NCI 6702 User manual

Models 6702, 6710, and 6720
User Manual

UNITED STATES
This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial
environment. This equipment generates , uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
CANADA
This digital apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatus set out in the radio Interference
Regulations of the Canadian Department of Communications.
Le present appareil numerique n’emet pas de bruits radioelectroniques
depassant les limites applicables aux appareils numeriques de la Class A
prescrites dans le Reglement sur le brouillage radioelectrique que edicte
par le ministre des Communications du Canada
UNITED STATES
This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial
environment. This equipment generates , uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
CANADA
This digital apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatus set out in the radio Interference
Regulations of the Canadian Department of Communications.
Le present appareil numerique n’emet pas de bruits radioelectroniques
depassant les limites applicables aux appareils numeriques de la Class A
prescrites dans le Reglement sur le brouillage radioelectrique que edicte
par le ministre des Communications du Canada
CAUTION
Risk of electrical shock. Do not remove cover. No user serviceable
parts inside. Refer servicing to qualified service personnel.
Weigh-Tronix reserves the right to change
specifications at any time.

* These capacities require a 6-digit display.
Model 6702
US & Canada Approved Legal for trade
NTEP approval -COC #95-070A3
Canada -COC# AM-5076
Model 6710
US & Canada Approved Legal for trade
NTEP approval -COC #92-051A2/95-070A3
Canada -COC# AM-5076
Model 6720
US & Canada Approved Legal for trade
NTEP approval -COC # 95-070
Canada -COC# AM-5076
Initial automatic zero setting is +/-10% of maximum capacity -active at power up.
Manual zero setting range is +/-2% of maximum capacity -active using
the ZERO key.
Input : 120 VAC +10%-15% Standard 3 wire w/ground
Output: 15 VDC @.3 Amps DC minimum
50/60 Hz Standard
0.1 amp maximum
Over capacity indication will be given with upper dashes on the display whenever
9d over maximum capacity is exceeded or the four digit display limit is exceeded. 1
IMPORTANT !
Weights & Measures requires inspection of scale before scale is placed into operation
Specifications
Capacity /
Resolution
Agency
Requirements
Zero window
Transformer voltage
Frequency
Power Requirements
Over Capacity limits
Model Capacity (lb) Capacity (kg) Divisions
6702 - 7 10 x .005 7 x .002 2000/3500d
15 x .005* 3500d
6702 - 15 30 x .01 15 x .005 * 3000d
6710 - 7 10 x .005 7 x .002 2000/3500d
15 x .005* 3500d
6710 - 15 30 x .01 15 x .005 * 3000d
6720 - 7 10 x .005 7 x .002 2000/3500d
15 x .005* 3500d
6720 - 15 30 x .01 15 x .005 * 3000d
6720 - 30 60 x .02 30 x .01 3000d
6720 - 60 100 x .05 60 x .02 2000/3000d
120 x .05 * 3000d

About This Manual
Modes of Operation
This manual covers the service needs of the model 6702, 6710, and 6720 Point of Sale
(POS) bench scales. This maul is divided into these general areas:
•About This Manual
•Modes of operation
Diagnostics Mode
Configuration Mode
Calibration Mode
•Error Codes
•Communications
Major section headings of the manual appear in a black bar as shown above.
Subsection headings appear in the left column of each page withcorresponding
information in the wider, right column. Notes and tips about operation of the
scale will appear in italized text in the left column where appropriate.
If you have any questions about your scale please contact your local dealer.
The 6702/6710/6720 powers up in normal weighing mode, ready for weighing opera-
tions. You can access the MENU Mode by setting switch 1 shown in figure 1
(Model 6702 & 6710) or figure 2 (Model 6720), to the OPEN or Menu Mode position.
Accessing the Menu
Mode
Bottom view of 6710 scale.
Figure 1
6702 & 6710
Switch location 2

Modes of Operation -Continued
With switch 1 in the Menu Mode or Open position, there are three modes available
to you. They are as follows:
Diagnostic Mode -used to test areas of the scale’s function
Configuration Mode -used to configure your scale for your application
Calibration Mode -used when calibrating the scale
The structure for these menus is shown in Figure 3. The following page is specific information
about each mode and following that are the step-by-step instructions for accessing them.
Top view of 6720 scale with platter removed
Figure 2
6720 Switch Location
3
The 6720 remote display is used for weight only, the ZERO and TEST keys are inoperable
when the internal display is in use. Dip switch 3 select internal or external display keypad
operation.
-Internal & External Display Selection -

