420 Plus Installation Manual - Introduction
1
About This Manual
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
accomplished using the indicator front panel keys, the
EDP command set, or the
Revolution
®
configuration
utility. See Section 3.1 on page 14 for information
about configuration methods.
Some procedures described in this
manual require work inside the
indicator enclosure. These procedures
are to be performed by qualified
service personnel only.
This manual can be viewed 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
420 Plus
. Please leave the
Operator Card
with the
indicator when installation and configuration are
complete.
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 350
or 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
T h e
4 2 0 Plu s
i s N T E P - c e r t i f i e d a n d p e n d i n g
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 Section 1.3 on page 2 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
420 Plus
can
operate.
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
CONFIG
.
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.
See Section 7.9 on page 51 for more information
about entering and using test mode.
Warning
