Rice Lake 420 Plus HMI Digital Weight Indicator Installation Manual - Manual (Page 6)

2 420 Plus Installation Manual
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
The
4 2 0 Pl u s
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 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
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.