fafnir VISY-Command (VI-4) Guide

FAFNIR GmbH •Schnackenburgallee 149 c •22525 Hamburg •Tel.: +49 / 40 / 39 82 07-0 •Fax: +49 / 40 / 390 63 39
Technical Documentation
VISY
VISY-Command (VI-4)
Version: 7
Edition:
2019-02
Art. no.: 207184

I Table of contents
Table of contents
1Introduction............................................................................................... 1
1.1 Related documentation............................................................................................................................2
1.2 Requirements for service engineers ....................................................................................................2
1.3 Safety instructions......................................................................................................................................3
2Versions of the VISY-X system................................................................. 4
2.1 Wired version...............................................................................................................................................4
2.2 Wireless version / radio system ............................................................................................................4
3VISY-Command ......................................................................................... 5
3.1 Design and function ..................................................................................................................................5
3.1.1 VISY-Command – wired version (standard)......................................................................................5
3.1.2 VISY-Command RF – wireless version (radio system)...................................................................6
4Installation ................................................................................................. 7
4.1 Assembly........................................................................................................................................................7
4.1.1 Sensor connections....................................................................................................................................7
4.1.2 VISY-Command – wired version (standard)......................................................................................7
4.1.3 VISY-Command RF – wireless version (radio system)...................................................................9
4.2 Interface connections................................................................................................................................9
4.3 Service interface..........................................................................................................................................9
4.3.1 Host interface............................................................................................................................................ 10
4.3.2 Extension interface (RS-485)................................................................................................................ 11
4.3.3DIP switch S2 for bias (RS-485 host/extension) ...........................................................................12
4.4 Supply voltage connection...................................................................................................................12
4.5 Status display.............................................................................................................................................13
4.5.1 Status messages....................................................................................................................................... 13
4.6 Reset button ..............................................................................................................................................17
5Configuration ..........................................................................................17
6Replacing components ...........................................................................17
7Maintenance ............................................................................................17
7.1 Return shipment....................................................................................................................................... 17
8Technical Data..........................................................................................18
9List of figures...........................................................................................18

Table of contents II
10 List of tables.............................................................................................18
11 Annex........................................................................................................19
11.1 EU Declaration of Conformity VISY-Command............................................................................19
11.2 EU Declaration of Conformity VP-1, VP-2 and VP-4 ..................................................................21
11.3 EU Declaration of Conformity VI-4.................................................................................................... 22
11.4 EU-Type Examination Certificate VP-1, VP-2 and VP-4............................................................. 23
11.4.1 Instructions VP-….....................................................................................................................................26
© Copyright:
Reproduction and translation are permitted only with the written consent of the FAFNIR GmbH. FAFNIR GmbH
reserves the right to carry out product alterations without prior notice.

Page 1/28 Introduction
1Introduction
The VISY-X system (Volume Information SYstem) provides highly precise and continuous level
measurements for all commercially available fuels in up to 16 tanks. Simultaneously the
product temperature and the water level at the bottom of the tank are measured.
The system includes:
•VISY-Command (central unit)
•VISY-Setup (software application) for configuring the VISY-Command
•VISY-Stick (filling-level sensors) for tank gauging in the versions:
VISY-Stick, VISY-Stick Advanced, VISY-Stick Advanced with VISY-Density Module,
VISY-Stick Flex, VISY-Stick LPG (liquefied petroleum gas), …
In addition, following environmental sensors can also be operated with the VISY-X System:
−VISY-Stick Sump for monitoring the manhole or the dispenser sump with the distinc-
tion between product and water
−VISY-Reed Sump for monitoring the manhole or the dispenser sump without a dis-
tinction between liquids
−VISY-Stick Interstitial (with configurable measuring range) for monitoring the inter-
mediate chamber in double-walled tanks
−VISY-Reed Interstitial (with fixed measuring points) for monitoring the intermediate
chamber in double-walled tanks
−VISY-Stick Temp for temperature measurement with up to 31 integrated temperature
sensors depending on the probe length
−VIMS Sensors (VIMS-Tank , VIMS-Product Pipe, VIMS-Delivery Pipe) for monitoring
the intermediate chamber in double-walled tanks, filling lines and product lines from
our system partner SBG GmbH, see chapter 1.1
−COMS (Continuous Oil separator Monitoring System) with VISY-Stick Oil separa-
tor and VISY-Sludge probes for monitoring the oil and sludge layer in oil separators,
see chapter 1.1
−VPS for monitoring of pressures
The VISY-Command central unit is installed in the petrol station building outside the potential-
ly explosive area.
The VISY probes are to be connected with the VISY-Command. VISY-Command collects data
from the probes and transmits this to a higher-level system (e.g. POS) on request.
In this manual, you will be guided through the installation and commissioning of the VISY-
Command.

