Status WRX900 Series User manual

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Contents
1 Introduction ..................................................................................4
1.1 Safety information ...................................................................4
1.2 Description.............................................................................5
1.3 Block diagram .........................................................................5
2 Identifying the instrument ersion......................................................6
2.1 Type designation .....................................................................6
2.2 Accessories Included.................................................................6
2.3 Accessories ............................................................................6
3 Basics ..........................................................................................7
3.1 Radio technology .....................................................................7
3.2 General information about radio transmission ................................8
3.3 Reception characteristic of the lambda/4 antenna...........................9
3.4 Interferences ........................................................................ 10
3.5 Function o er iew ................................................................. 13
4 Installation.................................................................................. 17
4.1 Installation site and climatic conditions ...................................... 17
4.1.1 Recei er ....................................................................... 17
4.1.2 Antenna........................................................................ 17
4.2 Dimensions........................................................................... 18
4.2.1 Recei er WRX900............................................................ 18
4.2.2 Lambda/4 antenna .......................................................... 18
4.2.3 Antenna wall holder for lambda/4 antenna ........................... 18
4.3 Recei er installation........................................................... 19
4.4 Fitting the antenna ................................................................ 20
4.4.1 Antenna installation directly on the recei er......................... 20
4.4.2 Antenna installation on the antenna wall holder .................... 20
5 Electrical connection..................................................................... 20
5.1 Installation notes ................................................................... 20
5.2 Connection diagram................................................................ 21
6 Display and key functions ............................................................... 23
6.1 Normal display (measured alues and signal quality) ...................... 23
6.2 Commissioning/start-up le el (In) (allocating the probe ID to a channel)
............................................................................................... 25
6.3 Parameter le el (PA) (Parameter configuration)............................ 27
6.4 Light diodes (independent of le el)............................................ 29
7 Recei er operation ....................................................................... 30
7.1 Normal display (ND)................................................................ 31
7.2 Channels and their Display measured alues ................................ 31
7.3 Display signal quality of the probes recei ed................................ 32
7.4 Changing to other Changing le els............................................. 33
7.5 Code interrogation ................................................................. 34
8 Configuration of the recei er .......................................................... 37

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8.1 Commissioning/start-up le el (In) .............................................. 37
8.1.1 Selection of a transmitter ID from the link list and assignment to a
channel ................................................................................ 38
8.1.2 Manual assignment of a transmitter ID to a channel................. 40
8.1.3 Assignment of a transmitter ID to a channel ia interface......... 41
8.1.4 Pre-configuration of all transmitter ID's using the setup program 41
8.1.5 Configuration of customized transmitter ID's on the transmitter
side ..................................................................................... 42
8.2 Parameter le el (PA) .............................................................. 43
8.2.1 Editing parameters .......................................................... 45
8.2.2 General parameters De ice information ................................... 46
8.2.3 Channel specific parameters.............................................. 50
9 Term definition ............................................................................ 52
9.1 General parameters................................................................ 52
9.1.1 de ice information .......................................................... 52
9.1.2 De ice data ................................................................... 52
9.1.3 RS485 interface .............................................................. 54
9.1.4 Analog outputs 1 to 4....................................................... 55
9.1.5 Relay outputs 1 to 2 ........................................................ 57
9.1.6 Modbus remote control alues FLOAT 1 to 4.......................... 58
9.2 Channel specific parameters .................................................... 58
10 Display and reset fly back ............................................................. 64
11 Setup program............................................................................ 67
11.1 General information about the setup program ............................ 67
11.2 Hardware and software prerequisites ....................................... 68
11.3 Connect PC and recei er to each other ..................................... 69
11.4 Configuration of the recei er .................................................. 70
11.4.1 Establishing the communication........................................ 70
11.4.2 Reading out the current recei er parameters ...................... 71
11.4.3 Editing recei er parameters............................................. 72
11.4.4 Transmit new parameters to the recei er ........................... 72
11.5 Customer-specific linearization ............................................... 72
11.6 OnlineChart ........................................................................ 75
12 Detect and remedy faults/errors..................................................... 78
13 Supplement ............................................................................... 81
13.1 Technical data..................................................................... 81

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1 Introduction
1.1 Safety information
General information
This manual contains information that must be observed in the interest of your
own safety and to avoid damage to assets. This information is supported by
symbols which are used in this manual as follows.
Please read this manual before commissioning the device. eep the manual in a
place accessible to all users at all times.
If difficulties occur during commissioning, please refrain from carrying out any
manipulations that could jeopardize your warranty rights.
Warning signs
DANGER!
This symbol indicates that Injury or death caused
by electrical shock can/may occur, if the
respective protective measures are not carried out.
CAUTION!
This symbol in combination with the signal word
indicates that damage to assets or data loss will
occur if suitable precautions are not taken.
Note signs
TIP!
This symbol refers to important information about
the product or its handling or additional use.
REFERENCE!
This symbol refers to Further information in other
sections, chapters or manuals.

