Focal 923 User manual

Focal Technologies Corporation
A Moog Inc. Company
77 Frazee Avenue
Dartmouth, Nova Scotia, Canada B3B 1Z4
Tel: [phone] | www.moog.com/focal
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Model 923
Data Logger
User Manual
Document No.:
923-0603-01
Revision:
2
Author(s):
R.Sawler
Date of Issue:
2017-04-24

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Focal Technologies Corporation Page ii
A Moog Inc. Company Document No: 923-0603-01, Rev. 2
Document Revision History
Document
Revision
Details of Revision
Author(s)
Date
[yyyy-mm-dd]
Rev 1
Initial release.
A. Cabrera
2015-08-10
Rev 2
-Updated title page, headers and footers
-Change all references of 4 analog channels to 2
-Update GUI images
-Update board images to Rev4.0
-Update Analog Inputs section for 2 channel description
-Add Adjustable Analog Input display to special features
-Updated Serial Output Mode in Modbus table to show
only Modbus RTU is supported
R. Sawler
2017-04-24
Reference Documents
Document Number
Document Title and Description
923-2004-00
Model 923 Data Logger Configuration Drawing

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
TABLE OF CONTENTS
1.0 Introduction........................................................................................................................................... 1-1
2.0 Specifications....................................................................................................................................... 2-1
3.0 Product Description............................................................................................................................. 3-1
3.1 Configuration Settings and Initial User Setup............................................................................... 3-2
3.1.1 Configuration Settings ..................................................................................................... 3-2
3.1.2 Initial User Setup ............................................................................................................. 3-3
3.2 Data Logging ................................................................................................................................ 3-3
3.3 Real Time Clock (RTC) ................................................................................................................ 3-3
3.4 On-Board Sensors........................................................................................................................ 3-4
3.4.1 Temperature and Humidity Sensor ................................................................................. 3-4
3.4.2 3-Axis Accelerometer Sensor (Shock and Vibration)...................................................... 3-4
3.4.3 Ambient Light Sensor ...................................................................................................... 3-4
3.4.4 Rotation Sensor (Turns Counter and Speed).................................................................. 3-4
3.5 Interfaces...................................................................................................................................... 3-5
3.5.1 Thermocouple Inputs....................................................................................................... 3-5
3.5.2 Analog Inputs................................................................................................................... 3-5
4.0 Hardware............................................................................................................................................... 4-1
4.1 General Board Handling............................................................................................................... 4-1
5.0 Electrical Connectors and Pin Descriptions ..................................................................................... 5-1
5.1 9-pin Micro-D Power and Data Connector (J5) ............................................................................ 5-1
5.2 Thermocouple Input Connectors (J6, J15)................................................................................... 5-1
5.3 12-Pin Analog Input Connector (J4)............................................................................................. 5-2
6.0 Functionality......................................................................................................................................... 6-1
6.1 Serial Diagnostic Interface............................................................................................................ 6-1
6.1.1 Modbus RTU ................................................................................................................... 6-1
6.2 Diagnostics Software.................................................................................................................... 6-2
6.2.1 Overview.......................................................................................................................... 6-2
6.2.2 Installation........................................................................................................................ 6-3
6.2.3 Application Usage............................................................................................................ 6-3
6.2.4 Special Features.............................................................................................................. 6-5
7.0 Register Maps....................................................................................................................................... 7-1
7.1 Modbus RTU Register Map.......................................................................................................... 7-1
7.1.1 On-board Sensor Registers............................................................................................. 7-4
7.1.2 Sensor Data Conversion ................................................................................................. 7-5

