Tension Sensing System

& FG7C LCD Platform

Installation Guide

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 Table of Contents

Introduction & company profile …………………………………………………………. 3

Guarantee ……………………………………………………………………………………….. 4

Nemtek Group outlets …………………………………………………………………………5

Introduction to the Tension Sensing System .………………………………………. 6

Purpose of the Tension Sensing System ….………………………………………….. 7

Opening the FG7 ………..…………………………………………………………………….. 8

Hardware ……………………………………………………………………………………… 9-11

Display Board ………………………………………………………………………………. 12-13

Communication ……………………………………………………………………………. 14-15

Communication wiring ………………………………………………………………………. 16

Programming the FG7C-TW …………………………………………………………… 17-21

Tension Sensors Parameters ……………….…………………………………………….. 22

Programming the Tension sensors ……………………………………………………… 23

Routine Maintenance ……………………………………….……………………………….. 24

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 Introduction & company profile

INTRODUCTION

Thank you for choosing our product! The NEMTEK Tension Sensing system and FG7C LCD
Platform is designed and manufactured to provide many years of reliable use, if installed and
maintained correctly. The guidelines provided in this manual will assist you with the basic
operation and maintenance of your Taut-Wire System.

Currently this product is designed and manufactured in South Africa for the South African and
international markets. More information on our products and general information are available
on our web site at: http://www.nemtek.com.

COMPANY PROFILE

The NEMTEK Group of Companies manufacture and distribute intelligent electronic agricultural
fencing systems, security and perimeter control systems and have been involved in the security
industry since 1990.

We have our own research and development team, designing and manufacturing a full range of
globally competitive electric fence energizers and related products.

NEMTEK is continually updating its products according to South African and international
standards in order to ensure the highest quality products and continuous customer satisfaction.

Electric fencing can be lethal. Avoid head contact with the fence. When installing please take
careful note of the options available for current limiting resistors, the programmable output
energy levels as well as the low-voltage operation of the energizer.

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 Guarantee

GUARANTEE
The Tension Sensing System and FG7 LCD Platform, manufactured by IO Tech Manufacturing
(Pty) Ltd, is guaranteed for a period of two years from date of sale against defects due to faulty
workmanship or materials.

IO Tech Manufacturing (Pty) Ltd will, at its discretion, either repair or replace a product that
proves to be defective.

IO Tech Manufacturing (Pty) Ltd guarantees that the product, when properly installed and used
in line with the specification as determined by IO Tech Manufacturing (Pty) Ltd from time to
time, will execute its function of generating a suitable potential. IO Tech Manufacturing (Pty)
Ltd does not guarantee that the operation of the product will be uninterrupted and totally error
free. Faulty units must be returned to one of the Nemtek Group outlets. The buyer shall pay all
shipping and other charges for the return of the product to Nemtek or Nemtek Security
Warehouse.

LIMITATION OF GUARANTEE
The guarantee does not apply to defects resulting from acts of God, modifications made by the
buyer or any third party, misuse, neglect, abuse, accident and mishandling.

EXCLUSIVE REMEDIES
The remedies provided herein are IO Tech Manufacturing (Pty) Ltd.’s sole liability and the
buyer’s sole and exclusive remedies for breach of guarantee. IO Tech Manufacturing (Pty) Ltd
shall not be liable for any special, incidental, consequential, direct or indirect damages, whether
based on contact, tort, or any other legal theory. The foregoing guarantee is in lieu of any and
all other guarantees, whether expressed, implied, or statutory, including but not limited to
warranties of merchantability and suitability for a particular purpose.

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 Nemtek Group outlets

HEAD OFFICE
Tel: +27 (0)11 462 8283 Northriding Commercial Park
Fax: +27 (0)11 462 7132 Stand 251, Aintree Street, Northriding
Randburg, South Africa
EXPORTS
Tel: +27 (0)11 462 8283 exports@nemtek.com
Fax: +27 (0)11 462 7132

EDENVALE
Tel: +27 (0)11 453 1970 Unit 4, Meadowdale Park
Fax: +27 (0)11 453 1858 Cnr. Dick Kemp & Herman Roads
Meadowdale, Edenvale, South Africa
CAPE TOWN
Tel: +27 (0)21 386-3742 27B Concord Crescent, Airport City
Fax: +27 (0)21 386-5573 Cape Town, South Africa