Introduction Page 2/28
1.1 Related documentation
Before configuring and operating the VISY-Command central unit, the level and environmental
sensors must be installed and connected to it. The VISY-Command is then configured with the
VISY-Setup software via a PC or notebook. Please also observe the additional instructions in
the following technical documentation:
VISY-Setup V4…, art. no. 207158
VISY-Stick VISY-Reed, art. no. 207194
For the installation and commissioning of the VIMS sensors please contact:
SGBGmbH, Hofstraße 10, 57076 Siegen, Germany
Tel.: [phone], Fax: [phone], E-mail: [email protected]
The VISY-SoftView software application is used for the display module in the VISY-Command
GUI and in the VISY-View Touch. VISY-SoftView provides the capability to view current tank
data, delivery data and the various alarms signalled by the VISY-Command central unit. For
configuration and operation of the display module with VISY-SoftView see the following
technical documentation:
VISY-SoftView User Guide, art. no. 350026
VISY-SoftView Administrator, art. no. 350144
The probes VISY-Stick Oil separator and VISY-Sludge are used for monitoring of oil separators
(COMS Continuous Oil separator Monitoring). The sensor VISY-Stick Oil separator continu-
ously monitors the height of the light-liquid layer, VISY-Sludge continuously monitors the
height of the sludge layer. For installation and operation see the following technical documen-
tation:
COMS Technical data, art. no. 350273
COMS Installation Quick Guide, art. no. 350240
COMS oil layer table, art. no. 350007
VISY-SoftView Oil separator, art. no. 350193
1.2 Requirements for service engineers
The complete VISY-X system should only be installed by trained service engineers.

Page 3/28 Introduction
1.3 Safety instructions
The VISY-X system is optimised for use in petrol stations and is compatible with all commer-
cially available fuels. It serves to measure and evaluate the filling levels in tanks. The system
must be used exclusively for this purpose. Observe and follow all product safety notes and
operating instructions. The manufacturer accepts no liability for any form of damage resulting
from improper use.
The level and environmental sensors and the VISY-Command central unit have been devel-
oped, manufactured and tested in accordance with the latest good engineering practices and
generally accepted safety standards. Nevertheless, hazards may arise from their use.
The following safety precautions must be observed in order to reduce the risk of injury, electric
shocks, fire or damage to the equipment:
•Opening or removing the housing cover from the VISY-Command could result in a
risk of electric shock.
•Do not change or modify the system or add any equipment without the prior consent
of the manufacturer.
•Only use original parts. These comply with the technical requirements specified by the
manufacturer.
•The installation, operation and servicing of the sensors and the VISY-Command must
solely be carried out by expert personnel.
•Operators, installers and service technicians must observe all applicable safety regula-
tions. This also applies to any local safety and accident prevention regulations which
are not stated in this manual.
•The VISY-Command central unit is only suitable for wall mounting inside buildings
and must not be installed in potentially explosive areas.
•The isolating amplifiers type VP-… respectively VISY-RFR, and the interface type VI-…
included in the VISY-Command central unit must always be undamaged and clean.
•During normal operation, the casing cover of the VISY-Command central unit must
remain closed.
•The product may be powered only via the permissible auxiliary power supply.
The safety instructions in this manual are marked as follows:
If these safety instructions are not observed, it may result in the risk of accident or
damage to the VISY-X system.
Useful tips and information in this manual, you should observe, appear in italics
and are identified by this symbol.

