BEKA BA684DF User manual

Issue: 7
22nd September 2006
BA684DF
Field mounting
Fieldbus Display
Issue: 7

2
1. Description
1.1 Documentation
1.2 Version 2.0 firmware
2. Operation
2.1 Controls
3. System Design
3.1 External switches
3.2 Alarm outputs
4. Installation
4.1 Location
4.2 Installation procedure
4.3 EMC
5. Display & Alarm Configuration
5.1 Default configuration
5.2 Accessing the display configuration
menus
5.3 Configurable functions
5.3.1 Screens (Display formats)
5.3.2 Input settings
5.3.3 Tags
5.3.4 Units
5.3.5 Alarms
5.3.5.1 Alarm Summary
5.3.5.2 Alarm Activation
5.3.5.3 Alarm Output
5.3.6 Display
5.3.6.1 Settings
5.3.6.2 Quick Access
5.3.6.3 Access Code
5.3.7 Keys
5.3.8 Code
5.3.9 Unit Info
5.3.10 Defaults
5.3.10.1 Display Defaults
5.3.10.2 Interface Board
Defaults.
5.3.10.3 FF Revisions 1 and 2
5.4 Quick Access Menu
6. Programming
7. Maintenance
7.1 Fault finding during commissioning
7.2 Fault finding after commissioning
7.3 Servicing
7.4 Routine maintenance
7.5 Guarantee
7.6 Customer comments
8. Accessories
8.1 Tag plate
8.2 Pipe mounting kits
8.3 Fieldbus Display - Programming Guide.
8.4 Fieldbus Interface Guides
9. Index
CONTENTS
The BA684DF is CE marked to show compliance with the
E
u
r
opea
n EM
C
Dir
ect
iv
e
2
00
4
/
1
08/
E
C

3
1. DESCRIPTION
The BA684DF Fieldbus Display can display up to
eight fieldbus process variables, together with their
units of measurement and tag information. The
instrument is bus powered so no additional power
supply is required.
Two versions are available, one for Profibus PA
and the other for Fieldbus Foundation systems.
The Foundation Fieldbus version may be ordered,
or configured on-site, with alternative function
blocks allowing use with most Fieldbus Foundation
hosts.
Order Communication Function
Code Protocol Blocks
BA684DF-P Profibus PA Eight Analogue Outputs
(8 x AO)
BA684DF-F Fieldbus Revision 1
Foundation One Multiple Analogue
Output
(1 x MAO)
or Revision 2
Two Input Selectors
(2 x IS)
The required Device Description files, which may
be downloaded from the Fieldbus Foundation or
BEKA web sites, depend upon which BA684DF
revision is selected.
The instrument’s communications protocol is
shown on a label inside the terminal cover.
Nine selectable standard display formats enable
one, two, three or four process variables, some
with bargraphs to be displayed on one screen.
Alternatively, custom display formats including text
and simple graphics may be generated and saved
in permanent memory.
The four front panel push buttons that control the
instrument display may also be used for returning
operator acknowledgements, thus enabling the
Fieldbus Display to function as a simple operator
interface. If larger industrial push buttons are
required for entering these acknowledgements, up
to six external switches may be connected to the
BA684DF. These switch inputs may also be used
for returning the status of plant contacts.
The Fieldbus Display can be supplied with six
optional alarm outputs that may be linked to any of
the displayed fieldbus variables.
Housed in a robust IP66 glass reinforced polyester
(GRP) enclosure with a toughened glass window,
the BA684DF is surface mounting, or may be pipe
mounted using one of the accessory kits.
1.1 Documentation
This instruction manual describes system design,
conditioning and installation of the BA684DF
fieldbus display. For detailed programming
information please refer to the following guides that
can be downloaded from the BEKA website
www.beka.co.uk
Foundation Fieldbus Display – Fieldbus Interface
Guide
Profibus Display – Fieldbus Interface Guide
Fieldbus Display – Programming Guide
1.2 Version 2.0 firmware
This manual describes the enhanced features in
BA684DF fieldbus displays employing version 2.0
firmware that was released in December 2005.
Namely:
Standard screens increased from 4 to 9
Multiple bargraph limits added
Input scaling added
Fieldbus Foundation version now has choice
of fieldbus function blocks:
Revision 1 1 x MAO (multiple analogue
output)
Revision 2, 2 x IS (Input selector)
Selection can be made on-site.
The instrument’s firmware version can be
established using the ‘Unit Info’ function in the
main configuration menu – see section 5.3.9 of this
manual.
BA684DF displays employing version 2.0 firmware
are backwards compatible with all earlier versions
of the instrument.