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WRX
900
1 x RS485
1 x Setup with USB Config
Interface
AC (110 to 240) V +10 / -15 %
(48 to 63) Hz
or
AC / DC (20 to 30) V, (48 to 63) Hz
Voltage Supply
Reciever
Transmission
frequency
868.4 MHz
4 Keys for operation and
configuration
Keyboard
2- Line LCD display for the
measured value display and
configuration as well as 2
LED's as status displays
Interface
4 x (0(4) to 20) mA or (0 to 10) V
or
2 x (0(4) to 20) mA or (0 to 10) V
2 x relay max. 3 A, AC 230V
Outputs
1.2 Description
The WRX900 in combination with the WTX700 is suitable for mobile or stationary
temperature measurements. The application of radio technology in the ISM band
(industrial, scientific and medical band) 868.4 MHz results in a notable reduction
of installation work and costs. Cable connections are not required, the radio-
based sensor technology also functions in a rough industrial environment. The
supplied Lambda/4 antenna with an impedance of 50 Ohm can be screwed on
directly or fitted externally. When using the antenna wall holder with the 10
meter long antenna cable, the maximum open air range is 300 m. The received
measured values are converted in the receiver, displayed and are available as
linear current or voltage signals (0(4) to 20) mA, (0 to 10) V and via the digital
RS485 interface. For the WRX900/22 two relay outputs are provided to signal
different alarms. All receiver outputs are electrically isolated. Linkage to higher-
ranking systems, e.g. system visualization MSCADA software, is possible via the
digital interface with Modbus protocol.
Operation and configuration is possible via the keyboard in connection with a 2-
line LCD or, more comfortable, using a setup program. Thus, parameters, such as
filter constants, offset, alarms and fly back (minimum and maximum value
memory) can be separately set for each channel. For this purpose, a plug is
provided on the front for a PC interface with a USB/TTL converter for the
connection between receiver and PC.
The receiver is intended for fitting on a top hat rail 35 mm x 7.5 mm according to
DIN EN 60715. The screw-type terminals for the electric connection are arranged
at different levels. Ensure that the cable cross section does not exceed 2.5 mm2.
1.3 Block diagram
Figure 1: Receiver block diagram

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2 Identifying the instrument ersion
2.1 Type designation
WRX900/04/S1 Receiver with 4 x Analog O/P
230 V AC
WRX900/04/S2 Receiver with 4 x Analog O/P
30 V DC
WRX900/22/S1 Receiver with 2 x Analog O/P
2 x Relay O/P
230 V AC
WRX900/22/S2 Receiver with 2 x Analog O/P
2 x Relay O/P
30 V DC
2.2 Accessories Included
Operating Manual
Lambda/4 antenna, impedance 50 ohm, 868.4 MHz
2.3 Accessories
The following articles must be ordered separately:
WRX900 / Antenna Extension it
WLESS/CNFG/ IT
Software is available as a free download from www.status.co.uk. This is also
supplied on a CD as part of the USB configurator kit

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3 Basics
3.1 Radio technology
The characteristic framework conditions for each transmission system include the
available band width in the electro-magnetic spectrum and the maximum
permissible transmission capacity. These parameters define the channel capacity.
The main selection criteria for the frequency range to be used include the
requirement of a long range, interference resistance as well as the possibility to
be able to apply a customized transmission protocol in public spectrum band. The
focus when selecting the possible communication technologies is placed on
miniaturizing the transmitting and receiving circuit as well as the power
consumption, on enhancing the transmission safety and the transmission stability
as well as on saving costs of the technology involved. The use of a wireless
connection generates above all lower costs, higher flexibility and mobility as well
as simpler handling.
Taking the currently valid legislation into account and by complying with the
available norms and industrial standards, we have opted in favor of a wireless
solution for the application of the WRX900 system without a generally specified
protocol in the ISM band on the following frequencies: 868.4MHz (Europe)
Regarding the ISM band, in certain areas there are stringent regulations in place
concerning duty cycle, channel distribution as well as transmission capacity. The
various subdivisions within this frequency band are shown on the following figure
1.
Figure 1: Subdivision of the 868 MHz frequency band
The ERP power value (ERP: equivalent radiated power) value represents the
permitted transmission capacity related to a Lambda/2 dipole gain. When
utilizing the duty cycle, during the transmission pulse at a very small pulse width,