Versions of the VISY-X system Page 4/28
2Versions of the VISY-X system
Two versions of the VISY-X system are available which differ in different data transmission
technology:
(1) The wired version
(2) The wireless version / radio system
2.1 Wired version
In most cases, data is transferred between the sensors and the VISY-Command central unit via
cable. This cable is also in charge of the voltage supply of the sensors. The wired version of the
VISY-X system is the standard version.
2.2 Wireless version / radio system
If no free cable ducts are available at the petrol station, it is possible to instead opt for the
wireless tank gauging system. In this case, the benefit of installing the wireless system is that it
does not entail any excavation work.
In the wireless system, the sensors are connected to a transmitter and powered by a battery.
The radio version of the central unit is equipped with a receiving module.
The radio system consists of the additional components:
•VISY-RFR (radio frequency receiver, receiver installed in VISY-Command … RF)
•VISY-RFT (radio frequency transmitter, transmitter with battery)
The installation procedure for the wireless system is described in the following technical
documentation:
VISY-RF III radio system, art. no. 350272

Page 5/28 VISY-Command
3VISY-Command
The designation of the VISY-Command depends on the number of sensor terminals or the
transmission technology, for example, "VISY-Command 8" with eight sensor terminals or "VISY-
Command RF" as wireless version.
3.1 Design and function
3.1.1 VISY-Command – wired version (standard)
The wired (standard) version of VISY-Command has 2, 4, 8, or 16 sensor terminals.
At each sensor terminal, it is possible to connect up to three different types of FAFNIR sensors
VISY-Stick/Reed (e.g. one VISY-Stick, one VISY-Stick Interstitial and one VISY-Reed Sump).
These three types of sensors can be connected to each other directly at the installation point.
This means that only one cable (4-wire) is required for the connection to the VISY-Command.
In combination with the VIMS sensors from our system partner for leakage control
(SGB GmbH, Siegen), either 2 FAFNIR sensors and 2 SGB sensors or 3 FAFNIR sen-
sors and 1 SGB sensor can be connected to the VISY-Command central unit using
one single cable (4-wire).
Connecting sensors of the same type (e. g. 3 x VISY-Stick or VISY-Stick Interstitial
with VISY-Reed Interstitial) to one sensor terminal is not supported.
The terminal box/cable connector used to extend the connection cables for the
sensors in the manhole chamber must comply with a degree of protection of IP68
for the housing.
The VISY-Command central unit comprises a VI-4 interface and one or two VP… isolating
amplifiers installed in a housing for wall mounting (IP20). One VP… isolating amplifier is
installed in the VISY-Command 2, 4 or 8; two VP-1 isolating amplifiers are installed in the
VISY-Command 16.
The sensors are electrically supplied with power via the VISY-Command. The VISY-Command
receives the measured values, stores this data temporarily and makes the data available to a
higher-level system (e.g. central computer). A serial interface, either an RS-232 or an RS-485,
is used for communication. Various logs are available for transmitting the data to the service
station computers.
The IFSF-LON interface is also available as an option, see the following technical documenta-
tion:
IFSF-LON interface converter, art. no. 207092

VISY-Command Page 6/28
3.1.2 VISY-Command RF – wireless version (radio system)
With the wireless version (RF), each VISY-Stick/Reed sensor is connected to one VISY-RFT
transmitter, which transmits the measured data to VISY-Command RF.
Up to 16 VISY-Stick/Reed sensors can be operated in conjunction with the VISY-Command RF.
Each sensor is electrically powered via a battery in the VISY-RFT transmitter.
The VISY-RFT transmitter must not be operated without an antenna.
If the wireless system is used, it should be noted that reception conditions may
vary with the number of cars or lorries passing through the petrol station. This
can, under certain circumstances, result in long data reception failures in the
VISY-Command. Therefore, the tank data may not always be updated at the set
transmission intervals and delivery data could potentially be lost.
For improved wireless communication, the VISY-Command RF should preferably
be equipped with two external receiving antennas.
The VISY-Command RF comprises an interface VI-4 and a wireless receiver installed in a case to
be mounted on the wall (IP20). The data received from the VISY-Command RF is evaluated,
stored temporarily and made available to a higher-level system (e.g. central computer).
Communication takes place via a serial interface, either the RS-232 or RS-485. Various logs are
available for transmitting the data to the service station computers.
The IFSF-LON interface is also available as an option, see the following technical documenta-
tion:
IFSF-LON interface converter, art. no. 207092
The installation of the wireless system is a complex installation procedure and is described in
detail in the following technical documentation:
VISY-RF III radio system, art. no. 350272

