AccuPro-5000
™
MEASUREMENT SYSTEM OPERATOR MANUAL
Issued by Department:
Engineering
Doc. Number:
5000-00-00-002
Revision:
02
Effective Date:
10/05/2021
File: 5000-00-00-002-r2_
AccuPro_5000_Operator_Manual
Copyright© 2021 Scaletron Industries, Ltd
All Rights Reserved
Page
15
of
63
4.1.1
Features:
•
AVR Processor
: An Atmel microprocessor that includes internal SRAM and Flash Memory.
•
Main Processor Board Interface
: The LCD Board communicates with the Main Processor
Board via a full-duplex, RS-232 comm link. The LCD Board sends user-control events such as
Keypad presses and Rotary Knob movement to the Main Processor Board, while the Main Processor
Board sends messages to the LCD Board for display.
•
Programmer (JTAG) Interface
: The AVR processor is programmed via an Atmel ICE. Model
# ATATMEL-ICE, A09-2140/08.
•
Keypad Interface
: A custom 9-pin connection to the membrane switch overlay consisting of 4
row and 5 column traces for supporting up to 20 push-buttons.
•
Keypad Matrix Configuration Jumper
: A 3-pin jumper field that the AVR processor reads to
determine the configuration of the membrane switch overlay. With no jumper-shunt installed, the
configuration defaults to a 1-row x 3-column switch matrix. Other configurations remain undefined
at the time of this printing.
•
Serial Debug Port
: This port is for factory use only.
•
Rotary Knob Interface(s)
: Supports an optional rotary control used for menu navigation and
data entry.
•
Local Reset
: Pressing this button resets the AVR Processor.
•
LCD Module
: An alpha-numeric, 2-row by 16-character, monochrome Liquid Crystal Display
(LCD). Limited graphic capability is also supported.
•
Status LED Array
: A bi-color LED (producing 4 states); one LED for each supported channel.
•
LCD Contrast Adjust
: A single-turn, analog potentiometer for adjusting contrast of the LCD
Module.
•
Heartbeat LED
: An interior LED whose state is toggled via software at approximately 0.5Hz as a
high-level indicator that the microprocessor code is executing normally. If this LED ever stops
blinking, a power-cycle may be required to recover.
4.2
Backplane Board
With reference to Figure 2, the Backplane Board provides a platform into which other circuit boards are
inserted for distribution of power and interconnection of shared signals. Inserted boards include a Main
Processor Board and support for up to two measurement channels. Each channel consists of an Analog
Input Board (required), an Analog Output Board (optional), and a Relay Output Board (optional).
Designated connectors are assigned for each board type which utilize locking card-guides to ensure a
secure fit.