Andel Bundguard 5 User manual

Bundguard 5 12.01.2022 Rev.4 1
Bundguard 5
Installation and Operation Manual
Andel Limited
Unit 1 Dodworth Business Park South,
Upper Cliffe Road,
Dodworth,
Barnsley
S75 3SP
Tel [phone]
Fax [phone]
www.andel.co.uk

Bundguard 5 12.01.2022 Rev.4
2
Contents
1.Important safety instructions .............................................................................4
2.Introduction ....................................................................................................5
2.1 Available Models .................................................................................................... 6
2.2 Alarms....................................................................................................................7
2.3.1 Control Panel.......................................................................................................8
2.3.2 Bundguard Issue 3A Sensor / Pumps Unit.............................................................9
2.3.2.1 Sensor Unit ..................................................................................................... 10
2.3.2.2 Ebara Best One Submersible Pump .................................................................. 10
2.3.2.3 Fixing Kit ......................................................................................................... 10
3. Installation....................................................................................................11
3.1 Control Panel Mounting ........................................................................................ 11
3.2 Sensor and Pump Mounting.................................................................................. 11
3.3 Panel & Sensor Connections.................................................................................. 12
4. System Setup ................................................................................................13
4.1 Installer Menu Operation...................................................................................... 14
4.1.1 Setting Date/Time.............................................................................................. 14
4.1.2 Setting Number of Pumps .................................................................................. 14
4.1.3 Set Current Trip Threshold ................................................................................. 14
4.1.4 Setting Auto-Changeover ................................................................................... 14
4.1.5 High Water Delay............................................................................................... 14
4.1.6 View Current (pump current reading) ................................................................. 14
4.1.7 Setting Overcurrent Trip..................................................................................... 14
4.1.8 Setting Pump Switching Delay ............................................................................ 15
4.1.9 MODBUS............................................................................................................ 15
4.1.10 Floating Paint Values........................................................................................ 15
4.1.10.1 Registers....................................................................................................... 16
4.1.10.2 Discrete inputs .............................................................................................. 16

Bundguard 5 12.01.2022 Rev.4
3
4.1.10.3 Input Registers .............................................................................................. 17
4.1.10.4 Holding registers ........................................................................................... 17
4.1.10.5 Custom function codes.................................................................................. 17
4.1.10.6 getNumEvents............................................................................................... 17
4.1.10.7 Request......................................................................................................... 18
4.1.10.8 Response ...................................................................................................... 18
4.1.10.9 Error ............................................................................................................. 18
4.1.10.10 getEvent...................................................................................................... 18
4.1.10.11 Request....................................................................................................... 18
4.1.10.12 Response..................................................................................................................19
4.1.10.13 Error ........................................................................................................... 20
4.1.10.14 Error Format ............................................................................................... 20
4.1.10.15 Pressure monitoring (External Filter)............................................................ 20
4.1.10.16 Flow metering............................................................................................. 21
4.1.10.17 GSM............................................................................................................ 21
4.1.11 Sim Inserted..................................................................................................... 22
4.1.11.1 Network Status ............................................................................................. 22
4.1.11.2 Operator name.............................................................................................. 23
5.Technical Specification ....................................................................................23
Thank you for selecting the Bundguard 5. This manual provides safety, installation, and operation information.
Please, read before installing or operating the unit and retain for future reference.

Bundguard 5 12.01.2022 Rev.4
4
1. Important safety instructions
It is important that you read all the instructions before installing or using this equipment; paying
particular attention to the statements following the symbols detailed below.
Danger:
Risk of electric shock, the control panel contains high voltages and installation work should be carried
out with power isolated.
Risk of electric shock, the installer is required to access the unit with power applied in order to set up
the system the installer should therefore be correctly trained before setting up the system.
If the equipment is not used in the manner specified by the manufacturer, the protection provided by
the equipment may be impaired.
Under no circumstances should additional holes be made in the enclosure.
This equipment is for indoor and outdoor use.
Caution: the mains terminal cover on the PCB must be replaced should it be removed prior to use.
Warning: this equipment must be earthed.
The BundGuard control panel must be provided with an Earth (Ground) to ensure correct and safe
operation. If the panel is not correctly earthed (grounded),
Andel Limited cannot guarantee correct operation of the system.
Warning: connection of peripherals should only be carried out once the mains supply has been isolated
by breaking the RCD contactor.
Warning: disconnect the mains supply before undertaking any maintenance work within the equipment.
Any unused cable entry point must be blanked off to prevent access using suitably rated IP65/66
blanking plug.