Page 7/28 Installation
4Installation
When installing and operating the VISY-Command central unit, the requirements
of the Explosion Protection Regulations, the Industrial Health and Safety Regula-
tions and the Equipment Safety Regulations as well as generally accepted rules of
engineering and these operating instructions must be observed.
Observe also the local safety and accident prevention regulations, which are not
stated in these operating instructions.
Wiring work may only be performed with the power disconnected.
4.1 Assembly
The VISY-Command central unit must be securely mounted on a wall inside a building.
The VISY-Command central unit is not suitable for outdoor installation.
For mounting the case, the VISY-Command contains the relevant drilling tem-
plate.
4.1.1 Sensor connections
4.1.2 VISY-Command – wired version (standard)
Connect the filling level and environmental sensors to the sensor terminal block on the VP-…
board (see Figure 1 and Figure 2). To feed in the cable, please use the blue cable gland for
intrinsically safe circuits.
The maximum permitted external inductance must not exceed 40 mH and the
maximum permitted capacitance must not exceed 680 nF including the cable (see
data sheet of the used cable).
The connection cable between the sensors and VISY-Command must have the following
characteristics:
•4-core unshielded, oil-resistant cable
•Cable cross-section (4 x 0.5 mm² up to 100 m or 4 x 1.0 mm² up to 200 m)
•Colour blue or marked blue (cable for intrinsically safe power circuits)
•Maximum diameter of 10 mm to fit through the cable glands in the VISY-Command.

Installation Page 8/28
zum Interface VI-4
1 3
A
B
A
-
A
+
B
-- B
N
+
A
B
Messwertgeber
++
B
N
Messwertgeber
4
+
BB
B
B
A
7
2
-
- - B
L
Hilfsenergie
-
+
A
A
L
B B
-
+
+
+
-
+
+
PE
+
A +
-
A +
--
-
Messwertgeber
8
A
(230V50Hz)
6
B
A
A
B
5
B
+
A
A
Messwertgeber
-
Messwertgeber
+
B
-
Messwertgeber
Messwertgeber
-
A
Messwertgeber
A
VP Platine
Figure 1: VISY-Command 8 with one VP-1 board for 8 sensors
VP Platine
zum Interface VI-4
1 3
9 11
A
B
A
-
A
+
B
-- B
N
+
A
B
Messwertgeber
++
B
N
Messwertgeber
4
+
BB
B
B
A
7
2
-
- - B
L
Hilfsenergie
-
+
A
A
L
B B
-
+
+
+
-
+
+
PE
+
A +
-
A +
--
-
Messwertgeber
8
A
(230V50Hz)
6
B
A
A
B
5
B
+
A
A
Messwertgeber
-
Messwertgeber
+
B
-
Messwertgeber
Messwertgeber
-
A
Messwertgeber
A
A
-
12
+
15
zum Interface VI-4
B
+
+
+
A
Messwertgeber
+
+
B
Messwertgeber
A
-
+
A
A
A
+
-
-
+
A
A
Messwertgeber
+
VP Platine
+
-
A
B
A
Messwertgeber
Messwertgeber
-
B
13
B
B
A
B
Messwertgeber
16
A
BB
-
BBBB-
-
Messwertgeber
+
+
N
4101
B
A
+
PE
+
-
- -
-
- -
A
-
A
B
+
B
A
L
Messwertgeber
Figure 2: VISY-Command 16 with two VP-1 boards for 16 sensors
Sensor terminal block
Sensor
2
Sensor
1
Sensor
3
Sensor
4
Sensor
5
Sensor
6
Sensor
7
Sensor
8
to VI-4 interface
VP board
Auxiliary power
brown
+
white
A
black
B
blue
-
Sensor terminal block
to VI-4 interface
VP board
brown
+
white
A
black
B
blue
-
Sensor terminal block
to VI-4 interface
Auxiliary power
brown
+
white
A
black
B
blue
-
VP board
Sensor
2
Sensor
1
Sensor
3
Sensor
4
Sensor
5
Sensor
6
Sensor
7
Sensor
8
Sensor
10
Sensor
9
Sensor
11
Sensor
12
Sensor
13
Sensor
14
Sensor
15
Sensor
16