NELSPRUIT
Tel: +27 (0)13 752-2187 Waterval Ave, Riverside Industrial
Fax: +27 (0)13 752-2188 Nelspruit, South Africa

KWAZULU-NATAL
Tel: +27 (0)31 701-2125 19 Henwood Road
Fax: +27 (0)31 701-2125 Pinetown, South Africa

AUSTRALIA
Tel: (08) 9303 9855 Unit 5, 19 Innovation Circuit,
Email: nemtek@bigpond.net.au Wangara, 6065, Perth, WA, Australia

Website: www.nemtek.com
E-mail: nemtek@nemtek.com

Manufactured in South Africa

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 Introduction to the Tension Sensing System

The Nemtek FG7C LCD platform is used for providing a graphical interface and connectivity to a
network of Nemtek Energizers and Input/Output Cards
(IO Cards) and Tension Sensors.

The platform may be configured with different internal printed circuit boards and software to
provide the required functionality.

Warning:
Test the functionality of the system after configuration and before commissioning.

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 Purpose of the Tension Sensing System

The purpose of the Tension Sensing System is to provide another layer of perimeter security
that is independent of any other security system. It provides a means of detecting any change
in tension on a wire by using Tension sensor/s. An on-screen image of the perimeter is
displayed. Lines are drawn on the image to represent each of the sectors that are being
monitored. Up to 31 sensors may be used. Any sensor may be associated with any sector and
any number of sensors can be used per sector.

Under normal operation each sector will be shown as a green line. Should any sensor assigned
to that sector be deflected the line will change colour to red. The sensor will remain in alarm
condition for a minimum of ten seconds. The “Active Alarms:” indicator will revert to green. If
an appropriate personal identification number (PIN) is entered, the “Clr” button can be pressed
and the alarm indication will be reset. Both the PIN activation and alarm event will be recorded
in the system log.

Users 1 to 3 may only reset the alarm indication on the screen.

The Administrator is able change PIN details, view the logs, and download the logs to a USB
stick. The Installer, in addition to the Administrator permissions, can do firmware upgrades,
assign sectors and TW sensors to sectors, the number of sensors on the system, and adjust the
parameters of each TW sensor.

Each TW sensor has a unique address that can be configured by the Installer. Operational
parameters of each TW sensor can be altered by the Installer. This allows each sensor to have
unique sensing capabilities. However, the default values are normally adequate. These
configuration settings can be done from the FG7C screen.

If a Nemtek Network IO card is attached to the FG7C, Sector 1 will activate Relay 1 on the card,
Sector 2 will activate Relay 2 etc. up to four sectors. Relay 5 will activate on any alarm condition
of any of the four sectors. When the alarm condition(s) no longer persists, and the “Clr” button
is pressed, the associated relay(s) will be reset.

If more than four sectors are envisaged, a second or more relay cards can be added to indicate
the alarm conditions. Alternatively the data corresponding to each sensor can be accessed via
the TCP protocol.

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 Opening the FG7C

Panel mount type

On one of the long sides of the FG7C are two slots. Insert a 6.5mm screw driver into
one of the slots and turn the screw driver until the lid with the display pops up on that
side. Now repeat this with the other slot. You should now be able to carefully remove
the lid.

Wall mount type

On one of the long sides of the FG7C are two openings with retaining clips. Insert a
6.5mm screw driver into the bottom part of one of the openings and push the retainer
clip back until the lid with the display pops up on that side. Now repeat this with the
other opening. You should now be able to carefully remove the lid.

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 Hardware

HARDWARE

The lid of the FG7C contains a green printed circuit board IOT1711JM and a dark blue control
unit as well as the touch screen.
The IOT1711JM board is responsible for generating the supply voltage for the control unit as
well as the display. The board also monitors and process the different communication signals
before sending the information to the control unit.
Under the dark blue control unit is the battery which is required for the clock during power
failures.
You will find jumpers, connectors and led’s on the board for selecting, connecting and
indicating. The control unit host the software and has all communication ports on board.
The touchscreen is the standard display used on the stand-alone units, without Druid
FenceProbe or third party software.

