BEKA BA688CF-F User manual

Issue: 11
27th March 2019
BA688CF-F
FOUNDATION™ fieldbus
Panel mounting display
Issue: 11
For revision 3 instruments with
revision 4.03 firmware

1. Description
1.1 Documentation
1.2 Version 4.03 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 Display transducer block
5.2 Screen selection and alarm
configuration.
5.3 Default configuration
5.4 Accessing instrument configuration
menu.
5.5 Screen selection
5.6 Alarm configuration
5.6.1 Alarm summary
5.6.2 Alarm activation
5.6.3 Alarm output
5.7 Display configuration
5.7.1 Settings
5.7.2 Quick access
5.7.3 Access code
5.7.4 Status text
5.7.5 Last input
5.7.6 Keys
5.7.7 Code
5.7.8 Unit info
5.7.9 Defaults
5.7.10 Display defaults
5.7.11 Interface board defaults
5.8 Quick access menu
6. Maintenance
6.1 Fault finding during commissioning
6.2 Fault finding after commissioning
6.3 Servicing
6.4 Routine maintenance
6.5 Guarantee
6.6 Customer comments
7. Accessories
7.1 Tag number
7.2 FOUNDATION™ fieldbus Interface
Guide.
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CONTENTS
The BA688CF-F is CE marked to show compliance with the
European EMC Directive 2014/30/EU

1. DESCRIPTION
The BA688CF-F FOUNDATION™ 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 instrument is bus powered so no additional
power supply is required.
The instrument’s communication protocol is shown
on the rear panel. The ‘-F’ order code suffix also
indicates the protocol but is not shown on the
instrument identification label. There is an
alternative version of the fieldbus display, order
code BA688CF-P for use on PROFIBUS PA
networks.
This instruction manual describes revision 3
BA688CF-F Foundation fieldbus displays which
were introduced in January 2019. Revision 3
displays have been verified in the FieldComm Labs
as compliant with ITK 6.3.
Instruction manuals for the earlier revision 1 and 2
instruments may be downloaded from the
superseded documentation section of the BEKA
website.
Most of the BA688CF-F display parameters are
configured on-site via the fieldbus. Screen format
selection and alarm configuration is performed
using an internal menu and the instrument's front
panel push buttons.
Up to eight process variables can be displayed
using the two Input Selector function blocks.
The required Device Description files, which may
be downloaded from either the FieldComm or the
BEKA websites, depend upon which BA688CF-F
FOUNDATION™ fieldbus display revision is
selected.
Eleven selectable standard display screen formats
enable one, two, three, four or eight process
variables, some with bargraphs to be displayed on
one screen.
The BA688CF-F FOUNDATION™ fieldbus display
can be supplied with six optional alarm outputs that
may be linked to any of the displayed fieldbus
variables. These alarm outputs are locally
activated from the fieldbus variables and are
configured via the instrument menu and push
buttons. They cannot be controlled via the
fieldbus.
Housed in a robust 72 x 144 panel mounting DIN
enclosure, the BA688CF-F FOUNDATION™
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-F
FOUNDATION™ fieldbus display. For detailed
commissioning information please refer to the
FOUNDATION™ fieldbus Interface Guide that can
be downloaded from the BEKA website
www.beka.co.uk
1.2 Version 4.03 Firmware
Updated firmware was released in January 2019
which includes the following key features:
11 standard screens
Multiple bargraph limits
Individual input scaling
Two 4-input Input Selector function blocks:
Last variable parameter prevents display of
unused inputs.
Fieldbus compliance verified to ITK 6.3
Option added to remove status text from
single variable screens.
The instrument’s firmware version can be
established using the ‘Unit Info’ function in the
main configuration menu – see section 5.7.8 of this
manual.
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2. OPERATION
Fig 1 shows a simplified block diagram of the
BA688CF-F FOUNDATION™ fieldbus display.
When the optional alarms are not fitted, the
instrument only requires a two-wire connection to
the fieldbus.
Parameters that cannot be configured via the
fieldbus can be configured via the four front panel
push buttons. Menus enable the required
standard display screen format to be selected.
The optional alarms are locally activated from the
fieldbus variable and can only be configured and
the setpoints adjusted using the BA688CF-F push
buttons. The alarms cannot be configured or
controlled via the fieldbus.
Device Description files for the BA688CF-F
FOUNDATION™ fieldbus display may be
downloaded from either the Fieldbus Foundation or
from the BEKA associates websites.
Fig 1 Simplified block diagram of BA688CF-F
2.1 Controls
The user can scroll through the display screens by
operating the ▼or ▲push buttons. The number
of screens available depends upon how the
BA688CF-F 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-F, 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. The Last Input parameter allows
unused inputs to be skipped when scrolling
through the instrument display screens, see
section 5.7.5.
If enabled, operating the Pand ▲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.
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3. SYSTEM DESIGN
The BA688CF-F FOUNDATION™ fieldbus display
may be connected to any fieldbus segment as
shown in Fig 2 providing it can provide the
additional 25mA required to operate the
instrument.
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 5.7.6.
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-F FOUNDATION™ fieldbus
display is disconnected from the fieldbus, or the
fieldbus is de-energised all the alarm outputs will
open irrespective of how they have been
configured.
5

