Operating Manual

Operating Manual
Operating Manual
UF251
Signal converter analog - frequency / serial
Product features:
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
Various user modes: Programmable V / f characteristics, motorized
potentiometer function, cyclic frequency output curves etc.
Analog input configurable for voltage or current operation
Frequency outputs up to 100 kHz (HTL) resp. 500 kHz (RS422)
Very fast conversion time of approx. 1 ms
RS232 and RS485 interface for serial readout of the
conversion result and other internal registers
Adjustable floating average filter as well as operator
programmable linearization curves
Printer mode for automatic data transfer via serial interface
Power supply 18 to 30 VDC
motrona GmbH, Zeppelinstraße 16, DE - 78244 Gottmadingen, Tel. +49 (0) 7731 9332-0, Fax +49 (0) 7731 9332-30, info@motrona.com, www.motrona.com
Version:
UF25101a/ AF/HK/ July 2003
UF25101b/ KK/HK/ Jan 2005
UF25101c/ kk/nw/ May 2014
Uf251_01d_oi/Oct-15/ag
Beschreibung:
Original Version
Hint page 7: DIL switch setting with PC set up
Small Corrections
Parameter settings: wrong baud rate (2800) replaced by correct value (2400).
Safety Instructions & Technical Specifications updated. Legal notices added.
Legal notices:
All contents included in this manual are protected by the terms of use and copyrights of motrona GmbH. Any reproduction,
modification, usage or publication in other electronic and printed media as well as in the internet requires prior written
authorization by motrona GmbH.
Uf251_01d_oi_e.doc / Aug-16
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Table of Contents
1.
Safety Instructions and Responsibility ........................................................ 4
1.1
1.2
1.3
1.4
General Safety Instructions ............................................................................................. 4
Use according to the intended purpose........................................................................... 4
Installation ....................................................................................................................... 5
Cleaning, Maintenance and Service Notes ..................................................................... 5
2.
Introduction ................................................................................................ 6
3.
Terminal Assignment and Connections ....................................................... 7
3.1.
3.2.
3.3.
3.4.
Frequency Outputs ........................................................................................................... 7
Control Inputs ................................................................................................................... 8
Analog Inputs ................................................................................................................... 8
Serial Interface ................................................................................................................ 9
4.
DIL Switch Settings .................................................................................. 10
5.
Setup Procedure ....................................................................................... 11
5.1.
5.2.
5.3.
5.4.
5.5.
Conversion of voltage or current using a fixed frequency range .................................. 11
Using a potentiometer for the input voltage and a fixed frequency range .................. 11
Conversion of a voltage or current using the freely adjustable frequency range ......... 11
Motorized Potentiometer Mode .................................................................................... 13
Repeat Mode ................................................................................................................. 13
6.
Readout of Register Values via Serial Interface ........................................ 14
7.
PC Setup with Use of the Operator Software OS6.x ................................. 15
8.
Displays and Soft Keys ............................................................................. 16
9.
Parameter Settings ................................................................................... 17
10. Programmable Linearization ...................................................................... 21
11. Test Functions........................................................................................... 23
12. Dimensions ............................................................................................... 24
13. Specifications ........................................................................................... 25
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1. Safety Instructions and Responsibility
1.1 General Safety Instructions
This operation manual is a significant component of the unit and includes important rules and
hints about the installation, function and usage. Non-observance can result in damage and/or
impairment of the functions to the unit or the machine or even in injury to persons using the
equipment!
Please read the following instructions carefully before operating the device and observe all
safety and warning instructions! Keep the manual for later use.
A pertinent qualification of the respective staff is a fundamental requirement in order to use
these manual. The unit must be installed, connected and put into operation by a qualified
electrician.
Liability exclusion: The manufacturer is not liable for personal injury and/or damage to property
and for consequential damage, due to incorrect handling, installation and operation. Further
claims, due to errors in the operation manual as well as misinterpretations are excluded from
liability.
In addition the manufacturer reserve the right to modify the hardware, software or operation
manual at any time and without prior notice. Therefore, there might be minor differences
between the unit and the descriptions in operation manual.
The raiser respectively positioner is exclusively responsible for the safety of the system and
equipment where the unit will be integrated.