In the base of the FG7C a communication board has to be installed, there are two
communication boards available.

The FG7C communication board with Nemlink/Taut wire

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 Hardware

The FG7C communication board with RS485/Taut wire/TTL

INSTALLING THE COMMUNICATION BOARD

The communication board should be mounted in the bottom of the base of the FG7C with
the screws supplied with the board. The terminals on the board should be facing inwards
once mounted.
After mounting, the ribbon cables of the display board should be connected to the two
white terminals on the communication board (con1 and con2)

INSTALLING THE WALL MOUNT FG7C

The base of the FG7C has several counter sunk mounting holes at bottom of the unit, these
can be used to mount the unit on a wall with 4mm screws. The holes are spaced 100 x100
mm or 75 x 75 mm so that the unit can also be mounted at the back of HD monitor if so
required.

Cable entries are available by means of a pushout at the bottom of the base or two cut outs
on the side of the base.

INSTALLING THE PANEL MOUNT FG7C

The panel mount FG7C is designed to be mounted flush in wooden walls or dry walling. A
cut out has to be made in these walls of 195mm x 130 mm.
Before installing the base of the FG7C into the wall make sure that all cut outs required for
the wiring are done on the base, that the wiring to the FG7C is fully tested and that the
communication board is installed.
The base is supplied with two wing clamps (see picture), make sure that they are positioned
in their base cavities. Place the base into the opening in the wall making sure that the
cabling will not get in the way of the wing clamps. Turn the top wing clamp screw a quarter
turn anti clockwise before turning it clockwise until the clamp is tight. Repeat this for the
bottom clamp. The base should now be securely clamped into the wall. Before closing the
lid ensure that all programming and all wiring to the control board and communication
board is completed.

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 Hardware

If removal of the base is required then first remove the lid from the base and disconnect the
wiring between the lid and the base, so that it can be fully removed. Turn the top wing
clamp screw anti clockwise until the wing clamp comes back into its base cavity (do not fully
unscrew the wing clamp screw since it will detach and can fall inside the wall). Repeat for
the bottom wing clamp and remove the base from the wall opening.

Wing clamp and Wing clamp screw

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 FG7C CONTROLLER: THE DISPLAY BOARD

THE DISPLAY BOARD

JUMPER SETTINGS DISPLAY BOARD

Jumper setting as viewed with connectors at the bottom.

Watch Dog timer 1 JP1 (1) Positioned to the left for auto reset of the power supply
with transmission failure of the control unit
Positioned to the right for no auto reset of the power
supply
Watch Dog timer 2 JP3 (1) Positioned to the left for auto reset with transmission
failure of the control unit
Positioned to the right for no auto reset of the control unit

PUSH BUTTONS ON DISPLAY BOARD

There are two push buttons on the green board. The one is marked SW2 “5V_RESET” and
the other SW1 “B3_RESET”. The 5V_RESET button is used to manually power the control
unit on and off, this is usually required when programming the settings on the FG7C. The
B3 RESET button is used to manually reset the FG7C control unit.

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FG7C CONTROLLER: THE DISPLAY BOARD

LED’S ON DISPLAY BOARD

LED1 Shows that the FG7C is On

LED2 5V supply indicator
LED3 When flashing, indicates that the watchdog timer is operational
LED4 Not in use

CONNECTORS

Con 1 Ribbon cable connection to Con1 of communication board

Con 2 Ribbon cable connection to Con2 of communication board
Con 3 Not in use

USB PORT

The USB port is used for downloading logs and can also be used for a mouse, so that a
pointer can be used on the touch screen display.

HDMI PORT

The HDMI port is a standard micro-HDMI connector. The HDMI port can be activated via
the web interface (see the FG7 web interface). A USB mouse connected to the USB port
of the FG7 should be used for operating the system when using an HDMI display or the
USB port can be used for the touch screen part of a touch screen monitor. The resolution
of the display if possible should be set to 1920 x 1080. The picture of the site image
should be 1000 x 650 pixels.

ETHERNET PORT

The Ethernet port is used for communication with a computer loaded with Druid
FenceProbe or third party software and it is also used for connecting to the web interface
of the FG7.

