Futaba FDP02 Users Manual

WIRELESS DATA COMM UNICATI ON MODEM

FDP02TJ010

2.4GHz Embedded Type Wireless Modem

Instruction Manual

Futaba Corporation

Industrial Radio Control

I

Ver.1.1

I Notice

This device complies with pa rt 15 o f the FCC rules. Operation is subject to the f ollowing
two conditions: (1) This device may not cause ha rmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation.

This equipm ent has be en tested and found to comply with the lim its for a Class A digital
device, pursuant to part 15 of the FCC Rul es. These lim its are designed to provide
reasonable protection against harm ful interfer ence when the equipm ent is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in acco rdance with the instru ction m anual, m ay cause
harmful interference to radio comm unications. Operation of this equip ment in a re sidential
area is likely to cause harmful interference in which case the user will b e required to correct
the interference at her/his own expense.

Any unauthorized changes or m odifications to this device not expressly approved by Futaba
Corporation could void the user ’s author ity to opera te th e device and possibly result in
damage to the equipm ent and/or cause serious or f atal injuries to th e operato r or nearb y
personnel.

This device is intended to be installed and used in accordance with the instructions contained
in this manual. Failure to com ply with the se instructions could void th e user’s authority to
operate the device and possibly result in dam age to the equipm ent and/or cause serious or
fatal injuries to the operator or nearby personnel.

II Important Safety Information

The list of dangers, warnings and cautions in th is section contain important information that
will help en sure safe op eration of the system . Please read carefully and understand all of
these items. All installers, operators and m aintenance personnel should read and understand
this information before installation, use, or maintenance of the FDP02TJ010.

The FDP02TJ010 system by itself is not inherently dangerous. HOWEVER, WHEN THE

FDP02TJ010 IS CONNECTED TO OTHER EQUIPMENT FOR THE PURPOSE OF
CONTROL, SAFETY AND ALL POSSIBLE ASSOCIATED DANGERS MUST
ALWAYS BE GIVEN THE UTMOST CONSIDERATION DURING SYSTEM
INTEGRATION, DESIGN, INSTALLATION, AND USE.

The FDP02TJ010 m ay be used in virtually unlim ited applications. Many of these
associated s ystems can, by them selves, pose a mechanical, electrical or o ther hazard to
operators and other persons or equipm ent. To address all possible applications and
associated s afety hazard s in th is m anual would be im possible. The warnings below and
throughout this m anual give information th at will allow safe installatio n and use the m odem
system applications. If you have questions regarding the safety of your specific application,
please contact th e ap propriate people for help. Your Futaba sales representative,
representatives of the equipm ent being controlled, and the t echnical support staff at local
branch of F utaba Corporation are among those who can provide assistan ce with your safety
concerns.

The following warnings are included in the lists that follow but warrant repetition here:

In installations where the FDP 02TJ010 is used to control moti on or operation of potentially
dangerous equipment, it is imperative for safety that all operat ors and installers be thoroughly
trained in the normal function of that equipment before attempting to control it remotely with
the FDP02TJ010.

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Ver.1.1

To help ensure safe operation of the equipment, the FDP02TJ010 must be connected so that it
will operate in a f ail-safe way. In other words, the equipment being controlled should stop
or return to its saf est state in the abs ence of a control signal or tota l loss of RF transmission
from the FDP02TJ010. Our system uses one of the m ost reliable m ethods available to
transmit data using radio signals. Many factors can affect a radio signal that m ay block it
or interfere enough to disr upt regular transm ission. Because of this, equipm ent motion or
dangerous electrical current, for ex ample, th at continues during a loss-of-signal condition
could be very dangerous.

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Ver.1.1

Four sym bols are used in the m argin of th e following section and throughout the m anual to
indicate the level of hazard or information listed.

The symbols are defined as follows:

Indicates a hazard that will cause severe personal injury, death, or

substantial property damage if the warning is ignored.

Indicates a hazard that can cause severe personal injury, death, or

substantial property damage if the warning is ignored.

Indicates a hazard that will o r ca n cause m inor person al inju ry, or
property damage if the warning is ignored.

