vse IO.flow User manual

Operating instructions

TABLE OF CONTENTS
Page
With the publication of these operating instructions, all information from previous publi-
cations becomes invalid. VSE reserves the right to make changes and deviations. VSE
accepts no liability for possible printing errors. Reproductions, including excerpts, are
only permitted with the written consent of VSE. VSE reserves the right to make technical
changes at any time. Status: 02/2023
1. Important information and legal notices ...............................3
2. Features ...........................................................4
3. Technical data ......................................................4
Electrical operating conditions ................................................4
Signal input specifications (flowmeter) ..........................................5
IO-link specification .........................................................5
Identification data of the device ...............................................6
Mechanical properties .......................................................6
4. Connection data ....................................................7
5. Initial setup ........................................................8
Example configuration .......................................................9
Data-storage mechanism (device replacement) ..................................9
6. Advanced features .................................................10
Linearization ..............................................................10
Frequency filter ............................................................11
Pulse filter function..........................................................11
Change of flow direction ....................................................11
Encoder properties – number of channels ......................................12
Peak flowrate monitoring ....................................................12
7. Events ............................................................12
Limits .....................................................................12
Flow monitoring............................................................12
Standstill detection .........................................................12
Negative flow detection.....................................................13
Maintenance and diagnostic data ............................................13
8. Errors ............................................................14
9. Parameter description..............................................14
Process data structure.......................................................14
Process data in ............................................................15
Process data out ...........................................................15
Device parameters .........................................................16
System commands..........................................................22
10. Revision history ...................................................23
11. Manufacturer declaration...........................................24

3
1. IMPORTANT INFORMATION AND LEGAL NOTICES
Dear customer, dear user,
This operating instruction for the IO-Link converter „IO.flow®by VSE Volumentechnik GmbH (VSE) contains information
required to properly install and commission the device for the intended purpose.
Any installation, commissioning, operation, maintenance and testing may only be carried out by trained and authorized
personnel. The operating instructions must be read and followed carefully to ensure a trouble-free, proper and safe
operation of the device. In particular, the safety instructions are essential.
These operating instructions must be kept safe and accessible for the authorized personnel at all times. At no time
should contents of the operating instructions be removed. A missing manual or missing pages must be replaced im-
mediately if lost. The operating instructions can be requested at any time from VSE or downloaded from our website
www.vse-flow.com. The operating instructions must be passed on to each subsequent user of the IO-Link converter
„IO.flow®“.
This operating instruction is not subject to any modification service by VSE. VSE reserves the right to make technical
changes at any time without notice.
VSE makes no warranties, express or implied, with respect to commercial qualities and suitability for a particular
purpose.
VSE accepts no liability for damage and malfunctions resulting from operating errors, failure to observe these opera-
ting instructions, improper installation, commissioning or maintenance as well as improper use of the IO-Link converter
„IO.flow®“.
The opening of the IO-Link converter „IO.flow®“is absolutely not permitted. After an unauthorized opening or rebuil-
ding as well as after a single, incorrect connection of the flow circuits of the device, the warranty as well as the product
liability by VSE expire.
Operating manual–no.: E18-07-38-005 Vers. e