Note:
The control unit hosts the software and gives outputs via the touch screen, HDMI,
Ethernet or USB port. All other ports should not be used by the installer.

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 FG7C CONTROLLER: COMMUNICATION
BOARDS

THE NEMLINK/TAUT WIRE COMMUNICATION BOARD

JUMPER SETTINGS COMMUNICATION BOARD

Jumper setting as viewed with connectors at the bottom.

Nemlink programming JP3 (1) Down to enable programming of the Nemlink

Up standard operational mode

LED’S ON COMMUNICATION BOARD

LED1 If flashing, indicates receiving of data from the Nemlink to the

control unit.
LED2 If flashing, indicates transmission of data from the control unit to
the Nemlink
LED3 If flashing, indicates receiving of data from the taut wire to the
control unit
LED4 If flashing, indicates transmission of data from the control unit to
the taut wire
LED5 5V supply indicator

CONNECTORS

Con 1 Ribbon cable connection to Con1 of display board

Con 2 Ribbon cable connection to Con2 of display board
Con 3 Ethernet port for connection to data network
J1 Two way connector for 12Vdc supply
J6 Three way connector for connection to the taut wire system

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FG7C CONTROLLER: COMMUNICATION

THE RS485/TAUTWIRE/TTL COMMUNICATION BOARD

JUMPER SETTINGS COMMUNICATION BOARD

Jumper setting as viewed with connectors at the bottom.

TTL Serial JP1 (2) Down if serial TTL is selected (For Nemlink communication)
Up if RS 485 or RS 232 communication is required

Line Bias JP3 (2) Up to have line bias (star configurations)

Down for no line bias (daisy chain configuration)

LED’S ON COMMUNICATION BOARD

LED1 If flashing, indicates transmission of data from RS485 or TTL lines

to the control unit.
LED2 If flashing, indicates receiving of data from the control unit to the
RS 485 or TTL lines
LED3 If flashing, indicates receiving of data from the taut wire to the
control unit
LED4 If flashing, indicates transmission of data from the control unit to
the taut wire
CONNECTORS
Con 1 Ribbon cable connection to Con1 of display board
Con 2 Ribbon cable connection to Con2 of display board
J1 Two way connector for 12Vdc supply
J2 Four way connector for TTL connection to a Nemlink card
J3 Four way connector for TTL connection
J4 Three way connector for RS 485 (out)
J5 Three way connector for RS 485 (in)
J6 Three way connector for connection to the taut wire system

The connectors on the communication board are self-explanatory. However, if

communication will be made through a separate NemLink card, then the connector J2 should
be used (jumper selection TTL Serial). Also note that the FG7-Druid does not support RS485
multidrop, only daisy chain, so there are RS485 OUT and RS485 IN terminals. The TAUT
Wire terminal is not used in the FG7 Druid controller but only with FG7 Taut wire controllers.

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 Communication and wiring

1. Tension- Sensors

Electrical Connection:

The TS sensors sometimes TW (Taut-wire) sensors are connected via a three wire interface
plus shield that is responsible for power as well as bi-directional communications. The wiring
can be multidropped, i.e. three wires from the FG7 to the first sensor and then onto the
second sensor etc.

• The red wire of the sensor goes to “supply” on the Taut-wire connector of the
FG7C communication board.
• The green wire of the sensor goes to “comms” on the Taut-wire connector of the
FG7C communication board.
• The blue wire together with the screen goes to the “GND” on the Taut-wire
connector of the FG7C communication board.

Caveat: if the wiring diameter is too small, or the distance is too far, then the wire
resistance will be too high and some sensors will not operate. Ideally the wiring will form a
loop back to the FG7. This helps with power reticulation to the sensors and allows for twice
the distance.

Mechanical Connection:

Ideally a tension sensor is mounted in the middle of a linear span of wire. The maximum
span is 100m and the wire must be free to move in a horizontal direction. Tension sensors
operate effectively when there is no residual deflection of the sensor. The wire should be
installed and tensioned, but not clamped at the tension sensor. All wires should be installed
and tensioned in a given sector before the tension sensor is clamped onto the wire

2. Nemtek IO Network Card

A Nemtek IO Network card can be connected to the FG7. The Nemtek Network card must
have all its address jumpers inserted. Communication with the Network IO card can be via
RS232 from the FG7, via some media converter, to RS422 and the Network card or
alternatively via the RS 485 terminals (RS 422) on the FG7 direct to data terminals on the
Network IO card. (Obviously, from RS422 media converter/s and back to RS422 is also
acceptable. Fibre-optic cable is the preferred media).
An Ethernet connection could also be made between the FG7 and the IO card with the use
of the Nemtek Nemlink and Nemlink IO card.

