Sael RRF User manual

RF TRANSCEIVER
RRF
INSTALLATION AND OPERATING
MANUAL
SOFTWARE CODE: PRRF04
VERSION:Rev.0.0

CONTENTS
Pag. 2
SYMBOLS Page 3
WARNINGS Page 3
IDENTIFICATION DATA PLATE Page 3
PRODUCT DESCRIPTION Page 4
MAIN TECHNICAL FEATURES Page 6
INSTRUMENT INSTALLATION Page 7
POWER SUPPLY Page 8
RS232 SERIAL CONNECTION Page 8
RS422/RS485 SERIAL CONNECTION Page 9
USB CONNECTION Page 9
RF CHANNEL SELECTION Page 10
SELECTING THE NUMBER OF TRF IN THE NETWORK (MULTI) Page 10
INSTRUMENT CONFIGURATION Page 11
STATUS LED Page 12
FIRMWARE BOOT-LOADER Page 12
COMMUNICATION PROTOCOL IN MODE SINGLE AND MULTI Page 13
TROUBLESHOOTING Page 14
RRF installation and operating manual

The purpose of this guide is to inform the operator with text and illustrations of the installation methods and
of the correct use of the instrument.
 The equipment must be installed only by qualified personnel who must have read and understand this
manual. The “qualified personnel” is the personnel selected and authorized by the responsible of the
security to perform the installation.
 Power the instrument with voltage whose characteristics fall within the limits specified.
 Is your responsibility to ensure that the installation complies with the provisions.
 For each anomaly contact your nearest Service Centre. Any attempt to disassemble the instrument or
any modification of the instrument not expressly approved will void the warranty and will relieve the
Manufacturer from all liability.
WARNINGS
SYMBOLS
It is important to communicate these data in case of request
for information or indications concerning the instrument, also
communicate the program number and the version number
that are shown on the cover of the manual.
IDENTIFICATION DATA PLATE
RRF
!
RRF installation and operating manual Pag. 3
Here are the symbols used in the manual to draw the reader‟s attention:
Warning! Risk of electric shock.
Warning! This must be done by qualified personnel.
Pay particular attention to the following information.

PRODUCT DESCRIPTION
The transceiver RRF is an interface converter from Rs232-Rs422/485-USB to Radio Frequency 868 MHz,
with 3 modes of operation: DIRECT, SINGLE and MULTI, selectable via software through a special configu-
rator. The data format is fixed for all modes: 38400, N, 8, 1.
RRF installation and operating manual
TRF
INDICATOR
RRF RS232
RS485
Application 2 (SINGLE): acquisition of a single weight from a TRF through an indicator
UNIT B
RRF
RS232
RS485
Application 1 (DIRECT): wireless interface between two units
RRF
UNIT A USB
RS232
RS485
USB
Pag. 4
Used in pairs, simulates a serial connection using a wireless connection. (Application 1).
DIRECT MODE
MULTI MODE
This mode is used to capture the weight from multiple weight transmitters, model TRF (up to 15): in this case
the RRF transceiver communicates with the TRF and made available on the serial port (or USB) a string with
all the weight obtained. (Applications 4, 5 and 6).
The RF communication frequency is 868MHz, with power up to 10mW, with 7 operation channels selectable
from dip-switch for installations where are present multiple RF devices.
The power is at 5Vdc and can be supplied via the USB port when the transceiver is connected to a PC, oth-
erwise can be provided by the weight indicator we produce.
The RRF has programmable operating parameters, such as RF Power and the Communication Protocol.
The programming of the operating parameters is made through a PC application that allows you to easily
configure and just in few steps the system used (TRF and RRF).
It is used to interface with the weight transmitter for load cell, model TRF, in the manners explained below. In
particular it can be used to gain the weight from a single transmitter through the communication port Rs232,
Rs485 or USB. (Applications 2 e 3).
SINGLE MODE
TRF
RRF USB
PC
Application 3 (SINGLE): acquisition of a single weight from a TRF through a PC