During installation or maintenance all general and also all country- and application-specific
safety rules and standards must be observed.
If the device is used in processes, where a failure or faulty operation could damage the system
or injure persons, appropriate precautions to avoid such consequences must be taken.
1.2 Use according to the intended purpose
The unit is intended exclusively for use in industrial machines, constructions and systems. Nonconforming usage does not correspond to the provisions and lies within the sole responsibility
of the user. The manufacturer is not liable for damages which has arisen through unsuitable
and improper use.
Please note that device may only be installed in proper form and used in a technically perfect
condition - in accordance to the technical specifications (see chapter 13). The device is not
suitable for operation in explosion-proof areas or areas which are excluded by the EN 61010-1
standard.
Uf251_01d_oi_e.doc / Aug-16
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1.3 Installation
The device is only allowed to be installed and operated within the permissible temperature
range. Please ensure an adequate ventilation and avoid all direct contact between the device
and hot or aggressive gases and liquids.
Before installation or maintenance, the unit must be disconnected from all voltage-sources.
Further it must be ensured that no danger can arise by touching the disconnected voltagesources.
Devices which are supplied by AC-voltages, must be connected exclusively by switches,
respectively circuit-breakers with the low voltage network. The switch or circuit-breaker must
be placed as near as possible to the device and further indicated as separator.
Incoming as well as outgoing wires and wires for extra low voltages (ELV) must be separated
from dangerous electrical cables (SELV circuits) by using a double resp. increased isolation.
All selected wires and isolations must be conform to the provided voltage- and temperatureranges. Further all country- and application-specific standards, which are relevant for structure,
form and quality of the wires, must be ensured. Indications about the permissible wire crosssections for wiring are described in the technical specifications (see chapter 13).
Before first start-up it must be ensured that all connections and wires are firmly seated and
secured in the screw terminals. All (inclusively unused) terminals must be fastened by turning
the relevant screws clockwise up to the stop.
Overvoltages at the connections must be limited to values in accordance to the overvoltage
category II.
For placement, wiring, environmental conditions as well as shielding and earthing/grounding of
the supply lines the general standards of industrial automation industry and the specific
shielding instructions of the manufacturer are valid. Please find all respective hints and rules on
www.motrona.com/download.html --> “[General EMC Rules for Wiring, Screening and
Earthing]”.
1.4 Cleaning, Maintenance and Service Notes
To clean the front of the unit please use only a slightly damp (not wet!), soft cloth. For the rear
no cleaning is necessary. For an unscheduled, individual cleaning of the rear the maintenance
staff or assembler is self-responsible.
During normal operation no maintenance is necessary. In case of unexpected problems, failures
or malfunctions the device must be shipped for back to the manufacturer for checking,
adjustment and reparation (if necessary). Unauthorized opening and repairing can have
negative effects or failures to the protection-measures of the unit.
Uf251_01d_oi_e.doc / Aug-16
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2. Introduction
UF 251 represents a small and low-cost, but highly performing converter for industrial
applications, where analog signals need to be converted into a frequency or a serial data
format. The unit has been designed as a compact module with 12 screw terminals and two 9position SUB-D connectors (female and male). The housing is suitable for standard DIN rail
mounting.
A voltage input signal of ±10 V can be directly applied to screw terminals 1 and 4 (AGND). The
input resistance is approximately 100 kOhm.
It is also possible to use a potentiometer to set input voltage by connecting the centre tap of
the potentiometer to screw terminal 3 and the end taps to screw terminals 2 and 4. The
resistance of the potentiometer should be about 1 kOhm.
For use of current input signals ±20 mA, connect the current loop to screw terminals 3 and 4
(AGND) and bridge screw terminal 3 to screw terminal 7. The input resistance is approximately
150 Ohm.
The output frequency range is programmable and extends from 0.01 Hz to 100 kHz (HTL output)
and 500 kHz (TTL differential respectively RS422 output). HTL and RS422 output signals can be
used independently. Additionally, the unit provides a programmable marker pulse. The output
frequency direction can either be set by control input “UP-DOWN” or is determined by the
polarity of the input signal.
In “Motorized Potentiometer” Function Mode the UF251 can output a programmable frequency
curve, under control of inputs “UP” and “DOWN”.