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
LIST OF TABLES
Table 2-1: Specifications....................................................................................................................................2-1
Table 3-1: Factory Default Card Configuration Settings (as-built).....................................................................3-2
Table 5-1: Connector/Mating Connector Part Numbers ....................................................................................5-1
Table 5-2: Micro-D (9-pin) Connector (J5) Pin out.............................................................................................5-1
Table 5-3: Thermocouple Input (3-pin) Connector (J6, J15) Pinout ..................................................................5-1
Table 5-4: Analog Input (12-pin) Connector (J4) Pin out...................................................................................5-2
Table 6-1: Modbus RTU Frame Format and 923-EDL Defaults........................................................................6-1
LIST OF FIGURES
Figure 1-1: Model 923 Electronic Data Logger Card .........................................................................................1-1
Figure 3-1: Model 923-EDL Part Locations........................................................................................................3-1
Figure 3-2: Model 923-EDL Typical Setup Connection Using a PC and Focal GUI..........................................3-3
Figure 4-1: Model 923-EDL PCBA.....................................................................................................................4-1
Figure 5-1: Micro-D (9-pin) Power & Data Connector (J5) ................................................................................5-1
Figure 5-2: Thermocouple Input Connectors (J6, J15)......................................................................................5-1
Figure 5-3: 12-pin Analog Input Connector (J4) ................................................................................................5-2
Figure 6-1: 923-GUI...........................................................................................................................................6-2
Figure 6-2: Connection Manager .......................................................................................................................6-3
Figure 6-3: Add a New Data Logger Configuration............................................................................................6-4
Figure 6-4: 923-GUI –Reading the Data from Flash (Internal Log) ..................................................................6-5
Figure 6-5: 923-GUI –File Read-back Function (Load Log) .............................................................................6-8
Figure 6-6: 923-GUI –Alarm Configuration.......................................................................................................6-9
Figure 6-7: 923-GUI –Time Synchronization of 923-EDL RTC’s with PC ......................................................6-10
Figure 6-8: 923-GUI –ADC Controls...............................................................................................................6-11
Figure 6-9: 923-GUI –Adjusted Analog Input..................................................................................................6-11

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
ACRONYMS AND ABBREVIATIONS
ADC
Analog to Digital Converter
CRC
Cyclic Redundancy Check
ECL
Emitter Coupled Logic (Vcc = 0V)
EIA
Electronic Industries Association
ESD
Electrostatic Discharge
ESR
Electrical Slip Ring
FORJ
Fiber Optic Rotary Joint
FPSO
Floating Production, Storage and Offloading
HUMS
Health and Usage Monitoring System
I/O
Input/output
IC
Integrated Circuit
kbps
Kilobits Per Second
LED
Light Emitting Diode
MB
Megabytes
Mbps
Megabits Per Second
NRZ
Non-Return to Zero (bit signaling format)
PCB
Printed Circuit Board
PCBA
Printed Circuit Board Assembly
PECL
Positive Emitter Coupled Logic (Vcc = +5 V)
P/N
Part Number
RPM
Revolutions Per Minute
SMT
Surface Mount Technology
SPI
Serial Peripheral Interface
TDM
Time Division Multiplexer / Multiplexing
TTL
Transistor-Transistor Logic
UART
Universal Asynchronous Receiver/Transmitter
uC
Microcontroller

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
1.0 Introduction
The Model 923 electronic data logger (923-EDL) is a compact and rugged data logging card used for product
health monitoring in marine, industrial, and other harsh environments. When installed as an option in FocalTM
systems such as electrical slip rings (ESRs) and FPSOs, it provides real-time access to diagnostic information
as well as data storage for offloading at a later time. Typically mounted at the end of a ring stack, the 923-EDL
collects data from an array of on-board sensors and stores it in nonvolatile flash memory.
The 923-EDL on-board sensors are capable of measuring temperature, relative humidity, ambient light, shock,
vibration and rotation. Logging the total number of slip ring rotations allows tracking of slip ring usage for better
planning of maintenance intervals. The environmental data collected can be used to establish baseline
operational parameters and trend monitoring can be used in a health and usage monitoring system (HUMS) to
identify potential problems before they become major faults. In addition to the on-board sensors, the 923-EDL
provides expansion connectors that can be used to interface with up to two (2) thermocouples and up to two (2)
single-ended analog channels.
Users can access on-board diagnostic information in real time via an RS-485 serial link using the sample FocalTM
graphical user interface (GUI) software (based on the Microsoft®.NET Framework), or by using custom software
configured as a Modbus RTU master device (e.g. ModScan32). A top view of the Model 923-EDL card is shown
below.
Figure 1-1: Model 923 Electronic Data Logger Card
This user’s manual and the appropriate reference documents should be reviewed prior to
installation or reconfiguration of the data logger system. Refer to system installation drawings and
Model 923 configuration drawings for specific installation details.