Indicates installation, operation, or maintenance inform ation that is
important but not hazard-related.

Please read the following safety inform ation carefully. Som e of these notice s are
duplicated throughout the manual, in areas of associated content, for your benefit.

II.I General Safety Hazards and Notes

Improper installation and/or operation of the FDP02TJ010 can cause
serious or fatal injuries to the operator or nearby persons and cause
damage to the FDP02TJ010, and any equipment it is used to control.
Please read and understand this manual completely and the manual of
all equipment being controlled before attempting to operate or install
this system.

Always keep this m anual at a lo cation read ily accessib le to anyone
operating the system and related equipm ent. Ensure that all operators
have read and understood this manua l, especially all safety and
operation procedures contained in it. Please refer to the section in this

manual title d How to Obtain Help for the contact that can supply

additional manuals or answers to ques tions not covered in this m anual.
If this product is passed on to a diffe rent user, be sure that this m anual
accompanies the product.

Be certain that the installer of this equipment reads and understands the

instruction manual of the equipment that is being connecting to before

attempting this installation.

The FDP02TJ010should NOT be used in a m anner in which failure of

the product or loss of the radio si gnal could cause damage to the
equipment being controlled, or to a nything in the area in which such
equipment is located. All integr ated control system s should be
designed for “fail-safe” operation so that a temporary or permanent loss
of signal will not endanger any pers on, critical process, or equipm ent
(refer to the beginning of the safety section for further explanation).
The system design shou ld ensu re that the equipm ent being controlled
will initial to its safest state in the event of signal loss.

The FDP02TJ010 contains no user serviceable parts. If the unit
requires service, contact your sales representative or local branch of

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Ver.1.1

Futaba Corporation per instructions the section titled How To Obtain
Help. Do not disassem ble or atte mpt to repair the F DP02TJ010

yourself. Doing so could void your warranty and m ay void the user’s
authority to operate the device.

Contact Futaba before using th e FDP02TJ010 in safety critical
applications such as m edical equip ment, aircraft, hazardou s m aterials
handling, etc.

II.II Installation Safety Hazards and Notes

Use only the proper regulated DC voltage supplied to the FDP02TJ010.
Use of any other voltage m ay permanently damage the m odem and/or
cause the modem to malfunction and create a shock or fire hazard.

Be certain that all AC power outlets used the power adapters have been
properly installed, grounded, and fused. An electrical s hock hazard
may exist if this unit is powered by a faulty power outlet or source.
If such a situation is dis covered, immediately discontinue use until the
power source and outlet have been properly installed, grounded, and
fused by an electrician or other authorized person.

Be sure to wire the power and

Ethernet connections correctly. Incorrect
wiring can dam age the system , cause it to m alfunction and/or create a
shock and fire hazard.

Ensure that the FDP02TJ010 power a nd the pow er to the equipm ent to
be controlled are turned off befo re connecting or disconnecting the
cable between them. This will help prevent accidental damage to the
system and unexpected operation and/or injury.

Be sure the FDP02TJ010 power, the power to the equi pment th at is
being connecting to it, and the DC power sou rce are all turned off
before wiring and connecting the power cable.

Be sure th at th e sup plied powe r is with in the spec ified r ange.
Voltages outside the specified range may damage the FDP02TJ010.

Be sure th at the po wer source has sufficient cu rrent capacity .
Insufficient current may cause the unit to malfunction.

Securely attach the antenna cable to the FDP02TJ010 and
equipment/power source to which it is connected. Failure to do so
could cause an unexpected system failure.

Below comment should be written on a product label when the FDP02
is embeded into any products.

“This device contains FCC ID:AZP-FDP02”

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Ver.1.1

II.III Antenna Installation Hazards and Notes

Be sure to keep all system s and antennas clear of power lines .
Permanent equipm ent dam age and severe shock injury or death can
occur if the system contacts power lines.

Contact Futaba before connecting a ny antenna not provided by Futaba
specifically for the FDP02TJ010. Attaching any non-authorized
antenna may be in violation of FCC regulations.