In “Repeat Mode” the unit can output a cyclic frequency curve, controlled by the inputs
“UP-DOWN” and “SET”
For applications with unstable input signals the unit provides a programmable digital filter to
smoothen the output signal (floating average filter).
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3. Terminal Assignment and Connections
Connect the power supply voltage to terminal 5 (+) and 6 (-). We recommend to tie the Minus
wire of the power supply to earth potential. Terminals 4 (AGND) and 6 (GND) are connected
internally. Depending on the power voltage level, the current consumption of the unit is
approximately 120 to 180 mA.
RS232/RS485
7
8
9
10
11
12
Analogue in +/- 20mA
UP-DOWN/UP
SET/DOWN
A (HTL)
B (HTL)
Z (HTL)
Frequency output
RS422
1
2
3
4
5
6
Analogue in +/- 10V
POT
M
AGND
+18...30VDC
GND
3.1. Frequency Outputs
The unit provides two frequency outputs, one HTL level (A, B, Z) and one RS422 (A, /A, B, /B, Z,
/Z). The marker pulse length is ¼ pulse period and is gated by A high and B high.
The HTL output, in High state, provides a no-load voltage of approximately the supply voltage
minus 4 volts. The output is short-circuit proof up to 24 V and has an internal resistance of
approximately 600 Ohm.
The maximum output frequency of the RS422 output is 500 kHz. The HTL output should however
only be used up to approx. 100 kHz, since higher output frequencies could cause poor pulse
edge quality.
The preset frequency ranges (selectable by DIL-switch) have an accuracy of 0.15% of full scale
value and a dead band of 6.25 mV.
Accuracy and dead band can be increased by user specific limitation of the frequency ranges.
The overall frequency resolution is about 14 bits.
B
A
1
A
2
3
6
N
GND
7
N
4
5
8
9
B
RS422 Frequency Output: D-SUB 9 male
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3.2. Control Inputs
The unit provides two digital HTL inputs for control of the output frequency. The function of
these inputs depends on the mode of operation. For properties and electrical specifications see
the diagram below.
Control Inputs: Properties and principle of circuit
V
Max. 30V
Terminals 8+9
HIGH > 12V
12V
Input
Signal PNP,
Active HIGH
Tmin.=
5msec
3V
Var.
7,5k
GND
LOW < 3V
t
3.3. Analog Inputs
+/- 10V
100k
+/- 20mA
+3.9 Volt reference
33k
GND
GND
GND
Voltage Input
150R
1k
GND
Current Input
GND
Potentiometer-Input
 Voltage input requires position 5 of the DIL switch to be ON. The input voltage swing
must not exceed the ±10 V range. The resolution is 1 mV and the overall accuracy is
0.1%.
 Current input requires position 5 of the DIL switch to be OFF. Terminals 3 and 7 must be
bridged externally. The resolution is 2µA and the overall accuracy is again 0.1%.
 For potentiometer input the DIL switch position 5 must also be in OFF position. With use
of a 1kOhm potentiometer, in the centre position of the tap an error of approx. 1%
comes up due to the load by the internal resistance. However, this error can easily be
eliminated with use of the linearization function. For potentiometer supply a highly
stable reference voltage of about 3.9 V is used.
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3.4. Serial Interface
The unit provides a RS232 interface and a RS485 interface. However, only one of both can be
used at a time. Serial communication allows to read out the conversion result and to set
parameters and variables by PC, according to need.
The serial interface configuration is selected by DIL switch position 1. Position 6 of the switch
selects the communication functions “PC-mode” or “printer-mode”
+5V
5
GND int.
9
4
T+
8
RS485
3
T-
Sub-D-9 (female on unit site)
RxD
7
2
R+
RS232
TxD
6
1
R-
GND
5
5
9
9
4
4
8
8
3
3
7
7
TxD
RxD
2
2
6
6
Please connect only pins 2, 3 and 5 !