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
2.0 Specifications
Table 2-1: Specifications
ENVIRONMENTAL
VALUE
COMMENTS
Operating Temperature
-20°C to +70°C
Storage Temperature
-40°C to +85°C
Shock
30 g, 11 ms
Per ISO 13628-6 Q1 level
Vibration
5 g, 25 - 1000 Hz
Per ISO 13628-6 Q1 level
Humidity
5-95% RH
Non-condensing
MECHANICAL
Dimensions
3.37” [86 mm] (NOM)
External diameter
Mounting
4 x #2 screw holes
Use with #2-56 standoffs
Weight
< 40 grams
ELECTRICAL
Input Voltage
+15 to +30 VDC
+24 VDC nominal
Optional: +5 or +12 VDC (contact
factory for details)
Current Draw
0.04 A (TYP)
With 24 VDC input
Power Dissipation
1.0 W (NOM), 2.0 W (MAX)
Overvoltage Protection
36 VDC
Reverse Polarity Protection
36 VDC
Battery
3.3V lithium-Ion rechargeable
For real-time clock only
SENSORS
Temperature Sensor
-40°C to +100°C
Accuracy +/- 1 °C
Humidity Sensor
5 - 95 % RH
Light Sensor
λ =300 to 1000 nm
Wavelength range
3-axis Accelerometer
+/- 200 g
Rotation Sensor
Direction (CW, CCW), speed
(rpm) and total revolutions
Real Time Clock Accuracy
+/- 5 ppm
Logging Flash Memory Size
32 MB
14 years logging at 60 min log interval
Thermocouple
-40°C to +100°C
K-type thermocouple
4 x Analog Input
0 to +3 VDC
10 bit, 200 Hz sampling
INTERFACES
Diagnostic and control
2-wire RS-485 serial interface
with ISO ground
115.2 Kbaud, Modbus RTU

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
3.0 Product Description
The 923-EDL card provides an array of on-board sensors and interfaces for external sensors. The card is
typically installed at the factory inside FocalTM rotary products such as ESRs and FPSOs. With power applied to
the 923-EDL, sensor data is logged automatically to on-board flash memory and simultaneously available in real
time via an RS-485 serial link (J5) to a remote location. Key part locations are shown below.
REF.
DESCRIPTION (CONNECTORS)
J4
1 x 12-PIN CONN. FOR
2 x ANALOG INPUTS (SINGLE-ENDED)
J5
1 x 9-PIN MICRO-D CONNECTOR FOR
POWER AND DIAGNOSTICS (RS-485)
J6, J15
2 x 3 PIN THERMOCOUPLE INTERFACES
J3, J7,
J10
FACTORY USE ONLY
REF.
DESCRIPTION (OTHERS)
B1
3.3V LITHIUM-ION RECHARGEABLE
BATTERY
SW1,
SW2
FACTORY USE ONLY
Figure 3-1: Model 923-EDL Part Locations

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
3.1 Configuration Settings and Initial User Setup
The 923-EDL cards are configured at the factory and the user does not need perform any additional card
configuration settings to start operating the card and obtain diagnostics data.
3.1.1 Configuration Settings
Table 3-1: Factory Default Card Configuration Settings (as-built)
Name
Parameter
Default Setting
Diagnostics Port (J5) (Hardware)
Serial
Interface
RS-485
Termination
On-board 120 ohm Terminator
Enabled / Disabled
120 ohm terminator enabled (installed)
On-Board Dip Switches SW1/2 (Hardware)
SW1
Data port serial protocol
RS-485 (SW1[1:2] = ON, ON)
SW2
Data port serial protocol
RS-485 (SW2[1:2] = ON, ON)
Diagnostics (software)
Modbus
Frame Format
RTU
Node
1
Baud Rate
115,200 Baud
Supported Function Codes
Function Code 3: Read Holding Registers
Function Code 6: Write Single Holding Register
(other codes are not available)
User defined parameters via the diagnostics port:
Log interval (1 –120 minutes)
Node ID (1 - 255)

