Avery Weigh-Tronix PC-820 Manual de usuario

PC-820/821 Parts Counter

Service Manual

2PC-820/821 Parts Counter Service Manual

PC-820/821 Parts Counter Service Manual

Table of Contents

Table of Contents........................................................................................................3

Specifications ..............................................................................................................4

Introduction .................................................................................................................5

About This Manual ................................................................................................5

PC-820 Description .....................................................................................................5

Front Panel Keys...................................................................................................6

Hard Keys........................................................................................................6

PC-820 Menus ............................................................................................................6

Entering the Menu.................................................................................................7

Test Menu .............................................................................................................7

Setup Menus .........................................................................................................9

User Menu (password is 111) .........................................................................9

Configuration Menu (password is 2045) .......................................................12

Calibration Menu (password is 30456)..........................................................20

Configuration of Remote 1 for Analog Scale Base .................................21

Calibration Error Messages.....................................................................21

Serial Communication ...............................................................................................22

Scale Status Byte Definition................................................................................24

Appendix A: Available PC-820 Displays ...................................................................25

Appendix B: Tips on Using Harmonizer ....................................................................27

Technical Drawings and Parts Lists.................................................................... 29-46

10 lb / 5 kg 12" x 14" Parts and Assembly..........................................................29

Draft Shield Parts and Assembly ........................................................................30

50 lb / 25 kg and 100 lb / 50 kg 12" x 14" Parts and Assembly..........................31

System Wiring Block Diagram ............................................................................32

Main Computer & I/O, Remote Analog, Internal Battery Charger PC Boards ....33

Display & Interface Bd. Display Assembly, Keypad Assembly and Matrix .........34

Internal Battery & Charger PC Board Parts and Assembly ................................35

Dimensional Outline for 12" x 14" Base ..............................................................36

COM2 Interface Cable Options and Pin-outs .....................................................37

COM1 Interface Cables, 820 to Quartzell Base and 820 to Eltron Printer

Cable Assemblies..........................................................................................38

BP-25R External Battery .....................................................................................39

Zeus Kits, Internal and External ..........................................................................40

SSCU Parts and Assembly .................................................................................41

SSCU-8 Remote Expanded Control I/O Board ...................................................42

SSCU External (16) I/O Cutoff Expansion Board ...............................................43

Remote (TTL) Keyboard Options........................................................................44

Opto-22 Control Interface Devices......................................................................45

Wiring Diagram for Input and Output Modules ...................................................46

Pages are numbered consecutively beginning with the cover page.

4PC-820/821 Parts Counter Service Manual

Capacity Resolution Expanded

Resolution

10 lb .001 lb .00005 lb

50 lb .005 lb .0002 lb

100 lb .01 lb .0005 lb

5 Kg .0005 Kg .00002 Kg

25 Kg .002 Kg .0001 Kg

50 Kg .005 Kg .0002 Kg

In-line transformer, 115 VAC, 50/60 Hz

Optional 230 VAC, 50/60 Hz

Zero, Tare, Enter, Escape, Clear, 0-9, Decimal Point, Previous, Next, and 5

Softkeys

All keys provide users with tactile and (configurable) audio acknowledgment

when they are activated

Display symbols include Stability, Active Tare, Current Base, Center of

Zero, Low Battery, Unit of Measure and Display Label

240 x 64 dot matrix LCD display

5" x 1.33" displayable area

PC-820: Cold cathode fluorescent backlit (white on blue)

PC-821: LCD without backlight

Selectable update rate: 0.5, 1, 2, or 5 times per second

Pounds, kilograms, grams, ounces, pounds and ounces, and two fully

customizable units of measure

Up to 1 part in 500,000

Battery protected real time clock (Y2K compliant)

Quartzell: 1 part in 2,000,000

Analog (optional): 1,000,000 counts analog

Fully selectable to ignore noise and vibration

Capable of storing 1000 records including part number, description, count

accumulator, tare, and piece weight. (Database is very flexible and number

of records is dependent upon record content and BASIC application.)

Scale has 2 power-saving timers; one controls backlight and another has

capability of shutting the scale off. Any keypress wakes the scale.

