI 215IT Junction Box. This test is used
to diagnose drifting or unstable weight reading prob-
lems. The Weighing System Test does the following:
1. Disconnects the controller and engages an inter-
nal reference signal to see if the problem is within
the instrument.
1. Disconnects the load sensors and engages an
internal (in the junction box) reference signal to
see if the cable between the instrument and the
Junction Box is causing the problem.
2. Reads the weight of each load sensor to see if the
load sensor might be causing the problem.
The ability to read the weight seen by each individual
load sensor allows use of this test to make cornering,

HI 1746-WS WEIGH SCALE MODULE
1-6
leveling and load sharing adjustments to the weighing
system. The Hardy Configuration Software is highly
recommended for use with this option.
Auto Zero Auto Zero Tracking will indicate zero weight, as long
as any “live weight” on the scale is below the set Auto
Zero Tolerance and the scale is not motion. This capa-
bility allows the module to ignore material build-up in
the weighing system within a pre-set auto zero toler-
ance.
Note The amount of weight zeroed off is cumulative. The
zero command will fail if the current gross weight plus
any previously zeroed amount exceeds the zero
tolerance.
Set Point TTL
Outputs The HI 1746-WS is equipped with two (2) standard Digital TTL (Transistor - Transistor Logic) Level
Outputs which can be connectedto external solid state
relays. Both outputs have individual set point, preact
and deadband parameters. Both outputs are rated at 10
milliamps per line. Each can be programmed to
respond to the standard Net, Gross, Rate of Change
(ROC), Excitation Monitor, Force On or Force Off
mode of operation.

Chapter 2 - Specifications
2-1
CHAPTER 2 - SPECIFICATIONS
A Brief Description of
Chapter 2 Chapter 2 lists the specifications for the HI 1746-WS
Weigh Scale Module. Specifications are listed for the
standard instrument and for optional equipment. The
specifications listed are designed to assist in the
installation, operation and troubleshooting of the
instrument. All service personnel should be familiar
with this section before attempting an installation or
repair of this instrument.
Specifications for a
Standard HI 1746-WS
Weigh Scale Module
Modes of
Operation Local and Remote
Conversion Rate 20 updates per second
Averages 1-255 User Selectable in single increments
Resolution Displayed: 1:985,000 (@ 3 mV/V)
1:656,000 (@ 2 mV/V)
Internal: 1:1,048,576
Input Up to eight (8) 350 ohm Full Wheatstone Bridge,
Strain Gauge Load Sensors/Cells (5 volt excitation)
on one vessel.
Non-Linearity 0.0015% of Full Scale
Maximum Zero
Tolerance 32766
WAVERSAVER®User Selectable
• 7.50 Hz
• 3.50 Hz
• 1.00 Hz (Default)
• 0.50 Hz
• 0.25 Hz
Excitation Monitor Current less than +/- 10% expected

HI 1746-WS WEIGH SCALE MODULE
2-2
Common-Mode
Rejection 110dB at or below 60 Hz
Common-Mode
Voltage Range 2.5VDC maximum (with respect to earth ground)
Backplane Input
Voltage 5 VDC maximum (with respect to earth ground)
Backplane Current
Load 0.250 Amps at 5 VDC
Power +5 VDC +/- 5%
C2 Calibration
Input Isolation from digital section 1000 VDC minimum.
Cable lengths 1000 feet maximum of C2 authorized cable
250 feet maximum of C2 authorized cable (Maximum
of 4 load sensors) with IT Junction box.
Load Cell
Excitation 5 VDC +/- 1.15 W maximum.
Isolation from digital section 1000 VDC minimum
C2 Calibration
Output Isolation from digital section 1000 VDC minimum
Set Point (1 & 2)
Out Discrete outputs (TTL) step function of 0 or +5 VDC to drive an SSR
Environmental
Requirements
Temperature
Coefficient Less than 0.005% of full scale per degree C for Cal- LO and Cal-HI reference points
Operating
Temperature
Range
0oC to 60oC (32oF to 140oF)
Storage
Temperature
Range
-20oC to 85oC (-4oF to 185oF)
Humidity Range 0-90% (non-condensing)

Chapter 2 - Specifications
2-3
Approvals UL Certification
cUL Certification
CE Approval
Digital Voltmeter Accuracy +/- 2% of full scale
Resolution
• mV/V 4 digits to the right of the decimal
• mV 1 digit to the right of the decimal
Optional Equipment HI
215IT Junction Box
IT Junction Box
HI 215IT-SS or PS
Series
Case
Dimensions 6.25”H x 6.25”W x 4.50D (158.75mmH x 158.75mmW x 114.3mmD)
Weight 5 pounds (2.27 Kilograms)
Enclosure
Ratings -SS Stainless Steel NEMA 4 & 4X
-PS Painted Carbon Steel NEMA 4
IT Junction Box
HI 215IT-FG Series
Case
Dimensions 6.50”H x 8.0”W x 4.46”D (165.1mmH x 203.2mmW x 113.28mmD)
Weight 5 pounds (2.27 Kilograms)
Enclosure
Rating -FG Fiberglass NEMA 4 & $X
Configuration
Software for
Windows
Hardy’s Configuration Software for Windows allows
the user to configure, monitor, and troubleshoot an HI
1746-WS module and load points from any PC with
an installed Windows®95/98 or NT operating system.

HI 1746-WS WEIGH SCALE MODULE
2-4
Default Parameters
Table 2-1:
Parameter Default Setting
Tare Weight 0.0 lbs
WAVERSAVER®1 Hz 2
Weight Units lbs 0
Span Weight 10,000.0 lbs
Averages 10
Auto Zero Tracking Enabled False 0
Tare Enabled True 1
Zero Enabled True 1
Calibration Type No Calibration -1
Setpoint Mode 1&2 Force Low,
Gross 0x12
Setpoint Value 1&2 10000.0 lbs
Setpoint Deadband 1&2 0.1 lbs
Setpoint Preact 1&2 0.0 lbs
Auto-zero Tolerance 10.0 lbs
Motion Tolerance 5.0 lbs
Zero Tolerance 10
Rate of Change Time Base 10
Cal Year 0
Cal Month 0
Cal Day 0
Cal ID 0