Bundguard 5 12.01.2022 Rev.4
5
2.Introduction
Thank you for selecting the BundGuard Issue 5 bund dewatering system. This manual provides safety,
installation and operation information, please, read before installing or operating the unit and retain for
future reference.
The Andel BundGuard Issue 5 is a tried and tested fully automatic bund dewatering system, which
discriminates between oil and water. It continuously monitors the levels of rainwater and oil collecting
in the bund. When a pre-set water level is reached the pump is activated and the water removed from
the bund.
The system consists of a control panel, combined sensor and pump, hose and fixing key. The
pump/sensor unit is usually mounted in a sump within the bund to ensure the water level within the
bund is kept below the top of the sump. It is connected to the control panel, which controls the pump(s)
and also contains the warning indicators and alarm outputs. Warning indicators are provided for system
status, pump failure or malfunction and when oil leaks or spillages reach a maximum level. A typical
installation for a single pump configuration is shown in Figure 1.
© Copyright Ian Pogson Andel Ltd 2003/2004
All rights reserved. Duplication &/or transmission of whole or part expressly
forbidden without permission.
BundGuard ®
Anti-syphon device
Control Panel
(on bracket)
Drain
Pump/Sensor Unit
BUND
SUMP
Discharge Hose
5m cables
Power & Alarm
output cables
Figure 1 Typical BundGuard Installation

Bundguard 5 12.01.2022 Rev.4
6
2.1 Available Models
The BundGuard Issue 5 is available in three variations, these are entitled:
Option 1
Option 1 + GSM
The variation of the BundGuard Issue 5 includes all core-functionality expected from a bund de-watering
system. The BundGuard Issue 5 option 1 variation includes more sophisticated alarms, detection
circuitry, and data interfaces on top of the features of the variation. Option 1 + GSM adds the ability to
forward textual alarms via SMS message over a GSM network.
The specific features built into each variation is detailed in the table below:
Each feature is described in more detail throughout the remainder of this manual.
Feature
Option 1
Option 1 GSM
High oil
High water
Mains failure
System fault
Pump disable
Historical data
Alarm delay customisation
Technical support code
Connector disconnection alarm
LCD menu system
Textual alarms
Capability for 2 pumps
Filter back-pressure monitoring support
Outlet water meter support
Pump current monitoring
Auto changeover
Over-current disable
Battery backup
Mains Alert(Common alarm mains switch output)
MODBUS RTU interface
SMS alarm forwarding

Bundguard 5 12.01.2022 Rev.4
7
2.2 Alarms
The BundGuard Issue 5 has numerous alarms that can be triggered by specific events the table below
give details of all the alarms.
Alarm –(LCD Text)
Indicator
Relay
Cause of Alarm
Mains Failed (no LCD
text)
none
Mains Failure
The mains supply input have failed.
ER0 Probe Error
System Fault
System Fault
The combination of the sensor input states
indicates an unknown bund state
High Water
High Water
High Water
Bund water level exceeded
High Oil
High Oil
High Oil
Bund oil level exceeded
ER 1 HIGH SHORT
System Fault
System Fault
The sensor’s high water probe is short
circuited to the common probe when pump
start probe out of water.
ER 2 START SHORT
System Fault
System Fault
The sensor’s pump start probe is short
circuited to the common probe when sensors
stop probe out of water
ER 3 STOP OPEN
System Fault
System Fault
The sensor’s pump stop probe is open circuit
when start probe is in water.
ER 4 START OPEN
System Fault
System Fault
The sensor’s pump start probe is open circuit
when high water probe is in water.
Pump1 > limit
System Fault
System Fault
The current drawn by Pump 1 has exceeded its
pre-set limit
Pump2 > limit
System Fault
System Fault
The current drawn by Pump 2 has exceeded its
pre-set limit
Connector N/C
System Fault
System Fault
One or more control panel connectors is not
connected correctly
Pump1 disable
Pump 1
Disable
Pump 1
Disable
The drive circuitry for Pump 1 has failed in a
pumping state and has been disabled
Pump2 disable
Pump 2
Disable
Pump 2
Disable
The drive circuitry for Pump 2 has failed in a
pumping state and has been disabled
Pressure1 > lim
System Fault
System Fault
The outlet filter (designated filter 1) pressure
has exceeded a pre-set threshold
Pressure2 > lim
System Fault
System Fault
The outlet filter (designated filter 1) pressure
has exceeded a pre-set threshold
Batt engaged
System Fault
System Fault
The mains supply has dropped below a usable
level or has been removed completely.
Pump1 >Cur Disab
none
None
Pump 1 has exceeded a pre-set threshold 3
times and is now disabled from use.
Pump2 >Cur Disab
none
none
Pump 1 has exceeded a pre-set threshold 3
times and is now disabled from use.