Before each use, verify that the an tenna (and antenna cable, if used) is
securely attached and in good con dition. A loose antenn a or cable
may severely reduce the operating range of the system.

The FDP02TJ010 operates at frequencies in the 2.4 GHz band.
These frequencies are more directi onal than lower frequencies and are
easily reflected. If there are m etal structures nearby, the effective
range m ay be shortened or the dir ectional properties m ay be further
narrowed. To help avoid this, mount th e antenna as far away as
possible from surrounding metallic structures.

Multipath p roblems occur easily at frequencies in the 2.4 GHz band.
When m ultipath prob lems are pres ent, m oving the an tenna around 10
cm may result in improved communication or, conversely, worsened or
complete loss of communication. Futaba recomm ends that the

mounting position of the antenna be dete rmined after testing and

verifying optimal communication conditions.

When installing multiple FDP02TJ010 that will use different frequency
groups in the same area, FDP02TJ010’s antennas of different frequency
groups must be mounted at least 6 feet (2 meters) apart. Failure to do so
may severely reduce the modem operating range.

Please contact Futaba for inform ation about antenna separation when
using the FDP02TJ010 and other wireless products in the same area.

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Ver.1.1

II.IV Environmental Safety Hazards and Notes

If the FDP02TJ010 has been stor ed at a temperature beyond the
specified o perating temperature range for th e system , it m ay not
function pro perly. Allow it to re turn to norm al tem peratures before

use. Refer t o APPENDIX A – TECHNICAL SPECIFICATIONS for t he

actual operating temperature range.

The FDP02TJ010 is a precision electr onic device with a rugged design
that is in tended for industrial applications. However, do n ot install it
where it will encoun ter excessive vibrations. In some cases, isolation
mounts m ay be used to isolate the m odem from the equipm ent’s
vibration. Excessive vibration can perm anently dam age the m odem
and/or cause it to malfunction.

Do not ope rate th e FDP02TJ010 in environments where it will b e
subjected to excessive moisture (such as rain or water spray ), dust, oil,
or other foreign m atter (such as metal partic les). Doin g so m ay
permanently dam age the m odem and/or cause it to m alfunction. If it
does become wet or contam inated, co rrect the situation, verify proper
operation and have any problem s correct ed before using it to control
other equipment. If necessary, the m odem can be m ounted inside a
protective o r waterproo f enclosure. If the enclosure is m etallic, th e
antenna m ust be m ounted externally or the effective operating range
will be severely limited.

II.V Other Notice

The FDP02TJ010 is designed for indoor use. When using it outdoors,
the m odem should be m ounted in a waterproof enclosure and the
ambient temperature range should be check ed to insure that it is within
the m odem’s specifications. Always use the m odem within its
specified environmental ranges.

Italicized gothic word used in th is m anual shows functional and

technical term especially important for the FDP02TJ010.

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Ver.1.1

Operational Safety Hazards and Notes

Before each use of the FDP02TJ010, ensure th at th e area where th e
equipment will be ope rated is cle ar of people or obstac les that m ay
affect its safe operation.

Before each use of the FDP02TJ010, verify th at both the equipm ent
being controlled and the modem are in proper operating condition.

When rewriting the FD P02TJ010’s m emory registers, do not turn the
modem’s power off. If the power is interrupted, the m emory contents
may be lost or corrupted an d the m odem operation will be
unpredictable. If the memory contents are lost or corrupted, they m ay
be restored to original initial settings by reinitializing them.

Do not atte mpt to ope rate rem otely controlled equipm ent outside the
communication range of the FDP02TJ010. Doing so could cause loss
of control of the equipment.

III System Identification

For future reference, please take a moment to fill in the information below. This information
will help us respond as quickly as possible should your FDP02TJ010 ever need repair or
replacement.