1
1
PC
RS232:
UF 251
T+
120 Ohms
120 Ohms
TR+
120 Ohms
120 Ohms
R-
5
9
4
T+
8
7
RS485- Bus
3
T-
2
UF 251
6
R+
R-
1
( 4- wire )
T+
120 Ohms
120 Ohms
T-
5
9
4
8
3
2
1
Uf251_01d_oi_e.doc / Aug-16
UF 251
6
( 2- wire )
7
RS485- Bus
Page 9 / 25
4. DIL Switch Settings
The DIL switch located on the top site of the unit provides
customer-specific settings of desired operation modes.
The switch settings below show normal operating mode with
current input and freely adjustable frequency range. No default
values will be loaded, the serial link is set to RS232 format and
to printer transmission mode.
ON
DILswitch
OFF
12345678
Unit loads default settings with every power up cycle
No loading of default settings upon power-up
Normal ( No Repeat)
Repeat
Printer Mode
PC Mode
Current input or Potentiometer
Voltage input
Normal conversion mode
Motorized Potentiometer operation
*) 
100 kHz
10 kHz
1 kHz
Freely adjustable by register
RS 232
RS 485
 *) It is a "must" to apply this setting when you like to use free scaling of the unit by PC
Changes of switch settings will become active only after the next power-up cycle!
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5. Setup Procedure
All basic functions of the converter can easily be set up by the DIL switches, without use of a
PC. For programming of advanced functions by PC see chapter 7.
Self test: Upon power up, both front LED’s must be lit first, and the yellow status LED must
switch off after the self test has been concluded successfully (approx.1 sec.).
5.1. Conversion of voltage or current using a fixed frequency range
Settings: Set DIL-switch 2 to 5 according to chapter 4 and connect the input signal as described
under chapter 3.3. Depending on the selected frequency range, the unit will output a frequency
of 100 kHz, 10 kHz or 1 kHz with a full-scale input signal of 10 V or 20 mA.
5.2.
Using a potentiometer for the input voltage and a fixed
frequency range
Settings: Set the DIL-switch 2 to 5 according to chapter 4 and connect the potentiometer as
described under chapter 3.3. Depending on the selected frequency range, the unit will output a
frequency of 100 kHz, 10 kHz or 1 kHz with maximum setting of the potentiometer. Fine tuning
for maximum accuracy of the frequency must be performed by register setting via PC.
5.3.
Conversion of a voltage or current using the freely adjustable
frequency range
Settings: Set the DIL-switch 2 to 5 according to chapter 4 and connect the input signal as
described in chapter 3.3.
The output frequency range is set via PC. Use registers “Low Voltage”, “High Voltage”, “Low
Frequency” and “High Frequency” to define the frequency scaling.
The frequency set to register “Low Frequency” will be generated with an input signal as set to
register “Low voltage”. The frequency set to register “High Frequency” will be generated with
an input signal as set to register “High Voltage”.
The value of “High Frequency” does also affect the accuracy of the output frequency. Basically
there are two accuracy ranges which can be selected by register “High Resolution”:
 High resolution (Parameter “High Resolution” = 1)
provides an accuracy of 0.1% at 250 kHz and a lowest possible frequency of 250 Hz
 Standard resolution (Parameter “High Resolution” = 0)
provides an accuracy of 0.1% at 67 kHz, and a lowest possible frequency of 62.5 Hz
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With the standard resolution mode there is an auxiliary output frequency divider available
(programmable by register “Output Divider”).
By well-aimed selection of the settings of “High Frequency” and “Output Divider” it is possible
to optimize the overall accuracy and the dead band around zero. For instance, to improve
accuracy, we can decrease “High Frequency” and “Output Divider” but concurrently this entails
an enlargement of the dead band. For better understanding of this coherence the following
example shows two possibilities of settings:
Example: You like to get an output frequency of 0 Hz with 5 V input voltage and 20 kHz output
frequency with 9 V input voltage.