Bundguard 5 12.01.2022 Rev.4
8
2.3 System Components
2.3.1 Control Panel
The control panel is a stainless steel IP66 enclosure for mounting locally to the sensor unit and pump(s),
outside the bund. The control circuitry uses the sensor inputs to determine whether a pump should be
ON or OFF and generate any necessary alarms. This behaviour of the pump(s) and alarm can be
customised through the menu system shown on the internal LCD.
The control panel provides zero-volt free contact relays rated at 220Vdc @ 0.1A for the following
alarms:
Mains failure
High Water
High Oil
System Fault
Pump 1 disable
Pump 2 disable
The control panel also presents LED indicators to signify the following alarms:
Front Panel LED
Colour
Power
Green
System Fault
Red
Pump 1 Active
Green
Pump 2 Active
Green
High Oil Alarm
Red
High Water Alarm
Red
Pump 1 Disabled
Yellow
Pump 1 Disabled
Yellow
The control circuitry incorporates a pair of independent electronic fail-safe(dead stop) circuits “pump
disable” the feature is incorporated to provide a fail-safe for the main switching contacts to the pump.
This feature will isolate the pump in the event of a system malfunction. A pump disable alarm is
indicated by the respective relay and front panel LED activating. The pump disable always momentarily
activates after an ON to OFF transition of the pump, this is normal, and should be ignored. A de-
bouncing delay of 1 second on any system monitoring this output is recommended.
In addition to the LED indicators listed above the unit also has an LCD screen which gives further alarm
details and system information. When no alarms are active the number of pump operation is displayed.

Bundguard 5 12.01.2022 Rev.4
9
2.3.2 Bundguard Issue 3A Sensor / Pumps Unit
The pump and sensor unit are a combined submersible IP68 unit manufactured entirely from stainless
steel. If a second pump is fitted this will be mounted separate to the sensor and pump combination.
Individual multi-core 10m cables are fitted for both:
-Pump power (230ac or 110V ac)
-Sensor probes
Figure 3 shows the operational dimensions of the BundGuard Issue 3A combined sensor /pump installed
into a 600mm x 600mm x 600mm sump (which is the minimum recommended size for the sump)
A 5m length of reinforced 25mm rubber discharge hose is provided with the system along with
necessary fixings.
Figure 3 BG Issue 3A Sensor Details.

Bundguard 5 12.01.2022 Rev.4
10
2.3.2.1 Sensor Unit
The sensor unit internally has 4 probes and one float switch, Sensor probes are pre-cut at manufacture
to optimum dimensions to minimise wear on the pump and ensure correct operation. The probes can be
adjusted a further ±25mm during installation to conform to particular requirements depending upon the
bund and sump geometry. Figure 4 show the sensor probe configuration and their function.
! The Pump stop and common probes must not be adjusted.
Figure 4 BundGuard Issue 3A Sensor Configuration
2.3.2.2 Ebara Best One Submersible Pump
The attached Ebara Best One submersible pump has a pumping capacity of 140Litres/minute with a 2-
3m head. The pump comes fitted with barbed 1 inch hose tail for connection to the supplied hose (5m
with unit)
2.3.2.3 Fixing Kit
The system is supplied with a fixing kit which includes all necessary fixing and glands for installation. An
anti-syphon device is supplied in the fixing kit for fitting in-line into the discharge hose.