Model Name and Number: FDP02TJ010

Serial Number:

Date of Purchase:

Distribu tor Name:

Distributor Address:

Distributor Phone Number:

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Ver.1.1

IV Limited Warranty

FUTABA WARRANT S ONL Y T HAT T HE I NDUSTRIAL RADIO CONT ROL SYSTE M
GOODS OR PRODUCTS FURNISHED HEREWITH SHALL BE FR EE FROM DEFECTS
IN MATERIAL AND WORKMA NSHIP UNDER NORMAL CONDITIONS OF USE AND
SERVICE FOR A P ERIOD OF ONE (1) YE AR FROM THE DATE OF SALE TO THE
PURCHASER WHO IS THE FIRST B UYER OF THE GOODS FOR USE OR
CONSUMPTION AND NOT FOR RESALE OT HER T HAN AS A COM PONENT OF
ANOTHER PRODUC T MANUF ACTURED FOR SALE BY S UCH PUR CHASER
(“CONSUMER”). FUTABA’S L IABILITY, W HETHER BASED ON B REACH OF
WARRANTY OR NEGLIGENCE, SHALL BE LIMITED, AT FUTABA’S ELECTION, TO
REPLACEMENT OR REPAIR OF ANY SUCH NONCONF ORMING GOODS, F. O.B.
FUTABA’S PLANT, OR, AT FUTABA ’S ELECTION, CREDIT FOR THE NET
PURCHASE PRICE OF SUCH GOODS. ALL CLAIMS HEREUNDER MUST BE MADE
IN WRITING DURING THE WARRANTY PERIOD, AND FUTABA SHALL HAVE THE
RIGHT P RIOR TO ANY RET URN OF GO ODS TO INSP ECT ANY GOODS CL AIMED
TO BE NONC ONFORMING, AND IN ANY EVE NT RESER VES THE R IGHT TO
REJECT CLAIMS NOT COVERE D BY WA RRANTY. THIS LIMITED WARRANTY

CONSTITUTES FUTABA’S SOLE W ARRANTY. FUTABA MAKES NO OTHER

WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, AND EXPRESSLY
DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. FUTABA’S WARRANTY SHALL NOT APPLY IF,

AMONG OTHER LIMITATIONS CONT AINED HEREIN OR FUR NISHED W ITH THE
PRODUCT, BUYE R, OR C ONSUMER, OR ANY USER OF T HE PR ODUCT (A)
ALTERS SUCH PRODUCT, OR (B) REPLACES ANY PART OF SUCH PRODUCT WITH
ANY PART OR P ARTS NOT FURNISHED BY FUTABA FOR THAT PURPOSE, OR IF,
AMONG S UCH OTHER LIMITATIONS, P RODUCT FAILS TO OPERATE PROPERLY
OR IS DAMAGED DUE TO AT TACHMENTS OR COMPONENT S THAT ARE NOT
FURNISHED BY F UTABA FOR USE W ITH OR REP AIR OF THE PRODUCT UNLES S
SUCH USE IS AUTHORIZED IN WRITING IN ADVANCE BY FUTABA.

THIS LIMITED WARRANTY EXTENDS ONLY T O T HE C ONSUMER AND IS NOT
ASSIGNABLE OR TRANSFERABLE. This lim ited warranty shall not apply to fuses,
lamps, batteries, o r oth er item s that are expe ndable by nature, unless otherwise expressly
provided.

This limited warranty does not cover any defect or dam age to any of the goods caused by or
attributable to force, accident, m isuse, abus e, f aulty installa tion, improper m aintenance,
improper electr ical cur rent, f ailure to insta ll or operate in a ccordance with Futaba ’s writte n

instructions, repair or a lteration by unauthorized pers ons, or leaking batteries. THE

GOODS ARE SENSITIVE ELECTRONIC DEVICES REQUIRING SPECIAL
HANDLING, AND THIS LIMITED WARRANTY DOES NOT APPLY TO
PRODUCTS NOT HANDLED IN ACCORDANCE WITH INSTRUCTIONS SET
FORTH IN THE MANUAL.

THIS LIMITED WARRANTY DOES NOT COVER INDUSTRIAL RADIO
CONTROL PRODUCTS PURCHASED OR USED OUTSIDE OF THE UNITED
STATES WITHOUT FUTABA’S PRIOR APPROVAL.

