Rice Lake 420 User Manual
420 Plus
HMI Digital Weight Indicator
Version 1.15
Installation Manual
85127 Rev A
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
Safety ........................................................................................................................................... 1
1.0 Introduction.................................................................................................................................. 2
1.1 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Front Panel Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 LED Annunciators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Indicator Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.1 Toggle Gross/Net Mode/Piece Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.2 Toggle Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.3 Zero Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.4 Acquire Tare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.5 Enter Tare (Keyed Tare). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.6 Remove Stored Tare Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.7 Acquire Parts Sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.8 Display Part Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.9 Display Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.10 Display or Change Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.11 Display or Change Setpoint Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.12 Turn Setpoint On or Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.13 Print Ticket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.14 Enter New ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 Installation ................................................................................................................................... 6
2.1 Unpacking and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Enclosure Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Cable Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3.1 Cable Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.2 Bypass Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.3 DC Power Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.4 Load Cells. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.5 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.6 Digital I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.7 Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4 Analog Output Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Enclosure Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6 Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.7 Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.0 Configuration ............................................................................................................................. 15
3.1 Configuration Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.1 Revolution Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.2 EDP Command Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.3 Front Panel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Menu Structures and Parameter Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2.1 Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2.2 Format Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2.3 Calibration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2.4 Serial Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
© 2012 Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice.
Rice Lake Weighing Systems is an ISO 9001 registered company.
Version 1.15, December 2012
i
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.
3.2.5 Program Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2.6 Print Format Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2.7 Setpoint Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2.8 Digital Input Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2.9 Analog Output Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.10 Version Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.0 Calibration ................................................................................................................................. 30
4.1 Front Panel Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.2 EDP Command Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.3 Revolution Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.4 More About Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4.1 Adjusting Final Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4.2 Zero Deadload A/D Counts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.0 EDP Commands.......................................................................................................................... 33
5.1 The EDP Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.1.1 Key Press Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.1.2 Reporting Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.1.3 The RESETCONFIGURATION Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.1.4 Parameter Setting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.1.5 Soft Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.1.6 Normal Mode Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2 Saving and Transferring Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.2.1 Saving Indicator Data to a Personal Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.2.2 Downloading Configuration Data from PC to Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.0 Print Formatting ......................................................................................................................... 39
6.1 Print Formatting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.2 Customizing Print Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.2.1 Using the EDP Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.2.2 Using the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.2.3 Using Revolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.0 Appendix .................................................................................................................................... 42
7.1 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1.1 Displayed Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1.2 Using the XE EDP Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.2 Status Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.2.1 Using the P EDP Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.2.2 Using the ZZ EDP Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.3 Continuous Output (Stream) Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.4 ASCII Character Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.5 Front Panel Display Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.6 Conversion Factors for Secondary Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.7 Digital Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.7.1 DIGFLx Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.7.2 DFSENS and DFTHRH Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.7.3 Setting the Digital Filter Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.8 Analog Output Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.9 Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.10 Regulatory Mode Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.11 LED Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.12 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
420 Plus Limited Warranty .................................................................................................................... 54
ii 420 Plus Installation Manual
About This Manual
WARNING
WARNING
Important
CAUTION
WARNING
This manual is intended for use by service technicians
responsible for installing and servicing
420 Plus HMI
digital weight indicators. This manual applies to
indicators using Version 1.14 of the
420 Plus software.
Configuration and calibration of the indicator can be
accomp
EDP command set, or the
lished using the indicator front panel keys, the
Revolution
®
configuration
utility. See Section 3.1 on page 15 for information
about configuration methods.
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 a potentially hazardous situation that, if not avoided may result in minor or moderate injury.
Indicates information about procedures that, if not observed, could
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 m
are to be performed by qualified service personnel only.
anual require work inside the indicator enclosure. These procedures
This manual can be viewed from the Rice
Lake Weighing Systems distributor site at
www.ricelake.com.
The Operator Car
basic operating instructions for users of the
d included with this manual provides
420 Plus.
Please leave the Operator Card with the indicator
when installation and configuration are complete.
result in damage to equipment or
r heed the warnings could result in injury or
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.