Page 9/28 Installation
4.1.3 VISY-Command RF – wireless version (radio system)
The installation of the wireless version is described in detail in the manual of the VISY-RF radio
system, see the technical documentation:
VISY-RF III radio system, art. no. 350272
4.2 Interface connections
1
VISY-ICI
S2
8
1
+5V
Host
-RxD Host
4
PE
RxD Service
-TxD Erweiterung
PE
TxD Service
6
1
Reset
9 - 16
2
N
5:
Erweiterung
Tank
7
1 - 8
Vorspannung
3
-TxD Host
Service
5
L
RS-485
Messwertgeber
Display :
S1
Status der
Interface VI-4
ON
2
2
3:RxD
Service
2: TxD
3
4
O N
Figure 3: Interface VI-4
4.3 Service interface
The RS-232 serial interface (9-pin D-sub socket) can be used for the connection of three
different applications. The DIP switch S1 is used for the relevant settings:
DIP switch S1: Service
1
2
Function
OFF
OFF
Configuration of VISY-Command using the VISY-Setup software application
OFF
ON
VISY-Quick protocol (FAFNIR protocol)
ON
OFF
Auxiliary measurement system
ON
ON
No function
Table 1: DIP switch S1 settings
The RxD service LED (green) displays incoming data of the service interface.
The TxD service LED (green) displays outgoing data of the service interface.
For connecting to the service interface, a serial interface cable (standard) must be
used.
Interface VI-4
Status of the
sensor
s
Extension
Reset
Tank
Host
Bias
Extension

Installation Page 10/28
4.3.1 Host interface
The serial host interface (galvanically isolated) for communication with a higher-level system,
e.g. POS, is designed to function as an RS-232 interface or an RS-485 interface. Depending on
requirements, the host computer can be connected to the RS-232 interface or the RS-485
interface. The data protocol for the interface can be selected using the VISY-Setup software
application and is determined by the host code entered. The VI-4 interface automatically
recognises the interface to which the host computer is connected.
Connect the host computer to the corresponding terminals of the host interface, as shown
below.
Figure 4: Host interface
A simultaneous operation of the RS-232 interface and the RS-485 interface is not
supported.
If the RS-485 interface is used, it is advisable (for reasons of interference resistance) to use a 3-
wire cable in order to also be able to connect the interface ground of the VISY-Command
(terminal ⊥of the host interface) to the interface ground of the host system (if provided as a
connection terminal) in addition to the ports A+ and B-.
If shielded lines are used, the shield must be placed on the PE connection. Please also observe
the installation instructions for the device to be connected to the interface. If the shield cannot
be fitted on both sides, it is possible to work with a shield fitted to one side of the VISY-
Command only.
The RxD Host LED (red) indicates incoming data from the host computer.
The TxD Host LED (red) indicates outgoing data to the host computer.
Do not connect the line shield to the interface ground ( ⊥ /GND).
Please note that the longer the line length, the greater the probability of equipo-
tential currents flowing through a line shield earthed on both sides. Depending on
local rules and regulations, it may be necessary to provide an additional equipo-
tential bonding between the connected devices.
Extension
Host

Page 11/28 Installation
4.3.2 Extension interface (RS-485)
The extension interface is a galvanically isolated RS-485 serial port through which data can be
transmitted to other system components (e.g. VISY-View Touch if the host interface is busy).
This interface is unidirectional. This means that data is only sent from VISY-Command to the
system components connected there. The system components receive the data without having
to send a request. This means that, in contrast to bidirectional interfaces, it is possible to
connect several system components (e.g. several VISY-View Touches) to the extension interface
in parallel. Theoretically, up to 31 system components can be connected to this interface.
By default, this interface is inactive. It can be activated using the VISY-Setup application. To
determine whether other configurations are required, please refer to the technical documenta-
tion supplied with the device to be connected.
Figure 5: Extension interface
If shielded lines are used, the shield must be placed on the PE connection. Please also observe
the installation instructions for the device to be connected to the interface. If the shield cannot
be fitted on both sides, it is possible to work with a shield fitted to one side of the VISY-
Command only.
The yellow TxD LED of the extension interface indicates data being transmitted through the
extension interface.
Do not connect the line shield to the interface ground ( ⊥ /GND).
Please note that the longer the line length, the greater the probability of equipo-
tential currents flowing through a line shield earthed on both sides. Depending on
local rules and regulations, it may be necessary to provide an additional equipo-
tential bonding between the connected devices.
Extension
Host