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
3.1.2 Initial User Setup
The only initial user setup requirement to start logging sensor data is to power up the 923-EDL card with
+24 VDC (nominal). In order to access real-time sensor data the user can connect to the card via the RS-485
port using the sample FocalTM GUI as shown in the figure below or a 3rd party Modbus RTU software
configured as a master.
Figure 3-2: Model 923-EDL Typical Setup Connection Using a PC and Focal GUI
3.2 Data Logging
The 923-EDL uses a proprietary logging algorithm that enables the card to compute the maximum, minimum
and average measurement of all the sensor parameters within the specified log interval. This allows the user to
select longer log intervals without losing sight of critical events within the specified log interval. The data logging
interval can be set between 1 to 120 minutes and it can be changed by the user by using Focal’s GUI software
through the data port J5.
The data obtained from the sensors is stored in the card’s on-board 32 MB flash memory. This memory size
allows up to 14 years’ worth data to be stored when the log interval is set to 60 minutes.
3.3 Real Time Clock (RTC)
The 923-EDL has an on-board a real time clock (RTC) with an accuracy of ±5 ppm. An on-board, 3.3V
rechargeable lithium-ion battery (B1) maintains the correct time even when the card is not powered for a period
of up to four months. This real time clock is used as the time stamp when logging the sensor data into on-board
flash memory. The time stamp will be reset to factory default if the battery has been drained –any data logged
to the flash memory with a dead battery will be accurate, but the time stamp will start at 01/01/2000 00:00:00
(dd/mm/yyyy hh:mm:ss).
The on-board battery is recharged while the board is powered on. Note that the battery is intended solely to
keep the RTC running, not to operate the entire data logger. Normally the RTC is operation even when there is
no power applied to the card.
Note: The RTC is normally synchronized with a PC’s clock. The factory clock used to synchronize the RTC has
a time zone of UTC-04:00 (Atlantic Time Canada) and when connecting to the card using the sample GUI, the
user will be prompted with the option to re-sync the RTC with the local PC or keep the factory default values. It
is recommended to re-synchronize the RTC at the time of final system installation.

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
3.4 On-Board Sensors
The specifications for the on-board sensors of the Model 923-EDL card are given in section 2.0 of this document.
The 923-EDL obtains a new sample from the on-board sensors every 5 ms. Note that the accuracy of the
temperature and humidity is for the sensors themselves and corresponds to the immediate vicinity of the
sensors, which may deviate from the ambient air conditions inside the rotary product.
The card starts logging data at a user-defined log interval (1 to 120 minutes) as soon as it gets powered. After
power-up the card calculates the maximum, minimum and average values read from all the sensors during the
specified log interval and then saves this data to the on-board flash memory with a time stamp from the on-board
real-time clock (RTC).
The real-time sensor data and the sensor data saved in flash can be accessed (downloaded) from the
diagnostics port (J5) using the sample GUI (P/N: 923-0403-00) or using custom software configured as Modbus
RTU master. The real-time raw data (non-formatted) of the on-board sensors is stored in Modbus registers.
Refer to section 7.0 of this document for details on how to convert Modbus sensor raw data into
analog values for all the on-board sensors.
3.4.1 Temperature and Humidity Sensor
The card uses a capacitive type humidity sensor with integrated temperature sensor. A protective cap is placed
over the sensor.
Do not expose the sensor to solvents or other corrosive liquids.
3.4.2 3-Axis Accelerometer Sensor (Shock and Vibration)
The 3-axis accelerometer provides measurements up to ±200 g. This sensor measures both dynamic
acceleration resulting from motion or shock and static acceleration, such as gravity. Shock and vibration data
obtained from this sensor are saved in the on-board flash memory and also into Modbus registers. The X, Y and
Z direction raw values are stored as 16-bit values. The shock events are logged into the flash memory as 32
data points per axis (10 data points before the event and 22 data points after the event).
3.4.3 Ambient Light Sensor
The light sensor used is capable of operating in the infrared and visible light spectrum. Illuminance (ambient
light level) in lux is derived using an empirical formula to approximate the human-eye response.
The illuminance measured is stored as a 16-bit raw value in Modbus registers for real-time diagnostics and it is
stored as formatted data (lux) in the on-board flash.
Refer to the Modbus register map section of this document for details on the formulas to obtain the lux values.
3.4.4 Rotation Sensor (Turns Counter and Speed)
The on-board rotation sensor is used to measure the direction (CW and CCW), speed (rpm) and total revolutions.
This sensor requires custom hardware and is currently intended to be used with Focal rotary products. Contact
the factory for more details.