4
2. OPERATION
Fig 1 shows a simplified block diagram of the
BA684DF Fieldbus Display. When the optional
alarms and external switches are not used, the
instrument only requires a two-wire connection to
the fieldbus.
How much of the BA684DF configuration can be
performed via the fieldbus depends upon the
instrument version and the system host.
Parameters that can not be configured via the
fieldbus can be set via the four front panel push
buttons. Menus enable the required standard
display format to be selected and the units of
measurement, plus tag information for each
displayed fieldbus variable to be entered. Each
fieldbus variable may be individually offset and
scaled, and when a standard screen including a
bargraph is selected, the limits of each bargraph
can be set. Alarm function and setpoints can also
be configured.
Fieldbus configuration files for the BA684DF may
be downloaded from the appropriate Fieldbus
Foundation or Profibus web sites, or from the
BEKA associates web site at www.beka.co.uk.
Fig 1 Simplified block diagram of BA684DF
2.1 Controls
The user can scroll through the display screens by
operating the Up or Down push-buttons. The
number of screens available depends upon how
the BA684DF display has been configured. If one
fieldbus variable per screen has been configured,
eight screens will be present; if four fieldbus
variables per screen have been configured, only
two screens will be available.
Irrespective of the number of fieldbus variables
assigned to the BA684DF, the instrument always
has provision for displaying eight variables.
Unassigned inputs are displayed as zero with a
bad data warning i.e. light digits on a dark
background. When a custom display format,
which requires programming is used, the number
of fieldbus variables displayed may be defined.
If enabled, operating the Pand Up push-buttons
simultaneously activates the Quick Access Menu,
allowing the user to adjust the display contrast
without providing access to any of the other
configuration parameters. Additional security may
be provided by an optional access code.

5
3. SYSTEM DESIGN
The BA684DF may be connected to any fieldbus
segment as shown in Fig 2, providing it can
provide the additional 25mA required to operate
the Fieldbus Display.
Fig 2 Fieldbus system
3.1 External switches
For applications requiring operator inputs to be
made by large industrial push buttons, terminals
S1 to S7 allow up to six external switches to be
connected to the Fieldbus Display. When external
switches are connected, the front panel push
buttons may be operated in parallel or disabled –
see section 5.3.7.
The BA684DF inputs S1 to S7 for external
switches are not electrically isolated from the
fieldbus terminals, switches and wiring must
therefore be isolated from earth and all other
electrical circuits.
For reliable operation it is recommended that the
cable connecting the Fieldbus Display to external
switches less than 5m long.
3.2 Alarm outputs
The BA684DF can be supplied with six alarm
outputs that may be linked to any of the displayed
variables. Each alarm output is a galvanically
isolated single pole solid state switch output as
shown in Fig 3.
Fig 3 Equivalent circuit of each switch output
The outputs are polarised and current will only flow
in one direction. Odd numbered terminals should
be connected to the positive side of the supply.
Ron = 5Ω+ 0.7V
Roff = greater than 1MΩ
Note: Because of the series protection diode,
some test meters may not detect a closed alarm
output.
WARNING
These Alarm Outputs should not be used
for critical safety applications such as an
emergency shut down system.
When the BA684DF is disconnected from the
fieldbus, or the fieldbus is de-energised, all the
alarm outputs will open irrespective of how they
have been configured.