4
The IO-Flow®Converter enables uncomplicated integration of all VSE
flow sensors into IO Link systems. The signals of the preamplifier are
measured by the module and converted into the desired unit so that
they are available to the IO-Link master or the programmable logic
controller (PLC) for direct further processing.
The compact module is connected „in-line“ between the flow meter
and the evaluation system. This means that it is integrated into the exis-
ting cabling with an additional M12 extension cable and thus repre-
sents a signal converter. The IO-Link protocol enables simultaneous
transmission of the process data volume and flow in the appropriate
unit, together with diagnostic and statistical data. Parameters can be
changed during operation or adapted to another flow sensor. In addi-
tion, integrated signal processing allows filtering and linearization of
the volume sensor‘s measured values.
Electrical operating conditions
2. FEATURES
3. TECHNICAL DATA
Main features:
• Accurate frequency measurement and volume counting
• Configurable signal filters (dynamic / smoothed / precise)
• Integrated calculation functions:
• Unit conversion (pulses, volume, mass)
• Linearization of flow and volume (20 linearization points)
• Recording of statistical data for maintenance notifications
• Data backup on power off
• Configurable events for flow monitoring (limit values, invalid states)
• Teach-in function for parameterization in the field
• Error messages
• Support for data storage for easy exchange of devices
• Two-channel SIO mode for quadrature signals (optional)
Parameter Symbol Value Unit Notes
Operating voltage Ub18 – 30 V Unenn = 24 V
Operating current IO-Link Mode Ib,IOL 15 mA at Ub= 24 V
Operating current SIO-Mode Ib,SIO 5mA at Ub= 24 V
Max. ambient temperature Tmax 50 °C
Burst (EN 61000-4-4) 2 kV Criterion A, 5/100 kHz
ESD (EN 61000-4-2) ±4 / ±8 kV Criterion B, contact and air
discharge
Conducted immunity
(EN 61000-4-6) 150 kHz - 80 MHz Criterion A, U0=10V
Radiated immunity EN 61000-4-3 80 Mhz - 6 GHz Criterion A, E0= 6 -10 V/m
Radiated emissions EN 55016-2-3 30 MHz - 1 GHz
Table 1: Operating conditions (electrical)

5
The module uses a communication rate of 230,4 kBaud (COM3). The
IODD is compatible with the specification version V1.1 and can be
found in the download area of our homepage.
www.vse-flow.com/en/downloads
IO-link specification
Signal input specifications (flowmeter)
Parameter Symbol Value Unit Notes
Operating voltage (flowmeter) UVS UbVSame as operating voltage Ub
Max. allowed current consumption
(flowmeter) IVS,max < 200 mA Power supply dependent
Maximum input frequency
(IO-Link Mode) fmax,IO 125 kHz
Maximum input frequency
(SIO-Modus) fmax,SIO 250 kHz IO-Link Wakeup-Request only possible up
to 25 kHz with activated SIO-Passthrough
Measurement accuracy of frequency
(lower range: 10 kHz) er,10k
0.013
0.005
0.014
%
%
%
V_Filter = 2
V_Filter = 1
V_Filter = 0
Measurement accuracy of frequency
(upper range: 100 kHz) er,100k
0.018
0.034
0.300
%
%
%
V_Filter = 2
V_Filter = 1
V_Filter = 0
Settling time of frequency filter
(V_Filter) trise
1000
350
10
ms
V_Filter = 2
V_Filter = 1
V_Filter = 0
Parameter Value Notes
Manufacturer Name VSE Volumentechnik GmbH
Manufacturer ID 1654 HEX: 0x0676
Device Name IO.flow®
Device ID 4900 HEX: 0x1324
Communication rate 230,4 kBaud COM3
Minimum cycle time 1 ms
ISDU
DataStorage
Block Parameter
supported
Preoperate M-Seq. Type TYPE_1_V_8OD 8 byte OD
Operate M-Seq. Type TYPE_2_V_2OD
9 byte PDin,
1 byte PDout,
2 byte OD
M-Seq. Capability 43 HEX: 0x2B
SIO-Mode 2-channel passthrough mode (dependent on V_SIO-Passthrough) Pin 2: QA/Pin 4: QB
Table 2: Operating parameters (Signal input)
Table 3: IODD operating parameters for IO.flow®

6
Each IO.flow®converter is equipped with a unique serial number
according to the scheme IO********. It can be found as a lasered
marking on the device’s housing and in digital form in the parameter
V_SerialNumber (Index 0x15). Additionally, the manufacturing date
of the device is stored in the read-only parameter V_MfgDate (0x4F).
If the device is paired/parametrized with a specific flowmeter, there is
a separate label on the back of the device housing. This label contains
the serial number and type of the paired flowmeter.
Identification data of the device
Mechanical properties
Figure 1: Parameter label for the paired flowmeter
Parameter Symbol Value Unit Notes
Length (total) lges 88.5 mm
Length (main body) lmain 60.4 mm
Diameter d25 mm
Weight m68 g
Protection against liquid penetration waterproof With mated connectors1
Table 4: Mechanical properties
1 Performed test: Device immersed in water (50 cm depth) for 30 min. No traces of liquid inside the device.
S/N: IOF1234ABCD
M1
2x1 (male)
60,4
88,5
M12x1 (female)
SW18 Ø25