Specifications

Capacities and Resolutions

Power

Operational keys

Annunciators

Display

Display rate

Units of measure

Displayed resolution

Time and date

Internal resolution

Harmonizer digital filtering

Memory

Power saving

PC-820/821 Parts Counter Service Manual

Introduction

PC-820 Description

This manual covers the information you need to configure and service your

PC-820 parts counting scale.

Major sections of this manual are headed by titles in a black bar like Intro-

duction above. Subheadings appear in the left column. Instructions and text

appear on the right side of the page. Occasionally notes, tips, and special

instructions appear in the left column.

The PC-820 is a 12” x 14” scale with an attached 5” x 12” display housing.

See Figure 1. The scale base is cast aluminum enclosing a Quartzell®

weight sensor and electronics package. The scale platter is stainless steel.

Figure 1

PC-820 front panel

The display is a 64 x 240 dot matrix which allows several lines of text and

the ability to display graphics. See Appendix A: Available PC-820 Displays.

There are five softkeys located directly below the display, a numeric keypad

to the right and six other labeled keys. The keys will be described in the next

section.

Built into the PC-820 are two RS-232 serial communication ports (Com1 and

Com2). Com1 can also be used as an RS-485 port. See the section Serial

Communication for information on setting up Com1 as RS-485. Com2 can

be a bidirectional RS-232 port or a printer, keyboard and scanner port.

This scale has an internal database and can have the option card to support

a remote Quartzell®or analog base. Com3 is the local Quartzell interface.

About This Manual

The unit must be plugged into

an easily accessible outlet that

is earth grounded and of the

appropriatevoltage.

To increase the contrast of the

display, press and hold the

CLEAR and 9 keys until the

desired contrast is reached. To

decrease contrast, press and

hold the CLEAR and 3 keys.

References to the PC-820 also

apply to the PC-821.

If you upgrade the firmware in

the scale, you must download

your software program from

SimPoser.

6PC-820/821 Parts Counter Service Manual

Front Panel Keys The keys on the front panel of the PC-820 are of two types; hard keys and

softkeys. Hard keys are labeled directly and softkey labels appear on the

display. Softkeys function differently at different times and their labels

change as needed.

Below are brief descriptions for each of the hard key functions:

ESCAPE Press the ESCAPE key to back out of menus or cancel a

numeric entry without accepting the value.

ZERO Press the ZERO key to establish a zero reference. When

the scale is at zero, the center-of-zero icon will be displayed.

When scale motion ceases, the stability symbol will appear

above the center-of-zero icon.

TARE With an empty container on the scale, press the TARE key

to enter an active tare weight. The display shows net weight.

ENTER Press the ENTER key to accept displayed information,

whether it is numeric characters you have keyed in or if it is

a choice displayed while in the menus.

CLEAR Press the CLEAR key to clear a displayed number while in

the data entry mode.

0-9 & .Use the numeric keys for entering in numbers or a decimal.

Right Arrow Press this key to scroll through extra softkeys available in

some applications and to move to the right in the menus.

Left Arrow Press this key to scroll through extra softkeys available in

some applications and to move to the left in the menus.

Hard Keys

PC-820 Menus

Information about the scale, testing functions, data management, scale

configuration, and calibration are accessed through menus, some of which

are protected by passwords. The password protected menus appear under

Setup. The user menu is also protected by a password. It is covered in the

User's Manual.

Figure 2

Menu Structure

Center of Zero icon

Stable scale icon

PC-820/821 Parts Counter Service Manual

The display will instruct you

how to exit from a display

screen. Press ESCAPE to

back out of most screens. This

will cancel any values you’ve

keyed in. Press ENTER to

accept changed values.

Entering the Menu To enter the menu, press and hold the ESCAPE key until the unit beeps.

The menu structure is pictured in Figure 2. The words in the rectangles

represent softkeys you will see on the display.

Upon entering the menu the display shows the following softkeys:

About Press this softkey to see the scale model name, firmware ver-

sion, license number and licensed company of the downloader

program, the file name, download time and date the file was

downloaded.

Audit Press this softkey to display the calibration and configuration

audit trail counters. The configuration counter increments each

time the configuration menu is accessed or when a new configu-

ration file is downloaded. The calibration counter increments each

time a base is calibrated. These numbers cannot be erased or

changed by the user.

Test Press this softkey to access the test menus for the display,

keypad, local or remote Quartzell bases or a remote analog base,

serial ports, outputs and inputs. Follow prompts on the display to

accomplish these tests. See Figure 3 and the Test Menu section

below for more information.