PRODUCT DESCRIPTION
INDICATOR
RRF RS232
RS485
TRFTRFTRF
1 2 N
Application 4 (MULTI): acquisition of the weight from N TRF through an indicator
RRF
TRFTRFTRF
1 2 N
USB
PC
Application 5 (MULTI): acquisition of the weight from N TRF transmitters through a PC
RRF installation and operating manual Pag. 5
INSTRUMENT
1
RRF RS485
TRF
1
TRF
2
TRF
N
Application 6 (MULTI): acquisition of the weight from N TRF showed on more instruments (N)
INSTRUMENT
2
INSTRUMENT
N

MAIN TECHNICAL FEATURES
POWER REQUIREMENTS
Power supply
4.5 ¸ 15 Vdc ( 50 mA)
 Connection to PC: automatic power via USB port.
 Connection to instrument: normally used to power the load
cells.
Power supply connection Screw terminal pitch 5,08 mm cable gland
ENVIRONMENTAL
Operating temperature -10°C ¸ +50°C (max humidity 85% non condensing)
Storage temperature -20°C ¸ +60°C
PHYSICAL CHARACTERISTICS
Overall dimensions 126 mm x 79 mm x 41 mm (l x h x p) excluding antenna and
connector
Enclosure Cast aluminium
Protection degree IP65
Connection Screw terminals pitch 5,08 mm cable gland
SERIAL INTERFACE
Rs232 Communication parameters: 9600/19200/38400,N,8,1. Managed
signals: Txd, Rxd, Sgnd.
Rs422 / Rs485 Communication parameters: 38400,N,8,1.
USB Device, Full speed. Virtual Com Port driver for PC provided with the
application.
RF Frequency 866-868 MHz
RF channels 7 selectable via DIP SWITCH
Network addresses 15 selectable via DIP SWITCH
Signal coverage 50 mt.
CE Conformity to standards
EN 300 220 - EN 301 489 - EN60950 EN61000-6-2, EN61000-6-3, EN61010-1
RRF installation and operating manualPag. 6

 Do not install the instrument near power equipment
(motors, inverters, contactors, etc.) or near equipment that
do not comply with CE standards for electromagnetic com-
patibility.
 The antenna placement is crucial for maximum performance, both
for the transmitter and for the receiver. Here are some things in this
regard:
 Avoid installing the unit transmitters and receivers at a distance ex-
ceeding 50 meters.
 If it is possible do not place the antenna in close proximity to people or things moving.
 In addition:
INSTRUMENT INSTALLATION
 The following procedures must be performed by qualified
personnel.
 All connection must be performed with instrument turned
off.
The instrument is secured by 2 screws inserted into holes (diameter 6 mm)
indicated by the arrows in the figure. Distance between holes 108 x 45 mm.
The overall dimensions are (122 x 75 x 42 mm) excluding antenna and
connector / cable gland.
!
RRF installation and operating manual Pag. 7
YES
NO
Do not install the instrument too close to
walls. The ideal distance should be
greater than 35 cm from the antenna.
NO YES
Keep as much as possible the same antenna orientation, possibly oriented in vertical.
NO
Install the instrument away from metal parts.

POWER SUPPLY
PC CONNECTION
In this case the instrument can be powered directly through the USB port, with the standard USB communi-
cation cable (5Vdc, 50mA). The transceiver can be provided with the cable already installed for direct con-
nection.
ATTENTION:
Observe power supply polarity.
RRF installation and operating manual
CONNECTION TO OTHER EQUIPMENT
In case of serial connection(Rs232 / Rs485) power the transceiver with a volt-
age of 5Vdc / 50mA, through the terminal shown in the figure.
Mors. 1 + 5 Vdc (positivo)
Mors. 2 Massa (negativo)
Pag. 8
INSTRUMENT INSTALLATION
NO YES
The transmission efficiency is sensitive to vibration. Fasten the instrument and use the dumpers.
RS232 SERIAL CONNECTION
!
 To make the serial connection use a shielded cable, making sure to ground the shield at
one of the two ends. In the event that the cable has a number of conductors in excess of
those used, connect the unused conductors to the shield.
 The serial connection cable must have a maximum length of 15 meters (regulations EIA RS-
232-C), in the event of length exceeding 15 meters must be adopted the Rs422.
 The cable must not be channelled with other cables (for example outputs connected to con-
tactors or power cables), but must follow his own path.
2Signal Ground (SGND)
3TX Data
4RX Data
Shield
Connect the cable to the terminal block inside the instrument.
Connect the shield at the point indicated.
Dumpers