420 Plus Installation Manual - Safety 1
1.0 Introduction
The 420 Plus is a single-channel digital weight
indicator housed in a NEMA 4X/IP66-rated stainless
steel enclosure. The indicator front panel consists of a
large (.8 in, 20 mm), six-digit, seven-segment LED
display and twenty-one-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 output-only RS-232 or 20 mA
current loop communications at up to 38400
bps
• Optional analog output module provides 0–10
VDC or 0–20/4–20 mA tracking of gross or net
weight values
• Available in 115 VAC and 230 VAC versions
• Available in DC power version
The 420 Plus is NTEP-certified and pending
Measurement Canada approval for Classes III, III HD,
and III L at 10,000 divisions. See
Section 7.12 on
page 53 for detailed specifications.
1.1 Operating Modes
The 420 Plus 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
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
Piece Count (Secondary) Mode
In piece count mode, the indicator display shows
the number of parts on the scale rather than the
weight of those parts. Piece count mode has two
submodes:
• Count display mode displays the current parts
count and allows ticket printing using the
CFMT print format.
• Sample acquisition mode is used to calibrate
the indicator for parts counting.
Operator access to piece count mode is disabled
when the indicator is shipped from the factory.
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, remove the large fillister head
screw from the bottom of the enclosure. Insert a
screwdriver or a similar tool into the access hole
and press the setup switch once. The indicator
display changes to show the word
Section 1.3 on page 3 to indicate scale
420 Plus can operate.
CONFIG.
2 420 Plus Installation Manual
Test mode
Test mode provides a number of diagnostic
functions for the
420 Plus indicator. Like setup
mode, test mode is entered using the setup switch.
Section 7.9 on page 51 for more information
See
about entering and using test mode.
1.2 Front Panel Keypad
lb
kg
Count
Gross
Net
DISPLAY
TARE
SETPOINT TIME/DATE
POWER
I/O
2
3 4 5
7 8 9 0 6
CLR
ZERO GROSS
NET
TARE
ENTER MODE SAMPLE
UNITS PRINT
Figure 1-1 shows the 420 Plus LED annunciators,
keypad, and normal mode key functions.
The symbols shown above the keys (representing up,
down, enter, 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 16 for information about using
the front panel keys in setup mode.
Figure 1-1. 420 Plus Front Panel, Showing LED Annunciators and Normal Mode Key Functions
1.3 LED Annunciators
The 420 Plus display uses a set of eight LED
annunciators to provide additional information about
the value being displayed:
Gross and Net annunciators are lit to show
•
whether the displayed weight is a gross or net
weight.
): Gross weight is within
): Scale is at standstill or
• Center of zero (
0.25 graduations of zero. This annunciator
lights whe
• Standstill (
within the specified motion band. Some
operations, including tare functions
printing, can only be done when the standstill
symbol is shown.
lb and kg annunciators indicate the units
•
associated with the displayed value:
lb=pounds, kg=kilograms.
n the scale is zeroed.
and
• The displayed units can also be set to short
tons (tn
), metric tons (t), ounces (oz), grams
(g), or NONE (no units information displayed).
lb and kg LEDs function as primary and
The
secondary units annunciators for some
combinations of primary and secondary units.
If neither primary nor secondary units are lb or
kg the
for secondary units.
•The
indicator is in piece count mode.
• The Tare Acquired (
lb annunciator is lit for primary units, kg
Count annunciator is lit to show that the
) lights to show that a
tare value was entered.
420 Plus Installation Manual - Introduction 3
Table 1-1 shows which annunciators are used for all combinations of configured primary and secondary units. For
Note
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 on page 19 for more information about configuring primary and secondary display units.
Secondary Unit
Primary Unit
lb lb / lb lb / kg lb / oz lb / g lb / kg
kg kg / lb kg / kg kg / oz kg / g lb / kg
oz oz / lb oz / kg oz / oz oz / g oz / kg
g g / lb g / kg g / oz g / g g / kg
tn lb / kg lb / kg lb / oz lb / g lb / lb lb / kg lb / kg
t lb / kg lb / lb lb / kg
none lb / kg lb / kg lb / lb
Table 1-1. Units Annunciators, Showing Primary / Secondary LEDs Used for All Configurations
lb kg oz g tn t none
1.4 Indicator Operations
Basic 420 Plus operations are summarized below.
1.4.1 Toggle Gross/Net Mode/Piece Count
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
1.4.2 Toggle Units
Net annunciator.
