Hardy Easy 8 User Manual

EASY 8 Quick Start & Programming Guide

Section 1: Wiring Guide

Section 2: Function Block Description

Section 3: Using Function Blocks

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Hardy HI 2080

9440 Carroll Park Dr. · Suite 150 · San Diego, CA 92121-5201· 858/278-2710·

800/821-5831 Fax [phone] · Web www.hard ysolutions.com

Section 1: Wiring Guide

1 Excitation + 7 No Connect
2 Sense + 8 No Connect
3 Signal + 9 Floating Ground
4 Signal - 10 Floating Ground
5 Sense - 11 Floating Ground
6 Excitation - 12 Floating Ground

EXCITATION VOLTAGE: 5 VDC

4-WIRE SENSOR

Important: 4-wire sensor jump pins 1 & 2 and 5 & 6

ATTENTION: Do not insert or remove module while the PLC is powered.
“Hot-Swapping” may result in damage to the PLC and/or the module.

6-WIRE SENSOR

Section 2: Function Block Description

NAME FUNCTION

Read_Wt_status Provides weight and status reading from Plug In Module (PIM)

Zero Sets Gross weight reading to zero
Tare Sets Net weight reading to zero

Cal_Low Sets low calibration point

Cal_High Sets high calibration point

Set_Config Writes configuration parameters to PIM

Read_Configuration Read configuration parameters from PIM

Save Saves configuration parameters to non-volatile memory

Set_Sensitivity_Filter Sets gain and condition of filter in PIM

Set_defaults Sets PIM back to default settings

Get_Cmd_Status Read status of previous command

Get_Version Reads PIM firmware version information

Read_Wt_status: This block will read the weight, both gross and net,

This would be used constantly to update the weight reading and the status of the module.
The motion status indicates if the weight reading is stable.

Zero: Function block used to zero the gross weight. Using this function block will force the gross weight

to a zero value if the weight does not return to zero (for example when residual material is left in a
vessel).

and the status of the module.

Tare: Function to zero the Net weight. Using this function block will cause the net weight to go to a

value of zero. Typically used to eliminate the weight of containers or other material on the scale so that
only the weight of the material is shown.

Cal_Low: Calibration low Command. This will set the low point in a two point calibration process. This

would be used to normally set the low point at zero of a new calibration on the scale. This will use the
Cal Low Weight as the reference for this low point and must match the amount of live load weight on
the scale.

Cal_High: Calibration High Command. This will set the high point in a two point calibration. This would

be used to set the high point of a new calibration. This will use the Span setting as the reference and
must match the amount of live load weight placed on the scale for this command.

Set_Config: This will write the configuration parameters to the module. These parameters are:

NumAverages - the number of readings taken an averaged together to report as the weight;

Motion Tolerance - sets the amount of weight change over a one second period that determines

the “stability” of the weight reading. A Motion indication means the weight is changing on the

scale, this motion status will prevent the unit from doing a zero command, tare command, cal
low command or a cal high command.

Cal Low Weight - the reference for the amount of live load weight you have on the scale at the

time of the Cal Low Command being run;

Cal High Weight - the reference for the amount of live load weight you have on the scale at the

time of the Cal High Command being run.

Read_Configuration: Reads the configuration of the parameters established during the Set_Config and

the Set_Sensitivity_Filter . This would be to check to see what configuration parameters are set in the
PIM.

Save: Saves configuration setting to non-volatile memory. This should be used any time changes to the

configuration or calibration are made to prevent loss of settings during a power-cycle.

Set_Sensitivity_Filter: Resets the gain of the A/D converter, sets filter and turns fir filter on/off. This

adjusts the gain of the converter to get better resolution with different mv/v ratings of the load cells.
Suggested Gain setting below.

Get_Cmd_Status: Reads the status of the last command sent to the module.

Get_Version: Reads the version of the firmware in the module. Typically used in troubleshooting to

provide module information during a Technical Support event.

Set_Defaults: Sets the module back to factory default settings.

Section 3: Using Function Blocks

1. Start a new project with Connected Components Workbench software.

2. Choose your specific controller from a list on the right side of the screen by double clicking.

3. After double clicking your controller, a new project will open in the Project Organizer

window.

4. Right click on the Micro830 and select to import an exchange file.

5. Select IMPORT EXCHANGE FILE and navigate to the EASY 8 FUNCTION BLOCK file.

(download:

http://www.hardyinst.com/process_weighing/plc+plug-in+modules/easy+8%99+series+weigh+scale+module

)

Select ALL or just the function blocks required for your project.

In the example below, Weight and Zero function blocks were selected.
If you find you wish to add function blocks to a project, import them later in the same way.

6. After you have imported the function blocks, they will show up in the Project Organizer

window as shown.

7. To create a ladder program using the function

blocks, right click on “Programs” and add a new
LD: Ladder Diagram.