RRF installation and operating manual
RS422 / RS485 SERIAL CONNECTION
!
5Data + (positive)
6Data - (negative)
Shield
Connect the cable to the terminal block inside the instrument.
Connect the shield at the point indicated.
 The serial connection cable must be of the suited type for RS422/RS485 serial communica-
tion with one pair twisted for RS485 and the its shield.
 The cable must not be channelled with other cables (for example outputs connected to con-
tactors or power cables), but must follow his own path.
USB CONNECTION
The USB cable is connected via the terminal block inside the instrument.
In the version with USB cable already wired, simply insert it into the port of the PC like a normal de-
vice.
1+ 5 Vdc (VBUS)
2Data - (negative)
3Data + (positive)
4GND
When using serial interface RS232/RS485, you can connect USB interface for PC program-
ming by using the terminal block inside the instrument, taking care to disconnect the serial
unit.
Pag. 9
As a result of a change, power cycle the instrument to
make the change effective.

RF CHANNEL SELECTION
The RF channel selection is done by dip-switch, accessed by removing the instrument cover.
The dip-switch group concerned is close to the of the container, as shown in the figure.
RF Channel Dip-switch Position
0 (868,19 MHz) 1=OFF, 2=OFF, 3=OFF
1 (868,34 MHz) 1=ON, 2=OFF, 3=OFF
2 (868,49 MHz) 1=OFF, 2=ON, 3=OFF
4 (868,80 MHz) 1=ON, 2=ON, 3=OFF
5 (868,95 MHz) 1=OFF, 2=OFF, 3=ON
6 (869,11 MHz) 1=ON, 2=OFF, 3=ON
11 (869,87 MHz) 1=OFF, 2=ON, 3=ON
SELECTING THE NUMBER OF TRF IN THE NETWORK (MULTI)
In MULTI mode, operation mode exemplified by application 4, 5 and 6, must be select the number of TRF
transmitters connected via radio.
In mode SINGLE and DIRECT, this selection is not considered.
The selection of the number of TRF is made through the dip-switch, accessed by removing the instrument
cover. The dip-switch group concerned is close to the block terminal, as shown in the figure.
During normal operation keep the dip-switch 4 = OFF.
!
Dip switch Binary bit
1Bit 0
2Bit 1
3Bit 2
4Bit 3
Example: n. 2 TRF: 1=Off, 2=On, 3=Off, 4=Off
Example: n. 3 TRF: 1=On, 2=On 3=Off, 4=Off
As a result of a change, power cycle the instrument to make the change effective.
As a result of a change, power cycle the instrument to make the change effective.
RRF installation and operating manualPag. 10

INSTRUMENT CONFIGURATION
The programmable parameters in the instrument are:
 Operation mode (MULTI, SINGLE, DIRECT)
 Continuous transmission frequency (from 1 to 5 Hz)
 Communication protocol: (continuous or on request)
 RF transmission power (from 0.15mW to 10 mW)
The programming of these parameters is performed using the PC application PWIN38 that allows through a
wizard to configure the RF system in few steps. The PC is connected via USB port used as Virtual COM
Port; alternatively the PC can be connected via Rs232. Refer to the manual of the software for the program-
ming procedures. The communication parameters are fixed at 38400,N,8,1.
RRF installation and operating manual Pag. 11

