Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.ricelake.com/training
or obtained by calling 715-234-9171 and asking for the training department.
Contents
About This Manual ................................................................................................................................... 1
This manual is intended for use by service technicians responsible for installing and servicing 420HE hostile
environment digital weight indicators. This manual applies to indicators using Version 1.14 of the
Configuration and calibration of the indicato
command set, or the
Revolution
®
configuration utility. See Section 3.1 on page 13 for information about
r can be accomplished using the indicator front panel keys, the EDP
420HE software.
configuration methods.
Authorized distributors and their employees can view or download this manual from the Rice Lake
Weighing Systems distributor site at
www.ricelake.com.
The Operator
Card included with this manual provides basic operating instructions for users of the 420HE. Please
leave the Operator Card with the indicator when installation and configuration are complete.
Safety
Safety Symbol Definitions
Indicates a potentially hazardous situation that, if not avoided, could result in serious injury or death, and
includes hazards that are exposed when guards are removed.
Indicates information about procedures that, if not observed, could result in damage to equipment or
corruption to and loss of data.
Safety Precautions
Do not operate or work on this equipment unless you have read and understand the instructions and
warnings in this Manual. Failure to follow the instructions o
death. Contact any Rice Lake Weighing Systems dealer for replacement manuals. Proper care is your
responsibility.
Some procedures described in this manual require work
are to be performed by qualified
service personnel only.
General Safety
Failure to heed may result in serious injury or death.
DO NOT allow minors (children) or inexper
DO NOT operate without all shields and guards in place.
DO NOT step on the unit.
DO NOT jump up and down on the scale.
DO NOT use for purposes other than weight taking.
DO NOT place fingers into slots or possible pinch points.
DO NOT use any load-bearing component that is wo
DO NOT use this product if any of the
DO NOT exceed the rated load limit of the unit.
DO NOT make alterations or modifications to the unit.
DO NOT remove or obscure warning labels.
DO NOT use near water.
Before opening the unit, ensure the power cord
Keep hands, feet and loose clothing away from moving parts.
ienced persons to operate this unit.
rn beyond 5% of the original dimension.
components are cracked.
is disconnected from the outlet.
r heed the warnings could result in injury or
inside the indicator enclosure. These procedures
420HE Installation Manual - 1
Page 6
1.0Introduction
The 420HE is a single-channel digital weight indicator housed in a NEMA 4X/IP66-rated FRP enclosure. The
indicator front panel consists of a large (1.8 in, 44.5 mm), six-digit, seven-segment LED display and six-button
keypad. Features include:
•Drives up to eight 350or sixteen 700 load cells
•Supports 4- and 6-wire load cell connections
•Two configurable digital inputs
•Two configurable digital outputs
•Electronic data processing (EDP) port for full duplex, RS-232 communications at up to 38400 bps
•Printer port for full duplex RS-232 or active transmit only 20 mA current loop communications at up to
38400 bps
•Optional analog output module provides 0–10 VDC or 0–20/4–20 m A tracking of gross or net weight
values
•Available in 115 VAC and 230 VAC versions
The 420HE is NTEP-certified and pending Measurement Canada approval for Classes III, III HD, and III L at
10,000 divisions. See
1.1Operating Modes
The 420HE has four modes of operation:
Normal (Primary) mode
Normal mode is the “default” mode of the indicator. The indicator displays gross or net weights as required,
using the LED annunciators described in Section 1.3 on page 3 to indicate scale status and the type of weight
value displayed. Once configuration is complete and a legal seal is affixed to the back of the indicator, this is
the primary mode in which the 420HE can operate.
Section 7.12 on page 49 for detailed specifications.
Setup mode
Most of the procedures described in this manual require the indicator to be in setup mode, including
configuration and calibration.
To enter setup mode, open enclosure and press the setup switch once. The indicator display changes to show
the word CONFIG.
Test mode
Test mode provides a number of diagnostic functions for the 420HE indicator. Like setup mode, test mode is
entered using the setup switch. See
test mode.
NOTE: Test mode is intended for factory use only.
Front Panel Setup Mode
Hold the UNITS key for three seconds to enter front panel setup mode. Use front panel setup to change
setpoint and to set the time and date.
Section 7.9 on page 47 for more information about entering and using
2420HE Installation Manual
Page 7
1.2Front Panel Keypad
WARNING
Figure 1-1 shows the 420HE LED annunciators,
keypad, and normal mode key functions.The symbols
shown above the keys (representing up, down,
left, right) describe the key functions assigned in setup
mode. In setup mode, the keys are used to navigate
through menus, select digits within numeric values,
and increment/decrement values. See Section 3.1.3 on
page 14 for information about using the front panel
keys in setup mode.
enter,
420HE also has a POWER key. Use the POWER key
The
to turn the indicator on or off.
The 420HE has an on/off switch for the
load cells and processor functions. Before
opening t
disconnected from the power outlet. The power outlet
must be located near the indicator to allow the operator to
easily disconnect power to the unit.
he unit, ensure the power cord is
1.3LED Annunciators
The 420HE display uses a set of six LED annunciators to provide additional information about the value being
displayed:
Figure 1-1. 420HE Front Panel, Showing LED Annunciators and Normal Mode Key Functions
Gross and Net annunciators are lit to show whether the displayed weight is a gross or net weight.
•
•Center of zero (
): Gross weight is within 0.25 graduations of zero. This annunciator lights when the
scale is zeroed.
•Standstill (
functions and printing, can only be done when
•
lb and kg annunciators indicate the units associated with the displayed value: lb=pounds, kg=kilograms.
The displayed units can also be set to short tons
): Scale is at standstill or within the specified motion band. Some operations, including tare
the standstill symbol is shown.
(tn), metric tons (t), ounces (oz), grams (g), or NONE (no
units information displayed). The lb and kg LEDs function as primary and secondary units annunciators for
some combinations of primary and secondary units. If neither primary nor secondary units are lb or kg the
annunciator is lit for primary units, kg for secondary units.
420HE Installation Manual - Introduction3
lb
Page 8
Table 1-1 shows which annunciators are used for all combinations of configured primary and secondary units. For
example:
•If the primary unit is pounds (lb) and the
kg for secondary units.
units,
•If the primary unit is pounds (lb) and the secondary unit
secondary unit is kilograms (kg), the lb LED is lit for primary
is short tons (tn), the lb LED is lit for primary
units, kg for secondary units. There is not an LED for short tons, so the kg LED is used as the secondary
units annunciator.
•If the primary unit is short tons (tn) and the
(tn), and
kg is lit for secondary units (lb). Because there is no LED for short tons, the lb and kg LEDs are
secondary unit is pounds (lb), the lb LED is lit for primary units
used as primary and secondary units annunciators.
See Section 3.2.2 on page 17 for more information about configuring primary and secondary display units.
Table 1-1. Units Annunciators, Showing Primary / Secondary LEDs Used for All Configurations
lbkgozgtntnone
1.4Indicator Operations
Basic 420HE operations are summarized below.
1.4.1Toggle Gross/Net Mode
Press the GROSS/NET key to switch the display mode
from gross to net, or from net to gross. If a tare value
has been entered or acquired, the net value is the gross
weight minus the tare.
Gross mode is shown by the
mode is shown by the
1.4.2Toggle Units
Net annunciator.
Gross annunciator; net
Press the UNITS key to switch between primary and
secondary units. The appropriate units LED under the
display is lit.
1.4.3Zero Scale
1. In gross mode, remove all weight from the
scale and wait for the standstill annunciator
(
).
1.4.5Remove Stored Tare Value
1. Remove all weight from the scale and wait for
the standstill annunciator (
2. Press the
TARE key. The Gross annunciator is
lit.
1.4.6Set Date
In front panel setup mode use the arrow keys to toggle
DATE. Press DOWN or ENTER to enter the date in the
to
format configured for the indicator. See Figure 1-2 5.
1.4.7Set Time
In front panel setup mode use the arrow keys to toggle
TIME. Press DOWN or ENTER to enter the time in
to
24-hour format, then press the
Figure 1-2 5.
).
ENTER key. See
2. Press the
ZERO key. The center of zero ()
annunciator lights to indicate the scale is
zeroed.
1.4.4Acquire Tare
1. Place container on scale and wait for the
standstill annunciator (
2. Press the
TARE key to acquire the tare weight
).
of the container. Net weight is displayed and
net annunciator is lit.
4420HE Installation Manual
Page 9
SETPNT
number
V ALUE
number
BNDVAL
number
HYSTER
OFF
ON
ENABLE
SETPT2
Sub Menu – Press and hold UNITS key for three seconds
SETPT1
Same as SETPT 1
T/DATE
DATE
010104
TIME
0000
NOTE: Only Available when ACCESS = ON
See Figure 3-11 on page 23 and Table 3-7
on page 24 for more information.
NOTE: The indicator will begin
incrementing time at power up.
Figure 1-2. Front Panel Setpoint Setup
1.4.8Display or Change Setpoint Value
To display a setpoint value, enter front panel setup
mode. Press
LEFT/RIGHT keys toggle through both setpoints if
operator accessible. Press
ENABLE. Use the LEFT/RIGHT keys to toggle to VALUE.
Press
DOWN or ENTER to display SETPT1. The
DOWN or ENTER to display
DOWN or ENTER to view the value. See
Figure 1-2.
NOTE: Setpoint Value, Band Value and Hysteresis can
be accessible from the front panel in the weigh mode.
To change the setpoint value, use the
UP/DOWN keys to
increment/decrement the decimal value of the flashing
digit. Press
LEFT/RIGHT keys adjust the decimal point placement.
Press the
ENTER to move to the decimal point entry.
ENTER key to accept the displayed value and
return to the next value or setpoint number prompt.
Press the
UP key once more to exit. See Figure 1-2.
UP key until SETPNT is displaye d. Press the
1.4.9Turn Setpoint On or Off
To turn a setpoint on or off at the front panel, enter
front panel setup mode. Press
display
SETPT1.The LEFT/RIGHT keys toggle through
each setpoint that is operator accessible. Press
ENTER and ENABLE is displayed. Press RIGHT or LEFT to
turn the setpoint
SETPNT is displayed. Press UP once more to exit.
1.4.10 Print TIcket
ON or OFF. Press the UP key until
DOWN or ENTER again to
DOWN or
1. Wait for standstill annunciator ().
2. Press the
PRINT key to send data to the serial
port.
420HE Installation Manual - Introduction5
Page 10
2.0Installation
CAUTION
Power Cord Communications Access
Load Cell
Cable
Bottom View
Front of Indicator
This section describes procedures for connecting load
cells, digital inputs, and serial communications cables
to the
420HE indicator. Instructions for field
installation of the analog output option and
replacement of the CPU board are included, along with
assembly drawings and parts lists for the service
technician.
•Use a wrist strap to ground yourself and protect
components from electrostatic discharge (ESD)
when working inside the indicator enclosure.
•This unit uses line fusing which could create an
electric shock hazard.
inside the indicator must be performed by
qualified service personnel only.
•The supply cord serves as the main power
disconnect for
supplying the indicator must be installed near the
unit and be easily accessible
Procedures requiring work
the
420HE. The power outlet
2.1Unpacking and Assembly
Immediately after unpacking, visually inspect the
420HE to ensure all components are included and
undamaged. The shipping carton should contain the
indicator, this manual, and a parts kit. If any parts were
damaged in shipment, notify Rice Lake Weighing
Systems and the shipper immediately.
The parts kit (PN 87973) contains the items listed
low:
be
•Two, six-position screw terminals (PN 70599) for
connectors J4 & J1, two, three-position screw
terminals (PN 71125) for connectors J2 and J3,
and one, four-position screw terminal (PN 71126)
for connector J6 (see figure 2-3).