Bundguard 5 12.01.2022 Rev.4
11
3. Installation
3.1 Control Panel Mounting
The control panel houses all electrical and electronic circuitry and connection points and must be
mounted externally to the bund, located such that the panel will not be submerged in normal operation.
The control panel is typically mounted on the bund wall or mounting frame attached to the bund wall,
using either the M6 wall anchors or M6 bolts provided within the fixing kit. There are 4 x 20mm
mounting holes in the base of the control panel for entry of the mains power, telemetry, pump power
and sensor cables. The fixing kit provides CW20S gland for SWA mains power and telemetry cables and
M20 plastic glands for the pump and sensor cables.
3.2 Sensor and Pump Mounting
The pump(s) and sensor unit are placed at the lowest point of the bund. Most bunds have a section that
has a floor lower than that of the majority of the bund floor; this is called a ‘sump’. If a sump is present,
that is where the BundGuard pump and sensor unit should be located.
The pump and sensor unit are included with 10m long cables to connect to the control panel. Consult
the connection diagrams in this section prior to applying power to the BundGuard control panel.
The anti-syphon device is supplied in the fixing kit should be positioned at the highest point, where the
discharge hose passes over the bund wall for example. The arrows moulded into the body of the anti-
syphon device should point in the direction of the outflow (away from the pump).
! The anti-syphon device must not be located inside the bund.

Bundguard 5 12.01.2022 Rev.4
12
3.3 Panel & Sensor Connections
The BundGuard is supplied in one of two connectivity configurations. Option 1 as detailed below:
! Installation should only be carried out by suitable trained personnel.
Option 1 Terminal Configuration
Term.
No
Name
Description
Incoming Power connection
1
Input Neutral
RCD Mains Neutral
2
Input Live
RCD Mains Live
3
Input Earth
Mains Earth
Pump Power connection
4
Pump 1 Neutral
Un-switched neutral for pump 1
5
Pump 1 Live
Switched live for pump 1
6
Pump 1 Earth
Un-switch earth for pump 1
7
Pump 2 Neutral
Un-switched neutral for pump 2
8
Pump 2 Live
Switched live for pump 2
9
Pump 2 Earth
Un-switch earth for pump 2
Common Alarm 230Vac Output Connections
10
Common Neutral
Un-switched neutral for beacon or sounder
11
Common LIVE
Switched live for beacon or sounder
12
Common Earth
Un-switched earth for beacon or sounder
Telemetry (relay) connections
13
Pump2 Disable Relay
Pump 2 disable NO relay contact
14
Pump1 Disable Relay
Pump 1 disable NO relay contact
15
Mains Fail Relay
Mains failure NC relay contact
16
High Oil Relay
High oil NO relay contact
17
System Fault Relay
System fault NO relay contact
18
High Water Relay
High water NO relay contact
19
Relay Common
Common connection to all alarm relays
Sensor Connection
20
Oil +VE
Positive switch connection to oil float switch
21
Oil -VE
Negative switch connection to oil float switch
22
High Water Probe (red)
High water probe from sensor unit
23
Start Probe (Yellow)
Start probe from sensor unit
24
Stop Probe (blue)
Stop probe from sensor unit
25
Common probe (Black)
Common probe from sensor unit
Auxiliary Equipment connections ( Filter /flow meters)
26
GND
Control panel signal ground
27
+12V
Control panel signal +12V
28
Pressure 1 input
Pressure 1 sensor 4-20mA or switched input
29
Pressure 2 input
Pressure 2 sensor 4-20mA or switched input
30
Flow input
Flow rate sensor 4-20mA input