7
Figure 2: Connector specifications and cable assignment
The two 4-pin connectors are compatible with any existing cabling and
enable simple installation of the IO-Link module. Both shielded and
unshielded cables are suitable as connection cables.
The signal output side uses a male M12 connector and connects to the
IO-Link master. On the signal input side there is a female M12 con-
nector which usually connects to a flowmeter or other device with pul-
se signal output. In SIO-mode the pin assignment is identical on both
connectors. The supply voltage, which is connected to pins 1 and 3 of
the male connector, is passed through to the same pins of the female
connector. In IO-Link mode, pin 4 represents the communication line
and pin 2 is pulled to 0 V.
4. CONNECTION DATA
.
.
.
.
12
34
12
3
4
IO-FLOW
Signal input side
(Quadrature signal)
M12
FEMALE
M12
MALE
+24 V (brown)
1
2
3
4
QA (white)
0 V (blue)
C/Q/QB (black)
Signal output side
(IO-Link)

8
The male connector of the device is usually connected to the IO-Link
master via a M12 extension cable (male/female). On the signal input
side, the preamplifier of the flowmeter is connected with another
extension cable to the female connector. The maximum cable length for
either side must be below 20 m.
At start-up, the device works in SIO-mode, in which both quadrature
signals of the flowmeter are passed through to the IO-Link side (if SIO-
Passthrough is activated, see page 19). A wake-up request from the
IO-Link master switches the device to IO-Link mode.
Using the IODD (Download → page 5) the device can be added to
the master’s configuration software, where parameters can be adjusted
and process data can be read.
Before using the device, certain parameters must be set. The setting
values depend on the specific flowmeter which is connected on the si-
gnal input side. If a flowmeter is purchased together with an IO.flow®
converter, the pairing process and configuration can be done by VSE.
The following table lists the parameters that are checked for validity.
Relevant parameters should be set when commissioning the device.
5. INITIAL SETUP
Figure 3: Schematic overview of the IO-Link system with a VSE flowmeter and IO.flow®
Note
The IO.flow®converter is unshielded per IO-Link specification. For this reason, the connected flowmeter must be grounded via the
hydraulic piping or using the earth terminal of the flowmeter.

9
The “param error” flag in the process input data will be cleared when
a valid configuration is detected. After a successful configuration of
these parameters, the device status changes to “Device is operating
properly”.
Parameter Index (HEX) Unit Requirement
V_KFactor 0x45 Imp/l KFactor ≥ 1 (V_Unit=Hz)
KFactor > 1 (V_Unit≠Hz)
V_IPF 0x46 IPF > 0
V_Qmax 0x5A l/min Qmax > 0 (V_Unit≠Hz)
V_Lin_enable 0x63 Linenable > 0,
but no lin.-points set
Parameter Description Value
V_FM-SN Flowmeter serial number 060 / 24 / 110
V_FM-Type Flowmeter type VS 0,1/16 GPO 12V-42R11/X
V_CalDate Flowmeter calibration date 21.06.2022 12:00:00
V_Unit Process data unit 1 (volume / unit: litre)
V_KFactor Calibration factor (K-Factor) 160000 Imp/l
V_IPF Interpolation factor 16
V_Qmax Maximum allowed flowrate 10 l/min
V_EncProp Number of input channels 0 (2-channel flowmeter)
Table 5: Parameters with validity check
If the IO.flow®converter is purchased together with a flowmeter, the in-
itial setup is performed by VSE and all necessary parameters regarding
the paired flowmeter are already pre-set.
In case of a separate purchase for retrofitting existing systems, the pa-
rametrization is usually carried out by the customer using an existing
IO-Link master.
If data storage is activated, all parameters that are not affected by the
connected flowmeter are backed up in the IO-Link master. In the event
of a flowmeter defect, a seamless device replacement is thus possible
without manual reconfiguration. This also enables device replacement
with a different type of flow meter. All application-specific settings such
as filter, unit and limit values are restored. After connecting a new con-
verter to the IO-Link master, the data storage download is started, and
the device is ready for use again.
Example configuration
Data-storage mechanism (device replacement)
An example configuration is shown in the following table:
Table 6: Example configuration for a VSE VS 0,1