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 Programming the FG7C-TW

PROGRAMMING THE FG7C-TW

The FG7B-TW should be programmed with the number of Taut-wire (tension) sensors.
If required a graphic site image can be loaded on the FG7C-TW and zones (sectors) can be
drawn on the image.

CONFIGURE THE NUMBER OF SENSORS ON THE

NETWORK

1) On the FG7, press the PIN tab on the top screen and select▼ Installer, enter the
appropriate PIN number and press Enter. Check that Installer stays on the screen
and has not revert back to select.
2) Press the Image tab, followed by the System tab on the top of the screen and use
the ▼ and ▲ markers next to the No. of TW Sensors to select the correct number
of sensors in the network.
Press Save No of TW sensors.
3) If jumper 4 and 6 are set to auto reset (normal operation), then after about two
minutes the application will restart. Otherwise one can push the B3-PWR button and
this will close the application and after the Nemtek logo has disappeared from the
screen you press the B3-PWR button again to restart the unit.
4) Check under the System tab that the number of sensors is now correct.

CONFIGURE THE IO CARD ON THE NETWORK

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 Programming the FG7C-TW

JUMPER SETTINGS:

JP 1 Data Pass Through set to No

JP2 Daisy/Multidrop set to Daisy
JP3 Not Used
JP4/JP5/JP6 Config & Address set all in except D out
JP8/JP9 Not Used
JP7/JP10/JP11/JP/JP12/JP13 Wet/Dry contacts set for customer requirements

AUDIBLE ALARM

Under the System Tab you can select for the FG7 giving an audible alarm when there is an
alarm or service condition on the energizers by clicking on the word audible next to the
audible tick box.

FACTORY DEFAULT

Under the System Tab you can reset the FG7 to Factory default settings by pressing the
default button the IP address will be reset to 10.0.0.20 and all pin setting will default back
to the numbers as stated in the user manual.

LOADING A GRAPHIC SITE IMAGE

1) Get a suitable image of your site and scale the image to about 370 x 370 pixels. Call
the image: image13r370 and save the image in a .png format.
2) The graphic site image has to be loaded via the FG7 web interface (see the FG7
web interface).

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 Programming the FG7C-TW

DRAWING SECTOR LINES AND ALLOCATING

SENSORS TO SECTORS

1. On the FG7 press the PIN tab on the top of the screen and “Select▼”
"Installer". Type in the appropriate PIN number and press "ENTER".
2. Press the “Image” tab on the top of the screen.
3. Use the “▲” and “▼” keys under the "Sector#" label to select the desired
sector. The maximum number of sectors is equal to the maximum number of TW
sensors in the system. The absolute maximum is 31 TW sensors. See TW
Installation Notes.
4. Press “Start” and touch the screen at the desired points corresponding to that
sector. Once the last point is reached press “Stop”. A maximum of eight points is
permissible but typically only two will be used. Press “View” to see what your
sector looks like. If unhappy with the result, simply press “Start” and repeat the
exercise.
5. You can randomly do all the sectors repeating the steps 3 and 4 above.
6. You may arbitrarily assign any TW Sensor number to any perimeter Sector.
Therefore you may choose to have only one Sector with all the TW sensors, or
only one TW Sensor per Sector, or for example, 4 Sectors with three TW Sensors
on each sector. It is the responsibility of the installer to do the allocation of any
TW Sensor to any Sector. Select the appropriate Sector by using the “▲” and
“▼” keys under the "Sector#" label. Select the appropriate TW Sensor by using
the “▲” and “▼” keys under the “TW#” label. Press the “+TW” button. If more
than one TW Sensor is associated with that same Sector, then select the next
appropriate TW Sensor number and press the “+TW” button again.
7. The installer must press “Save” when you have done all your allocations. Failure
to do so will result in a loss of all the information on a reset or power down.
8. The system will automatically load this graphical layout on power-up.
9. You may, after entering Installer mode, edit any individual Sector and/or
TW Sensor at any time and re-save.
10. The labels "Sector1" etc. are placed automatically at the start of each Sector on
the graphical image. These labels are at a fixed position at the start of the
Sector.