Bundguard 5 12.01.2022 Rev.4
13
4. System Setup
After physical installation, the systems settings may require adjusting this is achieved through the
installer interface, the table below give details of the menu structure of the interface and further details
of the operation and settings of each menu items follow.
Menu system
Menu Items
Description
Menu 0/8 –Date and time
Sets date and time
Menu 1/8 –Pump & alarms
Menu for setting pump and alarms
Num. Of Pumps
Sets number of pumps 1 or 2
Set threshold
Set pump current threshold 0-5000mA
Autochange Over
Sets auto changeover (on / off)
HWA Delay
High water alarm delay 0 -60 minutes
View Current
View pump current (mA)
Overcurrent trip
Sets overcurrent protection on or off
Pump delay
Sets pump on delay 3-30 seconds
Main fail
Set mains fail alarm on or off
Menu 2/8 - Modbus
En/Disable
Enable / Disable Modbus communications
RS485
No user options available
Modbus I/D
Set Modbus address 01 - 247
Modbus baud rate
Set Modbus baud rate 300-57600
Listen only
Sets listen mode on or off
Menu 3/8 - Filter
Pressure measure
Filter type
Set type of filter (switched, measurement)
Set thresh 1
Set threshold for filter 1
Set thresh 2
Set threshold for filter 2
Set Num. Of filters
Set number of filters 1 or 2
Pressure @20mA
Set Pressure at 20mA
Pressure @4mA
Set pressure at 4mA
View Pressure
View current pressure reading
Menu 4/8 –Flow meter
Meter Enable
Set meter to on or off
Current flow
View current flow reading
Flow @ 20mA
Set flow at 20mA
Set flow at 4mA
Set flow at 4mA
Menu 5/8 -connector
Set connector disconnect on or off
Menu 6/8 - GSM
En/disable GSM
Enable disable GSM
Set forwarding Number
Set number to send message to
View details
View GSM detail (see page xx)
SIM status
Status of SIM card
Network Status
Network status
Operator name
Name of mobile operator
Menu 6/7 - History
View event history 1 to144(max) events
Menu 8/8 - Info
Serial Number
Panel serial number
Debug code
Debug code (for fault finding)

Bundguard 5 12.01.2022 Rev.4
14
4.1 Installer Menu Operation
The installer system setup menu is excessed via keypad situated top right of the control PCB. The
operation of each of the 6 keys is as detailed in the table below.
Key
Description
Menu
Pressing this key enter /exits the menu system
UP
Press UP Key scrolls up available option
Down
Press UP Key scrolls up available option
Left
Move left along parameter being edited
Right
Move Right along parameter being edited
Accept
Selects sub menu and or save changes to made
4.1.1 Setting Date/Time
Within the Date and Time menu page, the operator can specify the current Date and Time that is used
for history log recording and time-based operations. The date and time are set prior to shipment but
should be check upon installation.
4.1.2 Setting Number of Pumps
Used to set the number of pumps connected to the unit to either 1 or 2 pumps (Option 1 and above).
4.1.3 Set Current Trip Threshold
Used to set the pump trip current threshold the default setting is 2800mA and should only be change
after checking current rating of any pump attached. (Option 1 and above). The same threshold is set for
both pumps 1 and 2.
4.1.4 Setting Auto-Changeover
Used for enabling or disabling the Auto-changeover function, when enabled, cycles the pumping duty
between the two connected pumps. During a high-water alarm state, the standby pump would also be
switched on.
Cycling the pumping duty for normal pumping operations reduces the number of pumping cycles for
each pump and decreases wear on the pump drive circuitry and each pump (Option 1 and above).
4.1.5 High Water Delay
The high-water delay is a time delay specified to delay the time between recognising a water level above
the high water probe, and reacting by executing the high water routine (dependant on BundGuard
model). Enabling this feature allows the site-operator to subdue intermittent high-water alarms upon
times of heavy rainfall or large influx of water.
4.1.6 View Current (pump current reading)
Allow installer to view current drawn by active pump(s) (Option 1 and above).
4.1.7 Setting Overcurrent Trip
Overcurrent protections enable is a toggle control for protection of the pump, should it draw current
higher than the threshold set. The pump drawing the abnormal amount of current will automatically be
shut off and started again after a 5 second delay. If this cycle executes 3 times consecutively, the pump
will be disabled until the next time the BundGuard is power-cycled. (Option 1 and above).