10
Every flowmeter based on the positive displacement principle has a K-
factor which represents its resolution in the unit of pulses per litre. How-
ever, mechanical tolerances, wear and operating conditions, such as
low fluid viscosity, mean that this K-factor is not constant over the entire
flow range. This can result in measurement errors if not taken care of. To
quantify these deviations, a flowmeter can be calibrated. The results of
the calibration can then be used to eliminate the device-specific devi-
ations using a linearization table. Using this mathematical correction,
the measurement error gets eliminated which leads to a higher measu-
rement quality over the entire measuring range.
By entering the linearization data into the IO.flow converter and enab-
ling it via the parameter V_Lin_enable, the measured flow and volume
values will be output as corrected process data values. Depending on
the available calibration data, two modes of linearization can be se-
lected (K-Factor or Flowrate). The linearization table supports up to
twenty entries. All intermediate values will be linearly interpolated.
6. ADVANCED FEATURES
Figure 4: Typical error curve of a positive displacement flowmeter at low fluid viscosity
Figure 5: Linearization principle
Name Index Data type Value = 0 Value = 1 Value = 2
V_Lin_enable 0x63 SingleValue Linearization disabled (gray) f-K table (green) f-Q table
Subindex 1 .. 20
Contains X-coordinates of the linearization points.
This is the measured frequency value that serves as a reference for the corresponding Y-coordinate.
Unit in Hz.
Subindex 1 .. 20
Contains Y-coordinates of the linearization points.
Each coordinate represents the frequency dependent process value
of the attached flowmeter.
Depending on the table type it can contain K-factors or the
actual flowrate values.
f-K-Linearization: Unit in pulses per litre
f-Q-Linearization: Unit in litre per minute
Linearization
Linearization table X
Linearisierungstabelle Y
Error (%) Precision (%)
Flowrate (ml/min)
Flowrate
Frequency

11
Process data value (IO- Link)
123.4 l/ min 123.4 l/ min
0 l/ min
Wait Time
0 l/ min
Figure 6: Functionality of the pulse filter function
Using the parameter V_Filter the measurement can be adapted to the
desired accuracy and dynamic requirements. A high filter setting of “2”
is set as the default value to ensure the highest possible measurement
accuracy. Using a low filter setting, highly dynamic flow phenomena,
such as sudden flow peaks, can be detected and measured. The filter
properties are further specified in Table 2.
Oscillations in fluid systems are characterized by cyclic forward and
backward movement in the liquid domain (→ Pulsation), which is also
detected by the flowmeter and converted into proportional pulse sig-
nals and edge sequences. Depending on the application, oscillations
or vibrations can occur during standstill or discontinuous flows. The
pulses generated during the oscillation phase can be incorrectly in-
terpreted by the downstream evaluation unit or controller as a high
flow peak, which can lead to wrong measurements, if not evaluated
correctly.
The pulse filter function of the IO.flow converter continuously monitors
the output pulses during rapid forward and backward movement of the
gears or rotors of the flowmeter. On a direction change, the signals at
the channel outputs are suppressed and internally buffered until the
flowmeter position is back at the position where the filter action started
(see Figure 6). This leads to a steady standstill signal even though the
flow is pulsating without losing signal information.
With the parameter V_Impfilter_Enabled the user can set the maximum
buffer size for pulses in the negative direction. A value of “1” corres-
ponds to one gear tooth volume. A whole gear revolution is a value of
20 for the average number of teeth on VSE flowmeters.
The so called “preferred direction” is the flow direction where no fil-
tering occurs and are forwarded to the process data directly. If the
set buffer size of the pulse filter is exceeded while running in the non-
preferred direction, the preferred direction is switched over and the
measured value is output again. Simultaneously the counter function
adds the suppressed volume to the counter, so that no volume informa-
tion is lost on a direction change. To inform the user about an excee-
ded buffer count, the IO-Link event 0x1816 gets triggered. If this event
occurs too often in the application, it is advisable to increase the buffer
size of the filter.
Frequency filter
Pulse filter function
If the displayed flow value is negative although the actual flow direc-
tion is positive, the sign of the frequency measurement and pulse coun-
ter can be reversed with the parameter V_DirectionInvert.
Change of flow direction