6
4. INSTALLATION
4.1 Location
The BA684DF Fieldbus Display is housed in a
robust IP66 glass reinforced polyester (GRP)
enclosure incorporating an armoured glass window
and stainless steel fittings. It is suitable for exterior
mounting in most industrial environments,
including off-shore and waste water treatment
installations. Please consult BEKA associates if
high vibration is anticipated.
The BA684DF enclosure is surface mounting.
Accessory kits described in sections 8.2 of this
manual enable the instrument to be mounted onto
a vertical or horizontal pipe.
The field terminals and the two mounting holes are
located in a separate compartment with a sealed
cover allowing the instrument to be installed
without exposing the display assembly.
The BA684DF earth terminal is connected to the
carbon loaded GRP case. If the case is not bolted
to an earthed post or structure, the earth terminal
should be connected to a local earth.
The BA684DF enclosure is supplied with a
bonding plate to ensure electrical continuity
between the three conduit / cable entries.
4.2 Installation Procedure
Fig 4 illustrates the instrument installation
procedure.
a. Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
b. Mount the instrument on a flat surface and
secure with two M6 screws through the 'B'
holes. Alternatively use one of the mounting
kits described in section 8.2
c. Remove the temporary dust seals from the
three cable entries and install the required
glands, conduit fittings or blanking plugs.
Note: The temporary dust seals fitted for
transit do not maintain the IP66 protection of
the BA684DF enclosure.
d. Connect the field wiring to the terminals as
shown in Fig 5.
e. Replace the instrument terminal cover and
evenly tighten the two 'A' screws.
Fig 4 BA684DF installation procedure
4.3 EMC
The BA684DF complies with the requirements of
the European EMC Directive 2004/108/EEC. For
specified immunity, all wiring should be in
screened twisted pairs with the screens earthed at
only one point.

7
Fig 5 Dimensions and terminal connections

8
5. DISPLAY & ALARM CONFIGURATION
In addition to loading the BA684DF fieldbus
configuration files onto the system host and
defining up to eight fieldbus variables that are to be
displayed, the instrument display and alarms, if
fitted, have to be configured. How much of this
configuration can be done via the fieldbus depends
upon the instrument version and the system host.
Parameters that can not be configured via the
fielldbus, may be set via the four front panel push
buttons
All the display and alarm configuration functions
are contained in an easy to use menu that is
shown in Fig 6. Where necessary the sub-menus
contain on-screen prompts to guide the user
through each adjustment.
When navigating through the configuration menu,
the push-button(s) should be held until the required
screen is displayed.
5.1 Default configuration
Unless otherwise requested at the time of ordering,
BA684DF Fieldbus Displays will be supplied
configured as follows:
Profibus & Fieldbus Foundaton versions
Keys Both
Display brightness 100%
Display contrast 50%
Quick access menu On
Quick access menu code 0000
Configuration menu
access code. 0000
Screen Single variable
Number format Auto
All alarms Disabled
Alarm activation Good data only
Alarm outputs N/C
Bargraph
Low 0
High 100
Input scaling
Zero offset 0
Gain factor 1
Fieldbus Foundation version
Revision Revision 2
(2 x IS function
blocks)
5.2 Accessing the display configuration
menus
Throughout this manual push buttons are shown in
italics e.g. P or Up push button, and legends
displayed by the instrument are shown within
inverted commas e.g. 'Enter Access Code'.
Operating the Pand Epush buttons
simultaneously accesses the display configuration
menu. If the BA684DF is not protected by an
access code the main menu will be displayed. If
an access code other than the default code 0000
has already been entered, the BA684DF will
request that the access code be entered.
Using the Up or Down button set the first digit of
the code which will be flashing. Pressing Pwill
transfer control to the next digit, which should be
adjusted in the same way. When all four digits
have been set, pressing the Ebutton will enter the
access code. If the code is correct the main
menu will be displayed, if the code is incorrect
‘Invalid Code’ will be displayed.
When entering an access code, timeout will occur
and the instrument will automatically return to the
operating mode ten seconds after a push button
was last operated. In all other menus, timeout
occurs after sixty seconds.
The structure of the display configuration menu is
shown in Fig 6. Navigation is achieved by
highlighting the required function using the Up and
Down buttons and then operating the Pbutton to
display the selected function sub-menu, from
which a further selection or adjustment may be
made. Operating the Ebutton moves the display
back up one level.
A flashing highlight indicates that an option or
alphanumeric character may be selected using the
Up and Down buttons and entered using the E
button. If only one entry or adjustment can be
made in a sub-menu, the display will automatically
move up one menu level when the adjustment is
entered. If more than one adjustment can be
made in a sub-menu, the highlight may be moved
to the second variable using the Up or Down
button after the first setting has been entered.
Operating the Pbutton allows the second variable
to be adjusted.
When multiple numeric or alpha characters are
adjusted e.g. an alarm setpoint or a tag legend, the
adjustment is made one digit at a time using the
Up and Down buttons. After the first flashing digit
has been set as required, the flashing highlight can
be moved to the next digit by operating the P
button. When all digits have been set, operating
the Ebutton will enter the setting.
Following completion of the instrument
configuration, the Ebutton should be operated to
step the display back to the main menu. One more
operation of the Ebutton will then return the
BA684DF to the operating mode.