Bundguard 5 12.01.2022 Rev.4
15
4.1.8 Setting Pump Switching Delay
This feature enables the installer to set a length of time between recognising a water level above the
start probe and reacting by enabling the pump. This time is set in a range of 3 to 30 seconds.
Enabling this delay can lower the number of pumping cycles the pump and drive circuitry must endure.
Decreasing failure rate of pump and switching relay.
4.1.9 MODBUS
A MODBUS connection is available on BundGuard models.
MODBUS is available via RS232 or RS485.
The connectivity options available are:
-MODBUS enable (default: OFF)
-Serial protocol (default: RS485)
-MODBUS ID (default: 1)
-Listen mode (default: OFF)
-Baud rate (default: 19200)
The MODBUS ID is also configurable to a value within the range allowable in the MODBUS specification.
When addressing devices on the MODBUS bus, a unique device identifier number is required for each
device. This can only be set via the control panel menu system.
Listen mode is a non-responsive state that the MODBUS module can be placed in to. It permits the
device to only acknowledge and action any requests to write data. In listen mode, the MODBUS device
will not respond to successful or erroneous requests. It will however maintain the communication logs
for all requests received (Packets received, CRC errors etc). Listen only can be toggled ON or OFF in the
control panel menu.
Baud rate also must be set in the control panel menu. All values specified in the MODBUS serial
specification are available. These values are:
-300 baud
-600 baud
-1200 baud
-2400 baud
-4800 baud
-9600 baud
-14400 baud
-19200 baud
-28800 baud
-38400 baud
-56000 baud
-57600 baud
4.1.10 Floating Paint Values
The BundGuard issue 5 stores some register values in a floating point format. This is to allow for wide
ranges of decimal values to be stored. Floating point values are stored in a little-endian format across
two 16-bit MODBUS register locations. The data structure for how floating-point values are formatted
within these two register values is shown below.
31
30
23
22
16
15
0
Sign
Exponent
Fraction
MODBUS data [1]
MODBUS data [0]
15
14
7
6
0
15
0

Bundguard 5 12.01.2022 Rev.4
16
This table shows the data structure for floating point MODBUS register values.
4.1.10.1 Registers
The BundGuard issue 5 supports the MODBUS RTU protocol via RS232 or RS485. The serial protocol is
configured in the menu system. The BundGuard issue 5 supports the full MODBUS RTU specification,
including extended individual and stream access to device identification objects. Full details of these
functions are detailed in the MODBUS application specification.
Any values that span more than one register address, are always little-endian format.
Available data via the MODBUS interface is provided in the registers detailed below:
4.1.10.2 Discrete inputs
Discrete inputs are read-only Boolean bits that indicate the ON/OFF state of a certain feature or alarm.
These can be accessed through use of correctly formatted MODBUS protocol read-coil functions
detailed in the MODBUS specification.
Reg
Name
Description
0
Unknown Probe error
Indicates an unknown probe error fault when set
1
High water
Indicates a high water alarm when set
2
High Oil
Indicates a high oil alarm when set
3
High Short
Indicates a high short alarm when set
4
Start short
Indicates a start short alarm when set
5
Stop open
Indicates a stop open alarm when set
6
Start open
Indicates a start open alarm when set
7
P1 current
Indicates Pump 1 is reading a current value above the threshold
8
P2 current
Indicates Pump 2 is reading a current value above the threshold
9
Connector
Indicates a disconnected connector when set
10
P1 disable
Indicates a pump disable alarm for pump 1 when set
11
P2 disable
Indicates a pump disable alarm for pump 2 when set
12
Pressure 1
Indicates an over-pressure alarm for sensor 1 when set
13
Pressure 2
Indicates an over-pressure alarm for sensor 2 when set
14
Battery backup
Indicates a mains failure and operation from battery power when set
15
P1 current disable
Indicates pump 1 has been disabled due to continued over-current alarms when set
16
P2 current disable
Indicates pump 2 has been disabled due to continued over-current alarms when set
17
GSM connected
Indicates the GSM module has connected to a network when set
18
Pump Stop
Indicates the water level is below the start probe and all pumps are disengaged
19
Pump Start
Indicates the water level is above the start probe and respective pumps are engaged
20
Pump Mid
Indicates the water level is between the start and stop probe and the pumps are engaged
21
Over current 1
Pump 1 is temporarily halted to attempt to recover from an over-current event
22
Over current 2
Pump 2 is temporarily halted to attempt to recover from an over-current event
23
GSM initialised
The GSM module has initialised and has started discovery of a network
24
2nd pump
The second pump has been enabled when set
25
GSM
The GSM module is enabled when set
26
Flow monitoring
Flow monitoring enabled when set
27
Battery backup
Battery backup enabled when set
28
Current monitoring
Current monitoring enabled when set
29
Pressure monitoring
Pressure monitoring enabled when set
30
Filter sensor type
Sensor type selected is a switch-type when set and transducer-type when reset
31
MODBUS
MODBUS enabled when set (included for completeness)
32
Connector disconnect
Connector disconnect alarm enabled when set
33
Auto changeover
Auto changeover enabled when set
34
Mains alert
Mains alert relay enabled when set
35
GSM configured
GSM has a valid forwarding number assigned when set
36
MODBUS protocol
MODBUS is communicated via RS485 when set and RS232 when reset