Installation Page 12/28
4.3.3 DIP switch S2 for bias (RS-485 host/extension)
With the DIP switch S2, the RS-485 host interface (2.1./2.2) and the RS-485 extension interface
(2.3/2.4) can be biased when required, in order to achieve a significant improvement of
communication security.
DIP switch S2: RS-485 bias
1
2
3
4
Function
OFF
OFF
OFF
OFF
Bias off (factory setting)
ON
ON
OFF
OFF
Host bias
OFF
OFF
ON
ON
Extension bias
ON
ON
ON
ON
Host and extension bias
Table 2: DIP switch S2 configuration
In an RS-485 network, only one bias point is permitted. For this reason, leave the
switches in the OFF position if another device is already biasing the network.
Figure 6: DIP switch S2
4.4 Supply voltage connection
The auxiliary power (electrical connection) must be supplied using fixed wiring (not via a
connector), and is ducted through the lower right cable gland. Connect the power supply to
the provided terminal blocks (see Figure 1).
A(+)
RS-485
B(-)
+5V
GND
ON/OFF
ON/OFF
820 
820 

Page 13/28 Installation
4.5 Status display
After switching on or resetting the VI… interface, the firmware checksum is initially checked. If
an error in the firmware is detected, the display shows permanently SE (Signature Error).
Otherwise, the firmware version of the interface is displayed. This is shown in form of three
numbers displayed in sequence, e. g. 4 – 2 – 3 represents version 4.2.3.
If no sensor has been configured yet, the display will show 99 continually. If, however, sensors
have been configured, for each and every configured terminal of the VP-… isolating amplifier,
first the terminal number and then the type of sensor represented by a symbol will be dis-
played one after the other (see following table):
o=
VISY-Stick fitted in the tank
b=
VISY-Stick/Reed Interstitial (monitoring of the intermediate chamber in double-walled
tanks)
c=
VISY-Stick/Reed Sump (monitoring of the manhole)
d=
VISY-Stick/Reed Sump (monitoring of the dispenser sump)
P=
VPS pressure sensor
S=
VISY-Sludge
T=
VISY-Stick Temp (temperature measurement with up to 31 temperature sensors)
(=
VIMS Tank (monitoring of the intermediate chamber in double-walled tanks)
l=
VIMS Product Pipe (monitoring of intermediate chamber in double-walled product pipes)
)=
VIMS Delivery Pipe (monitoring intermediate chamber in double-walled filling pipes)
%=
VISY-Input
&=
VISY-Output
Table 3: Sensor symbols
VIMS sensors cannot be operated with the VISY-Command RF.
Finally, the status of the various sensors is displayed in the form of a number (see below).
4.5.1 Status messages
As soon as configuration has been completed with the VISY-Setup, you can monitor the
operation of the sensors using the status display on the VI-4 interface. The display consecu-
tively shows the terminal number of a particular sensor, a symbol and the associated status
(e. g. „So= O“ means “VP board terminal no. 5 with VISY-Stick under operation”). In this case,
one sensor after another is then scanned in an endless loop.

Installation Page 14/28
Code
Message (VISY-Setup)
Description

Possible cause
Required action
0
Probe running

No measures required.
1
Probe not running
The measured values are no longer being
recorded and are set to “0” by the central
unit.

If this status is displayed permanently,
it must be assumed that the sensor is
defective.
The sensor must be replaced.
5
Probe cannot determine temperature
The central unit is no longer capturing the
temperature and sets the value to 0.0 °C.
The temperature compensation of the
filling volume is no longer being carried
out. The product and water level continue
to be processed.

If this status is displayed permanently,
it must be assumed that the sensor is
defective.
The sensor must be replaced.
6
Probe cannot determine filling level
The product level and water level are set to
“0” by the central unit, the temperature will
continue to be transmitted.

If this status is displayed permanently,
it must be assumed that the sensor is
defective.
The sensor must be replaced.
7
Reduced measuring accuracy
All measured values are being processed
normally. However, it must be assumed
that total measurement accuracy is not
being achieved.

Powerful fluid movements prevent a
fully accurate measurement. This may
be the case during fuel deliveries, for
example.
No measures required.
8
Relevant to wireless mode only:
Checksum error:
Probe - RF-transmitter
The VISY-RF transmitter is reporting an
error communicating with the sensor. The
central unit is not receiving data from the
sensor.

Dirty or damaged plug-in connection,
loose connection, strong interference
radiation, or VISY-RF transmitter defec-
tive.
Check cable and plug-in connection,
replace VISY-RFT transmitter, replace
sensor, check surrounding area for
powerful sources of radiation (e.g.
three-phase supply cables, motors).
9
Relevant to wireless mode only:
RF-transmitter has no communication with
probe
The VISY-RFT transmitter is reporting that
the sensor is no longer responding.

