Helm HM1520 User manual

Strain Gage Input Module
Model HM1520
Instruction Manual
Revised : 9/21/2008

Solid state equipment has operational characteristics differing from those
of electromechanical equipment. “Safety Guidelines for the Application,
Installation and Maintenance of Solid State Controls” (Allen-Bradley
Publication SGI-1.1) describes some important differences between solid
state equipment and hard-wired electromechanical devices. Because of
this difference, and also because of the wide variety of uses for solid
state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment
is acceptable.
Important User
Information
In no event will the Allen-Bradley Company or Helm Instrument
Company be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for
illustrative purposes. Because of the many variables and requirements
associated with any particular installation, the Allen-Bradley Company or
Helm Instrument Company cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Allen-Bradley Company or Helm
Instrument Company with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without
written permission of the Allen-Bradley Company and Helm Instrument
Company is prohibited.
Throughout this manual we use note to make you aware of safety
considerations.
ATTENTION: Identifies information about practices or
circumstances that can lead to property damage.
Identifies information that is especially important for
successful application and understanding of the product.
Attentions help you:
•identify a hazard
•avoid the hazard
•recognize the consequences
ATTENTION: Please check power supply ratings
before proceeding! Each tonnage module
consumes (+24, 65 mA +5, 150mA). Be sure to not
overload the power supply.
PLC, PLC2, PLC3, and PLC5 are registered trademarks of the Allen-Bradley Company, Inc.
SLC, SLC500, PanelView, RediPANEL, Dataliner are trademarks of Allen-Bradley Company, Inc.
IBM is a registered trademark of International Business Machines, Incorporated.
StrainGage is a registered trademark of the Helm Instrument Company, Inc.

Table of Contents
StrainGage Load Module
User Manual
Table of Contents
Strain Gage Module
User Manual
Preface...................................................................................................P-1
Who Should Use this Manual...........................................................P-1
Purpose of this Manual....................................................................P-1
Contents of this Manual..............................................................P-2
Related Documentation ..............................................................P-3
Terms and Abbreviations.................................................................P-4
Common Techniques Used in this Manual......................................P-6
Product Support.........................................................................P-6
Your Questions or Comments on this Manual...........................P-6
Chapter 1.............................................................................................. 1-1
Trend Components..........................................................................1-1
Strain Gain Transducer Operation................................................... 1-1
Features...........................................................................................1-1
Hardware Overview .........................................................................1-2
Hardware Features..........................................................................1-3
Chapter 2.............................................................................................. 2-1
Getting Started.................................................................................2-1
Required Tools and Equipment .......................................................2-1
System Operation............................................................................ 2-2
Sensor Wiring ..................................................................................2-2
Getting
Started
Overview
Chapter 3.............................................................................................. 3-1
Channel
Configuration,
Data and
Status
Channel Configuration, Data and Status .........................................3-1
Module Addressing.......................................................................... 3-1
Module Configuration.................................................................... 3-1
Data Table Memory Map .................................................................3-1
Output Image..................................................................................3-1
Input Image..................................................................................... 3-3
Integer File...................................................................................... 3-5

Table of Contents
StrainGage Load Module
User Manual
Initial
Setup
Procedures
Chapter 4.............................................................................................. 4-1
Initial Setup Procedures...................................................................4-1
Step 1. Set the Run mode bit to Bypass.......................................4-1
Step 2. Balance Sensor Input....................................................... 4-1
Step 3. Set Calibration Numbers ..................................................4-2
Step 4. Set Machine Capacity Cycle.............................................4-2
•Setting Machine Capacity Scale using (1) two
Channel force module ..................................................4-2
•Setting Machine Capacity Scale for multiple
channel systems...........................................................4-3
Step 5. Set Capacity Alarms..........................................................4-3
Step 6. Set Minimum Low Alarm....................................................4-4
Step 7. Set Sample Count .............................................................4-5
Step 8. Set Trend Alarms...............................................................4-6
•Set High and Low Trend Alarm – Channel 1 ................ 4-6
•Set High and Low Trend Alarm – Channel 2 ................ 4-7
Additional Application Notes............................................................ 4-8
Mode Status..................................................................................4-8
Bypass Mode................................................................................ 4-8
Peak Mode....................................................................................4-8
Monitor Parts Mode....................................................................... 4-8
High Capacity and Low Minimum Alarm bits – Channel 1 & 2......4-10
Trend High and Low Alarm bits................................................... 4-11
Machine \ Top Stop bit................................................................ 4-12
Low Alarm Inhibit ........................................................................4-13
Peak Look Window..................................................................... 4-14
System
Trouble-
Shooting
Guide
Chapter 5............................................................................................. 5-1
HT-400 Sensor Ohm Reading.........................................................5-1
Block Diagrams.................................................................................5-2