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5 ms
1000 ms = 0.005 = 0.5 %
t
S
t
G=
the transmission capacity is only generated for a very short period.
Duty cycle in percent identifies the duration of the transmission of a probe
related to 1 hour. The entire transmission time can be distributed to several
transmission intervals. As such, duty cycle given in percent represents the ratio
between transmission time and overall time.
The duty cycle is also termed pulse-to-pause ratio.
If, for instance, the transmission duration of a signal is 5 ms followed by a 995 ms
transmission pause, the duty cycle results from the following computation:
3.2 General information about radio transmission
Radio signals are electro-magnetic waves becoming weaker on their way from the
probe to the receiver (this is referred to as path attenuation). The field strength
decreases inversely in proportion to the square distance between probe and
receiver.
In addition to this natural limitation of the operating distance, a reduced
operating distance can also have further causes:
•Reinforced concrete walls, metal objects and surfaces, heat insulation
or heat protection glass with a vapor deposited metal layer reflect and
absorb electro-magnetic waves and, for this reason, a so-called radio
shadow is generated.
•Antenna is installed in too low a position - install the antenna as high
above floor as possible and ensure visibility between probe and
receiver.
The following are some reference values concerning the transmittance of radio
signals:
Material Transmittance
Wood, cement, uncoated glass (90 to 100) %
Walls/brickwork, chipboards/fiber boards (65 to 95) %
Reinforced concrete (10 to 90) %
Metal, aluminum lamination (0 to 10) %

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The maximum range between probe and receiver is 300 m in the open air when
using the antenna wall holder for the receiver. Ensure visibility between probe
and receiver to achieve optimum reception.
When installing the receiver into a switch cabinet, behind concrete walls or
ceilings, always use the wall holder and antenna cable with the receiver.
3.3 Reception characteristic of the lambda/4 antenna
From the spatial directional response pattern of the lambda/4 antenna you can
derive that optimum reception can only be achieved when the antenna is
vertically aligned. From the vertical rod, the reception is nearly identical in all
directions. The range to the top and bottom, however, is strongly limited. Fitting
the antenna wall holder including the antenna in the vertical direction upwards or
downwards is possible, horizontal installation is not recommended.
TIP!
To ensure that the reception antennas do not
influence each other, adhere to a minimum
distance of 500 mm for an optimum reception.

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3.4 Interferences
Collisions when using an excessive number of transmitters
When using a large number of probes, do not select a transmission interval which
is too low, otherwise the transmission frequency will be unnecessarily obstructed.
A too low transmission interval means a very high data volume on the selected
frequency which can lead to collisions with other probes. Telegrams can be
destroyed during radio transmission caused by collisions.
Figure 4: Telegrams of several probes can collide.
Figure 5: Collisions depending on the number of probes at a transmission interval
of 1 s
P
20.0
c 0 1° C
ID Measuring
Value
PROBE RECEIVERRADIO TELEGRAM
ID Measuring
Value
ID Measuring
Value
ID Measuring
Value
ID Measuring
Value
Fault increase
16 18 20 22 24 26 28 30
Number of probes