Option (a):
Low Voltage
High Voltage
Low Frequency
High Frequency
High Resolution
Output Divider
:
:
:
:
:
:
5.000
9.000
0
20.000
0 (standard resolution)
1 (no division)
This setting results in an accuracy of [20 kHz : 67kHz x 0.1%], therefore approx. 0.03%. But our
lowest possible frequency is 62.5 Hz. This means we will need to accept a dead band window
around zero which is
10V x
62,5 Hz
20.000 Hz
= 0.031V
The unit will generate zero output frequency in a range of 5 Volts +/- 31 mV
Option (b):
Low Voltage
High Voltage
Low Frequency
High Frequency
High Resolution
Output Divider
:
:
:
:
:
:
5.000
9.000
0
60.000 ( = 3 x 20.000 )
0 (standard resolution)
3 (60 kHz : 3 = 20 kHz as required)
This setting results in an overall accuracy of 0.1%. However the lowest possible frequency is
now 1/3 of 62.5 Hz, this means 20.8 Hz. Therefore, our dead band around zero will only be
10V x
20,8 Hz
20.000 Hz
= 0.010V
We will have zero output frequency in a range of 5 V ±10 mV.
Uf251_01d_oi_e.doc / Aug-16
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For fine tuning of the input signal scaling it is possible to use the monitor function of the PC
software. If you like to do this, set register “Average” to 6 to activate average mode and
smooth the input signal. The monitor now will show very stable values of the analog input
(register code :5), which you can use to set your “High Voltage” and “Low Voltage” registers.
The voltage measurement with the monitor function provides an accuracy of 0.1%.
5.4. Motorized Potentiometer Mode
With the Motorized Potentiometer Mode you can program a voltage curve as desired to be
converted to output frequency. The output frequency can be ramped up and down by control
inputs “UP” and “DOWN” respectively. If no input is activated, the output frequency remains at
its actual value. The output frequency is limited by the minimum and maximum frequency
settings, regardless of whether the inputs are still active or not.
Settings: Set DIL-switch 4 and 7 according to chapter 4. It is not necessary to apply any voltage
or current input signal to the unit, because the voltage curve is generated internally.
Set register “Low Voltage” to 0 and register “High Voltage” to 10000 (the range of the
internally generated voltage will be 0 to 10 V).
The output frequency range can be set by registers “Low Frequency” and “High Frequency”.
The output frequency curve can be defined by linearization function:
If you desire a linear output frequency curve, set registers P1(x) and P1(y) to 0 and registers
P2(x) and P2(y) to 100%. Non-linear characteristic can be programmed by using the linearization
function, as described in chapter 10. To activate linearization function set register
“Linearization Mode” to unequal 0.
A change of the output frequency direction (phase A/B) can also be obtained by using the
linearization function. The ramp-up time (input “UP” activated) is set to register “Time Up” and
the ramp-down time (input “DOWN” activated) is set to register “Time Down”.
5.5. Repeat Mode
The repeat mode differs from normal motorized potentiometer mode only in one item:
The frequency curve is generated cyclically.
Control input “UP-DOWN” changes the direction of the frequency sequence and control input
“SET” stops the output cycle and freezes the actual frequency.
Settings: Set DIL-switch 4 and 7 according to chapter 4. It is not necessary to apply any voltage
or current input signal to the unit, as the voltage curve will be generated internally.
All parameter setting is equal to normal motorized potentiometer mode (as described above)
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6. Readout of Register Values via Serial Interface
Independent on your settings you can read out the actual voltage and the actual frequency at
any time via serial link. For setting of serial communication parameters etc., you must however
apply PC set-up anyway, like shown later.
UF251 uses the DRIVECOM communication protocol according to the ISO 1745 standard.
Details about the protocol can be found in our file named SERPRO, available at any time on
request.
You are also free to download these instructions from our homepage www.motrona.com
The following register codes are available for readout:
Register-Code:
C1
C2
:
3
:
5
Description:
Actual frequency, format xxxxxx.xx Hz
Actual input value, scaling 0 to 10000 mV
(which also corresponds to input current 0 to 20 mA)
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7. PC Setup with Use of the Operator
Software OS6.x
You can apply the full set of functions of the UF251 converter when using a PC and our operator
software OS6.x for setup of the unit. The software is available for free download under
www.motrona.com
 Connect your PC to the converter using a serial RS232 cable like shown in section 3.4 of
this manual. Make sure the cable only uses pins 2, 3 and 5. Pins 2 and 3 must be
crossed.
 Run the OS6.x software and you will see the screen shown below.
 In case your text and color fields should remain empty and the headline says „OFFLINE“,
you must verify the setting of DIL switch positions 1 and 6 and check your serial
settings. Select „Comms“ from the menu bar to check for serial settings.