•Three reducing glands (PN 15664).
•One capacity label (PN 42350).
•Three each of grounding clamps (PN 53075),
ext
ernal tooth lock washers (PN 15134), and kep
nuts (PN 14626) for cable shield grounding
against the enclosure.
•Three reducing glands (PN 15664) used in cord
grips for
cable size less that 1/4 in.
2.3Cable Connections
The 420HE provides four cord grips for cabling into the
indicator: one for the power cord, three to
accommodate load cell, communications, digital
inputs, and analog output cables. Two of the three free
cord grips come with a plug installed to prevent
moisture from entering the enclosure. Depending on
your application, remove the plug from any cord grip
that will be used and install cables as required.
Figure 2-1 shows the recommended assignments for
420HE cord grips.
the
Figure 2-1. Recommended Cord Grip Assignments
2.2Enclosure Disassembly
The indicator enclosure must be opened to connect
cables for load cells, communications, digital inputs,
and analog output.
Ensure power to the indicator is disconnected, then
place the
draw latches, located at the two front corners of the
indicator. See Figure 2-4 9.
6420HE Installation Manual
indicator on an antistatic work mat. Unhook
Page 11
2.3.1Cable Grounding
Cord grip
Insulated cable
Foil (silver side out)
Grounding clamp
Shield wir e (cut)
Length of foil before folding
back on cable insulation
Cut insulation here
for foil-shielded cables
Braid
Cut insulation here
for braided cables
NOTE: Install lockwashers
first, against backplate,
under grounding clamp
C7
RESET
R2
C15
C20
C19
R5
MECCA
C3
+5A V
R1
C13
R16
LED2
GND
GD1
C1
F1
DI 2
DI 1
DFB2
TR1
TVS2
TVS3
TVS6
C33
C31
DO2
DO1
C10
C9
+5V
G2E
R25
C30
VR3
R6
C8
U7
C5
C6
U8
R15
U1
LED1
EDP/
RS-232
JP2
C65
U3
SW1
SETUP
C32
C2
XT1
DFB1
TR2
TVS1
TVS5 TVS4
+3. 3
R7
R4
C16
C4
DIGIN
1
J1
LOAD CELL
U2
D1
U19
U6
U9
SERIAL
1
9
11
2
8
1
1
Gn d
20mA+
Gnd
TxD
Gnd
Gn d
DI 2
EXC-
19
20
E XC+
SEN-
SEN+
SIG-
1
5
1
1
1
20mA-
RxD
RxD
TxD
DI 1
SIG+
Micr opr ocesso r
DISPLA Y
DRIVERS
KEYPAD
CONNECTOR
ANALOG
OUTPUT
OPTION CARD
REMOTE
SETUP
SWITCH
DC INPUT
R9
R10
R11
R12
ANA
ME M
AD
HB
J9
J10
U4
OFF TEST
A/D CONVERTER
U10
U11
J2 J3 J4
J7
J8
J11
J12
JP1
J1
4
3
2
1
JP2
POS 1 POS 2
JP 1
POS 1
POS 2
DIGOUT
1
+5V
DO2
Gnd
DO1
J6
R46
R47
U14
JMP3
(Factory Only)
ON
OF F
KEYPAD
CONNECTOR
HE_J2
1
2
B1
+
Except for the power cord, all cables routed through the
cord grips should be grounded against the CPU
mounting plate. Do the following to ground shielded
cables:
•Use the lockwashers, clamps, and kep nuts
provided in the parts kit to install grounding
clamps on the enclosure studs adjacent to cord
grips. Install grounding clamps only for cord grips
that will be used; do not tighten nuts.
•Route cables through cord grips and grounding
clamps to determine cable lengths required to
reach cable connectors. Mark cables to remove
insulation and shield as described below:
•For cables with foil shielding, strip insulation and
f
oil from the cable half an inch (15 mm) past the
grounding clamp (see Figure 2-2). Fold the foil
shield back on the cable where the cable passes
through the clamp. Ensure silver (conductive) side
of foil is turned outward for contact with the
grounding clamp.
•For cables with braided shielding, strip cable
in
sulation and braided shield from a point just
past the grounding clamp. Strip another half inch
(15 mm) of insulation only to expose the braid
where the cable passes through the clamp (see
Figure 2-2).
•For load cell cables, cut the shield wire just past
the
grounding clamp. Shield wire function is
provided by contact between the cable shield and
the grounding clamp.
•Route stripped cables through cord grips and
cla
mps. Ensure shields contact grounding clamps
as shown in Figure 2-2. Tighten grounding clamp
nuts.
•Finish installation using cable mounts and ties to
secur
e cables inside of indicator enclosure.
Figure 2-2. Grounding Clamp Attachment for Foil-Shielded
and Braided Cabling
Figure 2-3. 420HE CPU and Power Supply Board with Analog Output Option Card
420HE Installation Manual - Installation7
Page 12
2.3.2Load Cells
Note
Using one of the 6-position connectors, provided in the
parts kit, wire the load cell cable from the load cell or
junction box to connector J1 on the CPU board (See
Figure 2-3 7). If using six-wire load cell cable (with
sense wires), remove jumpers JP1 and JP2 before
reinstalling co
four-wire installation, leave jumpers
nnector J1 (see Figure 2-3). For
JP1 and JP2 on.
When connections are complete, reinstall connector J1
onto the header so that it snaps securely into place. Use
two cable ties to secure the load cell cable to the inside
of the enclosure.
J1 PinFunction
1
2
3
4
5
6
+SIG
–SIG
+SENSE
–SENSE
+EXC
–EXC
Table 2-1. J1 Pin Assignments
•Use grounding procedures described in
Section 2.3.1 on page 7
•For 6-wire connections, remove jumpers JP1 and
JP2
•For 4-wire connections, leave jumpers JP1 and
JP2 on
2.3.3Serial Communications
Using one of the six-position connectors, provided in
the parts kit, wire the serial communications cables to
J4. Connector J3 provides connections for the EDP/
RS-232 port. Connect communications cables to
connectors J3 and J4 as shown in Table 2-2.
Once cables are attached, reconnec
t J3 and J4 to the
headers on the board (see Figure 2-3). Use cable ties to
secure serial cables to the inside of the enclosure.
The EDP port supports full duplex RS-232
communications only; the
serial port provides either
active 20 mA output or full duplex RS-232. Both ports
are configured using the SERIAL menu. See
Section 3.0 on page 13 for configuration information.
PortConnector PinLabel
1
EDP/RS-232J3
TxD
2
RxD
3
Gnd
PortConnector PinLabel
Serial PortJ4
1
TxD
2
RxD
3
Gnd
4
20mA+
5
20mA–
6
Gnd
Table 2-2. J3 and J4 Pin Assignments
2.3.4Digital I/O
Digital inputs can be set to provide several indicator
functions, including all keypad func tions. The inputs
are active (on) with low voltage (0 VDC) and can be
driven by TTL or 5V logic without additional
hardware. Use the DIG IN menu to configure the
digital inputs. LED’s on the CPU board light when
digital inputs are active.
Digital outputs are typically used to
control relays that
drive other equipment. Outputs are designed to sink not
source, switching current. Each output is a normally
open connector circuit, capable of sinking 250 mA
when active. Digital outputs are wired to switch relays
when the digital output is active (low, 0 VDC) with
reference to 5 VDC supply. LEDs on the CPU board
light when the digital outputs are active.
PortConnector PinLabel
Digital InputJ2
Digital
Output
J6
1DI 1
2DI 2
3Gnd
1Gnd
2DO 1
3DO 2
4+5V
Table 2-3. J2 and J6 Pin Assignments
2.3.5Analog Output
If the optional analog output module is installed, attach
the output cable to connector J1 on the analog output
board. Table 2-4 on page 9 lists the analog output pin
assignments.
Use the ALGOUT menu to configure and calibrate
the
analog output module when cabling is complete. See
Section 2.4 for information about
installing the analog
output module.
Table 2-2. J3 and J4 Pin Assignments
8420HE Installation Manual
Page 13
PinSignal
Draw
Latches
NTEP
Approved Seal
Top of
Indicator
1+ Current Out
2– Current Out
3+ Voltage Out
4– Voltage Out
Table 2-4. Analog Output Module Pin Assignment
2.4Analog Output Module Installation
To install or replace the analog output module (PN
85659), follow the steps listed in Section 2.2 on page 6
for opening the
420HE enclosure.
Mount the analog output module on its standoffs in the
location shown in Figure 2-3 7 and plug the module
input into connector J9 on the
420HE board. Connect
output cable to the analog output module as shown in
Table 2-4, then reassemble the enclosure (Section 2.5).
See Figure 7.8 46 for analog output calibration
procedures.
2.5Enclosure Reassembly
Once cabling is complete, close front cover and hook
draw latches. See Figure 2-4
below.
2.6Board Removal
If you must remove the 420HE CPU board, use the
following procedure:
mmunications), J6 (digital outputs), HE_J2
(display) and J10 & J11 (keypad ribbon
cables). If an analog output board is installed,
disconnect the analog output cable. See
Figure 2-3 7 for connector locations.
5. Remove the five screws from the CPU board,
then lift t
To replace the CPU board, reverse the above
procedure. Be sure to reinstall cable ties to secure all
ca
bles inside the indicator enclosure.
he board out of the enclosure.
Figure 2-4. 420HE Draw Latches and NTEP Seal
420HE Installation Manual - Installation9
Page 14
2.7Replacement Parts
Table 2-5 lists replacement parts for the 420HE, including all parts referenced in Figures 2-5 and 2-6.
Screws, 32NC x 5/16 (6)See Figure 2-5 11
Enclosure (1)
Lock nut, hex 32NC
Power supply bracket (1)
Power supply, 12V board (1)
Screws, 40NC x 1/4 (4)
Fuse cover, 5 x 20mm (1)
Standoffs, female - female (6)
LED display board, 2 in. high (1)
Screws, 32NC x 1/4 (11)
Screws, 32NF x 3/8 (10)
Panel assembly, mounting (1)
CPU board (1)
Cable grips, 8 NPT (3)
Lock nut, 8 NPT (3)
Power cord, 120 VAC (1)See Figure 2-6 12
Switch assembly, 6 pushbutton (1)See Figure 2-5 11
Filter lens (1)
Switch cover, SRVR NEMA 4X (6)
Cable assemly (1)See Figure 2-6 12
Cable tie mounts, 3/4 in. (8)
Switch cable assembly (1)
Ribbon cable, 17 in, (1)
Earth ground label (1)
Post only, slotted black (2)
Overlay panel (1)
kep nuts, 32NC hex (1)
Lock washer, no. 8, type A (1)
Cable ties, nylon, 3 in. (10)
54224
30911
85555
15664
87972
Fuse, 4 Amp, 250V, 5x20mm (1)
Mounting Foot Kit (1)
Annunciator Labels (2)
Cord grip reducing glands, less than 1/4 in. cable size (3)
Operation manual (1)
10420HE Installation Manual
Table 2-5. Replacement Parts
Page 15
To Power Supply
From Power Supply
From Power Supply
1
2
3
4
5
6
7
8
9
10
11
12
13
15
18
19
20
16
Figure 2-5. 420HE Assembly Drawing
420HE Installation Manual - Installation11
Page 16
Grounding Detail
Ground Wire From
Power Cord (17)
Ground Screw In
Bottom Panel (12)
2X Cable Tie Wires
Using 2 Holes Provided In Bracket
Wire Tie
Squares
29
30
28
22
21
27
26
31
17
24
23
12420HE Installation Manual
Figure 2-6. 420HE Assembly Drawing
Page 17
3.0Configuration
T o configure the 420HE indicator , the indicator must be
placed in setup mode. The setup switch is accessed by
opening the enclosure and pressing the setup switch.