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
3.5 Interfaces
3.5.1 Thermocouple Inputs
The 923-EDL allows two (2) K-type thermocouples to be connected to 3 pin connectors J6 and J15. The card
performs cold-junction compensation and the data output of each thermocouple is saved as an IEEE-754 32-bit
floating point value in Modbus registers and also saved in the on-board flash memory.
3.5.2 Analog Inputs
The 923-EDL provides access to two (2) single-ended analog inputs via the 12-pin connector J4. The default
input voltage range is dependent on a factory configurable resistor divider for each channel. The default
configuration yields a maximum input on channel 1 of 14.76V. The maximum input on channel 2 is 4.95V.
The resolution of the ADC is 10-bit and the data is sampled at 200 Hz. Each ADC channel is calibrated at the
factory using a scale factor (saved as an IEEE-754 32-bit floating point). The data output of each ADC and the
scaler is stored in Modbus registers and in the on-board flash memory.
Applying higher voltages to the analog channels could damage the analog input circuits.

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
4.0 Hardware
The Model 923-EDL card has a 923-0203-00 PCB assembly (PCBA). The PCBA has an external diameter of
3.37” [8.55 cm] (nom) and an internal diameter of 1.43” [3.63 cm] (nom). The card assembly is typically installed
on FocalTM rotary products such as electrical slip rings (ESRs) and FPSOs.
This PCBA is designed for interfacing with a 9-pin Micro-D connector, which is used to provide power to the card
and access real-time and stored diagnostics information.
Top and side views of the Model 923-EDL PCBA are shown in the figure below. For more details, refer to
configuration drawing 923-2004-00.
Figure 4-1: Model 923-EDL PCBA
4.1 General Board Handling
The PCBA does not require forced air convective cooling. Generally heat from the card is conducted through
the mounting hardware.
Care must always be taken during the handling of PCBAs to ensure product integrity. The following guidelines
should be adhered to in working with PCBAs:
Always handle boards by the edges and do not touch any connectors or gold tabs.
Handle boards at an ESD safe workstation with a clean surface.
Never stack PCB assemblies on top of one another.
Do not flex boards during handling or when mounted. The mounting surface needs to be flat and even
such that the board is not flexed when bolted down.
Do not cause unnecessary shock and vibration, such as dropping or rough handling of the boards.
Do not expose light, temperature and humidity sensors to solvents or other corrosive liquids.