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 Programming the FG7C-TW

SETTING THE IP ADDRESS

1) On the FG7, press the PIN tab on the top screen and select▼ Installer, enter the
appropriate PIN number and press enter. Check that Installer stays on the screen
and has not revert back to select.
2) Press the “Image” tab on the top of the screen.
3) Press the NET tab on the top of the screen and use the ▼ and ▲ markers next to
the address boxes to set the correct IP address, Network Mask and Gateway
address.
4) Press the Set IP Address button on the bottom of the screen and the new IP
address will be programmed into the FG7.
5) To ensure that the setting is correct ping the new IP address from a computer.

FIRMWARE UPGRADE

A firmware upgrade file called tautwiree can be loaded through the web interface (see the
FG7 web interface). The latest version should be available from Nemtek or one of its
distributors.

THE FG7 WEB INTERFACE

The FG7 has a web interface which can be used for:

1) Viewing mapping files loaded in the FG7
2) Uploading new mapping files
3) Uploading new site images
4) Switching between LCD touchscreen and HDMI display
5) Up loading new program files

To use the web interface you will need the IP address of the control unit in the FG7 which is
displayed under the NET tab in the FG7 as well as the installer pass word and a computer
set to the correct IP range for the IP address of the control unit.

FG7C CONTROLLER Document

CONNECTING TO THE WEB INTERFACE

1) Open the FG7 and connect a network cable from the computer to the network
connector on the control board inside the FG7.
2) Open the internet browser on the computer and enter on the address bar the IP
address which is displayed under the NET tab of the FG7 (make sure the that the
computers IP range is suitable for this IP address)
3) The FG7 configuration screen should now show on the computer

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 Programming the FG7C-TW

LOADING OF FILES

To load files through the web interface enter on the address bar in the browser the IP
address followed by /nemupload.cgi.
As an example with the IP address of the control unit being 10.0.0.20 one would enter in
the browser 10.0.0.20/nemupload.cgi
The FG7 installer configuration screen will appear on the computer screen.

1) Enter the installer password and a new screen will appear

2) Under select a file use the browse button to find the required file on the computer.
Be aware that not always all files are shown, to see all files select the custom tab
on the bottom right of the screen and then select all files.
You can only load guf5e files for firmware updates, image13r370.png files for site
images and the mapping files itoemap.txt or etoimapplus.txt
3) Once the file is selected you have two options:
Press “Get File” and re-enter the installer password and the selected file will be
down loaded into the FG7 or
Click on “View File Only” and press “Get File”. In this case the file chosen will be
displayed on the computer screen but not downloaded to the FG7. If you are
satisfied with the file, press the back button on your browser un-tick the “View File
Only” and press the “Get File”. Enter the installer password and the file will be
uploaded to the FG7.
4) After the file is loaded one has to reset the FG7 and this can be accomplished by
pressing “Reset FG7 and Use Files”. The FG7 will reset and after restarting ready
for use.

LCD TOUCHSCREEN OR HDMI

Through the web interface one can change the LCD touchscreen display to an HDMI display
or vice versa.
1) Enter on the address bar of the browser after the IP address /nemupload.cgi.
As an example with the IP address of the control unit being 10.0.0.20 one would
enter in the browser 10.0.0.20/nemupload.cgi
2) Enter the installer password
The installer configuration screen will appear.
3) Click on HDMI or LCD screen as required. The display will change to HDMI or LCD
touchscreen. A computer mouse or HDMI Touch screen should be used if HDMI is
selected

ENERG APP / TW APP / TWNODE APP

ENERG APP / TW APP / TWNODE APP
It is possible to toggle the application in the FG7 through the web interface. The FG7
should have been set for the use with Tension sensors (TW APP) but by clicking on ENERG
APP or TWNODE APP it can set for a different application.