When the indicator is placed in setup mode, the word
CONFIG is shown on the display. The CONFIG menu is
the first of ten main menus used to configure the
indicator. Detailed descriptions of these menus are
given in Section 3.2 on page 15. When configuration is
complete, return to the CONF
IG menu and press the
(ZERO) key to exit setup mode.
3.1Configuration Methods
The 420HE indicator can be configured by using the
front panel keys to navigate through a series of
configuration menus or by sending commands or
configuration data to the EDP port. Configuration
using the menus is described in Section 3.1.3 on
page 14.
Configuration using the EDP port can be accomplished
ing either the EDP command set described in
us
Section 5.0 or the
3.1.1Revolution Configuration
The Revolution configuration utility provides the
preferred method for configuring the
Revolution runs on a personal computer to set
configuration parameters for the indicator. When
Revolution configuration is complete, configuration
data is downloaded to the indicator.
Revolution® software.
420HE indicator.
To use
Revolution, do the following:
1. Install the
Revolution module on an
IBM-compatible personal computer running
Windows
®
98 or later. Minimum system
requirements are 4MB of extended memory
and at least 5MB of available hard disk space.
2. With both indicator and PC powered off,
connect
the PC serial port to the indicator EDP
port.
3. Power up the PC and the indicator. Use the
setup switch
to place the indicator in setup
mode.
4. Start the
Figure 3-1 shows an example of one of the
Revolution program.
Revolution
configuration displays.
Revolution provides online help for each of its
configuration displays. Parameter descriptions
provided in this manual for front panel configuration
can also be used when configuring the indicator using
Revolution: the interface is different, but the
parameters set are the same.
3.1.2EDP Command Configuration
The EDP command set can be used to configure the
420HE indicator using a personal computer, terminal,
or remote keyboard. Like
Revolution, EDP command
configuration sends commands to the indicator EDP
port; unlike
Revolution, EDP commands can be sent
using any external device capable of sending ASCII
characters over a serial connection.
EDP commands duplicate the fu
nctions available using
the indicator front panel and provide some functions
not otherwise available. EDP commands can be used to
simulate pressing front panel keys, to configure the
indicator, or to dump lists of parameter settings. See
Section 5.0 on page 29 for more information about
using the EDP command set.
supports both uploading and downloading
of indicator configuration data. This capability allows
configuration data to be retrieved from one indicator,
edited, then downloaded to another.
420HE Installation Manual - Configuration13
Page 18
3.1.3Front Panel Configuration
Move UP/
Increrement
Value
ENTER
value
Move LEFT/
Previous
Move RIGHT/
Next
Move DOWN/
Decrement
Value
1st Level
Parameter
Default value
Value
When moving thr ough values below the first menu level, press to r etur n to the level
above. Press or to move to the next parameter on the level above
1st Level
Parameter
2
nd
Level
Parameter
2
nd
Level
Parameter
Value
Value
The 420HE indicator can be configured using a series of menus accessed through the indicator front panel when the
indicator is in setup mode. Table 3-1 summarizes the functions of each of the main menus.
MenuMenu Function
CONFIGConfigurationConfigure grads, zero tracking, zero range, motion ban
and digital filtering parameters.
FORMATFormatSet format of primary and secondary units, display rate.
CALIBRCalibrationCalibrate indicator. See Section 4.0 on page 27 for calibration procedures.
SERIALSerialConfigure EDP and printer serial ports.
PROGRMProgramSet power-up mode, regulatory mode,
and consecutive number values.
PFORMTPrint FormatSet print format used for gross and net tickets. See Section 6.0 on page 35 for more
information.
SETPNTSetpointConfigure Setpoints and digital outputs.
DIG INDigital InputAssign digital input functions.
ALGOUTAnalog OutputConfigure analog output module. Used only if
analog output option is installed.
VERSVersionDisplay installed software version number.
Table 3-1. 420HE Menu Summary
d, overload, tare function, sample rate,
Figure 3-2. Front Panel Key Functions in Setup Mode
Four front panel keys are used as directional keys to navigate thro ugh the menus in setup mode (see Figu re 3-2).
UNITS ( ) and PRINT ( ) keys scroll left and right (horizontally) on the same menu level; ZERO ( ) and
The
GROSS/NET ( ) move up and down (vertically) to different menu levels. The TAR E key ( ) serves as an Enter ke y
for selecting parameter values within the me
nus. A label above each of these keys identifies the direction provided
by the key when navigating through the setup menus.
14420HE Installation Manual
Figure 3-3. Setup Mode Menu Navigation
Page 19
To select a parameter, press or to scroll left or
When editing numeric values, press or to change the
digit selected. Press or to increment or decrement the
value of the selected digit.
Press to save the value entered and return to the level above.
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
GRADS
10000
0
number
ZTRKBN ZRANGE
1.900000
MOTBAN
FS+2%
FS+9D
FS+1D
FS
OVRLOA
1
4
2
8
DIGFL1
32
16
64
number
1
4
2
8
DIGFL2
32
16
64
1
4
2
8
DIGFL3
32
16
64
BOTH
PBTARE
NOT ARE
KEYED
T AREFN
ALGOUT DIG IN SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
8OUT
32OUT
16OUT
64OUT
DFSENS DFTHRH
2OUT
128OUT
4OUT
2DD
NONE
5DD
20DD
10DD
50DD
200DD
100DD
250DD
15HZ
60HZ
30HZ
7.5HZ
SMPRAT
VERS
number
1
number
right until the desired menu group appears on the
displa
y, then press
to move down to the submenu or
parameter you want. When moving through the menu
parameters, the default or pre
viously selected value
appears first on the display.
T o change a parameter value, scroll left or right to view
the values
appears on the display, press
for that parameter. When the desired value
to select the value and
move back up one level. To edit numerical values, use
e navigation keys to select the digit and to increment
th
or decrement the value.
Figure 3-4. Editing Procedure for Numeric Values
3.2Menu Structures and Parameter Descriptions
The following sections provide graphic representations of the 420HE menu structures. In the actual menu structure,
the settings you choose under each parameter are arranged horizontally. To save page space, menu choices are
shown in vertical columns. The factory default setting appears at the top of each column in bold type.
Most menu diagrams are accompanied by a table that describes all parameters
with that menu. Default parameter values are shown in bold type.
3.2.1Configuration Menu
and parameter values associated
Figure 3-5. Configuration Menu
420HE Installation Manual - Configuration15
Page 20
CONFIG Menu
ParameterChoices
Level 2 submenus
GRADS10000
number
ZTRKBND0
number
ZRANGE1.900000
number
MOTBAND1
number
OVRLOAFS+2%
FS+1D
FS+9D
FS
SMPRAT15HZ
30HZ
60HZ
7.5HZ
DIGFL1
DIGFL2
DIGFL3
2
4
8
16
32
64
1
DFSENS8OUT
16OUT
32OUT
64OUT
128OUT
2OUT
4OUT
Description
Graduations. Specifies the number of full scale graduations. The value entered must be in
the range 1–100 000 and should be consistent with legal requirements and environmental
limits on system resolution.
To calculate GRADS, use the formula, GRADS = Capacity / Display Divisions.
Display divisions for primary and secondary units are specified on the FORMAT menu.
Automatically zeroes the scale when within the range specified, as long as the input is
within the ZRANGE and scale is at standstill. Specify the zero tracking band in ± display
divisions. Maximum legal value varies depending on local regulations.
NOTE: For scales using linear calibration, do not set the zero tracking band to a value
greater than that specified for the first linearization point.
Selects the range within which the scale can be zeroed. The 1.900000 default value is ±
1.9% around the calibrated zero point, for a total range of 3.8%. Indicator must be at
standstill to zero the scale. Use the default value for legal-for-trade applications.
Sets the level, in display divisions, at which scale motion is detected. If motion is not
detected for 1 second or more, the standstill symbol lights. Some operations, including
print, tare, and zero, require the scale to be at standstill. Maximum legal value varies
depending on local regulations.
If this parameter is set to 0, the standstill annunciator will be set continuously on, and
operations including zero, print, and tare will be performed regardless of scale motion. If 0
is selected, ZTRKBND must also be set to 0.
Overload. Determines the point at which the display blanks and an out-of-range error
message is displayed. Maximum legal value varies depending on local regulations.
Sample rate. Selects measurement rate, in samples per second, of the analog-to-digital
converter. Lower sample rate values provide greater signal noise immunity.
Digital filtering. Selects the digital filtering rate used to reduce the effects of mechanical
vibration from the immediate area of the scale.
Choices indicate the number of A/D conversions that are averaged to obtain the
displayed reading. A higher number gives a more accurate display by minimizing the
effect of a few noisy readings, but slows down the settling rate of the indicator. See
Section 7.7 on page 45 for more information on digital filtering.
Digital filter cutout sensitivity. Specifies the number of consecutive readings that must fall
outside the filter threshold (DFTHRH parameter) before digital filtering is suspended. If
NONE is selected, the filter is always enabled.
Table 3-2. Configuration Menu Parameters
16420HE Installation Manual
Page 21
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
DSPDIV MULT UNITS DECPNT
0.453592
5D
2D
1D
number
PRIMAR SECNDR
6SEC
4SEC
3SEC
2.5SEC
2SEC
1.5SEC
750MS
500MS
250MS
8SEC
DSPRAT
DSPDIV UNITS DECPNT
KG 888880
888888
1D
5D
2D
LB
88888. 8
8888.88
888.888
88.8888
8.88888
888880
888888
88888.8
8888.88
888.888
88.8888
8.88888
T
TN
NONE
TN
KG
T
LB
ALGOUT DIGI N SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
1SEC
VERS
OZ
OZ
G
G
NONE
Only used if
UNITS =NONE
CONFIG Menu
ParameterChoices
DFTHRHNONE
2DD
5DD
10DD
20DD
50DD
100DD
200DD
250DD
TAREFN
Description
Digital filter cutout threshold. Spe
cifies the filter threshold, in display divisions. When a
specified number of consecutive scale readings (DFSENS parameter) fall outside of this
threshold, digital filtering is suspended. If NONE is selected, the filter is always enabled.
Tare function. Enables or disables push-button and ke
yed tares. Possible values are:
3.2.2Format Menu
BOTH
NOTARE
PBTARE
KEYED
BOTH:Both push-button and keyed tares are enabled
NOTARE:No tare allowed (gr
Table 3-2. Configuration Menu Parameters (Continued)
FORMAT Menu
ParameterChoicesDescription
Level 2 submenus
PRIMARDECPNT
DSPDIV
UNITS
SECNDRDECPNT
DSPDIV
UNITS
MULT
Figure 3-6. Format Menu
Specifies the decimal position, display divisions, and
Level 3 submenu parameter descriptions.
Specifies the decimal position, display divisions, units, and conversion multiplier used for the
secondary units. See Level 3 submenu parameter descriptions.
Table 3-3. Format Menu Parameters
units used for the primary units. See
420HE Installation Manual - Configuration17
Page 22
FORMAT Menu
ParameterChoicesDescription
DSPRAT250MS
500MS
750MS
1SEC
1.5SEC
2SEC
2.5SEC
3SEC
4SEC
6SEC
8SEC
Level 3 submenus
Primary Units (PRIMAR Parameter)
DECPNT888888
888880
8.88888
88.8888
888.888
8888.88
88888.8
DSPDIV1D
2D
5D
UNITSLB
KG
OZ
TN
T
G
NONE
Secondary Units (SECNDR Parameter)
DECPNT88888.8
888888
888880
8.88888
88.8888
888.888
8888.88
DSPDIV5D
1D
2D
UNITS KG
OZ
TN
T
G
NONE
LB
MULT0.453592
Enter other
choices via
keyboard
Display rate. Sets the update rate for displayed values. Values are in milliseconds (MS) or
seconds (SEC).