Table of Contents
StrainGage Load Module
User Manual
Appendix
Specifications…………………………………………………………Appendix A
Ladder Program………………………………………………………Appendix B
Setting Up HM1520 Module for CompactLogix ..…………………Appendix C

Preface
Preface Read this preface to familiarize yourself with the rest of this manual. This
preface covers the following topics:
•who should use this manual
•the purpose of this manual
•terms and abbreviations
•conventions used in this manual
•Allen-Bradley support
Who Should
Use this
Manual
Use this manual if you are responsible for the design, installation, programming,
or maintenance of an automation control system that used Allen-Bradley small
logic controllers.
You should have a basic understanding of SLC 500 products. You should
understand electronic process control and be able to interpret the ladder logic
instructions required to generate the electronic signals that control your
application. If you do not, contact your local Allen-Bradley representative for the
proper training before using this product.
Purpose of
This Manual This manual is a learning and reference guide for the Helm StrainGage Module.
It contains the information you need to install, wire, and use the module.
P-1

Preface
Contents of this
Manual
Chapter Title Content
Preface Describes the purpose, background,
and scope of this manual. Also
specifies the audience for whom this
manual is intended and defines key
terms and abbreviations used
throughout this book.
1 Overview Provides a hardware and system
overview. Explains and illustrates the
components of the system.
2 Installation and Wiring Provides installation information and
wiring guidelines.
3 Channel Configuration, Data
and
Status
Examines the channel configuration
and the channel status word, and
explains how the module uses
configuration data and generates
status during operation.
4 Ladder Programming Examples Gives an example of the ladder logic
required to define the channel for
operation. Also includes
representative examples for unique
requirements such as sample count,
trend calculation, etc.
5 Troubleshooting Explains how to interpret and correct
problems that occur while using the
load module.
A Specifications Provides physical, electrical,
Environmental, and functional
Specifications for the module.
B Ladder Program
C
PanelView Screens
Shows PanelView Screens and
explain their various functions.
P- 2

Preface
Related
Documentation
The following documents contain information that may be helpful to you as you
use Allen-Bradley SLC products. To obtain a copy of any of the Allen-Bradley
documents listed, contact your local Allen-Bradley office or distributor.
For Read this Document Document
Number
An overview for the MicroLogixTM
Programmable Controllers MicroLogix 1500 Programmable Controllers 1764-UM001A-US-P
A description on how to install and use your
MicroLogix Programmable Controller MicroLogix 1500 Programmable Controller Base Units Installation Instructions and
Wiring Diagrams
1764-IN001A-ML-P
A description on how to install the processor
into the MicroLogix 1500 Base unit. MicroLogix 1500 Processor Installation Instructions 1764-IN002A-ML-P
Selecting Discrete Input/Output Modules Compact Discrete Input/Output Modules
Technical Data 1769-2.1
View power usage of expansion modules to
determine power supply requirements Expansion Modules System Qualifier RA Website Download
End Cap Installation Compact I/O End Caps/Terminators
Installation Instructions 1769-5.16
A complete listing of current Automation
Group documentation, including ordering
instructions. Also indicates whether the
documents are available on CD-ROM or in
multi-languages
Automation Group Publication Index SD499
A glossary of industrial automation terms
and abbreviations Allen-Bradley Industrial Automation Glossary ICCG-7.1
An article on wire sizes and types for
grounding electrical equipment National Electrical Code Published by the National Fire
Protection
Association of
Boston, MA.
P-3

