Pepperl+Fuchs KFU8-FSSP-1.D-Y User manual

KFU8-FSSP-1.D-Y
Frequency voltage converter
(40 kHz version)
FACTORY AUTOMATION
MANUAL

With regard to the supply of products, the current issue of the following document is ap-
plicable: The General Terms of Delivery for Products and Services of the Electrical Indus-
try, published by the Central Association of the Electrical Industry (Zentralverband
Elektrotechnik und Elektroindustrie (ZVEI) e.V.) in its most recent version as well as the
supplementary clause: "Expanded reservation of proprietorship"
KFU8-FSSP-1.D-Y

KFU8-FSSP-1.D-Y
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1 Safety ........................................................................................... 4
1.1 Introduction .......................................................................................... 4
1.1.1 Contents ............................................................................................ 4
1.1.2 Target Group, Personnel .................................................................... 4
1.1.3 Symbols Used.................................................................................... 4
2 Product Description ................................................................... 6
2.1 Device description ............................................................................... 6
3 Operation..................................................................................... 7
3.1 Operating mode ................................................................................... 7
3.2 Setup mode .......................................................................................... 7
4 Anhang ...................................................................................... 12
4.1 Terminal assignment ......................................................................... 12
4.2 Dimensions, operating and display devices ................................... 12
4.3 Connection diagram .......................................................................... 13
4.4 Functional description....................................................................... 14

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KFU8-FSSP-1.D-Y
Safety
1Safety
1.1 Introduction
1.1.1 Contents
This document contains information that you need in order to use your product throughout the
applicable stages of the product life cycle. These can include the following:
■Product identification
■Delivery, transport, and storage
■Mounting and installation
■Commissioning and operation
■Maintenance and repair
■Troubleshooting
■Dismounting
■Disposal
The documentation consists of the following parts:
■Present document
■Instruction manual
■Datasheet
Additionally, the following parts may belong to the documentation, if applicable:
■EU-type examination certificate
■EU declaration of conformity
■Attestation of conformity
■Certificates
■Control drawings
■Additional documents
1.1.2 Target Group, Personnel
Responsibility for planning, assembly, commissioning, operation, maintenance, and
dismounting lies with the plant operator.
Only appropriately trained and qualified personnel may carry out mounting, installation,
commissioning, operation, maintenance, and dismounting of the product. The personnel must
have read and understood the instruction manual and the further documentation.
Prior to using the product make yourself familiar with it. Read the document carefully.
1.1.3 Symbols Used
This document contains symbols for the identification of warning messages and of informative
messages.
Note!
This document does not substitute the instruction manual.
Note!
For full information on the product, refer to the instruction manual and further documentation on
the Internet at www.pepperl-fuchs.com.

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Safety
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Warning Messages
You will find warning messages, whenever dangers may arise from your actions. It is mandatory
that you observe these warning messages for your personal safety and in order to avoid
property damage.
Depending on the risk level, the warning messages are displayed in descending order as
follows:
Informative Symbols
Action
This symbol indicates a paragraph with instructions. You are prompted to perform an action or
a sequence of actions.
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warning!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt the device and any connected systems and plants, or result in
their complete failure.
Note!
This symbol brings important information to your attention.

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Product Description
2 Product Description
2.1 Device description
The frequency voltage/current converter KFU8-FSSP-1.D-Y is a device for displaying and
monitoring periodical signals which occur in almost all areas of process automation, i.e. from
general frequencies to specific speeds.
The input signals are evaluated and converted into a frequency or speed by a powerful -
controller in accordance with the cycle method. The -controller calculates a voltage or current
value proportional to the input frequency and produces it with a digital/analog converter in
accordance with the selected limit value of the measurement range.
You can select either of the following analog signals:
■0V...10V
■2V...10V
■0mA...20mA
■4mA...20mA
The pulse output produces the input frequency which is subdivided by the adjustable factor of
1 ... 9999.
Furthermore, in applications involving slow processes, where sensors deliver multiple pulses
per revolution, it is possible to automatically operate with the actual speed of the drive by
specifying the number of pulses per revolution.
The input or output signal is displayed on a 7-segment LED display on the front of the device.
The display has 4 digits and up to 3 decimal places. The parameterization is performed using
the 4 buttons below the display.
The frequency voltage/current converter is supplied with 24 VDC.
Note!
Close attention was paid to the special case of speed measurement during the development of
the device. The indicators and inputs can therefore occur in Hz or in rpm.
Note!
All currently available two, three or four-wire proximity switches and incremental rotary
encoders are acceptable as sensors.

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Operation
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3Operation
3.1 Operating mode
Signal frequency
The frequency voltage/current converter processes input signals of 0.002 Hz ... 40000 Hz or
speeds of 0.01 rpm ... 9999 rpm. Signals not having a duty rate of 1:1 must have a minimum
pulse pause or pulse duration of 12 s in order to be detected with certainty behind the input
filter.
Measurement underrange, message
This message appears when no input signal is recognized.
Measurement overrange, message
The preset display and measurement range was exceeded.
Very low signal frequencies, displayed value is not valid,
message
During the measurement of very low signal frequencies, the measuring system has detected
that the signal has fallen below the last computed frequency. The time between the last two
signal edges has already elapsed. The device is now waiting for the next positive signal edge in
order to compute the next measured value. Here, 'XXX' represents the positions of the first
three digits of the last measured value.
Self test, message
When the power supply is switched on, the device performs a self test. The message appears
when it is established that there is an error, for example during the check summation of the
EEPROM data; in this state, the output relay behaves as if there has been a power failure. The
error message can be cleared by switching the supply voltage off and on again.
Error message
1. Enter the parameters again.
2. Switch the device off and back on again.
The normal function of the output relay is restored.
3.2 Setup mode
see Figure 4.2 on page 14
Transition operating mode setup mode
Starting setup mode
Press the "Mode" and "+" buttons at the same time.
The display shows the parameters in text form.
Note!
Select a wider measurement range.
Note!
If, when switching on again, the error message appears, then the factory presets were
loaded.