Normal Weighing
Mode
Set switch 1 to
the OPEN position
Menu Mode
dIAG ConF CAL
60 H
LB
9.995
Load
0
Load
10
50 H
KILO
29.99 30.01 60.02 99.95
donE
FiLt bAUd Prot donE
NCI ECR 8213
Choose
from
a list of
15 baud
and parity
options
Fast SLO
dISP rA rO I/O divA divn donE
Performs
a display
test
Performs
a test
of RAM
Performs
a test
ROM
Performs
aninput/output
test
Performs
a division
test w/ AZT
Performs
a division
test w/o
AZT
Returnsto
dIAG mode
Figure 3
67XX Menu Structure
Press the ZERO key to move in the menu.
Press the TEST key to move in the menu.
After making a selection the display generally
returns to the first parameter in the list.
After choosing donE, the display shows dIAG.
What is displayed here depends on what
capacity and unit of measure you’ve chosen
above. You may choose alternate calibration
points by pressing the ZERO key.
If scale is placed in a noisy environment
set slow filter to minimize the effects.
120.0515.005
9.995 15.005 30.01 60.027.002
2250
4
34-F
ATT

Diagnostics Mode
Diagnostic (dIAG)
Mode The diagnostic (dIAG) mode menu lets you test specific areas of the scale’s function.
These areas are:
Display (dISP) - - Shows the version and revision of the
software, followed by a display segment
test.
RAM (rA) - Performs a non-destructive test of RAM
in the processor. Displays pASS or fAIL.
ROM (rO) - Performs a checksum of all locations in
ROM in the processor. Displays pASS
or fAIL.
Input/Output (I/O) -Data is output by the scale and through
the use of a loopback connector the data
is immediately read back into the receive
channel and verified against what was sent.
PASS or FAIL is displayed. Requires a jumper
(short) between transmit & receive data lines.
Division, Test w/AZT (divA)-Weight data is normalized to 120,000
counts of displayed resolution. AZT is
enabled.
Division, test w/o / AZT (divn) - Weight data is normalized to 120,000
counts of displayed resolution. AZT is
disabled.
Follow these steps to access and the tests in the dIAG menu.
1. From normal weighing mode , move
switch 1to the Menu Mode or OPEN
position. (See Figures 1 & 2) Display shows dIAG.
2. Press the TEST key. . . dISP is displayed. This stands for
display.
3. Press the TEST key to perform
the display test described earlier. . Display test is performed and the
shows dISP after the test is
completed.
4. Press the ZERO key . . . rA is displayed. This stands for the
RAM test.
Step-by-Step
Instructions for
dIAG Mode
5

5. Press the TEST key to perform
the RAM test. . . PASS or FAIL is displayed briefly, then
dISP. If the test fails, contact your local
Weigh-Tronix distributor for service.
6. Press the ZERO key twice to
scroll to the ROM test. . . rO is displayed. This stands for the
ROM test.
7. Press the TEST key to perform
the ROM test . . . PASS or FAIL is displayed briefly, then
dISP. If the test fails, contact your local
Weigh-Tronix distributor for service.
8. Press the ZERO key three times
to scroll to the I/O test . . . I/O is displayed. This stands for the
Input/Output test.
9. With a loopback connector in
place, press the TEST key to
perform the I/O test. . . PASS or FAIL is displayed briefly, then
dISP. If the test fails, check your
connections and / or contact your
local Weigh-Tronix distributor for
service.
10. Press the ZERO key four times . . . divA is displayed. This stands for the
high resolution test with AZT enabled.
11. Press the TEST key to perform
this test. . . The display shows the weight on the
scale at a resolution of 120,000 counts.
12. Press the TEST key to stop
the test. . . dISP is displayed.
13. Press the ZERO key five times. . . divn is displayed. This stands for
the high resolution test without AZT
enabled.
14. Press the TEST key to perform
this test. . . The display shows the weight on the
scale at a resolution of 120,000
counts.
Step-by-Step
Instructions for
dIAG Mode
Press the ZEROkeyto
scroll through lists of
selections.
Press the TEST keyto
make a selection.
If you want to skip a test,
press the ZEROkey to
scroll to the next test.
Diagnostics Mode -continued
dIAG will flash every
15 seconds during the
high resolution test to
remind you that you
are doing a test and
not seeing normal
weight readings.
6