9
5.3 Configurable functions
This section provides an explanation of each
configurable function and should be read in
conjunction with Fig 6.
5.3.1 Screens (Display format)
The BA684DF can display up to eight fieldbus
variables that are identified as IN_1 to IN_8. The
fieldbus variable that each one represents is
determined by the BA684DF configuration at the
fieldbus system host - see the appropriate
Fieldbus Interface Guide.
This sub-menu allows one of nine standard display
formats or a custom format to be selected. The
standard formats contain one, two, three or four
fieldbus variables some with bargraphs as shown
below.
Custom formats, which are identified as ‘Text
Display’ in this menu, require programming which
is explained in the Fieldbus Display - Programming
Guide.
One variable
Two variables
Four variables
One variable + horizontal bargraph
Two variables + horizontal bargraphs
One variable + vertical bargraph
Two variables + vertical bargraphs
Three variables + vertical bargraphs
Four variables + vertical bargraphs
5.3.2 Input Settings
Only included in Profibus PA and Fieldbus
Foundation Revision 1 instruments. Omitted from
Fieldbus Foundation Revision 2 instruments
because these parameter can be easily configured in
the Display Transducer Block.
The Input Setting function is divided into two
groups of sub-functions. The first, ‘BarLimits Src’
is included to maintain backwards compatible with
earlier firmware issues in which fieldbus variables
IN_7 and IN_8 were used to define all the
bargraph limits. This reduced the number of
fieldbus variables that could be displayed with
bargraphs from eight to six.
Version 2.0 firmware includes the improved ‘Per
Input’ option that enables the lower and upper
limits of a bargraph for each of the eight fieldbus
variables to be defined via the front panel push
buttons. It is recommended that ‘Per Input’ option
be used for new installations.

10
In addition to defining individual limits for up to
eight bargraphs, the second group of sub-functions
enables the decimal point position for each display
to be defined. Each of the eight fieldbus inputs
may also be offset and scaled before being
displayed which allows variables to be displayed in
alternative units of measurement.
Display = (Gain x Fieldbus variable) + Offset
The sub-functions for each input are:
‘Offset’ Adds a positive or negative offset to
the fieldbus variable before it is
displayed.
‘Gain’ Multiplies the fieldbus variable by a
factor before it is displayed.
‘Bar Lo’ Defines the bargraph lower limit *
‘Bar Hi’ Defines the bargraph higher limit *
‘Format’ Defines the position of the displayed
decimal point.*
Six options are available:
Auto: Max resolution with selected
display format.
4 DP 4 digits on right of decimal point
3 DP 3 digits on right of decimal point
2 DP 2 digits on right of decimal point
1 DP 1 digit on right of decimal point
0 DP No decimal point
*These functions are not included when ‘Text
Display’ is selected in the Screens menu – see
5.3.1.
The total number of display digits available
depends upon the display screen selected – see
5.3.1
Standard
Screen Description Digits
1 1 variable 5, 7, 11 or 17*
22variables 7
34variables 5
4 1 variable + H bar 5, 7, 11 or 17*
5 2 variables + H bars 7
6 1 variable + V bar 6
7 2 variables +V bars 4
8 3 variables + V bars 6
9 4 variables + V bars 4
* Font automatically resizes in auto mode
If a negative number is likely to be displayed, a
digit must be allocated for the negative sign. If the
display overanges all the digits will display ‘?’.
For all options leading zeros are automatically
suppressed.
5.3.3 Tags
Only included in Profibus PA and Fieldbus
Foundation Revision 1 instruments. Omitted from
Fieldbus Foundation Revision 2 instruments
because tags can be easily defined in the Display
Transducer Block.
Each of the eight fieldbus variables may be
displayed with an individual tag that can contain up
to sixteen alphanumeric characters. This menu
allows these tags to be entered. After selecting
the required variable, the tag legend is entered
character by character using the Up and Down
push-buttons. Numbers, upper & lower case
letters and symbols are available.
5.3.4 Units
Only included in Profibus PA and Fieldbus
Foundation Revision 1 instruments. Omitted from
Fieldbus Foundation Revision 2 instruments
because units of measurement can be easily defined
in the Display Transducer Block.
Each of the eight fieldbus variables may be
displayed with units of measurement that can
contain up to eight alphanumeric characters. This
menu allows these units of measurement to be
entered. After selecting the required variable, the
unit of measurement is entered character by
character using the Up and Down push-buttons.
Numbers, upper & lower case letters and symbols
are available.
5.3.5 Alarms
Alarm menus are only included when the BA684DF
is fitted with optional alarm outputs.
Each of the six alarms may be linked to any one of
the eight fieldbus variables displayed by the
BA684DF. Each alarm output can be conditioned
to function as a high or a low alarm, or as a
combined high and low alarm. The output can be
conditioned as normally open ‘N/O’ or normally
closed ‘N/C’ in the non-alarm condition.
Irrespective of settings, all alarm outputs will be
open when the instrument is not powered from the
fieldbus.
When an alarm is activated, the associated
fieldbus variable display flashes, i.e. alternates
between dark figures on a light background and
light figures on a dark background.
There are eight alarm-conditioning sub-menus.