Preface
Terms and
Abbrevia-
tions The following terms and abbreviations are used throughout this manual. For definitions of terms
not listed here refer to Allen-Bradley’s Industrial Automation Glossary, Publication ICCG-7.1.
Calibration - Procedure, performed by trained personnel, where machine or press is
dynamically loaded to impact on load cells. A process of linearity measuring to determine the
loading capacity of the machine.
Calibration Number - Amplification values established during machine calibration or pre-
assigned on force load cells.
Channel - Refers to one of two, strain gage inputs available on the modules terminal block.
Chassis - A hardware assembly that houses devices such as I/O modules, adapter modules,
processor modules, and power supplies.
Configuration Word - Contains the channel configuration information needed by the module to
configure and operate each channel. Information is written to the configuration word through
the logic supplied in your ladder program.
Data Word - A 16-bit integer that represent the value of the analog input channel. The channel
data word is valid only when the channel is enabled.
Gain - Amplification of an input signal.
Load/Force - Measurement of impact during a machine cycle. Sensors provide the input for
this measurement.
Look Window - Resolver or cam activated window, which allows specific degrees in a machine
cycle to be processed.
Low Alarm Inhibit - Number of consecutive machine cycles where low alarm is inhibited. Used
in a process where machine cycles several times before running speed is established.
LSB - (Least Significant Bit) Refers to a data increment defined as the full scale range divided
by the resolution. The bit that represents the smallest value within a string of bits.
Monitor Parts Mode - Status condition used during production run. Sample and compare logic
is enabled. On resolver based systems, tracking alarm limits can be enabled.
Multiplexer - A switching system that allows several input signals to share a common A/D
converter.
Remote Configuration - A control system where the chassis can be located several thousand
feet from the processor chassis.
P-4

Preface
Terms and
Abbrevia-
tions
(continued)
Resolution - The smallest detectable change in a measurement, typically expressed in
engineering units (e.g. 0.15C) or as a number of bits. For example a 12-bit system has 4,096
possible output states. It can therefore measure 1 part in 4096.
Resolver - Sometimes called encoder. Device attached on a machine to determine stroke
position. Sine/cosine based resolver required for Helm systems.
Reverse Load - Measurement of negative load/force being exerted on machine following the
break-through of material. Also referred to as snap through.
Sample - Load/force values established from a series of machine cycles. Also defined as
benchmark.
Sample Count - User input value used to specify how many machine cycles to base the sample
on.
Sampling time - The time required by the A/D converter to sample an input channel.
Scale - Value used to describe the press/machine overall tonnage. Set for maximum value of
one channel. For example, settings for a 150 ton press = 75.
Setup Mode - Status condition of monitor typically enables during die setup. Machine capacity
alarms are enabled. On resolver based systems, press curve alarm can be enabled. This
mode is also used during machine and resolver calibrations.
Status Word - Contains status information about the channel’s current configuration and
operational state. You can use this information in your ladder program to determine whether
the channel data word is valid.
Target Load - A reference load established by the user. Used primarily during setup to improve
setup time.
Tolerance /Trend Alarm - User defined upper and lower control limits established during the
sample and compare process. These limits are established on the peak load and will activate
the machine stop relay when exceeded.
Tracking Alarm - Requires resolver input. The sample and compare process is applied to the
entire forming force based on user selected upper and lower control limits.
Trend Deviation - Percent of change, high and low, from sample value to current value.
Update Time - The time required for the module to sample and convert the input signals of all
enables input channels and make the resulting data values available to the SLC processor.
P-5