Diagnostics -continued
15. Press the TEST key to stop the
the test. . . dISP is displayed.
16. When you are finished with the
test press the ZERO key six
times, which displays donE,
and press the TEST key. . .
or place switch 1 back to dIAG is displayed.
normal mode to return back
to normal weighing mode.
Configuration Mode
The configuration (ConF)mode menu lets you configure your scale to your specific
application needs. The items you can configure are as follows:
Filtering (FiLt)-Choose between FAST and SLO filtering.
Slow should be chosen in area susceptible
to vibration. Choose FAST filtering for
more stable conditions.
Baud (bAUd)-Choose a baud and parity from table 1.
DISPLAY BAUD PARITY
12 e 1200 Even
24 e 2400 Even
48 e 4800 Even
96 e 9600 Even
19.2 e 19,200 Even
12 o 1200 Odd
24 o 2400 Odd
48 o 4800 Odd
96 o 9600 Odd
19.2 o 19,200 Odd
12 n 1200 None
24 n 2400 None
48 n 4800 None
96 n 9600 None
19.2 n 19,200 none
Protocol (Prot) -Select the RS-232 communication protocol from below:
NCI -NCI standard
ECR -Cash resister compatible
8213 -8213 compatible (Sharp)
2250 -2250 compatible (Swintec)
34-F -34-MF compatible (Sweda-Mexico)
ATT -A T & T compatible 7

Configuration Mode-Continued
Follow these steps to access and configure the items in the ConF menu. Refer to
figure 3.
1. From the dIAG display press the ZERO key
OR
From normal weighing mode, move switch 1 to
Menu Mode or OPEN position, then press
the ZERO key. . . ConF is displayed
2. Press the TEST key. . . FiLt is displayed. This stands for
filtering.
3. Press the TEST key. . . The current setting, FAST or SLO,
is displayed.
4. Use the ZERO key to toggle
between the two choices. Press
the TEST key when the choice
you want is displayed. . . Your choice is accepted and the
display shows FILt.
5. Press the ZERO key once. . . BAUD is displayed.
6. Press the TEST key. . . The current baud and parity choice
is displayed.
7. Use the ZERO key to scroll
the choices found in Table 1.
When the choice you want is
displayed, press the TEST key. . . Your choice is accepted and the
display FILt.
8. Press the ZERO key twice. . . PROT is displayed. This stands for
protocol.
9. Press the TEST key. . . The current RS-232 communication
protocol is displayed.
10. Press the ZERO key to scroll
through the choices. When the
choice you want is displayed,
press of the TEST key. . . Your choice is accepted and the
display shows FILt.
11. When you are finished with
configuring your scale press
the ZERO key three times,
which displays donE, then
press the TEST key. . . dIAG is displayed
Step-by-Step
Instructions for
ConF Mode
8

Calibration Mode
The calibration (CAL) mode menu lets you calibrate your scale. The items in the
calibration menu are as follows:
Line Frequency (50 or 60H) -Select the AC line frequency you are using.
Pounds/Kilograms (LB or KILO) -Selects the unit of measure of your calibra-
tion test weights.
Capacity (9.995, etc..) -Select the capacity of your scale.
Step-by-Step
Instructions for
CAL Mode
Follow these steps to calibrate your scale. refer to Figure 3.
1. From the dIAG display press the
ZERO key twice
OR
From normal weighing mode, move
switch 1 to the Menu Mode or
OPEN position, then press the
ZERO key twice. . . CAL is displayed. This stands for calibration.
2. Press the TEST key. . . 50 hor 60 H is displayed. This is the AC line
frequency.
3. Press the ZERO key to toggle
between the choices. When the
choice you want is displayed, press
the TEST key. . . That choice is accepted and LB or KILO is
displayed. This is the unit of measure of
your test weights.
4. Press the ZERO key to toggle
between the choices. When the
choice you want is displayed,
press the TEST key. . . That choice is accepted and a scale capacity
is displayed. Example: 9.995.
5. Press the ZERO key to toggle
between the choices. When the
choice you want is displayed,
press the TEST key. . . That choice is accepted and LOAD 0 is
displayed.
6. Clear all weight from the scale
platter and press the TEST key. . . After a brief wait LOAD 10 is displayed .
10 is used only as an example here. 9