Gross annunciator; net
Press the UNITS key to switch between primary and
secondary units. The appropriate units LED to the right
of the display is lit.
1.4.3 Zero Scale
1. In gross mode, remove all weight from the
scale and wait for the standstill annunciator
(
2. Press the
).
ZERO key. The center of zero ( )
annunciator lights to indicate the scale is
zeroed.
1.4.4 Acquire 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
the (
) annunciator lights to show the tare
value was entered
1.4.5 Enter Tare (Keyed Tare)
1. Use the numeric keypad to enter the tare value,
then press the TARE key.
2. Net weight is displayed and the (
annunciator lights to show the tare value was
entered.
1.4.6 Remove Stored Tare Value
1. Remove all weight from the scale and wait for
the standstill annunciator (
2. Press the
TAR E key. The ( ) annunciator goes
off, indicating the tare value has been removed.
Indicators with the REGULA parameter set to
NONE or NTEP (see Section 3.2.5 on page 23)
can clear a stored tare value using the
following pr
ocedure:
1. Press DISPLAY TARE to show the stored tare
value.
2. Press the
CLEAR key twice to remove the
stored tare.
)
).
4 420 Plus Installation Manual
1.4.7 Acquire Parts Sample
Note
1. Place empty parts container on scale. Wait for
the standstill annunciator (
TARE to acquire the tare weight of the
), then press
container.
2. Press
MODE (GROSS/NET) key to enter piece
count mode.
Press the
3. Press the
CLEAR key to exit.
SAMPLE (UNITS) key to enter sample
acquisition mode.
The indicator display shows the message
where
nnn is the sample quantity to be placed on the
Addnnn,
scale. You can do one of the following:
•Add the number of parts shown.
•Choose a different sample size. Press the
SAMPLE key to scroll through the
selectable sample quantities (5, 10, 20, 50,
100) or use the numeric keypad to specify
a custom sample size.
•Specify a known piece weight. Press the
SAMPLE key to scroll through the
selectable sample quantities until the
WGT prompt is shown. Use the numeric
PC
keypad to enter the piece weight.
4. Once the sample quantity is
ENTER to calibrate the indicator for counting
on the scale, press
the new parts. If a sample size was specified,
the indicator display shows the message –CNT–
as it acquires the sample weight, then switches
to count display mode and shows the part
quantity. If a known piece weight was
specified, the display switches to count display
mode immediately.
1.4.8 Display Part Weight
To view gross and net weight parts, press MODE to
switch from count display mode to normal weighing
mode. To view the current piece weight while in count
mode, press
1.4.9 Display Accumulator
DISPLAY TARE key
Hold the (MODE) GROSS/NET key for three seconds to
display the accumulated value if enabled in
configuration.
The accumulated value will be displayed for about 10
seconds.
To clear the accumulator, press the
CLR key
twice while the accumulated value is being displayed.
To set the time, press the
TIME/DATE key twice. Use the
numeric keypad to enter the time in 24-hour format,
then press the
1.4.11 Display or Change Setpoint Value
ENTER key.
The time and date is backed up with the
battery. If the main power is interrupted, time/
date should not
be lost.
To display a setpoint value, use the numeric keypad to
enter the setpoint number, then press the
SETPOINT key.
Or, you can display a setpoint value by pressing the
SETPOINT key a number of times equal to the setpoint
number. For example, to display the value of setpoint 2,
press the
The current value will display
to enter the new value and press the
SETPOINT key two times.
, use the numeric keypad
ENTER key. This
will bring you back to the TRIP submenu. To exit and
save, press the
ZERO ( ) and GROSS/NET ( ) to navigate to the
CONFIG menu. Press
UNITS ( ) and PRINT ( ) keys and
to exit and save. Use
Figure 3-11, “Setpoint Menu,” on page 25 to navigate
the menus.
1.4.12 Turn Setpoint On or Off
To turn a setpoint on or off at the front panel, press the
SETPOINT key a number of times equal to the setpoint
number (for example, for setpoint number 2 press the
SETPOINT key two times). Press TAR E to exit value
input mode and go left to
arrow key to select
ENABLE and use the down
On or Off. At this point if the
setpoint is on, you can turn it off by using the right or
left arrow keys.