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
5.0 Electrical Connectors and Pin Descriptions
The 923-EDL card has three (3) connectors for customer access and a few others for factory programming and
testing. A 9-pin Micro-D connector (J5) on the top side of the card provides access to the diagnostics data and
is also used to power-up the board. Two three pin connectors (J6, J15) provide access to two thermocouple
inputs, and a 12-pin receptacle (J4) provides access to two analog inputs.
Table 5-1: Connector/Mating Connector Part Numbers
Ref
Description
Manufacturer
Manufacturer
Part Number
Mating Manufacturer
Part Number
J5
9-Pin Micro-D
Molex
0836119006
ITT Cannon, MDM-9SSB, Micro-D,9-Pin, female
J4
12-Pin Rcpt. 0.100”
Samtec
CES-106-01-S-D
TSW-106-07-T-D
5.1 9-pin Micro-D Power and Data Connector (J5)
Pin locations and functions are shown below for the 9-pin Micro-D connector.
Figure 5-1: Micro-D (9-pin) Power & Data
Connector (J5)
Table 5-2: Micro-D (9-pin) Connector (J5) Pin out
Pin
Function
1
RS-485+
2
RS-485-
3
ISO GND (for RS-485)
4
RESERVED
5
RESERVED
6
POWER
7
GND
8
RESERVED
9
RESERVED
5.2 Thermocouple Input Connectors (J6, J15)
The connectors used for thermocouple connections are shown below. The 3 holes have 0.100” spacing and the
pinout described below. Thermocouple input 1 is connected to J6 and Thermocouple input 2 is connected to
J15.
Figure 5-2: Thermocouple Input Connectors (J6, J15)
Table 5-3: Thermocouple Input
(3-pin) Connector (J6, J15)
Pinout
Pin
Function
1
Thermocouple T+
2
Thermocouple T-
3
Ground
Note: For K-type thermocouples
T+ is the yellow wire
T- is the red wire

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
5.3 12-Pin Analog Input Connector (J4)
Figure 5-3: 12-pin Analog Input Connector (J4)
Table 5-4: Analog Input (12-pin) Connector (J4)
Pin out
Pin
Function
1
OPEN (DEFAULT)
OPTIONAL: +12VOUT OR +5VOUT (WITH HW MODS)
2
ANALOG INPUT CH1
3
GND
4
OPEN
OPTIONAL: +12VOUT OR +5VOUT (WITH HW MODS)
(DEFAULT +5V)
5
ANALOG INPUT CH2
6
GND
7
GND
8
RESERVED
9
OPEN (DEFAULT)
OPTIONAL: +12VOUT OR +5VOUT (WITH HW MODS)
10
GND
11
RESERVED
12
OPEN (DEFAULT)
OPTIONAL: +12VOUT OR +5VOUT (WITH HW MODS)

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
6.0 Functionality
The main function of the Model 923-EDL card is to collect data from several on-board sensors and external
interfaces and store it in the on-board non-volatile flash memory. The data collected can then be used for further
analysis and evaluation of the environment in which the card is installed. The data stored in flash memory is
saved as analog values and further processing is not required to convert raw sensor data into analog values, as
this task is performed by the on-board microcontroller.
The Model 923 also supports in-field programming via the J5 port, which can be used for future firmware
upgrades.
6.1 Serial Diagnostic Interface
Remotely accessible, real-time diagnostic data and status information is available from the 923-EDL via the port
J5. This information can be used to determine current health and to analyze long-term trending of critical
parameters of the system being monitored (e.g. to estimate the remaining life of a Focal rotary product).
Diagnostic and status information is retrieved from the following:
1. Temperature, humidity, accelerometer, ambient light and rotation sensors (details of these sensors are
provided in section 3.4).
2. A bank of analog to digital converters (ADCs), which monitor board voltage rails.
3. Board information which includes serial number (S/N), data code, assembly number, firmware version,
cause of reset and I2C error count.
4. On-board Flash memory information such as memory usage and current write pointer location.
The serial RS-485 interface (connector J5) of the 923-EDL operates in Modbus RTU mode.
6.1.1 Modbus RTU
The user can communicate with the 923-EDL using the Modbus RTU protocol over the serial RS-485 interface
(J5). The default (as-built) settings are shown in the table below.
Table 6-1: Modbus RTU Frame Format and 923-EDL Defaults
Name
Length
(bits)
Function
Default Settings
(923-EDL as-built)
Start
28
At least 3.5 character times of silence
(mark condition)
28 bits min.
Address
8
Station (node) address
Node 1
Function
8
Indicates the function code
Function Code 3: Read Holding Registers
Function Code 6: Write Single Holding
Register
(other codes are not available)
Data
n * 8
Data + length will be filled depending
on the message type
All Modbus registers are 16-bit values
CRC
16
Cyclic Redundancy Check
CRC-16-ANSI (a.k.a. CRC-16-IBM)
End
28
At least 3.5 character times of silence
between frames
28 bits min.
Note: The default node address can be changed using the sample GUI.