Bundguard 5 12.01.2022 Rev.4
17
37
Over current protection
Over-current pump disable enabled when set
38
Second filter enabled
Two filters are configures for pressure measurement when set
>38
Reserved
Unused in application –Do not use
4.1.10.3 Input Registers
The BundGuard allows read-only access to a variety of register values on the BundGuard.
These are listed below:
Reg#
Name
Description
Format
0
Filter 1 pressure [0]
The instantaneous pressure of pressure
sensor 1
Bit 0-15 of floating point
1
Filter 1 pressure [1]
Bit 16-31 of floating point
2
Filter 2 pressure [0]
The instantaneous pressure of pressure
sensor 2
Bit 0-15 of floating point
3
Filter 2 pressure [1]
Bit 16-31 of floating point
4
Pump 1 current
The instantaneous current drawn by pump 1
Unsigned integer
5
Pump 2 current
The instantaneous current drawn by pump 2
Unsigned integer
6
Flow total [0]
The total volume of liquid pumped from the
bund in Litres
Bit 0-15 of floating point
7
Flow total [1]
Bit 16-31 of floating point
8
Cycle Count
The total number of times the pump(s) have
switched ON.
Unsigned integer
9
Flow rate [0]
The instantaneous flow rate measured by the
outlet flow meter
Bit 0-15 of floating point
10
Flow rate [1]
Bit 16-31 of floating point
Values provided in a floating point format conform to 32-bit floating point bit structuring. This
formatting is detailed in the floating point section.
4.1.10.4 Holding registers
Read and write access is provided for the following values on the BundGuard:
Reg#
Name
Description
Format
0
Filter 1 pressure threshold [0]
The pressure that causes an
over-pressure 1 alarm
Byte 0 of floating point
1
Filter 1 pressure threshold [1]
Byte 1 of floating point
2
Filter 2 pressure threshold [0]
The pressure that causes an
over-pressure 2 alarm
Bit 0-15 of floating point
3
Filter 2 pressure threshold [1]
Bit 16-31 of floating point
4
Pump 1 current threshold
The current that causes an
over-current alarm
Unsigned integer
4.1.10.5 Custom function codes
The BundGuard allows access to the non-volatile memory where event logs are stored. This access is
provided through the use of a manufacturer-defined function code that is permissible within the
MODBUS.
Request formatting must adhere to the MODBUS specification, whereby the familiar address, function
code, data packet, and cyclic redundancy check fields are compulsory.
4.1.10.6 getNumEvents
getNumEvents returns the quantity of log entries available to requested of the BundGuard. This value
can be up to and including 144.
A data field is not required in the request for the event count number but is provided in the response.

Bundguard 5 12.01.2022 Rev.4
18
4.1.10.7 Request
Function code: 65 (decimal), 0x41 (hex)
This function will not execute or respond when received addressed to the broadcast (address == 0x00)
ID.
Field
Name
Total bytes
Data type
1
Address ID
1
Unsigned integer
2
Function code (0d65/0x41)
1
Unsigned integer
3
CRC
2
Checksum
4.1.10.8 Response
If the request was correct, the response will be formatted as shown below:
Field
Name
Total
bytes
Data type
1
Address ID
1
Unsigned integer
2
Function code (0d65/0x41)
1
Unsigned integer
3
Number of historic events
1
Unsigned integer
4
CRC
2
Checksum
4.1.10.9 Error
Only one error can be produced by operation of this function. If the processor hardware encounters an
error when retrieving the event count; an error code will be responded back to the master.
The error code will only ever be “Server device failure” – 0x04.
4.1.10.10 getEvent
The getEvent function allows the querying MODBUS master to request an event structure for an event
number. Event numbers increment from 0 to 143. Event 0 always referring to the most recent event,
and event 143 referring to the least recent. This data is from the same source of that shown in the
“History” menu tab of the BundGuard menu system.
4.1.10.11 Request
Function code: 0d66 (decimal), 0x42 (hex)
This function will not execute or respond when received addressed to the broadcast (address == 0x00)
ID.
Field
Name
Total
bytes
Data type
1
Address ID
1
Unsigned integer
2
Function code (0d66/0x42)
1
Unsigned integer
3
Event number
1
Unsigned integer
4
CRC
2
Checksum