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As you can see in figure 5 the error curve jumps up at the number of 24 probes.
For this reason, we recommend to use a maximum of 16 probes for the smallest
transmission interval of 1 s.
For the factory setting 10 s, a considerably larger number of probes is possible.
Estimation of the maximum number of transmitters
If more than the recommended 16 probes are to be used at a transmission interval
of 1 s, select a higher transmission interval to prevent an increased error quota.
Example:
16 probes at a transmission interval of 1 s = 32 probes at a transmission interval of
2 s
When the number of probes is to be increased additionally, the following
calculation results in the next example:
Example:
16 probes at a transmission interval of 1 s = 48 probes at a transmission interval of
3 s (theoretical)
At a transmission interval of ≥3 s, however, the telegram is transmitted twice. For
this reason, the number of probes to be used is halved.
16 probes at a transmission interval of 1 s = 24 probes at a transmission interval of
3 s (effective)
The identical behavior occurs from a transmission interval of ≥60 s. From this
transmission interval, the telegram is transmitted three times.
External transmitters
External probes can transmit on the same frequency. If, for example, the probe
and an external probe transmit their radio telegrams at the same time, the
telegrams are destroyed. Due to the fact, that the probes are not able to check
their own active transmission, no error is detected.
Electrical de ices
In rough industrial environment, radio telegrams can be destroyed, for example,
by frequency converters, electrical welding equipment or poorly shielded PCs,
audio/video devices, electronic transformers, electronic ballasts, etc.
Error map-out
The radio transmission timeout parameter on the receiver can be used to map out
lost telegrams (either by external influence or collisions caused by a large number
of probes) and no error message appears. The value received last is retained over
2 to 20 transmission intervals and the alarm radio transmission timeout is only
then activated (display "----").

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TIP!
In the event of collisions caused by an excessive number of
probes, observe and, if necessary, correct the factors "Number
of probes", "transmission interval" and on the receiver the
"Radio transmission timeout" factor.

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3.5 Function o er iew
Figure 6: Function review of the receiver

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1 Wireless transmitter
2 eypad
7 Automatic toggling of
the interface
3 LCD 8 Analog outputs
4 Light diodes 9 Relay outputs
5 Setup interface 10 RS485 interface
6 Actual value calculation of
the analog channels
11 Voltage supply
1 Wireless transmitter
The receiver is constantly active to receive the radio telegrams of the
active transmitters.
It checks every radio telegram received for its completeness.
If the radio telegram is valid, it is transferred to the processor for further
processing, in the same manner as the demodulated measured data.
2 Keypad
The function keys permit the operation and configuration of the receiver
without the set-up program.
Chapter 6 "Display and key functions"
3 LCD
In the standard display, the two rows of the LCD display show the current
values. On the commissioning and parameter level, they facilitate the
operation and configuration dialog.
Chapter 6 "Display and key functions"
4 Light diodes
The top bicolor light diode is green when voltage is applied, i.e. the unit
is operative. It flashes red in the event of an impending collective alarm.
The bottom yellow light diode flashes with every valid radio telegram
(data package) of the transmitter. The flash frequency increases with the
number of transmitters.
Chapter 6 "Display and key functions"

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5 Setup interface
The unit is equipped with a setup interface to allow configuration via the setup
program. For this purpose, the front features a connector for interface lines with
USB/TTL converter for the connection to a PC.
The setup interface is factory-set with the following values: Baud rate: 9600
bit/s, Data format: 8 data bits, 1 stop bit, no parity.
Minimum response time: 0 ms, Device address: 1.
Chapter 9.1.3 "RS485 interface"
Chapter 11 "Setup program"
6 Actual alue calculation of the analog channels
General information
The radio telegram detected by the receiver is transmitted to the controller for
actual value calculation. Here the individual measured values are processed.
Now the controller calculates the respective measured value from the transmitter
counting values. Linearization and temperature calculation automatically follow
the probe characteristic line. Each measured value can be checked for overrange
and underrange by means of two limit values. The minimum and maximum
measured values are saved.
Radio timeout function
The measured values of the probe are monitored via a radio timeout function.
Should an individual radio telegram be missing, the value received last will be
frozen. If no new radio telegram is received throughout the entire timeout
duration, the measured value is set to “no input value” with the top LED flashing
red.
7 Automatic changeo er of the interface
The device interrupts communication via the RS485, i.e. the set-up connector has
priority, when an interface cable is connected to the front set-up plug.
8 Analog outputs
A maximum of four analog outputs (current or voltage) are available. The
measured value is scaled to the set values for zero point and end value. Measured
values outside of these limits are detected as measuring overrange or underrange.
In this case, the value set here in the parameter level (value for measuring
overrange and underrange) is applied.
Chapter 5.2 "Connection diagram"
Chapter 8 "Configuration of the receiver"