Decimal point location. Specifies the location of the decimal point or dummy zeroes in the
primary unit display. Value should be consistent with local legal requirements.
Display divisions. Selects the minimum division size for the primary units displayed weight.
Specifies primary units for displayed and printed weight. Values are: LB=pound;
KG=kilogram; OZ=ounce; TN=short ton; T=metric ton; G=gram
NOTE: Indicators sold outside North America are configured with KG for both primary and
secondary units.
Decimal point location. Determines the location of the decimal point or dummy zeros in the
secondary unit display.
Display divisions. Selects the value of minimum division size of the displayed weight.
Specifies secondary units for displayed and printed weight. Values are: KG=kilogram;
OZ=ounce; TN=short ton; T=metric ton; G=gram; LB=pound.
Multiplier. Specifies the conversion factor by which the primary units are multiplied to obtain
the secondary units. The default is 0.453592, which is the conversion factor for changing
pounds to kilograms. See
NOTE: Multipliers are pre-configured within the indicator. Manual entry is only necessary
when NONE is selected under UNITS.
To toggle between primary and secondary units, press the UNITS key.
Section 7.6 on page 44 for a list of multipliers.
Table 3-3. Format Menu Parameters (Continued)
18420HE Installation Manual
Page 23
3.2.3Calibration Menu
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
WZERO WV AL WSPAN
ALGOUT DIGI N SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
See Section 4.0 on page 27 for Calibration procedures.
Figure 3-7. Calibration Menu
CALIBR Menu
ParameterChoicesDescription
Level 2 submenus
WZERO—Display and edit the zero calibration A/D count value.
DO NOT adjust this value after WSPAN has been set!
WVAL—Display and edit the test weight value.
WSPAN—Display and edit the span calibration A/D count value.
REZERO—Press Enter to remove an offset value from the zero and span calibrations.
Use this parameter only after WZERO and WSP
page 27 for more information about using this parameter.
3.2.4Serial Menu
See Section 7.3 on page 40 for information about the 420HE serial data format.
Table 3-4. Calibration Menu Parameters
Figure 3-8. Serial Menu
AN have been set. See Section 4.1 on
420HE Installation Manual - Configuration19
Page 24
SERIAL Menu
ParameterChoicesDescription
Level 2 submenus
EDPBAUD
BITS
TERMIN
EOLDLY
ECHO
PRINTBAUD
BITS
TERMIN
EOLDLY
ECHO
STREAMOFF
EDP
PRN
STRRTEINDUST
LFT
PRNDESEDP
PRN
PRNMSGOFF
ON
Level 3 SubmenusEDP Port and Printer Port
BAUD9600
19200
38400
300
600
1200
2400
4800
BITS8NONE
7EVEN
7ODD
TERMINCR/LF
CR
EOLDLY000
number
Specifies settings for baud rate, data bits, termination
used by the EDP port.
Specifies settings for baud rate, data bits, termination
used by the printer port.
Selects the serial port used for continuous transmission. See Section 7.3 on page 40 for
information about the
Specifies stream rate. Stream rate can be
Print destination. Selects the port for data transmis
KPRINT EDP command is sent.
Print message. Default will be off. Whenever the pr
word PRINT is momentarily put on the remote display.
Baud rate. Selects the transmission speed for the EDP
Selects number of data bits and parity of data tran
Termination character. Selects termination character
End-of-line delay. Sets the delay period, in 0.1-second intervals, from when a formatted line is
terminated to
range 0-255, in tenths of a second (10 = 1 second).
the beginning of the next formatted serial output. Value specified must be in the
420HE continuous data format.
set to industrial or legal for trade.
characters, end-of-line delay and echo
characters, end-of-line delay and echo
sion when the PRINT key is pressed or the
int key is pressed and data is sent out, the
or printer port.
smitted from the EDP or printer port.
for data sent from the EDP or printer port.
NOTE: An
receiving buffer is empty before another string is transmitted
ECHOOFF
ON
20420HE Installation Manual
This command enables or disables echoing of the se
EOL may be required for continuous transmission at slower baud rates to ensure the
rial commands sent to the indicator.
Table 3-5. Serial Menu Parameters
Page 25
3.2.5Program Menu
XXXXXXX XXXXXXX
PWRUPM
GO
OIML
REGULA
000000
number
CONSNU
DELAY
SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
000000
number
CONSTU
NTEP
CANADA
1
UID
VERS DIGIN ALGOUT
DA TFMT
MMDDYY
DA TE
DDMMYY
YYMMDD
YYDDMM
DA TSEP
SLASH
DASH
SEMI
TIMFMT
12HOUR
TIME
24HOUR
TIMSEP
COLON
COMA
NONE
Figure 3-9. Program Menu
PROGRM Menu
ParameterChoicesDescription
Level 2 submenus
PWRUPMGO
DELAY
REGULANTEP
OIML
CANADA
NONE
Power up mode. In GO mode, the indicator goes into ope
up display test.
In DELAY mode, the indica
tor performs a power up display test, then enters a 30-second
warm up period. If no motion is detected during the warm up period, the indicator becomes
operational when the warm up period ends; if motion is detected, the delay timer is reset and
the warm up period repeated.
Regulatory mode. Specifies the regulatory agency having
OIML, NTEP, and CANADA modes allow a tare to be acquir
NONE allows tares to be acquired at any weight value.
OIML, NTEP, and CANADA modes allow a tar
load. NONE allows tares to be cleared at any weight value.
NTEP and OIML modes allow a new tar
e to be acquired even if a tare is already present. In
CANADA mode, the previous tare must be cleared before a new tare can be acquired.
ration immediately after a brief power
jurisdiction over the scale site.
ed at any weight greater than zero.
e to be cleared only if the gross weight is at no
NONE, NTEP and CANADA modes allow the scale to be zer
long as the current weight is within the specified ZRANGE. In OIML mode, the scale must be in
gross mode before it can be zeroed; pressing the ZERO key in net mode clears the tare.
UID1Specifies the unit identification number. Value spec
digits.
DATEDATFMT
Allows selection of date format and date separator
DATSEP
TIMETIMFMT
Allows selection of time format and separator
. See level three parameter for descriptions.
TIMSEP
CONSNU000000
number
Consecutive numbering. Allows sequential number
number value is incremented following each print operation.
The initial value of this parameter is set to the
CONSTU000000
number
parameter. Changing either CONSTU or CONSNU immediately resets the consecutive number
used for printing.
Consecutive number start up value
used when the indicator is powered on.
. Specifies the initial consecutive number (CONSNU) value
Level 3 submenus
Table 3-6. Program Menu Parameters
420HE Installation Manual - Configuration21
oed in either gross or net mode as
ified can be any numeric value, up to six
. See Level three parameter for descriptions.
ing for print operations. The consecutive
start up value specified on the CONSTU
Page 26
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
GFMT
Display first 6
characters of format
Same as GFMT
NFMT
ALGOUT DIGIN SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
Display and edit
active character and
ASCII value
Delete active
character
Scroll left in formatting string
Increment ASCII value of active character Decrement ASCII value of active character
Press to insert a space
before the active character
VERS
Scroll right in formatting string
PROGRM Menu
ParameterChoicesDescription
DATFMTMMDDYY
Specifies the format used to display or print the date.
DDMMYY
YYMMDD
DATSEPSLASH
Specifies the date separator character.
DASH
SEMI
TIMFMT24HOUR
Specifies the format used to display or print the time.
12HOUR
TIMSEPCOLAN
Specifies the time separator character.
COMMA
Table 3-6. Program Menu Parameters (Continued)
3.2.6Print Format Menu
See Section 6.0 for information about custom print formatting.
22420HE Installation Manual
Figure 3-10. Print Format Menu
Page 27
3.2.7Setpoint Menu
GROSS
NET
SETPT1
Same as SETPT1
XXXXXXX XXXXXXX
XXXXXXX XXXXXXX
VERS ALGOUT DIG IN
PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
XXXXXXX
SETPNT
KIND
number
V ALUE
HIGHER
LOWER
TRIP
number
BNDVAL
INBAND
OUTBAND
number
HYSTER
OFF
ON
ENABLE
OFF
ON
ACCESS
If TRIP = HIGHER/
LOWER
SETPT2
Figure 3-11. Setpoint Menu
SETPNT Menu
ParameterChoicesDescription
Level 2 submenus
SETPT1
SETPT2
ENABLE
KIND
Specify settings for setpoint enable, kind, weight value,
setpoint
trip, and band value used by the
VALUE
TRIP
BNDVAL
Level 3 submenus
ENABLEOFF
Turn setpoint ON or OFF.
ON
KINDGROSS
NET
Specifies the setpoint kind and determines wheth
weight.
er function is based on GROSS or NET
GROSS or NET setpoint kinds can be used.
VALUEnumberDisplay and edit the setpoint value
TRIPHIGHER
LOWER
INBAND
OUTBND
Trips the setpoint when the weight
is higher or lower than the setpoint value, or is within or
outside of the band value. LOWER means the output is active until you reach weight. If trip is
HIGHER, the output is active when the setpoint is met or exceeded. INBAND means the
output is active if the weight is within the band value. If trip is OUTBND, the output is active
when the weight is outside of the band value.
BNDVALnumberThe band value for either INBAND or OUTBND trip setpoints. BNDVAL is ignored unless trip is
HYSTERnumberSpecifies a band around the setpoint value that must be
set to IN
BAND or OUTBND.
exceeded before the setpoint, once
off, can trip on. If TRIP = HiGHER or LOWER.
ACCESSOFF
ON
Front panel access to setpoints. Specify OFF if setpoints will not be used. ON enables
operato
r to turn setpoints on/off, change value, or change BANDVAL via front panel entry
during weigh mode.
Table 3-7. Setpoint Menu Parameters
420HE Installation Manual - Configuration23
Page 28
3.2.8Digital Input Menu
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
DIGIN1
OFF
DIGIN2
ZERO
T ARE
NT/GRS
UNITS
DSPTAR
PRINT
CLRCN
OFF
ZERO
T ARE
NT/GRS
UNITS
DSPTAR
PRINT
CLRCN
ALGOUT DIGI N SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
HOLD HOLD
KBDLOC KBDLOC
VERS
NEWID NEWID
Figure 3-12. Digital Input Menu
DIG IN Menu
ParameterChoicesDescription
Level 2 submenus
DIGIN1
DIGIN2
OFF
ZERO
TAR E
NT/GRS
UNITS
DSPTAR
PRINT
CLRCN
KBDLOC
HOLD
NEWID
Specifies the function activated by digital inputs 1 and
• ZERO, NT/GRS (net/gross mode toggle), TARE,
functions as the front panel keys.
• DSPTAR displays the current tare value.
• CLRCN resets the consecutive number to the value specified on th
(PROGRM menu).
• KBDLOC disables the keypad while the digital input is held low.
• HOLD holds the current display. Releasing this i
• NEWID enters the ID number. This input will put indicator into numeric entry mode to enter
an ID.
Table 3-8. Digital Input Menu Parameters
24420HE Installation Manual
2.
UNITS, and PRINT provide the same
e CONSTU parameter
nput clears the running average filter.
