BEKA BA688CF User manual

Issue: 6
8th May 2006
BA688CF
Panel mounting
Fieldbus Display
Issue: 6

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
menu
5.3 Configurable functions
5.3.1 Screens (Display format)
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 & 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 number
8.2 Fieldbus Display-Programming
Guide.
8.3 Fieldbus Interface Guides
9. Index
CONTENTS
The BA688CF is CE marked to show compliance with the
European EMC Directive 89/336/EEC

3
1. DESCRIPTION
The BA688CF Fieldbus Display is a panel
mounting instrument that can display up to eight
fieldbus process variables, together with their
units of measurement and tag information. The
instruments are 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
BA688CF-P Profibus PA Eight Analogue Outputs
(8 x AO)
BA688CF-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 BA688CF-F
revision is selected.
The instrument’s communications protocol is
shown on the instrument information label, which
is located on the top outer surface of the
enclosure.
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 six 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 BA688CF. 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 72 x 144 panel mounting DIN
enclosure, the BA688CF Fieldbus Display has an
IP66 front panel and is supplied with a gasket to
seal the joint between the instrument and the
panel.
1.1 Documentation
This instruction manual describes system design,
conditioning and installation of the BA688CF
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 of
BA688CF 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.
BA688CF 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
BA688CF 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 BA688CF 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 six 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 BA688CF may
be downloaded from the appropriate Fieldbus
Foundation or Profibus web sites, or from the
BEKA associates web site at ww.beka.co.uk.
Fig 1 Simplified block diagram of BA688CF
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 BA688CF 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 BA688CF, 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 BA688CF 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
Terminals S1 to S7 are not electrically isolated
from the fieldbus terminals, therefore external
switches and wiring must 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 is less than 5m long.
3.2 Alarm outputs
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 = 5 + 0.7V
Roff = greater than 1M
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 BA688CF 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 BA688CF is housed in a robust aluminium
enclosure with a toughened glass window
mounted in a Noryl bezel. The front of the
instrument provides IP66 protection and a gasket
seals the joint between the instrument enclosure
and the panel. The instrument may be installed
in any panel providing the environmental limits
shown in the specification are not exceeded.
Fig 4 shows the overall dimensions of the
BA688CF and the panel cut-out. To achieve an
IP66 seal between the instrument enclosure and
the panel, the smaller cut-out must be used and
the instrument secured with four panel mounting
clips.
The BA688CF liquid crystal display has
maximum contrast when viewed from directly
ahead and slightly below the centre line of the
instrument.
Fig 4 BA688CF dimensions
4.2 Installation Procedure
a. Insert the BA688CF into the instrument
panel cut-out from the front of the panel.
b. Fix panel mounting clips to opposite sides
of the instrument and tighten until the
instrument is secure. Four clips are
required to achieve an IP66 seal between
the instrument enclosure and the panel.
c. Connect the panel wiring to the rear
terminal block(s) as shown in Fig 5. To
simplify installation, the terminals are
removable so that panel wiring can be
completed before the instrument is
installed.
Fig 5 Installation and terminal connections

7
4.3 EMC
The BA688CF complies with the requirements of
the European EMC Directive 89/336/EEC. For
specified immunity all wiring should be in
screened twisted pairs.
To prevent circulating currents, cable screens
should only be earthed at one point.

8
5. DISPLAY & ALARM CONFIGURATION
In addition to loading the BA688CF 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 fieldbus, may be set via the six
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, BA688CF Fieldbus Displays will be
supplied configured as follows:
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
menu
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 BA688CF 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 BA688CF 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 Pbutton. 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
BA688CF 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 BA688CF can display up to eight fieldbus
variables. These are identified as IN_1 to IN_8.
The fieldbus variable that each one represents is
determined by the BA688CF 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.
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.

10
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 BA688CF
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
BA688CF. 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.
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 high & low alarm with a normally
open or closed output. No adjustments can be
made in this sub-menu.

11
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 cursor 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/C’ or ‘N/O’ 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 P
and toggling the function to the required state,
then entering the selection by pressing the E
button.
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 E
button 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 & 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 the six optional external push
buttons, with or without disabling the BA688CF
front panel push buttons. The table below shows
the function of the BA688CF 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
BA688CF 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.
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
firmware version.

12
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
BA688CF 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,
BA688CF-F Fieldbus Foundation Displays will be
supplied as Revision 2 instruments. i.e. two input
selector function blocks (2 x IS).
The BA688CF-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 BA688CF-F revision should be chosen so
that the fieldbus function blocks selected are
supported by the system host.
To change the BA688CF-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
BA688CF-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 BA688CF will request that the
access code be entered.
The backlight brilliance is adjusted using the Up
and Down push buttons. Operating the Ppush
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 BA688CF 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 contains examples.
7. MAINTENANCE
7.1 Fault finding during commissioning
If a BA688CF 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
BA688CF does
not have corect
protocol.
Instrument
configuration at
host.
That BA688CF
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 shows
‘?????’ 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 5.3.2
7.2 Fault finding after commissioning
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
If a BA688CF 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 BA688CF 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 number
The BA688CF can be supplied with a thermally
printed tag number on the rear panel. This tag
number is not visible from the front of the
instrument after installation.
8.2 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
8.3 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 5.3.8
Location 4.1
Maintenance 7.
Routine 7.4
Subject Section
Number Format 5.3.2
Programming Guide 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 number 8.1
Terminal numbers Fig 5
Units (of measurement) 5.3.4
Unit Info (firmware version)5.3.9