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Operation
Transition setup mode operating mode
Exiting setup mode
Press the "Enter" and "+" buttons at the same time.
The parameters are stored in an EEPROM in a non-volatile manner.
Button functions for the parameter display
Button functions for the parameter value display (one digit flashes)
Function selection
(factory preset: Rotational speed measurement in rpm)
2 measurement functions are available:
1. Frequency measurement in Hz (parameter value = 0)
The established cycle duration of the input signal is converted into a frequency in Hz
through the formation of a reciprocal value.
Range: 0.002 Hz ... 9999 Hz
2. Rotational speed measurement in rpm (parameter value = 1)
The signal frequency calculated from the cycle duration is multiplied by 60, then divided by
the pulse divider amount (PULS parameter) and displayed in rpm.
Range: 0.01 rpm ... 9999 rpm
Pulse divider
(factory preset: 1 pulse/revolution)
Applications involving slow processes are frequently equipped with sensors which provide
several pulses per revolution. In the rotational speed measuring function, the device
undertakes the conversion to the actual value of rpm by inputting the numerical value (of
pulses/revolution), i.e. both the indication and the input of the measurement range end value
are obtained from the actual rate of rotation of the drive.
Range: 1 ... 1200
Note!
You can modify the parameters in the parameter value display (flashing digits). The parameters
come into effect temporarily until the operating voltage is interrupted.
"+" Switch to next parameter.
"-" Switch to previous parameter.
"Mode" Switch modes of parameter display.
"Enter" and "+" Closes parameter editor and stores all parameters in the EEPROM.
"+" Increase the value of the flashing digit.
"-" Decrease the value of the flashing digit.
"Mode" Move flashing digit.
"Enter" and "+" Transfer from parameter value display to parameter display.
Note!
The pulse separator is only active for rotational speed measurement.

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Operation
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Measurement range full scale reading
(factory preset: 9999)
In frequency measurement, the set value is measured in Hz or in speed measurement it is
measured rpm (depending on function selection) it determines the frequency or speed at the
analog output of the maximum voltage of 10 V or the maximum current of 20 mA.
Range: see display and measurement range.
Te a c h i n g i n
Press the "Mode" button only and then press "Enter".
The frequency or speed of the current pending input signal are taught in.
Analog output
(factory preset: 0 V ... 10 V)
Selection of the analog output signal. You can only use the current output (terminals 5 and 6) or
current output (terminals 4 and 5).
Display function
(factory preset: frequency or speed)
The display shows the determined frequency or speed in Hz and rpm (depending on Function
selection) or the output voltage in V.
Display rate
(factory preset: 0.33 s)
In order to ensure good readability of the display, the time taken to indicate the current
measured value in the display can be selected between 0.01 s and 2.5 s.
Display and measurement range
(factory preset: 0 ... 9999)
Parameter value Analog output
00 V ... 10 V
12 V ... 10 V
20 mA ... 20 mA
34 mA ... 20 mA
Display function Function selection Analog output Display
0 0 - Frequency in Hz
1 - Rotational speed in
rpm
1 - 0 Voltage in V
- 1 Voltage in V
Note!
The display rate influences neither the time required to calculate the measured value nor the
switching characteristics of the output relay.

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KFU8-FSSP-1.D-Y
Operation
Four measuring and display ranges are available for frequency measurement and three
measuring and display ranges are available for speed measurement:
Example:
The maximum permissible rotational speed of the drive is 600.5 rpm. You can select the first
two measuring ranges. Select the second measurement range in order to fully utilize the
accuracy of the display.
Message
This message appears when an attempt has been made to change the range in such a way
that previously input limiting values lie outside the display and measuring range, or the
respective places following the decimal point would be cut off.
Division factor for the pulse output
(factory preset: 1)
If the division factors is set to 1, the pulse output goes to high level approx. 10 s after the
positive slope of the input signal and to low level approx. 10 s after the negative slope.
Figure 3.1 Division factor 1
With division factors greater than 1, the pulse output goes to approx. 20 s after the first
positive input signal slope.
For even division factors the output level goes approx. 20 s after the ‘division factor’/2-period
to low level for the following periods.
Figure 3.2 Division factor 4
For uneven division factors the output level goes approx. 20 s after the (‘division factor’-1)/2
period to low level for the following periods.
Display in parameter
editor
Frequency range in
Hz Speed range in rpm
Number of decimal
places
0000 0 ... 9999 0
000.1 0,0 ... 999,9 1
00.02 0,0 ... 99,99 2
0.003 0,0 ... 9,999 ---- 3
approx. 10 µsapprox. 10 µs
approx. 20 µsapprox. 20 µs
Example:
division factor = 4
output level high:
4/2 = 2 periods
2 periods
4 periods