Page 29
3.2.9Analog Output Menu
XXXXXXX XXXXXXX ALGOUT DIGIN SETPNT XXXXXXX PROGRM PFORMT SERIAL CALIBR XXXXXXX CONFIG FORMAT
SOURCE
GROSS
0%
20%
OFFSET
ERRACT
FULLSC
HOLD
000000
number
MIN
10000
number
MAX
TWZERO
NET
TWSPAN
ZEROSC
VERS
MINNEG
OFF
ON
MAXNEG
OFF
ON
The ALGOUT menu is used only if the analog output option is installed. If the analog output option is installed,
configure all other indicator functions and calibrate the indicator (see Section 4.0) before configuring the analog
output. See Section 7.8 on page 46 for analog output calibration procedures.
Figure 3-13. Analog Output Menu
ALG OUT Menu
ParameterChoicesDescription
Level 2 submenus
SOURCEGROSS
NET
OFFSET0%
20%
ERRACTFULLSC
HOLD
ZEROSC
MIN000000
number
MINNEGOFF
ON
MAX010000
number
MAXNEGOFF
ON
TWZERO—Tweak zero. Adjust the analog output zero calibration
TWSPAN—Tweak span. Adjust the analog outp
Specifies the source tracked by the analog output.
Zero offset. Selects whether the analog output supplies voltage (0–10 V) or curr
ent (4–20 mA)
output. Select 0% for 0–10 V output; select 20% for 4–20 mA output.
Error action. Specifies how the analog output responds to system error conditions.
Possible values are:
FULLSCSet to full value (10 V or 20 mA)
HOLD:Hold current value
ZEROSC:Set to zero value (0 V or 4 mA)
Specifies the minimum weight value tracked by the analog output. Specify a weight value (in
primary units) in the range 0–999 999.
Turn ON or OFF.
Specifies the maximum weight value tracked by the analog output. Specify a weight value (in
primary units) in the range 0–999 999.
Turn ON or OFF.
. Use a multimeter to monitor the analog
output value. Press and hold
or to adjust the output. Press to save the new value.
ut span calibration. Use a multimeter to monitor the analog
output value. Press and hold or to adjust the output. Press to save the new value.
Table 3-9. Analog Output Menu Parameters
420HE Installation Manual - Configuration25
Page 30
3.2.10Version Menu
XXXXXXX ALGOUT XXXXXXX XXXXXXX
VERS
DIGI N SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
SOFTWR
REGVER
MODEL
1.08 1.01
HE
The VERS menu is used to check the software version and reg version installed in the indicator. You can also check
the indicator model.
Figure 3-14. Version Menu
26420HE Installation Manual
Page 31
4.0Calibration
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
WZERO WV AL WSPAN
ALGOUT DIGI N SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
REZERO
VERS
The 420HE can be calibrated using the front panel, EDP commands, or the Revolution® configuration utility. Each
method consists of the following steps:
•Zero calibration
•Entering the test weight value
•Span calibration
•Optional rezero calibration for test weights using hooks or chains.
The following sections describe the
calibration procedure for each of the calibration methods.
Figure 4-1. Calibration (CALIBR) Menu
4.1Front Panel Calibration
To calibrate the indicator using the front panel, do the
following:
1. Place the indicator in setup mode (display
CONFIG) and remove all weight from the
reads
scale platform. If your test weights require
hooks or chains, place the hooks or chains on
the scale for zero calibration.
2. Press
Figure 4-1). Press to go to zero calibration
(
WZERO).
3. With
zero. The indicator displays *CAL* while
calibration is in progress. When complete, the
A/D count for the zero calibration is displayed.
DO NOT adjust this value after WSPAN has
been set! Press
calibration value and go to the next prompt
(
WVAL).
4. With
stored calibration weight. Use the procedure
shown in Figure 3-4 15 to enter the actual
value of the test weights to be used for the span
calibration. Press
value and go to span calibration (WSPAN).
5. With
the scale and press to calibrate span. The
indicator displays
progress. When complete, the A/D count for
the span clibration is displayed. Press
to store the span calibration value and go to the
ne
until the display reads CALIBR (see
WZERO displayed, press to calibrate
again to save the zero
WVAL displayed, press to show the
to store the entered WVAL
WSPAN displayed, place test weights on
*CAL* while calibration is in
xt prompt (
REZERO).
again
6. The rezero function is used to remove a
calibration of
fset when hooks or chains are
used to hang the test weights.
• If no other apparatus was used to hang the test
ghts during calibration, remove the test
wei
weights and press
to return to the CALIBR
menu.
• If hooks or chains were used during
calibration, remove these a
nd the test weights
from the scale. With all weight removed, press
to rezero the scale. This function adjusts the
zero and span calibration values. The indicator
displays
*CAL* while the zero and span
calibrations are adjusted. When complete, the
adjusted A/D count for the zero calibration is
displayed. Press
to save the value, then press
to return to the CALIBR menu.
7. Press
press
until the display reads CONFIG, then
to exit setup mode.
4.2EDP Command Calibration
To calibrate the indicator using EDP commands, the
indicator EDP port must be connected to a terminal or
personal computer. See Section 2.3.3 on page 8 for
EDP port pin assignments; see Section 5.0 on page 29
for more information abou
Once the indicator is connected to
do the following:
1. Place the indicator in setu
reads
CONFIG) and remove all weight from the
scale platform. If your test weights require
hooks or chains, place the hooks or chains on
the scale for zero calibration.
2. Send the WZERO EDP command to calibrate
ro. The indicator displays
ze
calibration is in progress.
t using EDP commands.
the sending device,
p mode (display
*CAL* while
420HE Installation Manual - Calibration27
Page 32
3. Place test weights on the scale and use the
Note
Note
WVAL command to enter the test weight value
in the following format:
WVAL=nnnnnn<CR>
4. Send the WSPAN EDP command to calibrate
span. The indicator displays
*CAL* while
calibration is in progress.
5. To remove an offset value, clear all weight
from
the scale, including hooks or chains used
to hang test weights, then send the REZERO
EDP command. The indicator displays
*CAL*
while the zero and span calibrations are
adjusted.
6. Send the KUPARROW EDP command to exit
mode.
setup
4.3Revolution® Calibration
To calibrate the indicator using Revolution, the
indicator EDP port must be connected to a PC running
Revolution configuration utility.
the
Use the following procedure to calibrate the indicator:
1. Select
tools menu.
2.
Revolution uploads calibration data from the
indicator then presents the information in a
display like that shown in Figure 4-2.
Calibration Wizard from the Revolution
4.4More About Calibration
The following topics provide additional information
about compensating for environmental factors
(Section 4.4.1) and diagnostic information for
determining expected zero and span coefficients.
4.4.1Adjusting Final Calibration
Calibration may be affected by environmental factors
including wind, vibration, and angular loading. For
example, if the scale is calibrated with 1000 lb, a strain
test may determine that at 2000 lb the calibration is 3 lb
high. In this case, final calibration can be adjusted by
tweaking WVAL to 998.5 lb. This adjustment provides
a linear correction of 1.5 lb per 1000 lb.
To adjust the final calibration, return to the
prompt and press to show the test weight value.
Press
or to adjust calibration up or down. Press
to save the value, then press to return to the CALIBR
menu.
4.4.2A/D Counts
Table 4-1 lists the ideal A/D counts that result from
input signals of 0–3.0 mV with zero deadload. Actual
values will typical
ly be higher than the values shown in
Table 4-1 but the ideal values c an be used when
calibrating the indicator with
no attached scale.
WVAL
Figure 4-2. Revolution Calibration Display
3. Enter the Value of Test Weight to be used for span
calibration then click
OK.
4. The Zero Calibration dialog box prompts you
to remove
scale and click
If your test weights require hooks or
chains, place the hooks or chains on the scale
for zero
all weight from the scale. Clear the
OK to begin zero calibration.
calibration.
5. When zero calibration is complete, the Span
Calibration dialog box prompts you to place
test weights on the scale for span calibration.
Place tests weights on the scale then click
6. When calibration is complete, the
New Settings
OK.
fields of the Indicator Calibration display are
filled in. Click
return to the
Exit to save the new values and
Revolution main menu; to restore
the previous calibration values, click Restore
Settings
.
Input Signal (mV)Raw A/D Counts
0.0 mV/V
0.5 mV/V
1.0 mV/V
1.5 mV/V
2.0 mV/V
2.5 mV/V
3.0 mV/V
Table 4-1. Ideal A/D Raw Counts
When Raw A/D Count is displayed, the six
most significant digits appear. Scroll left or
ri
ght to see the full value.
167,840
335,613
503,377
671,143
838,908
1,100,668
1,174,446
28420HE Installation Manual
Page 33
5.0EDP Commands
The 420HE indicator can be controlled by a personal
computer or remote keyboard connected to the
indicator EDP port. Control is provided by a set of EDP
commands that can simulate front panel key press
functions, display and change setup parameters, and
perform reporting functions. The EDP port provides
the capability to print configuration data or to save that
data to an attached personal computer. This section
describes the EDP command set and procedures for
saving and transferring data using the EDP port.
5.1The EDP Command Set
The EDP command set can be divided into five groups:
key press commands, reporting commands, the
RESETCONFIGURATION special function
command, parameter setting commands, and transmit
weight data commands.
When the indicator processes an EDP command, it
sponds with the message
re
verifies that the command was received and ha s been
executed. If the command is unrecognized or cannot be
executed, the indicator responds with
The following sections list the commands and
command syntax use
5.1.1Key Press Commands
d for each of these groups.
Key press EDP commands (see Table 5-1) simulate
pressing the keys on the front panel of the indicator.
st commands can be used in both setup and
Mo
weighing mode. Several of the commands serve as
“pseudo” keys, providing functions that are not
represented by a key on the front panel.
For example, to enter a 15-pound tare weight using
EDP commands:
1. Type K1 and press
2. Type K5 and press
3. Type KTARE and press
shifts to net mode when the tare is entered.
OK. The OK response
??.
ENTER (or RETURN).
ENTER.
ENTER. The display
CommandFunction
KZEROIn weighing mode, press the ZERO key
KGROSSNETIn weighing mode, press the GROSS/
NET key
KGROSSGo to gross mode*
KNETGo to net mode*
KTAREPress the TARE key
KUNITSIn weighing mode, pr
KPRIMGo to primary units*
KSECGo to secondary units*
KPRINTIn weighing mode, pr
KLEFTARROWIn setup mode, move left in the menu
KRIGHTARROWIn setup mode, move right in the menu
KUPARROWIn setup mode, move up in the menu
KDOWNARROWIn setup mode, move down in the menu
KTIMEPress the TIME/DATE key once*
KDATEPress the TIME/DATE key twice*
KDISPTAREPress the DISPLAY TARE key*
KCLRPress the CLEAR key*
K0Press number 0 (zero)*
K1Press number 1*
K2Press number 2*
K3Press number 3*
K4Press number 4*
K5Press number 5*
K6Press number 6*
K7Press number 7*
K8Press number 8*
K9Press number 9*
KDOTPress the decimal point (.)*
KENTERPress the ENTER key
* Pseudo keys
ess the UNITS key
ess the PRINT key
Table 5-1. EDP Key Press Commands
420HE Installation Manual - EDP Commands29
Page 34
5.1.2Reporting Commands
Note
Reporting commands (see Table 5-2) send specific
information to the EDP port. These commands can be
sed in both setup mode and normal mode.
u
CommandFunction
DUMPALLList all parameter values
VERSION
PWrite current displayed weight with units
ZZWrite current weight and annunciator
SWrite one frame of stream format. See
5.1.3The RESETCONFIGURATION Command
420HE software version
fier. See Section 7.2 on page 39 for
identi
more information.
status. See Section 7.2 on page 39 for
more information.