1.4.13 Print Ticket
1. Wait for standstill annunciator ( ).
2. Press the
PRINT key to send data to the serial
port.
1.4.14 Enter New ID
1. Ensure digital input 1 or digital input 2 is
configured for NEWID.
2. Activate the digital input.
3. Once activated, the digital input will
go into ID
mode.
4. Enter the ID using the nume
ric keypad and
press TARE .
1.4.10 Display or Change Time
To display the date, press the TIME/DATE key once;
TIME/DATE a second time to display the time.
press
To set the date, press the
numeric keypad to enter the date, then press the
TIME/DATE key once. Use the
ENTER
key. Use the numeric keypad to enter the date in the
same format configured for the indicator: MMDDYY,
DDMMYY, or YYMMDD.
420 Plus Installation Manual - Introduction 5
2.0 Installation
CAUTION
WARNING
Note
Setup Switch
Access Screw
Communications Access
Cord Grip (Plugged)
Power Cord
Front of
Indicator
Backplate
Bottom View
Load Cell Cable
Cord Grip (Open)
This section describes procedures for connecting load
cells, digital inputs, and serial communications cables
to the
420 Plus 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
disc
onnect for the
supplying the indicator must be installed near the
unit and be easily accessible
Procedures requiring work
420 Plus. The power outlet
2.1 Unpacking and Assembly
Immediately after unpacking, visually inspect the 420
to ensure all components are included and
Plus
undamaged. The shipping carton should contain the
indicator with attached tilt stand, 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 85219) contains the items listed
low:
be
• Two, six-position screw terminals (PN 70599)
for connector
screw terminals (PN 71125) for connectors J2
and J3, and one, four-position screw terminal
(PN 71126) for connector J6 (see figure 2-4).
• Two 8-32NC x 7/16 fillister head screws (PN
623).
30
• Four 8-32NC x 3/8 machine screws (PN
862) for the indicator backplate (see #1 in
14
Figure 2-8 13).
• Six neoprene washers (PN 45042) for
ba
ckplate screws included in the parts kit.
• Four rubber bumpers (“feet”) for the tilt stand,
(PN 42
149).
• Three reducing glands (PN 15664).
• One capacity label (PN 42350).
• Three each of grounding clamps (PN 53075),
external too
kep nuts (PN 14626) for cable shield
grounding against the enclosure.
s J4 & J1, two, three-position
th lock washers (PN 15133), and
• One SEC C (section cap) and CLC
(Concentrated Load) (PN 8
5552) label.
• Annunciator labels (PN 85555), replacement
overlay
decals for labeling primary and
secondary units LEDs.
2.2 Enclosure Disassembly
The indicator enclosure must be opened to connect
cables for load cells, communications, digital inputs,
and analog output.
The 420 Plus has an on/off switch for the
load cells and processor functions. Before
disconnected from the power outlet. The power outlet
opening the
must be located near the indicator to allow the operator to
easily disconnect power to the unit.
unit, ensure the power cord is
Ensure power to the indicator is disconnected, then
place the indicator face-down on an antistatic work
mat. Remove the screws that hold the backplate to the
enclosure body, then lift the backplate away from the
enclosure and set it aside.
2.3 Cable Connections
The 420 Plus 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.
The unit will keep the date and time as long as
it is plugged in, Even if display and load cells
are turned off.
will lose date and time information.
Figure 2-1 shows the recommended assignments for
420 Plus cord grips.
the
Figure 2-1. Recommended Cord Grip Assignments
When the unit is unplugged, it
6 420 Plus Installation Manual
2.3.1 Cable Grounding
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
Except for the power cord, all cables routed through the
cord grips should be grounded against the indicator
enclosure. Do the following to ground shielded cables:
• Use the lockwashers, clamps, and kep nuts
vided in the parts kit to install grounding
pro
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
foil from the cable half an inch (15 mm)
and
past the grounding clamp (see Figure 2-2).
Fold the foil shield back on the ca
ble 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
insulation 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
ast the grounding clamp. Shield wire function
p
is provided by contact between the cable shield
and the grounding clamp.
• Route stripped cables th
rough cord grips and
clamps. Ensure shields contact grounding
clamps as shown in Figure 2-2. Tighten
grounding clamp nuts.