Preface
Common
Techniques
Used in this
Manual
The following conventions are used throughout this manual:
•Bulleted lists such as this one provide information, not procedural steps.
•Numbered lists provide sequential steps or hierarchical information.
Product
Support Contact your Helm representative or call Helm direct at 419-893-4356:
•sales and order support
•product technical training
•warranty support
•support service agreements
Your Questions or Comments on this Manual
If you have any suggestions for how this manual could be made more useful to you, please send
us your ideas.
P-6

Chapter 1
Overview You have just purchased the most advanced load monitoring solution available.
HELM INSTRUMENT COMPANY, INC. manufactures a complete line of load
monitoring control solutions for use on metal stamping, forging, compaction and
assembly presses; cold forming, cold heating, injection molding and die cast
machines.
Standard or custom transducers and load cells are available for in-die monitoring
of transfer or progressive tooling.
At HELM, quality is inherent not only in the design of our products but in the
attitudes of our employees as well. We’re working together to give you the best.
After all, that’s what our business is all about - providing innovative
instrumentation to help make your manufacturing process more productive and
your operation more effective.
The Helm StrainGage combines machine and tooling monitoring with
programmable limit switch function. User programmable high and low limits
protect the machine and tooling to ensure part quality.
Critical setup information can be stored and uploaded as part of a die recipe
program. An optional resolver input module is used to compare machine/press
tonnage to crank angle for real time signature analysis.
Components The Helm StrainGage module is attached to the controller or to an adjacent I/O
module on the din rail. The system is comprised of two parts; the input module
and two Helm Strain gage based sensors.
Strain Gain
Transducer
Operation
The primary part of the load monitoring system centers around the measurement.
The basic function of the Helm Strain Gain sensor is to detect the amount of
deflection imposed on the press or die as parts are being formed. All Strain Gain
sensors are matched to within 1% and therefore can be replaced without
recalibration of the machine.
The Helm Strain Gain sensors can be mounted to strategic high stress areas of
the machine frame or strategically located in tooling or applied to stop blocks.
Signals from these sensors are routed to the StrainGage module for processing.
The Helm Strain Gage is capable of measuring either a tension or compression
signal.
•Sample and Compare Logic - processor memorizes the sample or benchmark load
and compares each machine cycle against this sample.
StrainGage
Module
Features •User programmable Sample Count - selectable number of machine cycles on
which to base the sample.
•High and Low Capacity Alarm Sets - a discrete load limit for a maximum allowable
load and a minimum allowable load.
•High and Low Trend Alarm Sets - set as a percentage of load change on an
established sample.
•Low Alarm Inhibit - User programmable option to disable low alarm during process
start-up.
Page 1-1

The StrainGage module can be attached to the controller or to an adjacent I/O
module before or after din rail mounting. It is a Class 1 module (uses eight input
words and eight output words). It interfaces to strain gage based transducers
(350ohm or 700ohm).
The module can accept input from two sensors. The module has no output
channels. Module configuration requires manual and user programmable setup.
The StrainGage module receives and stores digitally converted analog data into
its image table for retrieval by processor. The module supports connections from
any combination of up to two strain gage sensors.
Any combination of Helm Strain Gage sensors can be used. Contact Helm for
additional information on the type and application of different sensor options.
Chapter 1
Hardware
Overview
The Helm module requires (1) input from a cam switch or a proximity
sensor for establishing the peak look window
Page 1-2

Chapter 1
1. Channel 1 Gain Pot
3. Channel 1 Balance Po
t
2.
C
h
a
nn
e
l 1
Ca
li
b
r
ate
S
wi
tc
h
4. Recorder Out
p
ut Jack
6. Channel 2 Calibrate Switch
5. Channel 2 Gain Pot
7. Channel 2 Balance Po
t
8. Gain Select Jum
p
er
Hardware
Features
Alarm Status Display Fault Status - High and Low
Door Label Channel 1-Channel 2 calibrate switch
Wiring diagram for (2) sensor inputs
2. and 6.
Channel Calibrate Switch Three-position switch used for setup. AZ (Auto Zero ON) position is the normal run
position.
CAL position (calibrate) is used with Gain pot
to set calibration numbers.
OFF position is used with Balance pot to zero
sensor.
OFF position turns Auto Zero off.
1. and 5.
Channel Gain Potentiometer Used to set calibration numbers. Set three- position switch to CAL setting.
4.
Recorder Output Jacks for analog or track output of sensor data.
One jack for each channel. Can be used with
chart recorders or Helm Ramcorder™ data
recorder.
3. and 7.
Channel Balance Potentiometer Used to zero balance the sensor during setup. Set three-position switch to OFF position.
Gain Selector
High and Low Cam
Jumper Setting
Located at Bottom
Left Corner of Module
Black Jumper
Used to amplify the sensor input.
This switch is factory set at high
range. Under normal operating
conditions, the setting should not
be changed. Personnel
responsible for the calibration of
the Helm StrainGage module
make the determination of the
range setting during the
calibration process.
Page 1-3