Setup Press this softkey to access the password protected menus. The

names and passwords for the Setup menus are:

User menu password - 111

Configuration menu password - 2045

Calibration menu password - 30456

See Figure 4 and the Setup Menu section below for more infor-

mation.

Off Press this softkey to turn the PC-820 off. Pressing any key will

turn the scale on.

The Test menu, shown in Figure 3, lets you test your scale operation.

Figure 3

Test Menu

Following are explanations of the tests in this menu.

Test Menu

8PC-820/821 Parts Counter Service Manual

Display This test continuously cycles the display through various pat-

terns.

Keypad This test lets you check each front panel key for proper opera-

tion.

Bases This key allows you to view the output from the selected base.

(Local, Remote 1 and Remote 2, if connected).

For Quartzell bases you will see a screen similar to this:

This screen shows you:

• the serial number of the Quartzell in the currently selected

base

• the raw counts from the cell (which should be stable ±200

counts and increase when weight is applied)

• the tension frequency (Ft) and compression frequency (Fc)

(Each should be as stable as the other and within 10% of

each other. As weight increases the tension count should

increase and the compression count should decrease.)

• Cell size (30Kg for example)/Display resolution for maximum

efficiency (10000 is shown)

• Software version of the cell (vD.A in this example)

For analog bases you are shown:

• a raw count value and its equivalent mV/V value. (These

values should be positive and increase as weight is applied.

Serial Use this to test your ports. Select Port #1, 2, or 3 then short the

TX and RX on the selected port. The display will change from

NO LOOP to LOOP indicating the port is good.

Port 1 is Comm1, a 9-pin connector. Short pins 2 and 3 for

Loop/No Loop test. Short pins 7 and 8 for Ready/Busy test.

Port 2 is Comm2, a 15 pin connector. Short pins 3 and 5 for

Loop/No Loop test on RS-232-A. Short pins 2 and 5 for Loop/No

Loop test on RS-232-B.

Port 3 is the local Quartzell. Use the local base test to verify

current cell communication.

Outputs Allows you to Activate/Deactivate any output setpoints you are

using on the SSCU8 to verify correct hardware operation during

installation or for troubleshooting purposes.

Inputs The same as Outputs except you are activating an input set-

point device such as a switch or contact closure remotely and

monitoring it with this menu.

Display Softkey

Keypad Softkey

Bases Softkey

Serial Softkey

Outputs Softkey

Inputs Softkey

PC-820/821 Parts Counter Service Manual

This section covers the User, Configuration, and Calibration menus shown

in Figure 4a and 4b.

The user menu is explained below. Refer to Figure 4a. Access this menu by

following these steps:

1. Press and hold the ESCAPE key

until the scale beeps and new

softkeys appear.

2. Press the SETUP softkey. . . Scale prompts for a password.

3. Key in 111 and press ENTER. . . New softkeys appear:

Set, Select and BASIC. Each of

these are discussed below.

Press Set:

The following softkeys are displayed:

Clock Follow the prompts on the screen to set the time and date.

Tare Prompts you to enter a tare value. Use this when you want to set

a long term tare value for all scales. If you set this tare you should

disable the TARE key. See the Service Manual.

Pc. Wt. Prompts you to enter a piece weight value. Use this when you

want to set a long term piece weight value. If you set this tare you

should disable the SAMPLE softkey. See the Service Manual.

Peaks Prompts if you want to clear the minimum and maximum peak

values in memory. Display gives you YES and NO softkeys.

Accum. Prompts if you want to clear all accumulators. Display gives you

YES and NO softkeys. You are then asked if you want to enable

or disable count subtracting. Choose from YES or NO.

Graph Prompts you to key in values for each of the following values

used when in checkweigher display:

Min for minimum value

Under for lowest acceptable target weight

Over for highest acceptable target weight

Max for maximum value

Basis select the basis from this list of values:

0 = Gross

1 = Net

2 = Tare

3 = Min

4 = Max

5 = ROC

6 = Gross total

7 = Net total

8 = Count total

9 = Transaction total

10 = Count

11 = Variable

12 = Piece weight

13 = ADC

User Menu (password is

111)

Set Softkey

Setup Menus

10 PC-820/821 Parts Counter Service Manual

Figure 4a

Setup Menus

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