Dirty or damaged connection, connec-
tion cable defective, sensor or VISY-RFT
transmitter defective.
Check cable and plug-in connection,
replace VISY-RFT transmitter, replace
VISY-Stick/Reed.

Page 15/28 Installation
Code
Message (VISY-Setup)
Description

Possible cause
Required action
10
Checksum error:
Probe - Control Unit
The central unit displays an error message
when communicating with the sensor or
the RF receiver.

In case of wired operation, the cable
connection (also connectors and termi-
nals) to the sensor is loose, dirty, or
damaged, or there is severe interfer-
ence.
In wireless mode, the cable connection
(also connectors and terminals) be-
tween RF receiver and VI-4 interface is
loose, damaged, or there is severe
interference.
Check cables, plug-in connections and
terminal connections.
In wired mode, replace sensor, VP-…
isolating amplifier, VI-4 interface.
In wireless mode, replace RF receiver,
VI-4 interface. Check surrounding area
for powerful sources of radiation (e.g.
three-phase cables, power switches,
etc.).
11
No communication with probe
The central unit is no longer able to
establish data communication with the
sensor. The measured values are not being
captured and are set to "0" by the central
unit.

Sensor not connected / available /
defective, wiring fault, incorrect serial
number configured for the sensor,
central unit (VI-4 interface or VP-…
isolating amplifier) defective.
Take the necessary measures as
appropriate to the possible causes.
12
Incompatible data
There are no transmission errors in the
data communication with the sensor, but
the central unit cannot interpret the data.
The measured values are not being
captured and are set to "0" by the central
unit.

The sensor or the particular version of
the sensor is not supported by the
central unit.
Ask the manufacturer whether the
sensor and the central unit are compat-
ible, and whether any updates are
available. When doing so, please have
the type and version number of the
central unit, and the type, serial num-
ber and/or version number and possi-
bly the model of the sensor (e.g.
number of floats or density measure-
ments installed) to hand.

Installation Page 16/28
Code
Message (VISY-Setup)
Description

Possible cause
Required action
13
Relevant to wireless mode only:
Waiting for first wireless transmission
After switching on or resetting, the VISY-
Command RF is reporting that no data has
been received from the sensors.

Data from the sensors is only being
transmitted periodically.
Not required because of normal
reset/switch-on behaviour. If data is still
not being received following the lapse
of the configurable timeout in the
VISY-Command (1 – 99 hours), the
status automatically changes from 13
to 11.
99
Probe not configured
The central unit assumes that the sensor is
not connected. No data communication is
taking place via the relevant connection
point (tank 1 … 16). All the measured
values for this connection are set to "0".

When the central unit is delivered, all
the connected sensors/tanks show this
status initially. In order for communica-
tion with a sensor to be established
through a particular terminal, it is nec-
essary to enter the serial number of the
sensor and also the type of product. If
this status is displayed, either one or
both of these items of data have not
been input.
The central unit must be configured by
using the VISY-Setup.
--
Reset central unit
The central unit is not working. During a
reset, there is no communication with the
sensors, host and VISY-Setup. Here, the
VISY-Setup is reporting that the central
unit is no longer responding.

The central unit is reset by its switch-
ing-on or pressing the reset button. If
this status is displayed permanently,
even after you have pressed the reset
button, it should be assumed that the
central unit (VI-4 interface) is defective.
Replace the VI-4 interface inside the
central unit.
Table 4: Status messages

Page 17/28 Configuration
4.6 Reset button
This button can be used to trigger a reset of the VI-4 interface. All saved settings will be
retained.
5Configuration
After installation, the VISY-Command has to be configured using the VISY-Setup software
application. Please follow the relevant instructions in the following document:
Technical documentation VISY-Setup V4…, art. no. 207158
6Replacing components
VI-4 interface and VP-… isolating amplifier can be replaced each as complete assembly units.
The boards are mounted on a support rail from which they can be easily removed using a
screwdriver.
7Maintenance
7.1 Return shipment
Before returning any FAFNIR equipment, the Return Material Authorization (RMA) from FAFNIR
customer service is required. Please contact your account manager or the customer service to
receive the instructions on how to return goods.
The return of FAFNIR equipment is possible only with authorization by the FAFNIR
customer care.