This chapter can help you to get started using the Helm StrainGage
module. The procedures included here assume that you have a basic
understanding of PLC products. You should understand electronic
process control and be able to interpret the ladder logic instructions
required to generate the electronic signals that control your application.
Chapter 2
Getting
Started
Because it is a start-up guide, this chapter does not contain detailed
explanations about the procedures listed. It does, however, reference
other chapters in this book where you can get more information about
applying the procedures described in each step. It also references other
SLC documentation that may be helpful if you are unfamiliar with
programming techniques or system installation requirements.
If you have any questions or are unfamiliar with the terms used or
concepts presented in the procedural steps, always read the referenced
chapters and other recommended documentation before trying to apply
the information.
This chapter will:
•tell you what equipment you need
•explain how to install and wire the module
•show you how to set channels for the sensor input
Required Tools and Equipment
Have the following tools and equipment ready:
•small blade screwdriver
•potentiometer trimmer (tweeker)
•appropriate strain gage cable
•programming equipment (All programming examples shown in this manual
demonstrate the use of Allen-Bradley’s RS Logix 500.
Page 2-1

Chapter 2
System
Operation The Strain Gage module communicates to the processor through the parallel
backplane interface and receives +5Vdc and +24Vdc power from the power
supply through the backplane. No external power supply is required. The
MicroLogix and CompactLogix platforms can support up to 8 I/O modules. You
may install up to 3 StrainGage modules using the base power supply. An
additional power supply can be added to support more than 3 modules. Refer to
publication 17864-UM100A-US-P for information on expansion power supply
systems.
Each individual channel on the module can receive input signals from strain gage
based sensors. The module converts the analog values directly into digital
values.
Sensor
Wiring The sensors are wired to the modules using the rightmost bank of inputs.
The pin-out is shown below.
To ensure proper operation
and high immunity to
electrical noise, always use
Helm strain gage cable.
To limit noise, keep strain gage cable as
far away as possible from power and load
lines.
The module can support up
to two sensor inputs DO
NOT attempt to parallel
additional gages as you will
cause damage to the
module and void product
warranty.
(CH 1) + SIGNAL (WHITE)
(CH 1) NOISE DRAIN (SHIELD)
(CH 1) – SIGNAL (RED)
BOTH + GAGE (BLACK)
BOTH – GAGE (GREEN)
(CH 2) + SIGNAL (WHITE)
(CH 2) NOISE DRAIN (SHIELD)
(CH2) – SIGNAL (RED)
Page 2-2