12
The V_EncProp parameter is used to set whether the signal evaluation
of the flowmeter signals is single-channel or dual-channel. In single-
channel mode, a pulse signal is expected on pin 2 (white wire) or
pin 4 (black wire). In this case there is no direction detection, and
the measurement resolution of the volume is reduced to a quarter of
the resolution of the two-channel measurement. Furthermore, other
features such as negative flow detection and the pulse filter function
will no longer function. Pulsation in the liquid domain at standstill can
lead to an unwanted increase in the measured volume in this mode,
as each signal edge is added up.
For diagnostic purposes, the peak flowrate value is stored in the
parameter V_QPeak. If the flowrate during operation is higher than
the nominal flowrate V_Qmax of the flowmeter, this can lead to a
mechanical overload and damage to the device. In this case, the IO-
Link event 0x8C20 is triggered. Zeroing the value is done with the help
of a system command (see page 22).
Using the limit value function, events can be triggered by the IO.flow
device when the process data values (volume and flowrate) fall below
or exceed predefined limit values. If the corresponding parameter va-
lue is ≠ 0, the limit event is activated. The event remains active as long
as the condition is fulfilled.
The IO.flow®converter has various functions to detect unusual flow
events to trigger an IO-Link event. If it makes sense to use these events
depends on the specific application.
The standstill detection (V_Standstilldetection_Enabled) generates
a permanent event as long as the measured flowrate is zero. The
parameter V_WaitTime controls the delay time in milliseconds after
which the measured value of the flow is set to zero if no more pulse
edges are measured. It can be set between 100 ms and 10000 ms.
For example, clogging or a defect of the flowmeter can be detected in
the application, if a flow standstill is very unlikely due to other sensor
readings in the system (pressure sensors, pump speed).
The negative flow detection (V_NegativeDirectionDetection) gene-
rates an event if the sign of the flow value is negative, for example
if a flow in negative direction takes place. If the output of the event is
inverted, the parameter V_DirectionInvert can be used to change the
counting direction and thus swap the polarity of the event. This event
can be used, for example, to detect unwanted reverse flows in the fluid
system.
If the pulse filter function is activated (V_Impfilter_Enabled > 0), a
continuous flow against the preferred direction of the filter leads to a
change of the preferred direction and a notification event is generated.
If this event occurs too often, the oscillation in the fluid is greater than
the set filtered number of teeth and the value of the V_Impfilter_Enabled
parameter should be increased.
Encoder properties – number of channels
Peak flowrate monitoring
This function triggers an event as soon as the flowmeter stops measu-
ring pulses (depending on the V_WaitTime parameter setting). It
remains active for the entire duration of the standstill.
Standstill detection
7. EVENTS
Limits
Flow monitoring
Table 7: Events for limit values
Name Event
Code Hex
Event
Code Dec Type Duration Device Status
Volume Notify 1 (≥) 0x1810 6160 Notification Appear/Disappear 0
Volume Notify 2 (≤) 0 x1811 6161 Notification Appear/Disappear 0
Flowrate Notify 1 (≥) 0x1814 6164 Notification Appear/Disappear 0
Flowrate Notify 2 (≤) 0x1815 6165 Notification Appear/Disappear 0

13
The negative flow detection triggers an event if the flow direction is ne-
gative. It can be used to detect unwanted backflow in the application.
In the Diagnostic data menu, maintenance intervals can be set, after
which a permanent event is triggered. Two characteristic values for the
wear of the device can be used for this purpose:
The parameter V_TotalVolume stores the totalized volume which has
flown through the flowmeter in litres (only works after successful pa-
rametrization of the device). If, for example, a highly abrasive fluid is
measured, an event can be triggered after a predefined volume V_To-
talVolNotify, to indicate that a maintenance should soon be scheduled
to prevent flowmeter failure or an impaired measurement quality.
A second maintenance-relevant characteristic value are the total ope-
rating hours of flowmeter with active flow. The parameter V_OPHours
stores a TimeSpan, which is incremented every second if the flowrate
V_Flow is ≠ 0. Using the parameter V_OpHoursNotify the timespan is
defined after which the event appears.
Negative flow detection
Maintenance and diagnostic data
Table 8: Events for flow monitoring
Table 9: Other events
Name Event
Code Hex
Event
Code Dec Type Duration Device Status
Standstill 0x1812 6162 Notification Appear/Disappear 0
Direction negative 0x1813 6163 Notification Appear/Disappear 0
Pulse filter overrun 0x1816 6166 Notification Single Shot 0
Name Event
Code Hex
Event
Code Dec Type Duration Device Status
Operating hours exceeded 0x1820 6176 Warning Appear/Disappear 1
Total volume exceeded 0x1821 6177 Warning Appear/Disappear 1