Ex factory, all motrona units use the following serial default settings:
RS232, Unit No. 11, Baud Rate 9600, 1 start bit, 7 data bit, parity even, 1 stop bit
 If the serial settings of your unit should be unknown, you can run the „Scan“ function
from the „Tools“ menu to find out.

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8. Displays and Soft Keys
The edit window for all unit parameters can be found on left hand side of the screen.
The “INPUTS” field shows the soft keys to switch the control commands on or off. Display
boxes in the RS column indicate when the corresponding command is set to ON by PC. Display
boxes in the PI/O column indicate that the corresponding command is activated by external
hardware.
The boxes in the “OUTPUTS” field provide information about the state of the unit.
The color bar graph displays the actual and undivided output frequency in a range of ±100% of
full scale.
The soft keys in the “CONTROL” field are available for readout, transmission and storage of
parameters.
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9. Parameter Settings
Parameter
In-Out Value Setting
Low Voltage:
High Voltage:
Low Frequency:
High Frequency :
General Setting
Z-Impulse:
Description
These registers select the input and output signal range and define the
voltage-frequency curve of the converter. With an input voltage of “Low
Voltage” the frequency value entered to “Low Frequency” will be
generated and with an input voltage of “High Voltage” the frequency
value “High Frequency” will be generated.
This register selects the generated marker pulse distance. E. g. a setting
of 2000 will generate a marker pulse every 2000 pulses of the output
frequency. The minimum setting of this register is 10.
The marker pulse generation is not affected by the setting of register
“Output Divider”, i.e. the marker pulse distance is calculated by the
originally generated frequency with no respect to the division.
The marker pulse is gated by channel A high and channel B high. Thus
the marker pulse length is ¼ of one pulse period.
The marker pulse does not recognize any direction and will always
appear after the number of preset pulses, even when the A/B direction
should have changed meanwhile!
Set Value:
With normal operating mode, when control input „SET“ is activated
(terminal 9), a fixed frequency value will be generated as defined by the
voltage entered to register “Set Value”. This means, when control input
“SET” is active, the unit operates as if a fixed input voltage of “Set
Value” would be applied to the input.
With other operating modes this register has no function.
Average:
This register activates and adjusts the floating average filter to smooth
unstable input signals. When register “Average” is set to 0, the floating
average filter is switched off. The higher the register setting, the
stronger the input signal is smoothed (see table below).
Setting of register “Average”:
Number of averaging cycles:
0
---
1
2
2
4
3
8
4
16
5
32
6
64
The floating average filter affects the response time of the frequency output.
With a setting of 6, a step change of the input signal will result in a step
response of the frequency output of approx. 120 ms delay. Decrementing
„Average” by 1 approximately halves the response time.
The floating average filter is only active in normal operation mode.
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Parameter
Linearization
Mode:
Description
Sets the mode of linearization.
0: Linearization off, registers P1 to P16 do not affect the output
characteristics.
1: Linearization in a range of 0 – 100%
2: Linearization over full range –100% to +100%
For full details about Linearization please refer to chapter 10.
Direction
Frequency:
This register controls the direction of the output frequency.
0:
the direction of the frequency output signal depends on the polarity
of the input signal or on the linearization curve settings respectively.
1:
the frequency is output in one direction only with no respect to the
polarity of the input signal.
2:
equals setting 0 but additionally provides inversion of the output
frequency direction by control input “UP-DOWN”
3:
equals setting 1 but additionally provides inversion of the output
frequency direction by control input “UP-DOWN”
In operating modes Motorized Potentiometer and Repeat Mode the function
of this register is disabled.
Special Setting
Time Up:
Time Down:
For use with operating modes Motorized Potentiometer and Repeat Mode
only.
Sets the ramp time (up or down) of the frequency output from
0.001 to 999.999 seconds for a transition over the full range
Divider Setting
High Resolution:
0:
Standard resolution
Accuracy 0.1% at 67 kHz, minimum output frequency 62.5 Hz.
Register “Output Divider” divides the output frequency. By this
means you can achieve minimum frequencies lower than 62.5 Hz.
1:
High Resolution
Accuracy 0.1% at 250 kHz, minimum output frequency 250 Hz.
The output divider is disabled.