Bundguard 5 12.01.2022 Rev.4
19
4.1.10.12 Response
If the request was correct, the response will be formatted as shown below:
Field
Name
Total bytes
Data type
1
Address ID
1
Unsigned integer
2
Function code (0d67/0x41)
1
Unsigned integer
3
Event number
1
Unsigned integer
4
Event.time
4
Unsigned 32bit integer
5
Event.ID
1
Enumeration
6
CRC
2
Checksum
Fields 4 and 5 provide the data for the requested event. Field 4 is a 32-bit unsigned integer. This value is
a unix time-stamp (POSIX time) of when the event occurred.
[A unix time stamp is a count of the number of seconds since 1970-01-01]
Field 5 provides an enumeration of the event that occurred. The enumeration table is shown:
Event
enum
Description
Text
0
The sensor unit probes entered an unknown error state
ER 0 Probe Error
1
The sensor unit detected a high water state
High water
2
The sensor unit detected a high oil state
High oil
3
The sensor unit detected a high water short state
ER 1 HIGH SHORT
4
The sensor unit detected a start water short state
ER 2 START SHORT
5
The sensor unit detected a stop water open state
ER 3 STOP OPEN
6
The sensor unit detected a start water open state
ER 4 START OPEN
7
Pump 1 was measured drawing a current above the threshold
Pump1 > limit
8
Pump 2 was measured drawing a current above the threshold
Pump2 > limit
9
The plug and play connector was disconnected
Connector N/C
10
Pump 1 disable circuit was engaged
Pump1 disable
11
Pump 2 disable circuit was engaged
Pump2 disable
12
Filter pressure 1 was measured above the threshold
Pressure1 > lim
13
Filter pressure 2 was measured above the threshold
Pressure2 > lim
14
The BundGuard engaged battery power
Batt engaged
15
Pump 1 was disabled due to repeated over-current alarms
Pump1 >Cur Disab
16
Pump 2 was disabled due to repeated over-current alarms
Pump2 >Cur Disab
17
The GSM module has connected to a network
GSM connecting
18
The BundGuard disengaged battery power
Batt disengaged
19
The BundGuard lost mains (and battery, if installed) power
Unit powered OFF
20
The BundGuard was powered up by mains or battery power
Unit powered ON
21
The on-board processor was reset (processor resets itself automatically on
power up)
Processor reset

Bundguard 5 12.01.2022 Rev.4
20
4.1.10.13 Error
One of two errors after receiving a valid request for this function can be sent. An “illegal data address”
error (0x03), or “Server device failure” error (0x04).
An illegal data address error is sent when the requested event number is greater than the number of
events available. A server device failure error is sent when the processor fails to read the requested
event from the non-volatile memory.
These errors are sent in the format shown below.
4.1.10.14 Error Format
All errors detailed for these manufacturer specific function codes are sent in the MODBUS format as
shown below.
Field
Name
Total bytes
Data type
1
Address ID
1
Unsigned integer
2
Error function (function code || 0x80)
1
Unsigned integer
3
Error code
1
Unsigned integer
4
CRC
2
Checksum
4.1.10.15 Pressure monitoring (External Filter)
The pressure monitoring is used when an external filter is fitted to the pump outlet suck as Andel’s
FilterSepta unit.
Pressure monitoring is only configured from the Installer menu system. The options available for
configuration are:
Pressure sensor type
Transducer (4-20mA)
Switch
Monitoring enable
Yes
Yes
Output type
Yes
Yes
Pressure sensor quantity
Yes
Yes
Pressure 1 threshold
Yes
Pressure 2 threshold
Yes
Pressure calibration 20mA
Yes
Pressure calibration 4mA
Yes
View pressure
Yes
The output type of the pressure sensor used can either be a switched type, with a mechanical pressure
threshold dial, or a 4-20mA current loop transducer type. The output type menu will allow the operator
to select between these.
If a pressure transducer is selected for use, the menu pages for threshold, calibration, and option to
view current pressure are applicable. Otherwise, with a switched pressure sensor, only the quantity of
sensors can be adjusted to any effect. A switched pressure sensor is Boolean in output and requires no
software configuration to work reliably.
The pressure sensor quantity page allows the user to set the number of pressure sensors connected to
the BundGuard. This setting is irrespective of the sensor type selected.