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9 Relay outputs
Depending on the design, the device has a maximum of two relay outputs. The
status switching relay output 1 or 2 is determined by different control signals. The
desired control signal and the output signal (n/c or n/o contact) for each relay
can be set in the parameter level.
Chapter 5.2 "Connection diagram"
Chapter 8 "Configuration of the receiver"
10 RS485 interface
The unit is equipped with an RS485 interface with Modbus protocol to permit
connection to higher ranking systems. Baud rate, data format, minimum response
time and device address can be set via the keyboard or the setup program.
Chapter 5.2 "Connection diagram"
Chapter 8 "Configuration of the receiver"
11 Voltage supply
Voltage supply of the receiver is generated with a switch mode PSU from the
mains voltage AC (110 to 240) V.
For the electrical isolation of the output signals, further electrically isolated
voltages for the analog and relay outputs (Fig 6, 11.1 to 11.4), the supply of the
electronics (Fig 6, 11.5) and the interface (Fig 6, 11.6) are created from the
secondary voltage of the switch mode PSU.
Chapter 5.2 "Connection diagram"

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4 Installation
4.1 Installation site and climatic conditions
4.1.1 Recei er
Installation site and climatic conditions
The conditions at the mounting site must meet the requirements specified in the
technical data.
As far as possible, the installation site should be vibration-free to prevent the
screw connections from working loose.
The installation site should be free from aggressive media, e.g. acids and lye
(caustic soda), and, if possible, free from dust, flour and other suspended matter
to prevent blocking of the cooling slots.
At the installation site, ensure a minimum spacing of 100 mm above the device to
allow access to the unlocking slot required for dismantling with a screw driver.
eep a minimum spacing of 150 mm, if the antenna is directly fitted on the
receiver. Several receivers can be fitted next to each other without spacing.
(Attention: When several antennas are fitted directly, they can influence each
other).
At the installation site, the ambient temperature may range between (-20 and
+50) °C at a relative humidity of ≤85 % without condensation.
4.1.2 Antenna
The conditions at the installation site must meet the requirements specified in
the technical data.
Chapter 3.1 "Radio technology"
Chapter 3.2 "General information about radio transmission"
Chapter 4.4 "Fitting the antenna"

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4.2 Dimensions
4.2.1 Recei er WRX900
Figure 8: Receiver dimensions
4.2.2 Lambda/4 antenna
Figure 9: Lambda/4 antenna dimensions
4.2.3 Antenna wall holder for lambda/4 antenna
Figure 10: Dimensions of antenna wall holder for lambda/4 antenna
124.3 mm
22.5
mm
112.8 mm
109.4 mm
115.9 mm
93 mm
9 mm
125 mm
165 mm
4.5 mm
40 mm
173 mm
4.5
mm
20
mm
10
mm
10
mm
20
mm
40 mm

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4.3 Recei er installation
Fastening the recei er on the top hat rail
The receiver is intended for installation on a 35 mm top hat rail according to DIN
EN 60 715
TIP!
At the installation site, ensure a minimum spacing of 100 mm
above the device to allow access to the unlocking slot required
for dismantling with a screw driver. eep a minimum spacing of
150 mm, if the antenna is directly fitted on the receiver.
Several receivers can be fitted next to each other.

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4.4 Fitting the antenna
The range between the probe and the receiver is max. 300 m in open air. The
antenna used and its correct positioning is a determining factor for both operating
distance and reliability of the wireless connection. In practice, the most varied
influences affect the wireless transmit distance. For this reason, careful thought
should be given to the conditions prevailing at the installation site when selecting
the type of antenna installation.
Chapter 3.1 "Radio technology"
4.4.1 Antenna installation directly on the recei er
The Lambda/4 antenna supplied as standard can be directly screw-fitted
clockwise on the receiver.
4.4.2 Antenna installation on the antenna wall holder
Best results for data transmission can be achieved with the optional antenna wall
holder. The Lambda/4 antenna supplied as standard (length 85 mm) is simply
screw-fitted to this antenna wall holder. An antenna cable with pre-assembled
screw-type connections of
10 m length is available to connect the Lambda/4 antenna to the receiver.
5 Electrical connection
5.1 Installation notes
The choice of cable, the installation and the electrical connection of the device
must conform to the appropriate local regulations.
The electrical connection must only be carried out by qualified personnel.
The device is intended to be installed in switch cabinets, machines/plants or
systems. Ensure that the customer's fuse rating does not exceed 20 A. Isolate the
device on all poles prior to starting service or repair work.
The load circuit must be fused for the maximum relay current, in order to prevent
the output relay contacts becoming welded in the event of a short circuit
occurring at that point.
The electromagnetic compatibility conforms to the standards and regulations
cited in the technical data.