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A Moog Inc. Company Document No: 923-0603-01, Rev. 2
6.2 Diagnostics Software
6.2.1 Overview
Focal-Moog has created a sample .NET graphical user interface (GUI) to work with the 923-EDL in Modbus RTU
mode. The 923-GUI (P/N: 923-0403-00) uses a serial connection to retrieve data from the 923-EDL using the
Modbus RTU protocol. The GUI presents all data readings on a single window, as shown in the figure below.
Live graphs of temperature, humidity, ambient light, rotational speed, etc., are provided as well as live readings
from all sensors. Additional board identification information, such as card serial number, date code, etc., is also
included.
Note: The GUI screenshots shown in this document might be updated from time-to-time to reflect new
features or information added to the software. Contact the factory to obtain the latest version of the GUI.
Figure 6-1: 923-GUI

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6.2.2 Installation
System Requirements
PC with Intel Pentium or AMD processor
256 MB of RAM
20 MB of available hard disk space for the application and documentation.
Supported Operating Systems: Windows 7 (64-bit)
.NET Framework (minimum version 4.0)
CD-ROM or DVD drive or USB port (to download the GUI)
PC with an available RS-485 serial COM port. Note: A USB-to-RS-485 converter might be used.
Installation Procedure
1. Copy the contents of the GUI folder to a local folder in your PC.
2. For example: C:\Focal\Model923\GUI\Release
3. Open the “Release” folder.
4. Double click on the executable *.exe file to run the Model 923 Diagnostic Software.
6.2.3 Application Usage
In order to establish a successful diagnostics connection with the 923-EDL, the card must be powered on
(typically with +24V at connector J5) and the physical data communication link must be valid (also via the J5
connector). The connection between the PC and the card’s J5 port is via an RS-485 serial link. If the PC does
not have an RS-485 port, then an external converter can be used (e.g. a USB-to-RS-485 converter). The list of
available serial ports and their descriptions can be found by opening the PC’s device manager (e.g. WIN+R (run)
devmgmt.msc).
6.2.3.1 Connection Manager
The communication parameters for each card must be configured using the Connection Manager. To remove a
card configuration from the list, click the “X” button on the right of the card name. The Pen symbol can be clicked
to edit the existing card configuration.
Figure 6-2: Connection Manager

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6.2.3.2 Add a New Data Logger Configuration
To add a new card configuration to the list:
1. Click the button at the far left of the Connection Manager.
2. Enter a Description, Serial Port, Modbus Node and Refresh Interval for the new card, as depicted in the
figure below.
3. Click “Save Configuration”.
Figure 6-3: Add a New Data Logger Configuration
Notes:
1. It is recommended to set the “refresh interval” to >= 1000 ms.
2. The default node is 1.
6.2.3.3 Connect and Disconnect Diagnostic Communications
Click to begin retrieving data from the card.
Click to disconnect from the card.
Note:
If on start up a configuration tab is already open, the configuration shown corresponds to the last configuration
used. This configuration may not apply for the current system. This could result in connection failures to the
923-EDL. It is recommended that on start-up, any existing and unknown configuration tabs are closed and new
configurations are added or ensure the same configuration is always used.

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6.2.4 Special Features
6.2.4.1 Log Download
The GUI gives the user the ability to offload all the data on the 923-EDL into a .csv file. The time taken for the
data offload is dependent on the amount of flash memory used on the 923-EDL. An estimated time for offload
is given for user convenience. A valid serial connection with the 923-EDL is required for this feature. Controls
for this feature can be seen in the image below.
Figure 6-4: 923-GUI –Reading the Data from Flash (Internal Log)
Select location to save the file
Begin download of internal flash