14
After the device has been started, this event is triggered as the result of
a successful device self-test. Incorrect or incomplete parameterization
can prevent this event from occurring at start-up.
The parameter settings of the device are incomplete or invalid.
After resetting to factory settings, this error is active by default. The
parameters that influence the device status and this error are listed in
Table 5.
The temperature of the IO.flow®converter is too high. Causes for this
error may be external heat sources, overvoltage or internal heating
due to a short circuit. Please check the wiring and supply voltage.
The current flowrate has exceeded the flow limit V_Qmax of the flow-
meter. To avoid damage to the flowmeter, reduce the flowrate. This er-
ror message can also occur with short flow/pressure peaks.
If this event occurs, the stored parameters could not be loaded from the
remanent data memory (EEPROM) and all parameter changes are lost.
The default values are loaded.
For this IO-Link device, both process input and output data are provi-
ded. The process data structure is shown in the following figure. The
total length of the data packet is 72 bit / 9 byte. In addition to flow rate
and volume, the device status and the status of the defined limit values
are transmitted as process values.
For process data output a data packet of 8 bit / 1 byte is used.
The volume reset function will only be active if the process output data
is valid.
NO_MALFUNCTION_EVENT PARAM_ERROR_EVENT
TEMPERATURE_FAULT_EVENT
MEASUREMENT_RANGE_EXCEEDED
NVM_ERROR_EVENT
Process data structure
8. ERRORS
9. PARAMETER DESCRIPTION
Table 10: Error codes
Name Event
Code Hex
Event
Code Dec Type Duration Device Status
TEMPERATURE_FAULT_EVENT 0x4000 16384 Error Appear/Disappear 4
NVM_ERROR_EVENT 0 x 5 011 20497 Error One Shot 4
PARAM_ERROR_EVENT 0x6320 25376 Warning Appear/Disappear 3
MEASUREMENT_RANGE_EXCEEDED 0x8C20 35872 Warning Appear/Disappear 2
NO_MALFUNCTION_EVENT 0x0000 0Notification Appear/Disappear 0

15
Process data in
Process data out
2see IOL_Interface-Spec_10002_V113_Jun19 →B.2.20.1 Device Status
Name Subindex Datatype Bit length Offset
V_Flow 1Float32T 32 0
Description Rights
Process data: Flowrate value RO
Name Subindex Datatype Bit length Offset
V_Volume 2Float32T 32 32
Description Rights
Process data: Volume value RO
Name Subindex Datatype Bit length Offset
V_FlowNotifyFlag13 3BooleanT 164
Name Subindex Datatype Bit length Offset
V_FlowNotifyFlag2 4BooleanT 165
Name Subindex Datatype Bit length Offset
V_VolNotifyFlag1 5BooleanT 166
Name Subindex Datatype Bit length Offset
V_VolNotifyFlag2 6BooleanT 167
Name Subindex Datatype Bit length Offset
ParamError 7BooleanT 168
Name Subindex Datatype Bit length Offset
DeviceStatus 8UIntegerT 369
Name Subindex Datatype Bit length Offset
V_Volume_Reset 0BooleanT 1 0
Description Value: 0 Value: 1 Rights
FlowNotify1 Event Status Event not active Event active RO
Description Value: 0 Value: 1 Rights
FlowNotify2 Event Status Event not active Event active RO
Description Value: 0 Value: 1 Rights
VolumeNotify1 Event Status Event not active Event active RO
Description Value: 0 Value: 1 Rights
VolumeNotify2 Event Status Event not active Event active RO
Description Value: 0 Value: 1 Rights
ParamError Event Status Event not active Event active RO
Description Value range Rights
IO-Link Device Status2
0 Device is operating properly
1 Maintenance-Required
2 Out-of-Specification
3 Functional-Check
4 Failure
RO
Description Value range Rights
Sets the process variable
V_Volume to zero if desired
false: V_Volume not reset
true: V_Volume reset to zero RW