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 Tension Sensor Parameters

Individual Tension Sensor Parameters:

Each TW Sensor has its own unique address 0-31 that can be programmed. Address 0 is
reserved for un-programmed sensors.

Each TW Sensor has its own micro-controller that has certain parameters that may be set
by the installer. In reality a perimeter wire is a very dynamic entity subjected to many
physical elements, wind, rain, temperature fluctuations, fencing posts that gradually move,
or a kid’s soccer ball being kicked into the fence. By having built-in intelligence into each
sensor the number of false alarms and maintenance requirements can be dramatically
reduced. However, under normal operation the default settings will be adequate. If need
be, the response of the TW sensor can be tailored for unique circumstances.

The “TW#” tab gives an installer access to the sensor parameters. Note, when on this TW#
screen, the FG7 will only communicate with one specific sensor. All other sensors are
ignored and no alarm conditions will occur. As soon as the tab is changed, or the system
times out, all sensors will be communicated with.

TW Sensor#: the number of the sensor being interrogated or the desired address
of the sensor to be programmed.
Alarm Trig: “alarm trip threshold” 1 - 255. The lower the value, the more
sensitive the TW Sensor. Default 50.
Filter Aver: “frequency response and alarm rate adjustment” 1 - 100.
Technically: 100/(Filter Aver) = number of alarm decisions per
second. Default 49 => 2 decisions per second.
This is neither a harmonic of 50 or 60 Hz.

Once any of the listed parameters have been changed, apart from the address, press the
“ZeroPWM” for the sensor to be updated with the new parameters. Change the sensor
address and then revert to the previous address and your new parameters will be displayed
in the “Alarm Trig: …” values.

The above settings do not work independently. If you need to experiment, change one
setting at a time. Be realistic and allow this remarkable sensor to “track” what is happening
on your fence.

The TW Sensor, once triggered, will maintain its alarm state for ten seconds. This will be
displayed in the “Active Alarm:” label on the LHS of the screen. It will be logged, and the
associated sector will change colour on the “Image” screen.

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 Programming the Tension sensors

How to set a sensor address:

You can only assign a sensor address, apart from the address zero, for a sensor with an
address of zero that is in an alarm condition. This enables you to wire all the new sensors
with default address zero on the TW communication bus and start programming.

1. New Sensor with a default address of zero: Change the TW Sensor# with
the ▲ or ▼ buttons to the desired sensor address (even if the desired address is 1,
you must change it to another value and back to 1 again). Sensor addresses must
start at 1 and be contiguous. Deflect the sensor slightly, and within ten seconds
press the “SetAddr” button on the FG7. The sensor must be in alarm before its
address can be programmed. Change the TW Sensor# address to some other
value and then back to your chosen value. The PWM: Strain: and SetP: bar
graphs should be near midpoint. The sensor has been successfully programmed. A
slight deflection on the sensor should be indicated by a change in the Strain: bar
graph. Default factory sensor parameters will be initiated.

Repeat with new sensors and different sensor addresses.

2. Revert a sensor address to zero: Change the TW Sensor# address to the

address of the sensor that must be changed. Press “RstAddr”. This sensor will now
have the address zero. (Firmware Issue: even once the address is set to zero, the
bar graphs will be deflected. When the FG7 is powered down and up again it will be
apparent that this old address is no longer valid).

The sensor can now be re-assigned a new address by following the steps in 1
above.

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 Routine Maintenance

Routine Maintenance

TW sensors will be attached to sectors of wire whose tension will change over time. If a TW
sensor is being constantly deflected it will attempt to cancel that deflection by an internally
generated electronic signal. It can only do this up to a point. At this point a service alarm
will be given.

The installer can then select the appropriate TW sensor address from the FG7 and TW#
screen, and simply press the “ZeroPWM” button without having changed any of the other
sensor parameters. This may be sufficient to clear the service condition. If not, the wire
attached to that particular sensor must be loosened, the wire must be tensioned, then
clamped at the sensor, and then the “ZeroPWM” button pressed. Verify alarm
activation

Known Issues

• When an RstAddr is pressed on the TW# screen the bar graph indication should
be cleared.

• The TW Sensor# must be changed before it is valid. The implication is the system
must have at least two sensors on it.

Document Revision history

Rev 1.0 12 December 2018

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