Calibration Mode -Continued
7. Place ten pounds of test weights on
the scale and press the TEST key. After a brief wait DONE is displayed.
8. Press the TEST key. . . DIAG is displayed.
or
9. Return switch 1 to the closed
position. . . The scale returns to normal weighing mode.
The scale is now tested, configured and calibrated. It is ready for use in your application.
Error Codes
Any system errors detected by the scale will be displayed as the letter Efollowed by
a two-digit error code. Press the TEST key to continue operation. If a calibration
error occurs the only way to clear it is by recalibrating the scale.
The error codes are broken down into two hexadecimal numbers, with each bit
defining a single error condition. The error codes are defined as follows:
Most Significant
Digit Least Significant Digit
8 4 2 1 8 4 2 1
Reserved
For
Future
Use
Calibration error
ROM error
RAM error
Serial EE PROM error
10

Communication
The 67XX is capable of interfacing with an EIA Standard RS-232, full duplex,
asynchronous, smart device, or 4-bit parallel interface for output of weight data to
an ECR device. The 67XX 15 pin style is configured as a 4-Bit Parallel standard
from the factory. To configure the 67XX to the RS-232 interface operation, there
is a dip shunt jumper located at JMP 2 on the main PCB that needs to be positioned with
shortening pins placed away from the DE-15 connector or to the inside of the PCB. The
second uses a DE-9 connector and is only capable of communicating in the EIA Standard
RS-232 method.
This standard will be used by all products other than ECR scales.
Symbol Key: <ETX> End of Text character (03) hex
<LF> Line Feed character (0A hex)
<CR> Carriage Return character (0D hex)
<SP> Space (20 hex)
x Character from display including minus sign.
hh. . . Two or more status bytes
uu Units of measure (lb, kg, oz, g, etc. using ANSI standard
abbreviations)
NCI Serial
Communications
Protocol
Mandatory Commands
Command Scale Response Results
W<CR> <LF>xxxx.xxuu<CR>
<LF>hh...<CR><ETX> Returns decimal weight with units plus scale status.
or
<LF>xxxxxx<CR> Returns contents of display
<LF>hh...<CR><ETX> (other than wt) & scale status
S<CR> <LF>hh...<CR><ETX> Returns to scale status
Z<CR> <LF>hh...<CR><ETX> Scale is zeroed, returns status.
H<CR> <LF>xxxx.xxuu<CR>
<LR>hh...<CR><ETX> Returns decimal wt in 10x with units plus scale status.
or
<LF>xxxx.xxoz<CR>
<LF>hh...<CR><ETX> Returns lb-oz wt in 10X with units plus scale status(if required by
application).
or
<LF>xxxxxx<CR>
<LF>hh...<CR><ETX> Returns contents of display (other than wt) & scale status
all else <LF>?<CR><ETX> Unrecognized command
11

Communication -Continued
Implementation of this command will be mandatory. This command causes the scale
to return to a WYSIWYG (What you see is what you get) of its display when it is in
normal weighing mode. That is, the scale will send whatever is showing on its display
including any minus sign/and or decimal point. If it is weight, the units of measure will
be returned in addition to the displayed weight. For decimal weight, the length of the
weight field will be equal to the length of the scale's display plus two for the units, e.g.,
("lb"). Units of measure will appear in their ANSI standard abbreviation form ("lb" for
pounds, "kg" for kilograms, etc.) If the scale is displaying all upper bars ("over capacity"),
the weight field will be filled with carets("^^^^^^"). If the scale is displaying all lower
bars (under capacity), the weight field will be filled with underscores (" "). If the
scale is displaying middle bars (zeroing error), the weight field will be filled with dashes
("------"). These examples are for scale with a 6-digit display.
Weight
Command ("W")
Scale Status
Command ('S')
Implementation of this command will be mandatory. There will be at least two status
bytes. If bit 6 of the second status byte is set then there will be a third byte. Bit 6 of each
byte will indicate whether or not another status byte follows. The bit will be clear (0) in
the last status byte. At this time only the first three bytes are defined. Others may be added
in the future. The status bits are defined as follows:
Bit First Status Byte Second Status Byte
01 = Scale in motion
0 = Stable 1 = Under capacity 0 = Not under capacity
11 = Scale at zero
0 = Not at zero 1 = Over capacity 0 = Not over capacity
21 = RAM error
0 = No RAM error 1 = ROM error 0 = No ROM error
31 = EEPROM error
0 = No EEPROM error 1 = Faulty calibration data 0 = caliobration data okay
4Always 1 Always 1
5Always 1 Always 1
6Always 0 1 = Byte follows
0 = Last byte
7Parity Parity
Zero
Command ('Z')
Implementation of this command will be mandatory. If zeroing criteria are met, the scale
will is zeroed. In any case, scale status is returned.
12