Ta bl e 5-12 on page 33 for information
about the SX and EX commands.
Table 5-2. EDP Reporting Commands
The RESETCONFIGURATION command can be used
to restore all configuration parameters to their default
values. Before issuing this command, the indicator
must be placed in test mode (press and hold setup
switch for approximately three seconds to show TEST
menu).
This command is equivalent to
using the DEFLT
function on the TEST menu. See Section 7.9 on
page 47 for more information about test mode and
using the TEST menu.
All load cell calibration settings are lost when
the RESETCONFIGURATION command is run.
5.1.4Parameter Setting Commands
Parameter setting commands allow you to display or
change the current value for a particular configuration
parameter (Tables 5-3 through 5-11).
Current configuration para
meter settings can be
displayed in either setup mode or normal mode using
the following syntax:
command<ENTER>
Most parameter values can be changed in setup mode
only. Use the following command syntax when
changing parameter values:
command=value<ENTER>
where value is a number or a parameter value. Use no
spaces before or after the equal (=) sign. If you type an
incorrect command or value, the display reads
??.
Changes to the parameters are saved as they are entered
but typically do not take effect until you exit setup
mode.
For example, to set the motion band parameter
to 5,
type the following:
MOTBAND=5D<ENTER>
5.1.5Soft Reset
The command RS will reset the indicator without
losing configuration and calibration. It does reset
consecutive number.
EDP.BAUDEDP port baud rate300, 600, 1200, 2400, 4800, 96
EDP.BITSEDP port data bits/parity8NONE, 7EVEN, 7ODD
EDP.TERMINEDP port termination characterCR/LF, CR
EDP.EOLDLYEDP port end-of-line delay0–255 (0.1-second
EDP.ECHOEDP port echoON, OFF
PRN.BAUDPrinter port baud rate300, 600, 1200, 2400, 4800, 96
PRN.BITSPrinter port data bits/parity8NONE, 7EVEN, 7ODD
PRN.TERMINPrinter port termination characterCR/LF, CR
PRN.EOLDLYPrinter port end-of-line delay0–255 (0.1-second
PRN.ECHOPrinter port echoON, OFF
STREAMStreaming portOFF, EDP, PRN
STRRTEStream rateINDUST, LFT
PRNDESTPrint destinationEDP, PRN
PRNMSGPrint messageOFF, ON
CONSTUPConsecutive number start-up value 0–999 999
DATEFMTDate formatMMDDYY, DDMMYY, YYMMDD, YYDDMM
DATESEPDate seperatorSLASH, DASH, SEMI
TIMEFMTTime format12HOUR, 24HOUR
TIMESEPTime seperator
COLON, COMMA
Table 5-7. PROGRM EDP Commands
CommandDescriptionValues
GFMTGross demand print format
ing
str
NFMTNet demand print fo
rmat string
See Section 6.0 on page 35 for detailed information
Table 5-8. PFORMT EDP Commands
CommandDescriptionVal ues
SP1SP2
SP1.ENABLESP2.ENABLESetpoint enableOFF, ON
SP1.KINDSP2.KINDSetpoint kindGROSS, NET
SP1.VALUESP2.VALUESetpoint valuenumber
SP1.TRIPSP2.TRIPTripHigher, Lower, Inband, Outbnd
SP1.BNDVALSP2.BNDVALBand valuenumber
SP1.HYSTERSP2.HYSTERHysteresisnumber
SP1.ACCESSSP2.ACCESSSetpoint accessOFF, ON
Table 5-9. SETPNTS EDP Commands
CommandDescriptionValues
DIGIN1
DIGIN2
Digital input functionOFF, ZERO, TARE, NT/GRS, UNITS,
KBDLOC, HOLD, CLRTAR, CLRACC, ACCUM, NEWID
Table 5-10. DIG IN EDP Commands
CommandDescriptionValues
SOURCEAnalog output source GROSS, NET
OFFSETZero offset0%, 20%
ERRACTError actionFULLSC, HOLD, ZEROSC
MINMinimum value tracked0–999 999
MINNEGMinimum negativeOFF, ON
MAXMaximum value tracked0–999 999
MAXNEGMaximum negativeOFF, ON
TWZEROZero calibration0–16 383
TWSPANSpan calibration0–16 383
Table 5-11. ALGOUT EDP Commands
DSPTAR, PRINT, CLRCN,
32420HE Installation Manual
Page 37
5.1.6Normal Mode Commands
The serial transmit weight data commands (see Table 5-12) transmit data to the EDP port on demand. The SX and
EX commands are valid only in normal operating mode; all oth
er commands are valid in either setup or normal
mode.
CommandDescriptionResponse Format
UIDSet unit IDnnnnnnn
SDSet dateMMDDYY, DDMMYY, YYMMDD (enter using DATEFMT
specified)
STSet timehhmm (enter using 24-hour format)
SXStart EDP streamingOK or ??
EXStop EDP streamingOK or ??
RSReset system—
XATransmit accumulator valuennnnnn UU
XGTransmit gross weight in
XNTransmit net weight in displayed units
XTTransmit tare weight in displayed units
XG2Transmit gross weight in non-displayed units
XN2Transmit net weight in non-displayed units
XT2Transmit tare weight in non-displayed units
XEQuery system error conditionsnnnnn nnnnn
displayed units
where nn
See Section 7.1.2 on page 39 for detailed information about
the XE command response format.
nnnn is the weight value, UU is the units.
Table 5-12. Normal Mode Commands
420HE Installation Manual - EDP Commands33
Page 38
5.2Saving and Transferring Data
Connecting a personal computer to the 420HE EDP
port allows you to save indicator configuration data to
the PC or to download configuration data from the PC
to an indicator. The following sections describe the
procedures for these save and transfer operations.
5.2.1Saving Indicator Data to a Personal Computer
Configuration data can be saved to a personal computer
connected to the EDP port. The PC must be running a
communications program such as PROCOMMPLUS
Section 2.3.3 on page 8 for information about
See
serial communications wiring and EDP port pin
assignments.
When configuring the indicator, ensure that the values
set for the BAUD and BITS parameters on the SERIAL
menu match the baud rate, bits, and parity settings
configured for the serial port on the PC. Set the
PRNDEST parameter to EDP.
To save all configuration data, place the indicator in
setup mode and send the DUMPALL EDP command to
the indicator. The
420HE responds by sending all
configuration parameters to the PC as ASCII-formatted
text.
®
5.2.2Downloading Configuration Data from PC to
Indicator
Configuration data saved on a PC or floppy disk can be
downloaded from the PC to an indicator. This
procedure is useful when a number of indicators with
similar configurations are set up or when an indicator is
replaced.
To download configuration data, connect the PC to the
EDP port as described in
Section 5.2.1. Place the
indicator in setup mode and use the PC
.
communications software to send the saved
configuration data to the indicator. When transfer is
complete, calibrate the indicator as described in
Section 4.0.
NOTES:
•Calibration settings are included in the
configuration data downloaded to the indicator.
If the receiving indicator is a direct
replacement for another
420HE and the
attached scale is not changed, recalibration is
not required.
•When downloading configurations that include
changed serial communications settings, edit
the data file to place the serial communications
changes at the end of the file. Communication
between the PC and indicator will be lost once
the indicator receives settings for baud rate
(BAUD parameter) or data bits and parity
(BITS parameter) that do not match those
configured for the PC.
34420HE Installation Manual
Page 39
6.0Print Formatting
Note
The 420HE provides two print formats, GFMT and
NFMT that determine the format of the printed output
when the
PRINT key is pressed or when a KPRINT EDP
command is received. If a tare has been entered or
acquired, NFMT is used; otherwise, GFMT is used.
Each print format can be customized to include up to
0 characters of information, such as company name
30
and address, on printed tickets. You can use the
indicator front panel (PFORMT menu), EDP
commands, or the
Revolution
®
configuration utility to
customize the print formats.
Display will only show capital letters, press the
down arrow to view the ASCII character
d
ecimal value on the second menu level. Refer
to Ta bl e 7-4 on page 41 and Ta bl e 7-5 on page 42 to view
the ASCII character charts.
6.1Print Formatting Commands
Table 6-1 lists commands you can use to format the
gross, net and count print formats
in the format strings must be enclosed between < and >
delimiters. Any characters outside of the delimiters are
printed as text on the ticket. T ext characters can include
any ASCII character that can be printed by the output
device.
CommandDescription
<G>Gross weight in displayed units
<G2>Gross weight in non-displayed units
<N>Net weight in displayed units
<N2>Net weight in non-displayed units
<T>Tare weight in displayed units
<T2>Tare weight in non-displayed units
<UID>Unit ID number
<CN>Consecutive number
>New line (nn = number of termination (<CR/LF>
<NLnn
or <CR>) characters)*
>Space (nn = number of spaces)*
<SPnn
<SU>Toggle weight data format (formatted/
atted)**
unform
<TI>Time
<DA>Date
<TD>
Gross, net, and tare weights are 9 digits in length, including
sign (10 digits with decimal point), followed by a space and a
two-digit units identifier. Total field length with units identifier
is 12 (or 13) characters.
ID and consecutive number (CN) fields are 1–6 characters in
length, as required.
Time & Date
Table 6-1. Print Format Commands
. Commands included
CommandDescription
* Ifnn is not specified, 1 is assumed. Value must be inthe range 1–99.
** After receiving an SU command, the indicator sends
unformatted data until the next SU command is received.
Unformatted data omits decimal points, leading and trailing
characters.
Table 6-1. Print Format Commands
The default GFMT and NFMT print formats use only
the new line (<NL>) command and the commands for
gross, net, and tare weights in displayed units (<G>,
<N>, and <T>).
The default
420HE print formats are shown in
Table 6-2:
FormatDefault Format StringSample Output
GFMT
NFMT
NOTES:
<G> GROSS<NL>2046.81 lb GROSS
<G> GROSS<NL>
<T> TARE<NL>
<N> NET<NL>
Table 6-2. GFMT and NFMT Formats
4053.1 lb GROSS
15.6 lb TARE
4037.5 lb NET
•The <G2>, <N2>, and <T2> commands listed
in Table 6-1 print the gross, net, and tare
weights in non-displayed units—that
is, in the
units not currently displayed on the indicator.
•ID numbers included in the print format string
(<UID>
command) must be set using the UID
EDP command.Or, DIGIN must be set for
NEWID.
•The 300-character limit of each print format
string in
cludes the output field length of the
print formatting commands, not the command
length. For example, if the indicator is
configured to show a decimal point, the <G>
command generates an output field of 13
characters: the 10-character weight value
(including decimal point), one space, and a
two-digit units identifier.
•PT (preset tare) is added to the tare weight if
tare wa
s keyed in.
6.2Customizing Print Formats
The following sections describe procedures for
customizing the GFMT and NFMT formats using the
EDP port, the front panel (PFORMT menu), and the
Revolution configuration utility.
6.2.1Using the EDP Port
With a personal computer, terminal, or remote
keyboard attached to the
the EDP command set to customize the print format
strings.
420HE EDP port, you can use
420HE Installation Manual - Print Formatting35
Page 40
To view the current setting of a format string, type the
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
GFMT
Display first 6
characters of format
Same as GFMT
NFMT
ALGOUT DIGIN SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
Display and edit
active character and
ASCII value
Delete active
character
Scroll left in formatting string
Increment ASCII value of active character Decrement ASCII value of active character
Press to insert a space
before the active character
VERS
Scroll right in formatting string
Note
Note
name of the string (GFMT or NFMT) and press
ENTER.