16
In this chapter all device parameters are described. This includes the
name, data type, bit width, storage type and write rights of the respec-
tive parameter.
The "storage" field describes whether the parameter is backed up to
the master by the data storage functionality.
Device parameters
IDENTIFICATION
VSE specific data
IO.flow®
Name Index Subindex Datatype Default value Length
V_VendorName 0x0010 -StringT VSE Volumentechnik GmbH 64 characters
Description Storage Rights
Manufacturer name - RO
Name Index Subindex Datatype Default value Length
V_VendorText 0 x 0 011 -StringT High precision
flow measurement technology 64 characters
Description Storage Rights
Manufacturer Text - RO
Name Index Subindex Datatype Default value Length
V_ProductName 0x0012 -StringT IO.flow 64 characters
Description Storage Rights
Product name - RO
Name Index Subindex Datatype Default value Length
V_ProductText 0x0014 -StringT Signal Converter from
quadrature to IO Link 64 characters
Description Storage Rights
Product Text - RO
Name Index Subindex Datatype Default value Length
V_SerialNumber 0x0015 -StringT IO*** 16 characters
Description Storage Rights
Serial number – Unique manufacturer-specific ID of the device - RO
Name Index Subindex Datatype Default value Length
V_Hardware Revision 0x0016 -StringT R* 64 characters
Description Storage Rights
Hardware revision of the device - RO
Name Index Subindex Datatype Default value Length
V_Firmware Revision 0x0017 -StringT IOF-FW-V* 64 characters
Description Storage Rights
Firmware revision of the device - RO
Name Index Subindex Datatype Default value Length
V_MfgDate 0x004F -TimeT - 64 bit
Description Storage Rights
Manufacturing date of the IO.flow®converter at VSE - RO

17
Information of the paired flowmeter
Common profile
Name Index Subindex Datatype Default value Length
V_FM-SN 0x0051 -StringT -16 characters
Description Storage Rights
Serial number of the paired flowmeter -RW
Name Index Subindex Datatype Default value Length
V_FM-Type 0x0052 -StringT -32 characters
Description Storage Rights
Type of the paired flowmeter (same as flowmeter’s type plate) - RW
Name Index Subindex Datatype Default value Length
V_CalDate 0x0050 -TimeT - 64 bit
Description Storage Rights
Date of the last flowmeter calibration -RW
Name Index Subindex Datatype Default value Length
V_Application-SpecificTag 0x0018 -StringT *** 32 characters
Description Storage Rights
Application specific tag -RW
Name Index Subindex Datatype Default value Length
V_Location-Tag 0x001A -StringT *** 32 characters
Description Storage Rights
Location tag -RW
Name Index Subindex Datatype Default value Length
V_Function-Tag 0x0019 -StringT *** 32 characters
Description Storage Rights
Function tag -RW

18
Process-settings
Teach-functions
PARAMETER
Name Index Subindex Datatype Default value Min Max
V_Unit 0x0042 -UInt16T 0 0 2
Description Storage Rights
Unit of the process data (0: pulses, 1: volume, 2: mass) Yes RW
Name Index Subindex Datatype Default value Min Max
V_IPF 0x0046 -UInt16T 1 1 65535
Description Storage Rights
Interpolation factor (IPF) of the connected flowmeter -RW
Name Index Subindex Datatype Default value Min Max
V_KFactor 0x0045 -Float32T 1.0 1.0 +∞
Description Unit Storage Rights
Calibration factor (K-Factor) of the connected flowmeter
in consideration of the IPF Imp/l -RW
Name Index Subindex Datatype Default value Min Max
V_Qmax 0x005A -Float32T 0.0 0.0 +∞
Description Unit Storage Rights
Maximum allowed flowrate of the flowmeter (see datasheet) –
Useful to detect flow peaks that are out of specification l/min -RW
Name Index Subindex Datatype Default value Min Max
V_Density 0x0047 -Float32T 1000.0 0.0 +∞
Description Unit Storage Rights
Fluid density for mass flow calculation kg/m³ Yes RW
Name Index Subindex Datatype Default value Min Max
V_VolumeNotify1 0x005B -Float32T 0-∞ +∞
Description Unit Storage Rights
Volume ≥ Volume limit 1 (0: Disabled) l/min Yes RW
Name Index Subindex Datatype Default value Min Max
V_VolumeNotify2 0x005C -Float32T 0-∞ +∞
Description Unit Storage Rights
Volume ≤ Volume limit 2 (0: Disabled) l/min Yes RW
Name Index Subindex Datatype Default value Min Max
V_FlowNotify1 0x005F -Float32T 0-∞ +∞
Description Unit Storage Rights
Flowrate ≥ Flowrate limit 1 (0: Disabled) l/min Yes RW
Name Index Subindex Datatype Default value Min Max
V_FlowNotify2 0x0060 -Float32T 0-∞ +∞
Description Unit Storage Rights
Flowrate ≤ Flowrate limit 2 (0: Disabled) l/min Yes RW