Communication -Continued
This command will be optional. It is the same as the "W" command except that when
weight is returned, it is returned with ten times the scale's displayed resolution. Thus,
for decimal weight, the length of the weight field is equal to the length of the scale's
display plus three or four, and for pounds-ounce it will be the display length plus five
or six (depending on the presence of a decimal point.)
High Resolution
Command ('H')
When the scale receives an unrecognised or unsupported command, it returns a
question mark.
Undefined
Commands
The ECR serial communication protocol adheres to the pre-existing "standard" for ECR
scales. It also includes optional commands and the new scale status bit definitions
(described in the general protocol) as extensions which do no affect backwards compatibility.
This standard will be used by all other products other than ECR scales.
Symbol Key: <ETX> End of Text character (03 hex)
<LF> Line Feed character (0A hex)
<CR> Carriage Return character (0D hex)
<SP> Space (20 hex)
x Weight numeric digit.
hh Two status bytes
uu Units of measure (LB, KG, OZ, G, etc.., all upper case)
Mandatory Commands
Command Scale Response Results
W<CR> <LF>xxx.xxuu<CR>
<LF>Shh<CR><ETX> Returns decimal weight with units plus scale status.
or
<LF>Shh<CR><ETX> Scale status only if wt <0, in
motion or out of capacity, or
zero error.
S<CR> <LF>Shh<CR><ETX> Returns to scale status
Z<CR> <LF>Shh<CR><ETX> Scale is zeroed, returns status.
all else <LF>?<CR><ETX> Unrecognized command
Scale bits will be the same as for the general protocol.
ECR Serial
Communication
Protocol
13

Communication -Continued
Baud Rates: 1200, 2400, 4800, 9600, or 19.2K
Word Length: 10 Bits
1 Start, 7 Data, 1 Parity, 1 Stop
Parity Even, Odd, or None
The scale is DTE
Serial Data
Transmission
Modem control lines
will not be supported
for RS-232.
The 15 pin version of the 67XX is shipped configured to function as a 4-Bit Parallel
interface device.
Follow these steps to configure the scale to serial RS-232 interface operation:
1. Locate the dip shunt jumper at
JMP2 on the main PC board.
2. Place the jumper so the shorting
pins are located away from the
DE-15 connector at end of the
PC board. See figure 4 below.
4-Bit Parallel
ECR Interface
Figure 4
Partial view of the main PC Board 14

Communication -Continued
The scale end of the interface cable plug is a DA 15 pin socket. The other end is as
required by your application
Below is a pin and signal list for the DA 15 pin interface cable
Interface Cable
Pin RS-232 4-Bit Parallel
1RXD Data 1
2TXD Data 2
3Sig Gnd Sig Gnd
4Data 4 Data 4
5Data 8 Data 8
6DSR Over Capacity
7DTR NC
8BHZ BHZ
9/In Motion /In Motion
10 Sig Gnd Sig Gnd
11 /Enable /Enable
12 Sig Gnd Sig Gnd
13 Clock Clock
14 Sig Gnd Sig Gnd
15 Sig Gnd Sig Gnd
There is one 9 pin DE type female connector accessible at the rear of the unit. The
functionalpinout of this cable is that of a standard PC which is as follows:
DE-9 Female Scale DE-9 Male Host
Pin Name Direction Name Direction
1JMP 1 -DCD IN
2TXD OUT RXD IN
3RXD IN TXD OUT
4JMP 1 -DTR OUT
5SG -GRD -
6JMP 1 -DSR IN
7JMP 2 -RTS OUT
8JMP 2 -CTS IN
9NC -RI IN
15

3990 Brickway Blvd.
Santa Rosa, CA 95403
Telephone [phone]
1 800-982-6622
Facsimile 1 707-579-0180
1 800-847-6743
01/20/98 PN 7424-14787C Printed in USA