11
5.3.5.1 Alarm Summary
Shows to which fieldbus variable each alarm is
linked and how each alarm has been conditioned.
i.e. high, low, or combined high & low alarm with a
normally open or closed output. No adjustments
can be made via this sub-menu.
5.3.5.2 Alarm Activation
Fieldbus variables that have not been validated are
displayed with dark characters on a light
background, and some screen formats also
contain a status indication. This sub-menu allows
the alarm outputs to be conditioned so that they
only operate with validated fieldbus data, or to
operate irrespective of data validity.
5.3.5.3 Alarm Output
There is a separate sub-menu for each of the six
alarm outputs; these link the alarm to one of the
displayed fieldbus variables and define the alarm
function and the setpoints.
To link the alarm to a displayed variable, position
the highlight over the ‘IN_n’ field, press Pand
using the Up or Down button select the required
input source. Enter the selection by pressing the E
button.
Each alarm output can be N/O or N/C in the non-
alarm condition. To change the setting, position
the highlight over the ‘N/O’ or ‘N/C’ field, press P
and use the Up or Down button to toggle the
setting. Enter the selection by pressing the E
button.
Each alarm output has three functions that can be
independently enabled to condition the output as a
low or high alarm, or as a combined low and high
alarm, either with or without hysteresis.
The required functions can be individually enabled
by positioning the highlight over the Enb/Dis
(Enabled/Disabled) column, pressing Pand
toggling the function to the required state, then
entering the selection by pressing the Ebutton.
Alarm setpoints are entered digit by digit. Place
the highlight over the setpoint to be adjusted and
press P; the flashing digit to be adjusted may then
be selected by again pressing P. When all the
digits have been adjusted, operating the Ebutton
enters the value and moves the menu up one
level.
The function of all alarms may be reviewed from
the alarm summary menu - see 5.3.5.1.
5.3.6 Display
5.3.6.1 Settings
The backlight brilliance and display contrast are
adjustable from this sub-menu.
5.3.6.2 Quick Access
This sub-menu enables the Quick Access Menu
which is described in sections 2.1 and 5.4 When
enabled, an operator can adjust the display
contrast and backlight brilliance without having
access to any other conditioning menus.
5.3.6.3 Access Code
Defines a four digit alphanumeric code that must
be entered to gain access to the Quick Access
Menu. Alpha characters are case sensitive.
Default code 0000 allows direct access without a
code.
5.3.7 Keys
The function of the front panel push buttons may
be transferred to four of the six optional external
push buttons, with or without disabling the
BA684DF front panel push buttons. The table
below shows the function of the BA684DF front
panel and the external push buttons for each of the
four options that may be selected in the Keys sub-
menu.
* Apart from when ‘Internal+Port’ is selected, the Key_Status
does not function when the instrument is in the configuration
menu.
The fourth option ‘Internal + Port’ allows the front
panel push buttons to be used for controlling the
BA684DF Fieldbus Display and the optional
external push buttons to independently enter
operator acknowledgements or controls. This
option also allows the status of plant mechanical
switches to be returned to the host.
For applications where the instrument is only
displaying 1, 2, 3 or 4 variables on a single screen,
it is recommended that external buttons are
selected but not fitted. This will disable the
instrument front panel buttons, but still provide
access to the configuration menu, which may be
protected by a security code.