For example, to check the current configuration of the
GFMT format, type GFMT and press
ENTER. The
indicator responds by sending the current configuration
for the gross format:
GFMT=<G> GROSS<NL>
To change the format, use the GFMT or NFMT EDP
command followed by an equals sign (=) and the
modified print format string. For example, to add the
name and address of a company to the gross format,
you could send the following EDP command:
Indicator must be placed in the setup mode,
CONFIG is
GFMT=FINE TRANSFER CO<NL>32400 WEST
HIGHW
AY ROAD<NL>SMALLTOWN<NL2><G>
GROSS<NL>
shown on the display.
A ticket printed using this format might look like the
following:
FINE TRANSFER CO
32400 WEST HIGHWAY ROAD
SMALLTOWN
1345 lb GROSS
6.2.2Using the Front Panel
If you have no access to equipment for communication
through the EDP port or are working at a site where
such equipment cannot be used, you can use the
PFORMT menu (see Figure 6-1) to customize the print
formats.
Using the PFORMT menu, you can edit the print
format strings by
changing the decimal values of the
ASCII characters in the format string.
Lower-case letters and some special
characters cannot be displayed on the 420HE
page 41 and page 42) and are shown as blanks. The
420HE can send or receive any ASCII character; the
character printed depends on the particular ASCII
character set implemented for the receiving device.
front panel (see the ASCII character charts on
Figure 6-1. PFORMT Menu, Showing Alphanumeric Character Entry Procedure
36420HE Installation Manual
Page 41
6.2.3Using Revolution
®
The Revolution configuration utility provides a print formatting grid with a tool bar. The grid allows you to
construct the print format without the formatting commands (<NL> and <SP>) required by the front panel or EDP
command methods. Using
Revolution, you can type text directly into the grid, then select weight value fields from
the tool bar and place them where you want them to appear on the printed ticket.
Figure 6-2 shows an example of the
Revolution print formatting grid.
Figure 6-2. Revolution Print Format Grid
420HE Installation Manual - Print Formatting37
Page 42
7.0Appendix
7.1Error Messages
The 420HE indicator provides a number of error messages. When an error occurs, the message is shown on the
indicator LED display. Error conditions can also be checked remotely by using the XE EDP command as described
in Section 7.1.2 on page 39.
7.1.1Displayed Error Messages
The 420HE provides a number of front panel error messages to assist in problem diagnosis. Table 7-1 lists these
messages and their meanings.
Error MessageDescriptionSolution
E A/DA/D physical errorCall Rice Lake Weighing Systems (RL
EEEROMEEPROM physical error
EVIREEVirgin EEPROMUse TEST menu to perform DEFLT (restore defaults) procedure, then
OVERFLOverflow errorWeight value too large to be displayed.
------Gross > overload limitGross value exceeds overload limit. Check conf
______A/D underrangeA/D reading < –4 mV. Check scale for binding or damage.
RNGERRGRADS > 100,000
WVAL > 100,000
r
n XE command (see Section 7.1.2 on
page 39) to determine error type.
Call RLWS Service if unable to clear err
recurs.
input level. Overload can be caused by input signal > 45 mV or
common mode voltage > 950 mV.
Only shows up in Config mode.
WS) Service.
or by cycling power or if error
iguration or signal
38420HE Installation Manual
Table 7-1. 420HE Error Messages
Page 43
7.1.2Using the XE EDP Command
The XE EDP command can be used to remotely query
420HE for the error conditions shown on the front
the
panel. The XE command returns two 5-digit numbers
in the format:
xxxxx yyyyy
where xxxxx contains a decimal representation of any
existing error conditions as described in Table 7-2.
If more than one error condition exists, the number
returned is the
sum of the values representing the error
conditions. For example, if the XE command returns
the number 1040, this value represents the sum of an A/
D reference error (1024) and an A/D calibration
checksum error (16).
The second number returned (
yyyyy) uses the same bit
assignments as shown in Table 7-2 to indicate whether
the test for the error condition was run. For example,
the value
yyyyy = 50815 represents the decimal
equivalent of the binary value 1100 0110 0111 1111.
Using the bit assignments in Table 7-2, this value
indicates all tests were run.
Two EDP commands, P and ZZ, can be used to provide
status about the indicator. These commands are
described in the following sections.
7.2.1Using the P EDP Command
The P EDP command returns the current displayed
weight value to the EDP port, along with the units
identifier. If the indicator is in an underrange or
overload condition, the weight value is replaced with
&&&&&& (overload) or :::::: (underrange).
7.2.2Using the ZZ EDP Command
The ZZ EDP command can be used to remotely que ry
which annunciators are currently displayed on the
indicator front panel. The ZZ command returns the
currently displayed weight and a decimal number
representing the LED annunciators currently lit. The
format of the returned data is:
wwwwww uu zzz
where wwwwww uu is the current displayed weight and
zzz is the annunciator status value (see Table 7-3).
units,
If more than one annunciator is lit, the second number
returne
annunciators.
Example: If the annunciator status value returned on
the ZZ command is 145, the gross, standstill, and lb
annunciators are lit. 145 represents the sum of the
values for the standstill annunciator (128), gross mode
annunciator (16), and the lb/primary units annunciator
(1).
d is the sum of the values representing the active
Decimal
Value
1lb/primary units
2kg/secondary units
16Gross
32Net
64Center of zero
128Standstill
Table 7-3. Status Codes Returned on the ZZ Command
Annunciator
420HE Installation Manual - Appendix39
Page 44
7.3Continuous Output (Stream) Format
<STX> <POL> <wwwwwww> <UNIT> <G/N> <S> <TERM>
ASCII 02
(decimal)
Weight data: 7 digits, right-justified, with
decimal point, l eading zer o s upr e ssion.
Overload = ^^^^^^^
Underrange = ] ] ] ] ] ] ]
Display overflow = OVERFL
L = pounds
K = kilogram
T = ton
G = grams
O = ounces
<space> = none
G = Gross
N = Net
Status:
< space > = valid
I = Invalid
M = Motion
O = Over/under range
Polarity:
< space
> = Positive
<–> = Negative
<^> = Overload
<]> = Underrange
<CR> <LF>
or <CR>
ASCII 13, 10
(decimal)
Figure 7-1 shows the continuous output format sent to the 420HE EDP or printer port when the STREAM
parameter (SERIAL menu) is set to either EDP or PRN.
Figure 7-1. Continuous Output Data Format
40420HE Installation Manual
Page 45
7.4ASCII Character Chart
Use the decimal values for ASCII characters listed in Tables 7-4 and 7-5 when specifying print format strings on
420HE PFORMT menu. The actual character printed depends on the character mapping used by the output
the
device.
420HE can send or receive any ASCII character value (decimal 0–255), but the indica tor display is limited to
The
numbers, upper-case, unaccented letters, and a few special characters. See Section 7.5 on page 43 for information
about the
Figure 7-2 shows the 7-segment LED character set used to display alphanumeric characters on the 420HE front
panel.
Figure 7-2. 420HE Display Characters
420HE Installation Manual - Appendix43
Page 48
7.6Conversion Factors for Secondary
Note
Units
The 420HE has the capability to mathematically
convert a weight into many different types of units and
instantly display those results with a press of the
key.
Secondary units can be specified on the FORMAT
men
u using the SECNDR parameter, or by using EDP
commands.
•Multipliers are preconfigured within the
indicator. Manual entry is only necessary when
NONE is selected under UNITS. Long tons
and grain units listed in Table 7-6 cannot be
directly specified as primary or secondary
units. For these or other unlisted units of
ht, specify NONE under UNITS.
weig
•Ensure that the secondary decimal point
position is set appropriately
for the scale
capacity in the secondary units. If the
converted value requires more digits than are
available, the indicator will display an
overflow message (
OVERFL).
•For example, if the primary units are short
tons, secon
dary units are pounds, and the
secondary decimal point is set to 8888.88, the
indicator will overflow if 5 tons or more are
applied to the scale. With 5 tons applied, and a
conversion factor of 2000, the secondary units
display needs five digits to the left of the
decimal point to display the 10000 lb
secondary units value.
UNITS
Primary Unitx MultiplierSecondary Unit
grains0.064799grams
0.002286ounces
0.000143pounds
0.000065kilograms
ounces437.500grains
28.3495grams
0.06250pounds
0.02835kilograms
pounds7000.00grains
453.592grams
16.0000ounces
0.453592kilograms
0.000500short tons
0.000446long tons
0.000453metric tons
short tons2000.00pounds
907.185kilograms
0.892857long tons
0.907185metric tons
grams15.4324grains
0.035274ounces
0.002205pounds
0.001000kilograms
kilograms15432.4grains
35.2740ounces
1000.00grams
2.20462pounds
0.001102short tons
0.000984long tons
0.001000metric tons
metric tons2204.62pounds
1000.00kilograms
1.10231short tons
0.984207long tons
long tons2240.00pounds
1016.05kilograms
1.12000short tons
1.01605metric tons
NOTE: Multipliers in italics are preconfigured
Table 7-6. Conversion Factors
44420HE Installation Manual
Page 49
7.7Digital Filtering
1
4
2
8
DIGFL1
32
16
64
1
4
2
8
DIGFL2
32
16
64
1
4
2
8
DIGFL3
32
16
64
8OUT
32OUT
16OUT
64OUT
DFSENS DFTHRH
2OUT
128OUT
4OUT
2DD
NONE
5DD
20DD
10DD
50DD
200DD
100DD
250DD
DIGFL1= n1 DIGFL2= n2 DIGFL3= n3
3rd Stage
Filter A verage
2nd Stage
Filter A verage
1st Stage
Filter A verage
Displayed
Value
n3
2nd Stage
Filter A verages
n2
1st Stage
Filter A verages
n1
A/D Readings
The 420HE uses averaged digital filtering to reduce the effect of vibration on weight readings. Adjustable thresh old
and sensitivity functions allow quick settling by suspending filter averaging, allowing the weight reading to jump
to the new value. Figure 7-3 shows the digital filter parameters on the CONFIG menu.
Figure 7-3. Digital Filtering Parameters on the Configuration (CONFIG) Menu
Figure 7-4. Flow Diagram for 420HE Digital Filters
7. 7. 1D I G F L x Pa r a m e t e r s
The first three digital filtering parameters, DIGFL1,
DIGFL2, and DIGFL3, are configurable filter stages
that control the effect of a single A/D reading on the
displayed weight. The value assigned to each
parameter sets the number of readings received from
the preceding filter stage before averaging (see
7.7.2DFSENS and DFTHRH Parameters
The three digital filters can be used by themselves to
eliminate vibration effects, but heavy filtering also
increases settling time. The DFSENS (digital filter
sensitivity) and DFTHRH (digital filter threshold)
parameters can be used to temporarily override filter
averaging and improve settling time:
Figure 7-4).
The overall filtering effect can be expressed by adding
values assigned to the three filter stages:
the
DIGFL1 + DIGFL2 + DIGFL3
For example, if the filters are configured as
DIGFL1=4, DIGFL2=8, DIGFL3=8, the overall
filtering effect is 20 (4 + 8 + 8). With this
configuration, each A/D reading has a 1-in-20 effect on
the displayed weight value. Setting the filters to 1
effectively disables digital filtering.
•DFSENS specifies the nu mber of consecutive
scale readings that must fall
outside the filter
threshold (DFTHRH) before digital filtering is
suspended.
•DFTHRH sets a threshold value, in display
divisions. When
a specified number of
consecutive scale readings (DFSENS) fall
outside of this threshold, digital filtering is
suspended. Set DFTHRH to NONE to turn off
the filter override.