You should set register “High Resolution” to 1 only when you want to
generate very high output frequencies (e.g. > 100kHz) at high accuracy.
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Parameter
Output Divider:
Description
This register is only active with standard resolution (Parameter „High
Resolution“ = 0).
The frequency generated by the converter is divided by the value set to
this register, before it appears at the output.
Setting 1 results in no division (Frequency output 1:1).
Setting 2 results in output frequency divided by 2 etc.
The maximum possible setting is 10.000 for a 1:10 000 division
It is a “must” to use the divider whenever you like to generate
frequencies lower than 62.5 Hz.
Linearization Setting
P1(x), P1(y), …,
See description of the linearization function in chapter 10.
P16(x), P16(y):
Protocol Setting
The following register settings control the automatic cyclic transmission
of internal register values by serial interface to peripherals like printers
or displays. Please note: For cyclic transmission of a register value DILswitch 6 must be set to “Printer Mode” (see chapter 4).
Serial Protocol:
Selects the serial protocol for the cyclic transmission.
0:
the string starts with the serial address of the unit (Unit
Number), followed by a space and the value of the register to be
read out. The string ends with a “Line Feed” character and a
“Carriage Return” character.
1:
the unit number is omitted, the string starts with the register
value, to allow faster transmission at shorter transmission cycles
Unit No.
1
1
Serial Protocol = 0 :
Serial Protocol = 1 :
+/+/-
X
X
X
X
X
X
X
X
X
X
X
X
LF
LF
CR
CR
Serial Timer:
Determines the cycle time in seconds for the cyclic transmission.
With a setting of e.g. 0.100 the selected register value will be transmitted
every 100 ms. The accuracy of the timer is ±500 µsec.
Register Code:
Selects the register to be transmitted cyclically. Setting of 00 selects
register code :0, setting of 01 selects register code :1 etc.
Uf251_01d_oi_e.doc / Aug-16
Page 19 / 25
Parameter
RS232/RS485 Setting
Unit Number:
Description
With RS485 applications it is necessary to attach a specific address
to each unit, since up to 32 units can be connected to the same bus.
You can choose any address number between 11 and 99.
Factory setting: 11
Unit addresses must not contain a “0“ because these numbers are reserved
for collective addressing.
Serial Baud Rate:
Serial Format:
Uf251_01d_oi_e.doc / Aug-16
Setting
0*
1
2
3
4
5
6
Setting
0*
1
2
3
4
5
6
7
8
9
* = Factory setting
Data bits
Parity
7
even
7
even
7
odd
7
odd
7
none
7
none
8
even
8
odd
8
none
8
none
* = Factory setting
Baud
9600
4800
2400
1200
600
19 200
38 400
Stop bits
1
2
1
2
1
2
1
1
1
2
Page 20 / 25
10. Programmable Linearization
This programmable feature allows the user to convert a linear input signal to a non-linear
output signal. There are 16 programmable x/y interpolation points available, which can be set
in any desired distance over the full conversion range. Between two points, the unit uses linear
interpolation. Therefore it is advisable to use more coordinates in a range with strong curves
and only a few coordinates where the curvature is less.
To specify your desired linearization curve, you must first set „Linearization Mode“
to either 1 or 2.
Use registers P1(x) to P16(x) to specify the coordinates on the x-axis.
These settings must be in % of full scale.
Now enter the attached values to registers P1(y) to P16(y). These are the values that the output
will generate instead of the x-values, i.e. P2(y) will substitute P2(x) etc.

x-registers must use continuously increasing settings, i.e. P1(x) must have
the lowest and P16(x) must have the highest setting.

All entries use a percent format of xx.xxx% full scale. Setting 0.000%
means zero output and setting 100.000% means full scale output.

With Linearization Mode set to 1, it is a must to set P1(x) to 0% and P16(x)
to 100%. Linearization then is defined in the positive range only and the
negative range will be a mirror image of the positive range with reference
to zero.

With Linearization Mode set to 2, it is a must to set P1(x) to –100% and
P16(x) to +100%. This enables the user to set curves which are not
symmetric to the zero position.