12
5.3.8 Code
Defines the four digit alphanumeric code that must
be entered to gain access to the instrument
configuration menus. Alpha characters are case
sensitive. Default code 0000 allows direct access
without a code.
5.3.9 Unit Info
Displays the instrument model number and the
software version.
5.3.10 Defaults
This function enables the display and interface
board factory defaults to be restored. For the
Fieldbus Foundation version, the function blocks
(Revision 1 or 2) should be selected to suit the
system host.
5.3.10.1 Display Defaults
This function restores the display defaults defined
in section 5.1. CAUTION
Existing settings can not be recovered
after this function has been used.
5.3.10.2 Interface Board Defaults
This function restores the Fieldbus Interface Board
factory defaults.
CAUTION
Do not use this function when the
BA684DF is connected to an operational
fieldbus, as communication may be
terminated.
5.3.10.3 FF Revisions 1 and 2
Not included in the Profibus version
Unless specified at the time of ordering, BA684DF-
F Fieldbus Foundation Displays will be supplied as
Revision 2 instruments. i.e. two input selector
function blocks (2 x IS).
The BA684DF-F can be converted to a Revision 1
instrument using the Default menu. i.e one
multiple analogue output function block (1
x MAO).
The BA684DF-F revision should be chosen so that
the fieldbus function blocks selected are supported
by the system host.
To change the BA684DF-F revision, highlight the
required revision in the ‘Restore Defaults’ menu
and follow the screen prompts until ‘Defaults
Loaded Now power cycle the unit’ is displayed.
To complete the installation remove the BA684DF-
F power supply for a few seconds, when power is
restored the instrument will have been converted
to the new revision.
5.4 Quick Access Menu
The Quick Access Menu allows an operator to
adjust the backlight brilliance and the display
contrast without having access to the other
configuration parameters.
The quick access menu is accessed by operating
the Pand Up push-buttons simultaneously. If the
Quick Access Menu is not protected by an access
code the contrast and brilliance controls will be
displayed immediately. If an access code other
than the default code 0000 has already been
entered, the BA684DF will request that the access
code be entered.
The display backlight brilliance is adjusted using
the Up and Down push buttons. Operating the P
push button will transfer control to the display
contrast adjustment. When both are set as
required, operating the Ebutton will store both
settings and return the instrument to the operating
mode.