19
Functions
Name Index Storage Datatype Default value Length
V_EncProp 0x004B -UIntegerT 0 (2-channel flowmeter) 8 bit
Description Value range Rights
Number of flowmeter channels
2-channel evaluation
1: 1-channel eval. (Pin 2)
2: 1-channel eval. (Pin 4)
RW
Name Index Storage Datatype Default value Length
V_Filter 0x004D Yes UIntegerT 2 (High precision) 8 bit
Description Value range Rights
Filter dynamic / accuracy
0: Dynamic response (Medium precision)
1: Smooth response (Medium precision)
2: Heavily filtered response (High precision)
RW
Name Index Storage Datatype Default value Storage
V_DirectionInvert 0x0044 Yes BoolT false Yes
Description Value: true Value: false Rights
Invert direction of input signals Direction inverted Direction not inverted RW
Name Index Storage Datatype Default value Storage
V_Standstill
detectionEnabled 0x0049 Yes BoolT false Yes
Description Value: true Value: false Rights
Standstill detection Enabled Disabled RW
Name Index Storage Datatype Default value Storage
V_Negative
DirectionDetection 0x004A Yes BoolT false Yes
Description Value: true Value: false Rights
Negative flow direction detection Enabled Disabled RW
Name Index Storage Datatype Default value Storage
V_SIO-Passthrough 0x0059 Yes BoolT false Yes
Description Value: true Value: false Rights
Passthrough mode for quadrature signals
(IO-Link-WUR only for f<25 kHz) Enabled Disabled RW
Name Index Subindex Datatype Default value Min Max
V_WaitTime 0x004E -UInt16T 500 100 10000
Description Unit Storage Rights
Wait time – Time to pass without input pulses after which the frequency
measurement value is set to zero ms Yes RW
Name Index Subindex Datatype Default value Min Max
V_ImpfilterEnabled 0x0048 -UInt8T 0 0 255
Description Storage Rights
Pulse filter function – Number of buffered pulses/teeth (0: Disabled) Yes RW

20
Name Index Subindex Datatype Default value Min Max
V_Lin_enable 0x0063 -UInt8T 0 0 2
Description Storage Rights
Enabling and choosing the linearization mode for volume and flowrate:
0: Disabled
1: Frequency/K-Factor-Table
2: Flowrate/K-Factor-Table
-RW
Name Index Subindizes Datatype Elemente Min Max
V_Lin_X 0x0064 1 .. 20 Array of Float32T 20 -∞ +∞
Description Storage Rights
X-Values of the linearization table – dependent on the selected table type:
V_Lin_enable=1: Frequency values of the flowmeter
V_Lin_enable=2: Flowrate values of the flowmeter
-RW
Name Index Subindizes Datatype Elemente Min Max
V_Lin_Y 0x0078 1 .. 20 Array of Float32T 20 -∞ +∞
Description Storage Rights
Y-Values of the linearization table → K-Factors of the flowmeter -RW
Linearization table
OBSERVATION
Process data (unit: selectable)
Name Index Subindex Datatype Default value
V_Flow 0x0040 -Float32T 0
Description Unit Storage Rights
Current flowrate value in selected unit
Hz
l/min
kg/min
- RO
Name Index Subindex Datatype Default value
V_Volume 0x0041 -Float32T 0
Description Unit Storage Rights
Current volume in selected unit
pulses
litres
kilogram
- RO