Chapter 3
Channel
Configuration
Data and
Status
This chapter explains how the StrainGage module and the processor communicate.
For CompactLogix configuration, please refer to Appendix C – Setting Up HM1520 for
CompactLogix
The 8 word output image (output from the CPU to the module) contains
Information that you configure to define the way a specific channel will work.
Example – If you want to configure channel 2 on the module located in slot 4
in the SLC chassis, your address would be O:4.2.
(o = file type : =element delimiter 4=slot .=word delimiter 2=word)
Bit Look Window Signal CH 1&2 O:e.0/0
Bit Bypass Mode CH 1&2 O:e.0/1
Bit Peak Mode CH 1&2 O:e.0/2
Bit Monitor Parts Mode Bit O:e.0/3
Bit Alarm Reset CH 1&2 O:e.0/4
Bit Reverse Load CH 1&2 O:e.0/5
Bit Low Alarm Inhibit CH 1&2 O:e.0/6
Bit Reserved O:e.0/7
Bit D0 Bit of Sample Count O:e.0/8
Bit D1 Bit of Sample Count O:e.0/9
Bit D2 Bit of Sample Count O:e.0/10
Bit D3 Bit of Sample Count O:e.0/11
Bit D4 Bit of Sample Count O:e.0/12
Bit Reserved O:e.0/13
Bit Reserved O:e.0/14
Bit Reserved O:e.0/15
Integer Scale Value O:e.1
Integer Capacity Low Alarm Setting Channel 1 O:e.2
Integer Capacity High Alarm Setting Channel 1 O:e.3
Integer Capacity Low Alarm Setting Channel 2 O:e.4
Integer Capacity High Alarm Setting Channel 2 O:e.5
Integer Trend High/Low Alarm Setting Channel 1 O:e.6
Integer Trend High/Low Alarm Setting Channel 2 O:e.7
Page 3-1

Chapter 3
Output
Image
(cont.)
Peak Look Window Bit 0 (O:2/0)
When set on (1) the look window is active. When set off (0), the look window is inactive. The
module will process data while look window is active.
Bypass Mode Bit (O:2/)
When set on (1) module is in calibration mode. Channels are disabled. No alarms are active.
Only occurs when in Tonnage Calibration Screen.
Peak Mode Bit (O:2/2)
When set on (1) module is in setup (peak only monitoring) mode. Capacity alarms are active.
Alarm Reset Bit (O:2/4)
When set on (1) alarm reset occurs. Alarm condition must be cleared.
Reverse Load Bit (O:2/5)
When set on (1) reverse load values are stored (I:e.1 - I:e.2).
Low Alarm Inhibit Bit (O:2/6)
When set on (1) low alarming is disabled for duration. Duration set in ladder counter file.
Machine Capacity Scale Setting (Integer Word O:2.1)
Represents the total load rating of each load cell. A value must be present to enable module
functionality.
Minimum Load Alarm Setting Channel 1 (Integer Word O:e.2)
Integer value of low capacity alarm setting. Range = 0 to 9999. A value of 0 disables alarm.
Capacity Load Alarm Setting Channel 1 (Integer Word O:e.3)
Integer value of high capacity alarm setting. Range = 0 to 9999. A value of 0 disables alarm.
Minimum Load Alarm Setting Channel 2 (Integer Word O:e.4)
Integer value of low capacity alarm setting. Range = 0 to 9999. A value of 0 disables alarm.
Capacity Alarm - High Setting Channel 2 (Integer Word O:e.5)
Integer value of low capacity alarm setting. Range = 0 to 9999
Trend Alarm - Channel 1 High and Low (Integer Word O:e.6)
Integer values of high and low trend alarm settings. Values are set in percent and represent
The maximum and minimum percent of change off the sample value. Range = 0 to 99%.
High Trend percent is set at high byte of the word value. Low Trend percent is set at low byte
of the world value. For example, to set 25% high alarm and a 20% low alarm, the actual word
value is 25 * 256 + 20 = 6420. A value of 0 disables alarm.
Trend Alarm - Channel 2 High and Low (Integer Word O:e.7)
Integer values of high and low trend alarm settings. Values are set in percent and represent
The maximum and minimum percent of change off the sample value. Range = 0 to 99%.
High Trend percent is set at high byte of the word value. Low Trend percent is set at low byte
of the world value. For example, to set 25% high alarm and a 20% low alarm, the actual word
value is 25 * 256 + 20 = 6420. A value of 0 disables alarm.
Page 3-2