• Finish installation using cable mounts and ties
cure cables inside of indicator enclosure.
to se
Figure 2-2. Grounding Clamp Attachment for Foil-Shielded
and Braided Cabling
2.3.2 Bypass Power Button
If jumper JMP1 is set for SW position, the power
switch on the front panel of the indicator will turn the
unit ON or OFF. If it is not in the SW position, the
indicator will power up as soon as the AC is applied.
This allows the front panel overlay power control
switch to be bypassed. Label “F” in Figure 2-3 shows
the location of JMP1. Figure 2-4 on page 8 shows
entire board.
Figure 2-3. 420 Plus CPU and Power Supply Board JMP1
Shunt Location
420 Plus Installation Manual - Installation 7
8 420 Plus Installation Manual
Figure 2-4. 420 Plus CPU and Power Supply Board
*/
(/%
$)"
(OE
(OE
%$065
8JSF"TTFNCMZ
1/UP+PO
$16#PBSE1/
Figure 2-5. 420 Plus DC Power Supply
Note
Note
2.3.3 DC Power Wiring Guidelines
Based on:
• 8 x 350
• Analog output installed
• Digital outputs sourcing 20mA each
• Drawing maximum current at 7.5 VDC from
the
DC/DC power supply
DC power wiring to the indicator should be 18
AWG to 14 AWG for DC+, DC-, and earth
round conductors.
g
In a mobile application, earth ground (chassis) should
be terminated to the vehicle chassis.
In longer power cable runs, voltage drop over the
r conductor needs to be considered. See table and
powe
formula below to compute voltage drop.
= (2.85A)(x / 1000ft)(length of run in ft.)
V
DROP
2.85A = maximum current draw from DC/DC power
supply
x = Oh
ms from Table 2-1
Wire Gauge
(AWG)
14
15
16
17
18
Impedance
(OHMS/1000ft)
2.252
3.184
4.016
5.064
6.385
Table 2-1. Cable Impedance
Cable
DC voltage supplied to DC/DC power supply
should not be less than 9VDC. Using larger
gauge wire will result
in less voltage drop.
Example:
100ft run with 18 AWG wire
= (2.85A)(6.385 / 1000ft)(100 ft)
V
V
DROP
= 1.82V
DROP
12VDC will drop to 10.18V after 100ft run.
420 Plus Installation Manual - Installation 9
2.3.4 Load Cells
Note
To attach cable from a load cell or junction box,
remove connector J1 from the board. The connector
plugs into a header on the board as shown in Figure 2-4
8.
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 2-4 8). 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 2-4). 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 Pin Function
1
2
3
4
5
6
+SIG
–SIG
+SENSE
–SENSE
+EXC
–EXC
Table 2-2. 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
2.3.5 Serial 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 2-3.
Once cables are attached, reconnec
t J3 and J4 to the
headers on the board (see Figure 2-4). 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 duplex RS-232 transmission.
Both ports are configured using the SERIAL menu. See
Section 3.0 on page 15 for configuration information.
Port Connector Pin Label
Serial Port J4
1
TxD
2
RxD
3
Gnd
4
20mA+
5
20mA–
6
Gnd
Table 2-3. J3 and J4 Pin Assignments
2.3.6 Digital I/O
Digital inputs can be set to provide several indicator
functions, including all keypad functions. 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.
Port Connector Pin Label
Digital Input J2
Digital
Output
J6
Table 2-4. J2 and J6 Pin Assignments
1 DI 1
2 DI 2
3 Gnd
1 Gnd
2 DO 1
3 DO 2
4 +5V
Port Connector Pin Label
EDP/RS-232 J3
Table 2-3. J3 and J4 Pin Assignments
10 420 Plus Installation Manual
1
TxD
2
RxD
3
Gnd
2.3.7 Analog Output
1
6
9
4
2
5
7
10
Torque Pattern
8
3
NTEP - Approval
Fastener
If the optional analog output module is installed, attach
the output cable to connector J1 on the analog output
board. Tab l e 2-5 lists the analog output pin
assignments.
Use the ALGOUT menu to configure and calibrate the
analog out
Section 2.4 for information about installing the
put module when cabling is complete. See
analog
output module.