4. INSTALLATION
4.1 Location
The BA688CF-F FOUNDATION™ fieldbus display
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-F 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-F liquid crystal display has
maximum contrast when viewed from directly
ahead and slightly below the centre line of the
instrument.
Fig 4 BA688CF-F dimensions
4.2 Installation Procedure
a. Insert the BA688CF-F 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. Recommended
tightening torque is 22cNm (1.95lbf in). Do
not over tighten. 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
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4.3 EMC
The BA688CF-F complies with the requirements of
the European EMC Directive 2014/30/EU. For
specified immunity all wiring should be in screened
twisted pairs with the screens connected to the
plant’s potential equalising network.
7

5. DISPLAY & ALARM CONFIGURATION
5.1 Display transducer block
In addition to loading the BA688CF-F
FOUNDATION™ fieldbus display Device
Description files onto the system host, the eight
inputs require individual configuration.
Each of the four inputs of the two Display
Transducer Blocks has the following fieldbus
configurable parameters:
Bargraph_Min Defines bargraph lower limit
Bargraph_Max Defines bargraph higher limit
Display_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
Zero_offset Adds a positive or negative
offset to the fieldbus variable
before it is displayed.
Gain_factor Multiplies the fieldbus variable
by a factor before it is
displayed.
Display = (Gain factor x fieldbus variable) + Offset
Descriptor Displayed fieldbus variable
identification. Up to 16
characters can be accepted but
the number displayed varies
depending upon the display
screen selected.
Units Displayed units of
measurement. Up to 8
characters can be accepted,
but the number displayed
varies depending upon the
display screen selected.
IN_value Fieldbus value to be displayed
IN_value_status Indicates validity of displayed
fieldbus value.
5.2 Screen selection and alarm configuration
Screen selection and, if fitted, alarm configuration
is performed 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.
5.3 Default configuration
Unless otherwise requested at the time of ordering,
BA688CF-F FOUNDATION™ 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
Status text On
Last input 8
Revision Revision 3
(2 x IS function
blocks)
8

5.4 Accessing the instrument configuration
menu.
Throughout this manual push buttons are shown in
italics e.g. PE▼▲and legends displayed by
the instrument are shown within inverted commas
e.g. 'Enter Access Code'. Operating the Pand E
push buttons simultaneously accesses the display
configuration menu. If the BA688CF-F 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-F will request that the access code be
entered.
Using the ▼or ▲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 ▼and
▲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 one
level.
A flashing highlight indicates that an option or
alphanumeric character may be selected using the
▼and ▲buttons and entered using the Ebutton.
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 ▼or ▲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 ▼
and ▲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-F to the operating mode.
5.5 Screen selection
The BA688CF-F 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-F configuration at the
fieldbus system host – see the FOUNDATION™
fieldbus Interface Guide.
This sub-menu allows one of eleven standard
display formats to be selected. The standard
formats contain one, two, three, four or eight
fieldbus variables some with bargraphs as shown
below.
One variable
Two variables
Four variables
Eight variables
One variable + horizontal bargraph
Two variables + horizontal bargraphs
9

