DECLINING WEIGHT BLENDING SYSTEM

OPERATION MANUAL

12285 E. MAIN ST.

MARSHALL, IL 62441

PHONE: 217-826-6352

FAX: 217-826-8551

WEB SITE: www.yargus.com

OPENING SCREEN

The OPENING SCREEN is just the screen that the PLC system boots up to if ever a

power cycle was to occur. From here you can navigate to any location in the system. At the

bottom of this screen and all other screens is the menu bar. Most of the operations will be

performed through the SYSTEM MENU and VAVLE MENU buttons. A description of each

button will follow later in the manual.

SYSTEM MENU button

The SYSTEM MENU button groups system related screens

DISPLAY SETTINGS

Here you can adjust the display brightness, activate a screen saver and set the system time

and date. For brightness control you would just arrow up or arrow down. The screen saver is

activated by pressing its button. The time and date can be set by pressing the SET TIME/DATE

button and follow the format shown.

BLEND ENTRY

Blend Entry begins the process of running a blend. Here you would enter the weight of

each chemical in each hopper. The name of each chemical is listed above the hopper weight

entry button. Entering actual weight per each hopper would be the method used when not

running a ratio blend. Running a ratio blend is described later in this manual. After you enter in

all desired weight for each chemical, you would then press the RUN BLEND button. Any alarms

that may occur will appear towards the bottom of the screen. For instance if weight is entered for

a hopper and that hopper does not have its VOLUME CONSTANT, BULK DENSITY, or

VALVE DELAY set, an alarm will appear. These three characteristics must be set before

running a hopper. The numeric values shown at each hopper is the valve RPM speed at which the

valve will run. As the weight changes for each valve, these values may also change. 75RPM is

the fastest and 8RPM is the slowest speed a valve can start out at.

RUN BLEND

The RUN BLEND screen can only be accessed through the Blend Entry screen when weight has

been entered in one or more valves. Here only the hopper or hoppers with blend weight will

appear. Also the run-time is also calculated and displayed. The color scheme for each valve is as

follows: green indicated the valve is in DW mode, Silver indicates volumetric mode, and orange

indicates impregnation mode. Once the run-time is displayed and the START button, the blend

will start when the operator presses the START button. After a blend is started, this same button

becomes the PAUSE button for pausing blends. Then START again to re-start. After a blend has

started a CANCEL button appears which can be used to cancel a blend completely.

RUN TAPERED BLENDER

RUN TAPERED BLENDER is the only screen for running the tapered blender. It can be

run at any time separate from the RUN BLEND mentioned above. First you press the start button

to turn on the blender. If the HOA switch on front of the PLC panel is at Auto the gate would

close at this time. If the HOA switch is in HAND you would verify the gate status is closed and

if not press the CLOSE button. Now add weight to the blender and view the weight here on the

screen or the large display. After finishing adding the weight the REQUIRED box shows how

much liquid is needed for impregnation. Press the START TAPERED BLENDER button and the

impregnation will begin and stop when it’s reached the REQUIRED amount.

SPOUT LOCATION

The SPOUT LOCATION screen can also be accessed through the RUN BLEND screen.

Here you just select which spout you want your blend to travel through. The current location of

the SPOUT is shown in the top right corner. The SP1,SP2…names can be changed to the users

liking of 14 characters or less.

LOADOUT DELAYS

The LOADOUT DELAY should be set to a high enough number so at the end of a blend

all product has left the load out section/s. This would include all conveying sections after the

under bin. The delay time is in seconds.

I/O SCREEN

The I/O SCREEN is mainly used for troubleshooting and/or maintenance. Here you can

view all input and output status.

VALVE MENU button

The VALVE MENU button groups valve related screens.

VALVE MODE

The VALVE MODE screen is used to switch a valve or valves from a DW mode

to a volumetric mode. This can be useful if a load cell ever quit working you could come

here and switch to volume metric mode and continue to use that hopper. When the load

cell got replaced or repaired you could then switch back to DW mode.

VOLUME CONSTANT

VOLUME CONSTANT screen is used to set the volume constant of each valve. In a DW

system this value can be self adjusted or calibrated at the end of each blend for more precise

weight loss accuracy.

BULK DENSITY

Each chemical for each hopper should have its BULK DENSITY measured and the

measured values recorded here.

EMPTY HOPPERS

EMPTY HOPPER screen is used for cleaning out a hopper in order to fill that hopper

with a different chemical. There is no system feedback when emptying a hopper. Once you press

the button the hopper will run until you press the button again to stop it.

SCALE READINGS

The SCALE READINGS screen will allow all hopper weight to be read if it is a DW

valve and it’s in DW mode.

VALVE DELAYS

The value entered here for each DELAY VALVE is in seconds and should be a measured

time of how long it takes for the product to get from one valve to the next valve in front of it.

This run-time can be calculated or simply entered by using a stop watch. A DELAY VALUE

cannot be equal to zero. If a zero is needed a value of .01 is sufficient. The VALVE DELAY

time reference is the end of the under bin. This is referred to as the focal point. Start out by

measuring the time the chemical of the last valve (closest to the focal point) takes to reach the

focal point. After this then measure the time the chemical of the next valve back (second to last)

takes to reach the valve just in front of it takes. The one just measured. And repeat this process

until you reach the first valve.

VALVE TEXT ENTRY

The chemical name that’s in each hopper can be entered here and is used throughout the

system. This name can be 14 characters or less and can be the same name that’s in another

hopper.