420HE Installation Manual - Appendix45
Page 50
7.7.3Setting the Digital Filter Parameters
XXXXXXX XXXXXXX ALGOUT DIGIN SETPNT XXXXXXX PROGRM PFORMT SERIAL CALIBR XXXXXXX CONFIG FORMAT
SOURCE
GROSS
0%
20%
OFFSET
ERRACT
FULLSC
HOLD
000000
number
MIN
10000
number
MAX
TWZERO
NET
ZEROSC
VERS
MINNEG
OFF
ON
MAXNEG
OFF
ON
Note
Fine-tuning the digital filter parameters greatly
improves indicator performance in heavy-vibration
environments. Use the following procedure to
determine vibration effects on the scale and optimize
the digital filtering configuration.
1. In setup mode, set all three digital filters
(DIGF
L1, DIGFL2, DIGFL3) to 1. Set
DFTHRH to NONE. Return indicator to
normal mode.
2. Remove all weight from the scale, then watch
indicator display to determine the
the
magnitude of vibration effects on the scale.
Record the weight below which all but a few
readings fall. This value is used to calculate the
DFTHRH parameter value in Step 4.
For example, if a heavy-capacity scale
duces vibration-related readings of up to 50
pro
lb, with occasional spikes to 75 lb, record 50 lb
as the threshold weight value.
3. Place the indicator in setup mode and set the
digital fi
lters (DIGFLx) to eliminate the
vibration effects on the scale. (Leave
DFTHRH set to NONE.) Reconfigure as
necessary to find the lowest effective values
for the DIGFLx parameters.
4. With optimum values assigned to the DIGFLx
parameters, calculate the DFTHRH parameter
by converting the weight value recorded
value
in Step 2 to display divisions:
threshold_weight_value / DSPDIV
In the example in Step 2, with a threshold
weight value of 50 lb and a display division
value of 5lb:
50 / 5lb = 10DD. DFTHRH should
be set to 10DD for this example.
5. Finally, set the DFSENS parameter high
enough to
ignore transient peaks. Longer
transients (typically caused by lower vibration
frequencies) will cause more consecutive
out-of-band readings, so DFSENS should be
set higher to counter low frequency transients.
Reconfigure as necessary to find the lowest
fective value for the DFSENS parameter.
ef
7.8Analog Output Calibration
The following calibration procedure requires a multimeter to measure voltage or current output from the analog
output module. If the option is not already installed, see Section 2.3.5 on page 8.
The analog output must be calibrated after the indicator itself has been configured (Section 3.0) and
calibrated (Section 4.0).
Figure 7-5. Analog Output Menu
1. Enter setup mode and go to the ALGOUT
menu (see Figure 7-5).
•Set OFFSET to 0% for 0–10 V output,
20
% for 4–20 mA output
•Set MIN to lowest weight value to be
tracked by
the analog output
•Set MAX to highest weight value to be
tracked by
the analog output
2. Connect multimeter to analog output:
•For voltage output, connect voltmeter
leads to pins three and four
•F or current output, connect ammeter leads
to
pins one and two
46420HE Installation Manual
3. Adjust zero calibration: Scroll to the
TWZER
O parameter. Check voltage or current
reading on multimeter. Press and hold
to adjust the zero value up or down.
4. Adjust span calibration: Scroll to the TWSPAN
parameter
multimeter. Press and hold
. Check voltage or current reading on
or to adjust the
span value up or down.
5. Final zero calibration: Return to the TWZERO
parameter a
nd verify that the zero calibration
has not drifted. Press and hold
re-adjust the zero value as required.
6. Return to normal mode. Analog output
fu
nction can be verified using test weights.
or
or to
Page 51
Note
7.9Test Mode
A/DTST
TEST
ADOFFS
ADGAIN
DEFLT
Exit
ENTER Move LEFT Move RIGHT
Not Used
Test mode is intended for factory use only.
In addition to normal and setup modes, test mode
provides a number of diagnostic functions for the
420HE, including:
•Display raw A/D count
•Reset configuration parameters to default
va
lues
•A/D internal calibration
Figure 7-6. Test Mode Menu
To enter test mode, press and hold the setup switch
until the front panel display
shows the word
TEST. After
about three seconds, the test mode display
automatically shifts to the first test menu function, A/
DTST.
Figure 7-6 shows the Test Menu structure; Figure 7-7
shows the front panel key functions
in test mode. Note
that, because the Test Menu functions are all on a
single menu level, the
function. Press the
GROSS/NET ( ) key has no
ZERO ( ) key to exit test mode.
Table 7-7 summarizes the test menu functions.
Figure 7-7. Front Panel Key Functions in Test Mode
TEST Menu
FunctionDescription
A/DTSTDisplay A/D test
Press and hold Enter key to display raw count from A/D converter.
DEFLTDefault parameters
at the same time to reset configuration and calibration parameters to factory
Table 7-7. Test Mode Menu Functions
Press setup switch and Enter key
default values. Load cells must be recalibrated before using the indicator (see Section 4.0 on page 27).
420HE Installation Manual - Appendix47
Page 52
7.10Regulatory Mode Functions
REGULAT
Parameter ValueWeight on ScaleTa re in Sy s t e m
NTEPzero or negativenono actionZERO
yesCLEAR TARE
positivenoTARE
yesTARE
CANADAzero or negativenono actionTARE
yesCLEAR TARE
positivenoTARE
yesno action
OIMLzero or negativenono actionZERO
yesCLEAR TAREZERO and CLEAR TARE
positivenoTAREZERO
yesTAREZERO and CLEAR TARE
NONEzero or negativenoTAREZERO
yesCLEAR TARE
positivenoTARE
yesCLEAR TARE
Front Panel Key Function
TAREZERO
Table 7-8. TARE and ZERO Key Functions for REGULAT Parameter Settings
7.11LED Functions
The following is a list of diagnostic LEDs for the
420HE. See Figure 2-3 7 for locations on the 420HE
CPU board.
Serial Port Status
LED1 (EDP Port)Flashing red = TXD activity
Flashing green = RXD activity
On steady or off = No activity
LED2 (PRN Port)Flashing red = TXD activity
Flashing green = RXD activity
On steady or off = No activity
Power Supply
LED (+5AV)Excitation/ADC supply on
LED (+5V & +3.3V)Digital logic supply on
LED AD (ADC)Green = Active
Red = Fault
LED MEM (Memory Test)Green = Pass
Red = Fail
LED ANA Red = Not Implemented
(Analog Option Card)
Digital Input/Output Status
DO 1 (Digital Out 1)On when lit (active low)
DO 2 (Digital Out 2)On when lit (active low)
DI 1 (Digital In 1)On when lit (active low)
DI 2 (Digital In 2)On when lit (active low)
Operation Status
LEDHB (Microprocessor)Flashing green = Active
Red = Fault
48420HE Installation Manual
Page 53
7.12Specifications
Power
Line Voltages115 or 230 VAC
Frequency50 or 60 Hz
Power Consumption1.5 A @ 115 VAC (8W)
0.75 A @ 230 VAC (8W)
Fusing2.5 A 5 x 20 mm fuse
Analog Specifications
Full Scale Input Signal Up to 22.5 mV
Excitation Voltage+5V single sided
8 x 350 or 16 x 700 l
Sense AmplifierDifferential amplifier with
4- and 6-wire sensing
Analog Signal
Input Range–0.5 mV/V to +4.5 mV/V
Analog Signal
Sensitivity0.3 V/gra
1.5 V/gra
Input Impedance200 M,
duation minimum,
d recommended
typical
Noise (ref to input)0.3 V p-p with digital
Internal Resolution8,000,000 counts
Display Resolution100 000 dd
Measurement RateUp to 60 measurements/sec
Input Sensitivity10 nV per internal count
System LinearityWithin 0.01% of full scale
Zero Stability150 nV/°C, maximum
Span Stability3.5 ppm/°C, maximum
Calibration MethodSoftware, constants stored in EEPROM
Common Mode
Voltage–2.35 to +3.45 V, referred to ground
Rejection130 dB minimum @ 50 or 60 Hz
Normal Mode
Rejection90 dB minimum @ 50 or 60 Hz
Input Overload± 12 V conti
nuous, static discharge
protected
RFI ProtectionSignal, excitation
protected by capacitor bypass
Analog OutputOptional: ful
ly isolated, voltage or
current output,14-bit resolution.
Voltage output: 0 –10 VDC
Load resistance:1K minimum
Current output: 0–20/4–20 mA
External loop resistance: 500
ma
ximum
oad cells
filters at 4-4-4
, and sense lines
Serial Communications
EDP PortFull duplex RS-232
Printer PortFull duplex RS-232 or active transmit
on
ly 20 mA current loop
Both Ports38400, 19200, 9600, 4800, 2400,
12
00, 600, 300 bps; 7 or 8 data bits;
even, odd, or no parity
Operator Interface
Display6-digit LED display. 7-segment, 1.8 in
LED annunciatorsGross, net, center of zero, standstill, lb/
Keypad6-button keypad
(44.5 mm) digits
primary units, kg/secondary units,
count, tare
Environmental
Operating Temperature–10 to +40°C (legal);
–10 to +50°C (industrial)
Storage Temperature –25 to +70°C
Humidity0–95% relative humidity
Enclosure
Enclosure Dimensions 10.5 in x 12.5 in x 6.4 in
26.7 cm x 31.75 cm x 16.3 cm
Weight7.8 lb. (3.54 Kg)
Rating/MaterialUL Type 4X
Certifications and Approvals
O
C
N
F
L
E
A
R
N
E
O
I
N
T
C
A
E
N
•
•
O
N
W
S
E
R
E
U
I
S
G
A
H
E
T
S
M
A
D
N
NTEP
CoC Number04-076
Accuracy ClassIII/III L
n
max : 10 000
Measurement Canada (Pending)
Accuracy ClassIII/III HD
n
max
: 10 000
Digital Specifications
MicrocomputerPhillips PXAG30K main processor @
19.6608 MHz
Digital Inputs2 inputs, TT
active-low
Digital Outputs2 outputs, 250 mA Max Sink
Digital Filters3 filters, software selectable
L or switch closure,
420HE Installation Manual - Appendix49
Page 54
420HE Limited Warranty
Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a
Distributor or Original Equipment Manufacturer (OEM) will operate per written specifications as confirmed by the
Distributor/OEM and accepted by RLWS. All systems and components are warranted against defects in materials
and workmanship for two years.
RLWS warrants that the equipment sold hereunder will conform to the current written specifications authorized by
RLWS. RLWS warrants the equipment against faulty workmanship and defective materials. If any equipment fails
to conform to these warranties, RLWS will, at its option, repair or replace such goods returned within the warranty
period subject to the following conditions:
•Upon discovery by Buyer of such nonconformity, RLWS will be given prompt written notice with a
detailed explanation of the alleged deficiencies.
•Individual electronic components returned to RLWS for warranty purposes must be packaged to
prevent electrostatic discharge (ESD) damage in shipment. Packaging requirements a re listed in a
publication, Protecting Your Components From Static Damage in Shipment, available from RLWS
Equipment Return Department.
•Examination of such equipment by RLWS confirms that the nonconformity actually exists, and was
not caused by accident, misuse, neglect, alteration, improper installation, improper repair or improper
testing; RLWS shall be the sole judge of all alleged non-conformities.
•Such equipment has not been modified, altered, or changed by any person other than RL WS o r its duly
authorized repair agents.
•RLWS will have a reasonable time to repair or replace the defective equipment. Buyer is responsible
for shipping charges both ways.
•In no event will RLWS be responsible for travel time or on-location repairs, including assembly or
disassembly of equipment, nor will RLWS be liable for the cost of any repairs made by others.