Chapter 3
The 8-word module input image (input from the module to the CPU) represents data
words and status words. Input words (data words) hold the input data that represents
the values of the sensor inputs.
Data Table
Input Image
Input words (status bits) contain the various status conditions and reflect the
configuration settings you have entered into the output configuration words.
To obtain the status of Channel 2 Capacity Alarm Bit of the module located in slot 2 of
the rack, use address I:2
(I =file type : =element delimiter 2 =slot . =word delimiter 0 =word / 2 =bit)
Bit Channel 1 High Capacity Alarm Bit I:e.0/0
Bit Channel 1 Low Capacity Alarm Bit I:e.0/1
Bit Channel 2 High Capacity Alarm Bit I:e.0/2
Bit Channel 2 Low Capacity Alarm Bit I:e.0/3
Bit Channel 1 Trend High Alarm Bit I:e.0/4
Bit Channel 1 Trend Low Alarm Bit I:e.0/5
Bit Channel 2 Trend High Alarm Bit I:e.0/6
Bit Channel 2 Trend Low Alarm Bit I:e.0/7
Bit Learn Cycle Indicator Bit I:e.0/9
Integer Channel 1 Load Value I:e.1
Integer Channel 2 Load Value I:e.2
Integer Channel 1 Deviation value in Percent I:e.3
Integer Channel 2 Deviation value in Percent I:e.4
Integer Channel 1 Sample value in Ton I:e.5
Integer Channel 2 Sample value in Ton I:e.6
Integer Sample Count I:e.7
Channel 1 High Capacity Alarm Bit
When on (1) channel 1 load has met or exceeded the high alarm limit.
Load values are stored at integer word I:e.1.
Channel 1 Low Capacity Alarm Bit
When on (1) channel 1 load has met or dropped below the low alarm limit.
Load values are stored at integer word I:e.1.
Channel 2 High Capacity Alarm Bit
When on (1) channel 2 load has met or exceeded the high alarm limit.
Load value is stored at integer word I:e.2.
Channel 2 Low Capacity Alarm Bit
When on (1) channel 2 load has met or dropped below the low alarm limit.
Load value is stored at integer word I:e.2
Page 3-3

Chapter 3
Channel 1 High Trend Alarm Bit
When on (1) channel 1 load has met or exceeded the high alarm percentage of sample.
Load values are stored at integer word I:e.1.
Percent of deviation of sample is stored at integer word I:e.5
Percent of deviation of sample is stored at integer word I:e.5
Channel 1 Low Trend Alarm Bit
When on (1) channel 1 load has met or dropped below the low alarm percentage of sample.
Load values are stored at integer word I:e.1.
Percent of deviation of sample is stored at integer word I:e.5
Channel 2 High Trend Alarm Bit
When on (1) channel 2 load has met or exceeded the high alarm limit.
Load value is stored at integer word I:e.2.
Percent of deviation of sample is stored at integer word I:e.6
Channel 2 Low Trend Alarm Bit
When on (1) channel 2 load has met or dropped below the low alarm percentage of sample.
Load value is stored at integer word I:e.2.
Percent of deviation of sample is stored at integer word I:e.6
Channel 1 Load Value (I:e.1)
Integer word represents peak load on channel 1 for current machine cycle.
If Reverse Bit (O:e.0/5) is on (1) value is reverse load on channel 1 for current machine cycle.
Channel 2 Load Value (I:e.2)
Integer word represents peak load on channel 2 for current machine cycle.
If Reverse Bit (O:e.0/5) is on (1) value is reverse load on channel 2 for current machine cycle.
Note: If O:e.0/1 is set to 1 then A/D Value is integer word for calibration set.
Channel 1 Percent of Deviation (I:e.3)
Integer word represents the percentage of change current peak load is to sample peak load.
Channel 2 Percent of Deviation (I:e.4)
Integer word represents the percentage of change current peak load is to sample peak load.
Channel 1 Average Sample Value (I:e.5)
Integer word represents the average of the sample load values on channel 1 in Tons.
Channel 2 Average Sample Value (I:e.6)
Integer word represents the average of the sample load values on channel 2 in Tons.
Sample Counter (I:e.7)
Counter used for number of Sample Count.
Page 3-4