STATUS LED
Inside the container there is a LED indicator, which signal the
following conditions:
DIRECT MODE: blink to indicate a data reception.
SINGLE and MULTI MODE: indicates the proper operation or
malfunction of the instrument. The table below shows the differ-
ent conditions:
N. of flashes every 5 sec. Description
0Instrument turned off
1Normal operating
2Not used
3Failure to programming RF
4Failure to acquire TRF weight
5Set-up period active
Special conditions:
 LED lit: Function of the boot-loader on, waiting to receive file.
 LED blinks continuously : Function of the boot-loader in progress.
FIRMWARE BOOT-LOADER
The instrument has the boot-loader function for firmware update. This
can be done with the instrument installed. The transmission of the
firmware to the instrument is made through RS232 serial port or
through USB, with the appropriate PC application (cod. PWIN01)
which is set to 9600, N, 8.1.
IMPORTANT: The selection “Abilita Imp. RF” must NOT be consid-
ered.
The boot-loader function is activated by placing at ON the dip-switch
4 of block near the edge of the container, shown in the figure.
During normal operation, keep the dip-switch 4 = OFF.
!
RRF installation and operating manualPag. 12

COMMUNICATION PROTOCOL IN MODE SINGLE AND MULTI
RRF installation and operating manual Pag. 13
Where:
 <FLAGS> : Register of flags, encoded as shown in the table below:
The communication parameters are fixed to 38400,N,8,1. The transmission strings are as follows:
Binary Encoding:
0x80 <TRF1> <TRF2> . . . <TRFn> <CS> EOT
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Timeout 1 Out of range Overweight Underweight Unstable weight Negative sign
 <HW>: Most significant byte (bit 23 … bit 16) of the weight value in 24-bit (0xFF if timeout)
 <MW>: Intermediate Byte (bit 15 … bit 8) of the weight value in 24-bit (0xFF if timeout)
 <LW>: Least significant byte (bit 7 … bit 0) of the weight value in 24-bit (0xFF if timeout)
 <VBAT>: Battery voltage in tenths of Volts (binary data)(0xFF if timeout)
 <CS>: Checksum calculated as the sum of the first 6 bytes in binary 2's complement (0xFF - sum)
 EOT: end of transmission; character of end string (ASCII value0x04).
 <PESO>: ASCII string of weight expressed with 8 characters right justified, with any decimal point
and minus sign. (In case of timeout are transmitted 8 characters „-‟).
 <BATT>: ASCII string of voltage battery, 2 characters expressed in tenths of Volts.
 ETX: end of text; text end character (ASCII value 0x03).
 <CHKSUM>: two-character checksum of string data. It is calculated by performing the exclusive OR
(XOR) of all the characters from STX to ETX, STX and ETX excluded. The result of the XOR is de-
composed into two separate characters, considering separately the upper 4 bits (first character) and
the lower 4 bits (second character). The two obtained characters are then encoded ASCII. (Example:
XOR = 5Dh; C C = «5D» that is 35h e 44h).
 EOT: end of transmission; character of end string (ASCII value 0x04).
ASCII Encoding:
0x80 <TRF1> <TRF2> <TRFn> ETX <CHKSUM> EOT. . .
Where:
 <STATO> : weight status, can take the values shown in the following table:
“S” “M” “E” “O” “U” “Z” “T”
Stable weight Weight in motion Out of range Overweight Underweight Initial zero not performed Timeout
String for weight request:
In case of transmission on request, for both encoding type, The request string is as follows:
0x80 “N” EOT
Where:
 “N”: character identifier of the request (ASCII value 0x4E).
 EOT: end of transmission; character of end string (ASCII value 0x04).
<STATO> <PESO> <BATT>
Where <TRFx> consists of 3 fields:
<FLAGS> <HW> <MW> <LW> <VBAT>
Where <TRFx> consists of 5 fields:

TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
No communication
Transceiver turned off Verify that the instrument is power supplied
correctly by referring to this manual
Wrong wiring
Check connection by referring to this manual
No radio communication Verify the installation by referring to this manual
Hardware failure Use the diagnostic LED to indicate the fault
detected
The receiver does not
receive the correct string
Incorrect communication
parameters
Correctly program the communications
parameters referring to this manual
Configuration or
communication protocol was
not applied correctly
Check the protocol applied by referring to this
manual
RRF installation and operating manualPag. 14