P1(x)= -100%
P1(y)= 95%
y
*) Output mode = 0
P16(x)=100%
P16(y)= 80%
x
P1(x)= 0%
P1(y)=10%
*)
Linearisation Mode = 1
Uf251_01d_oi_e.doc / Aug-16
y
P8(x)= 0%
P8(y)= 80%
x
P16(x)=+100%
P16(y)= -60%
Linearisation Mode = 2
Page 21 / 25
You can visualize your curve on the PC screen or by means of an external oscilloscope. When
you like to do this, please select TOOLS / TEST / „Linear Function Test“. The unit will now
simulate a repeating course over the full range and generate the output accordingly.
Uf251_01d_oi_e.doc / Aug-16
Page 22 / 25
11. Test Functions
When you select TEST from the TOOLS menu, you are able to verify the following data, by
clicking to the corresponding field:




Actual frequency
DIL switch settings
Internal supply voltages
Frequency output state
Uf251_01d_oi_e.doc / Aug-16
Page 23 / 25
12. Dimensions
79 mm (3.110’’)
40 mm (1.575’’)
91mm (3.583’’)
74 mm (2.913’’)
Front view
Uf251_01d_oi_e.doc / Aug-16
Side view
Top view
Page 24 / 25
13. Specifications
Power supply:
Analog input:
Control inputs:
Frequency outputs:
Serial Interface:
Housing:
Ambient temperature:
Failure rate:
Conformity & standards:
Uf251_01d_oi_e.doc / Aug-16
Input voltage:
Protection circuit:
Ripple:
Consumption:
Connections:
Operation (switchable):
Voltage:
Current:
ext. Potentiometer:
Reference voltage (Poti):
Internal resistance:
Resolution:
Accuracy:
Connections:
Number of inputs:
Input logic:
Signal levels:
Internal resistance:
Functions:
Pulse length:
Connections:
Number of outputs:
Formats:
Channels:
Frequency:
HTL signal levels:
Internal resistance (HTL):
Output current (TTL/RS422):
Resolution:
Accuracy:
Reaction time:
Dead band:
Connections:
Format:
Baud rate (selectable):
Operation modes:
Communication:
Connections:
Material:
Mounting:
Dimensions (w x h x d):
Protection class:
Weight:
Operation:
Storage:
MTBF in years:
EMC 2004/108/EC:
Guideline 2011/65/EU:
18 … 30 VDC
reverse polarity protection
≤ 10 % at 24 VDC
approx. 120 mA … 170 mA
screw terminal, 1.5 mm² / AWG 16
Voltage, current or potentiometer
- 10 V … + 10 V
0/4 … 20 mA
1 kOhm (operation as voltage input)
3.9 V (operation as voltage input)
Ri ≈ 100 kOhm (V) resp. 150 Ohm (mA)
1mV resp. 2 µA
0.1 %
screw terminal, 1.5 mm² / AWG 16
2
HTL, PNP, active high
LOW: 0 … 3 V, HIGH: 12 … 30 V
Ri ≈ 7.5 kOhm
up-down/up/set/down (depends on selected mode)
min. 5 ms
screw terminal, 1.5 mm² / AWG 16
2
TTL/RS422 and HTL
A, B, Z (HTL) resp. A, /A, B, /B, Z, /Z (TTL/RS422)
100 kHz (HTL) resp. 500 kHz (TTL/RS422)
power supply voltage minus 4 V
Ri ≈ 600 Ohm
max. 20 mA
14 Bit
0.1 %
approx. 3 ms
6.25 mV
SUB-D connector (male), 9-pin
RS232 or RS485 (selectable)
600, 1200, 2400, 4800, 9600 (standard), 19200, 38400 Baud
PC or printer
Drivecom-Protocol according to ISO 1745
SUB-D connector (female), 9-pin
plastic
35 mm top hat rail (according to EN 60715)
40 x 79 x 91 mm / 1.5748 x 3.1102 x 3.5827 inch
IP20
approx. 200 g
0 °C … +45 °C / +32 … +113 °F (not condensing)
-25 °C … +70 °C / -13 … +158 °F (not condensing)
56.5 a (long-term usage at 60 °C / 140 °F )
EN 61000-6-2, EN 61000-6-3, EN 61000-6-4
RoHS-conform
Page 25 / 25
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