One variable + vertical bargraph
Two variables + vertical bargraphs
Three variables + vertical bargraphs
Four variables + vertical bargraphs
Eight variables + horizontal bargraphs
10

5.6 Alarm configuration
Note:Alarm menus are only included when the
BA688CF-F is fitted with optional alarm outputs.
Outputs are locally activated from the fieldbus
variables and are configured via the instrument
menus and push buttons. They cannot be
controlled via the fieldbus.
Each of the six alarms may be linked to any one of
the eight fieldbus variables displayed by the
BA688CF-F. 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 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.
5.6.1 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
normally open or closed output. No adjustments
can be made in this sub-menu.
5.6.2 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.
5.6.3 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 ▼or ▲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 ▼or ▲button to toggle the setting.
Enter the selection by pressing the Ebutton.
Each alarm 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 5.6.1.
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5.7 Display configuration
5.7.1 Settings
The backlight brilliance and display contrast are
adjustable from this sub-menu.
5.7.2 Quick Access
This sub-menu enables the Quick Access Menu
which is described in sections 2.1 & 5.8. When
enabled, an operator can adjust the display
contrast and backlight brilliance without having
access to any other conditioning menus.
5.7.3 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.
5.7.4 Status Text
The two single variable screens 1 and 4 will show
the status of the FOUNDATION™ fieldbus variable
as ‘Good’ or ‘Bad’ if the Status Text function is
activated.
5.7.5 Last Input
This function allows the maximum number of
FOUNDATION™ fieldbus variables to be defined
so that unused inputs are skipped when the
display is scrolled in the operating mode.
5.7,6 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-F
front panel push buttons. The table below shows
the function of the BA688CF-F front panel and the
external push buttons for each of the four options
that may be selected in the Keys sub-menu.
For applications where the instrument is only
displaying 1, 2, 3, 4 or 8 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.
5.7.7 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.
5.7.8 Unit Info
Displays the instrument model number and the
firmware version.
5.7.9 Defaults
This function enables the display and interface
board factory defaults to be restored.
5.7.10 Display Defaults
This function restores the display defaults defined
in section 5.3.
CAUTION
Existing settings cannot be recovered
after this function has been used.
5.7.11 Interface Board Defaults
This function restores the Fieldbus Interface Board
factory defaults.
CAUTION
Do not use this function when the
BA688CF-F is connected to an
operational fieldbus, as communication
will be terminated.
5.8 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 ▲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-F will request that the
access code be entered.
The backlight brilliance is adjusted using the ▼
and ▲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.
12

13

6. MAINTENANCE
6.1 Fault finding during commissioning
If a BA688CF-F FOUNDATION™ fieldbus display
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-F does
not have correct
protocol.
Instrument
configuration at
host.
That BA688CF-F
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
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
6.2 Fault finding after commissioning
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
If a BA688CF-F fails after it has been functioning
correctly, the table shown in section 6.1 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.
6.3 Servicing
We recommend that faulty BA688CF-F
FOUNDATION™ fieldbus displays are returned to
BEKA associates or to our local agent for repair.
6.4 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.
6.5 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.
6.6 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.
14

7. ACCESSORIES
7.1 Tag number
The BA688CF-F 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.
7.2 FOUNDATION™ fieldbus Interface Guide
The BEKA FOUNDATION™ fieldbus Interface
Guide which may be downloaded from the BEKA
web site at www.beka.co.uk contains configuration
information for all BEKA FOUNDATION™ fieldbus
products.
15