Pin Signal
1 + Current Out
2 – Current Out
3 + Voltage Out
4 – Voltage Out
Table 2-5. Analog Output Module Pin Assignments
2.4 Analog 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
420 Plus enclosure.
Mount the analog output module on its standoffs in the
location shown in Figure 2-4 8 and plug the module
input into connector J9
on the 420 Plus board. Connect
output cable to the analog output module as shown in
Table 2-5, then reassemble the enclosure (Section 2.5).
See Figure 7.8 50 for analog output calibration
procedures.
2.5 Enclosure Reassembly
Once cabling is complete, position the backplate over
the enclosure and reinstall the backplate screws. Use
the torque pattern shown in Figure 2-6 to prevent
distorting the backplate gasket. Torque screws to 15
in-lb (1.7
N-m).
Figure 2-7. NTEP Sealing
2.6 Board Removal
If you must remove the 420 Plus CPU board, use the
following procedure:
1. Disconnect power to the indicator. Remove
backplate as describe
page 6.
2. Disconnect power supply cable from connector
J7 on
the 420 Plus CPU board.
3. Unplug connectors J1 (load cell cable), J2
(digital inputs), J3 (EDP/RS-232), J4 (serial
communications), J6 (digital outputs), and J1
& J11 (keypad ribbon cables). If an analog
output board is installed, disconnect the analog
output cable. See Figure 2-4 8 for connector
locations.
4. Remove the five screws from the CPU board,
then lift t
he board out of the enclosure.
To replace the CPU board, reverse the above
procedure. Be sure to reinstall cable ties to secure all
ca
bles inside the indicator enclosure.
d in Section 2.2 on
0
Figure 2-6. 420 Plus Enclosure Backplate
Torqued screws may become less tight as the gasket is
compressed during torque pattern, therefore a second
torque is required using the same pattern and torque
value.
420 Plus Installation Manual - Installation 11
2.7 Replacement Parts
Table 2-6 lists replacement parts for the 420 Plus, including all parts referenced in Figures 2-8 and 2-9.
Ref
Number
1 14862
2 45042
3 84387
4 84388
5 14839
6 85123
7 84386
8 15144
9 68403
10 29635
11 44676
12 42640
13 19538
14 15626
15 30375
16 85202
17 84389
18 76556
20 84397
21 68216
22 85151
23 16892
24 15134
25 45043
27 14626
28 15627
30 85494
32 15376
PN Description (Quantity) Figure
Screws 8-32NC x 3/8 (8) Figure 2-9 14
Sealing washers (8)
Backplate (1)
backplate gasket (1)
Screws 6-32NC x 1/4 (9)
CPU and display board assembly (1)
Enclosure (1)
Nylon washers 1/4x1x1/16 (2)
Four-cornered wing knobs for tilt stand (2)
Tilt stand (1)
Sealing washer (1)
Screws 1/4-28NF X 1/4 (2)
Cable grip plugs (2)
Cable grips (3)
Nylon seal rings for cable grips (3)
Power cord assembly – 115 VAC
85203
Power cord assembly – 220 VAC
Power supply bracket (1)
Power supply switch (1)
85554
Power supply, DC/DC converter
Overlay panel (1) Figure 2-8 13
Rice Lake nameplate (1)
Power supply ribbon cable(1)
Earth ground label (1)
Lock washer, No 8, Type A (3)
Ground wire 4 in, No. 8 (1)
Kep nuts, 8-32NC Hex (5)
Locknuts (3)
Protective cover (1) Figure 2-9 14
Standoffs, male - female (6)
85791
Fuse, 2.5 Amp 5x20mm
12 420 Plus Installation Manual
Table 2-6. Replacement Parts
20
21
22
To J7 header on PC Board (6)
From Power Cord (16)
23
28
5-pin overlay
8-pin overlay
Ground Wire Detail
25
27
24
To backplate (3)
From power cord (16)
24
25
27
Figure 2-8. 420 Plus Overlay and Power Supply
420 Plus Installation Manual - Installation 13
1
2
3
4
5
6
7
8
9
10
12
11
13
14
15
16
17
18
32
30
14 420 Plus Installation Manual
Figure 2-9. 420 Plus Enclosure, Backplate and CPU Board
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