13

14
6. PROGRAMMING
The BA684DF only requires programming if the
standard display formats are not suitable and a
custom display format has to be designed. The
Fieldbus Display Programming Guide, which may
be downloaded from the BEKA web site at
www.beka.co.uk, explains how to construct custom
screens and includes examples.
7. MAINTENANCE
7.1 Fault finding during commissioning
If a BA684DF fails to function during
commissioning the following procedure should be
followed:
Symptom Cause Check:
No Display Fieldbus not
powered 9 to 32V between terminals 1 & 2.
No variables Fieldbus not
configured
BA684DF does
not have correct
protocol
Instrument
configuration at
host
That BA684DF
protocol is same
as fieldbus.
i.e. Fieldbus
Foundation or
Profibus PA.
Wrong variable
displayed Wrong screen selected Other screens by operating Up or
Down button
Display showing
‘?????’ Display overrange Number format see section 5.3.2
No backlight Brilliance turned
down Setting in display menu
Low or excessive
contrast Incorrect contrast setting Setting in display menu
Displayed
variable is
inverted
i.e. light digits on
dark background
Variable has
‘bad’ status Configuration and instrument
supplying
variable
Displayed
variable is
flashing
Associated alarm
has been
activated
Setpoints
Bargraph on
standard display
format is shown
dotted
Displayed
fieldbus variable
is outside
bargraph limits or
data is ‘bad’
Bargraph limits
see section 5.3.5
7.2 Fault finding after commissioning
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
If a BA684DF fails after it has been functioning
correctly, the table shown in section 7.1 may help
to identify the cause of the failure.
If this procedure does not reveal the cause of the
fault, it is recommended that the instrument is
replaced.
7.3 Servicing
We recommend that faulty BA684DF Fieldbus
Displays are returned to BEKA associates or to our
local agent for repair.
7.4 Routine maintenance
The mechanical and electrical condition of the
instrument should be regularly checked. Initially
annual inspections are recommended, although
the inspection frequency should be adjusted to suit
the environmental conditions.
7.5 Guarantee
Instruments which fail within the guarantee period
should be returned to BEKA associates or our local
agent. It is helpful if a brief description of the fault
symptoms is provided.
7.6 Customer comments
BEKA associates is always pleased to receive
comments from customers about our products and
services. All communications are acknowledged
and whenever possible, suggestions are
implemented.

15
8. ACCESSORIES
8.1 Tag plate
The BA684DF can be supplied with a blank or
custom engraved stainless steel plate secured by
two screws to the side of the instrument enclosure.
This plate can accommodate:
1 row of 9 alphanumeric characters 10mm high
or 1 row of 11 alphanumeric characters 7mm high
or 2 rows of 18 alphanumeric characters 5mm
high
8.2 Pipe mounting kits
Two pipe mounting kits are available for securing
the BA684DF to a horizontal or vertical pipe.
BA392D Stainless steel bracket secured by two
worm drive hose clips for 60 to 80mm
outside diameter pipes.
BA393 Heavy duty stainless steel bracket
secured by a single 'V' bolt. Will clamp
to any pipe with an outside diameter
between 40 and 80mm.
8.3 Fieldbus Display - Programming Guide
Explains how to create custom screens for all
BEKA fieldbus displays. It is not necessary to
consult this guide if one of the nine standard
display screens is being used.
The guide may be requested from the BEKA sales
office or downloaded from the BEKA web site at
www.beka.co.uk
8.4 Fieldbus Interface Guides
There are two Fieldbus Interface Guides, one for
BEKA Profibus products and one for BEKA
Fieldbus Foundation products. The appropriate
guide should be consulted prior to commissioning
all BEKA fieldbus products.
Both guides may be requested from the BEKA
sales office or downloaded from the BEKA web
site at www.beka.co.uk

16
9. INDEX
Subject Section
Alarms 5.3.5
Activation 5.3.5.2
Output 3.2; 5.3.5.3
Summary 5.3.5.1
Backlight 5.3.6.1
Bargraph limits 5.3.2
Configuration menu Fig 6
Controls 2.1
Code 5.3.8
Decimal points 5.3.2
Default settings 5.1; 5.3.10
Display 5.3.6
Access code 5.3.6.3
Settings 5.3.6.1
Quick access 5.3.6.2
EMC 4.3
External switches 3.1; 5.3.7
Fault finding
During commissioning 7.1
After commissioning 7.2
Fieldbus
Foundation 1; 2
Display –
Programming Guide 8.3
Interface Guides 8.4
Revisions 1 & 2 5.3.10.3
Guarantee 7.5
Input scaling 5.3.2
Installation 4.
Keys 5.3.7
Location 4.1
Maintenance 7.
Routine 7.4
Number Format 5.3.2
Subject Section
Pipe mounting kits 8.2
Programming Guide 6; 5.3.1; 8.3
Profibus PA 1; 2
Quick access menu 5.3.6.2; 5.4
Revisions 1 & 2 5.3.10.3
Servicing 7.3
Screens (display format) 5.3.1
Tags 5.3.3
Tag plate 8.1
Terminal numbers Fig 5
Units (of measurement) 5.3.4
Unit Info (firmware version)5.3.9