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Ver.1.1

V Returns

Futaba’s authorization must be obtained prior to return of any item for warranty or other
repair or replacem ent or credit and will re flect Futab a’s warran ty service p rocedure.
Consumer’s warranty rights are governed by the term s of Futaba’s L imited W arranty, as
above described. Products returned for warrant y repair or replacem ent or credit m ust be
carefully and securely packed for return, preferably in the original carton or equivalent. The
Consumer must also include in the carton a legible copy of th e bill of sale or invoice which
shows the date of sale and the original Buye r’s and Consum er’s names, and also a letter
which gives the Consum er’s return address and contact telephone nu mber, the model and
serial numbers of the product(s) returned, and a brief explanation of the problem or claim ed
defect. Any returned products that are repl aced by Futaba shall becom e the property of
Futaba. If af ter in spection Futab a dete rmines the def ect is no t co vered by its lim ited
warranty, Futaba will notify Consumer of its determination and will not undertake any repairs
or product replacem ent until Consu mer agrees to pay for all necessary parts and m aterials,
labor (to be charged at Futaba’s standard repa ir ra te then in ef fect), and other expenses
including all shipping charges and insurance. Futaba rese rves the right to r etain possession
of any product returned by Consumer because of defects not covered by Futaba’s warranty
until Futaba receives Consum er’s agreem ent as above note d or, if Consum er wants the
product returned without repair o r replacement, Consumer reimburses Futaba for all shipp ing
and handling charges incurred by Futaba. Issuance of credit for returned items shall be made
at Futaba’s unfettered discretion. Consumer will not be entitled to return defective goods for
cash refunds. Consumer m ust inspect goods i mmediately and no rejection or revocation of
acceptance shall be perm itted m ore than ten (10) days after delivery to, or first use by,
Consumer of the goods, whichever occurs first.

VI Patents – Copyrights – Trademarks – Proprietary Rights

If this product was m anufactured according to designs or pr ocesses specified by Consum er,
Consumer shall indem nify and sav e Futaba, it s af filiates, of ficers, ag ents, and e mployees,
harmless from any expense, loss, attorneys’ fees , costs, damages, or liability which may be
incurred as a result of actual or alleged infringement of patent, copyright, or trademark rights.
Furnishing of these products does not convey a license, implied or otherwise, under any
patent, copyright, or trademark right in which Futaba has an interest, nor does it convey rights
to trade secrets or any other proprietary information of Futaba.

Limitation of Damages and Action

VII

IN NO EVENT SHALL FUTABA BE LIABLE TO CONSUMER, OR ANY OTHER
PERSON FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES
RESULTING FROM THE USE OF OR INABILITY TO USE THIS PRODUCT,
WHETHER ARISING FROM BREACH OF WARRANTY OR NEGLIGENCE OF
FUTABA, OR OTHERWISE. Any action hereunder must be com menced within one (1)

year of accrual of cau se of action or be barred and foreve r waived. No m odification or
alteration of Futaba’s Limited Warranty or any ot her provision of this paragraph or the above
paragraphs shall result from Futaba’s acknowle dgment of any purchase order, shipm ent of
goods, or other affirm ative action by Futaba to ward perform ance following receip t of any
purchase order, shipping order, or other form containing provisions, term s, or conditions in
addition to or in conflict or inconsistent with any such provisions.

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Ver.1.1

Contents

1. Overview.................................................................................................................................................. 1

2. Operating Modes ...................................................................................................................................... 1

2.1 Pa cket Transmission Mode..................................................................................................................... 1

2.2 He aderless Packet Transmission Mode .................................................................................................. 3

2.3 Serial-Output Data Format of Receiver Side at The Transmission Mode .............................................. 4

2.4 Broadcast Transmission Mode ............................................................................................................... 5

3. Transmission Timing................................................................................................................................ 6

3.1 Transmission Timing.............................................................................................................................. 6

3.2 Time period of the case that data re-transmission of divided packet is occurred at packet transmission

mode.................................................................................................................................................... 10

4. Low Power Stand-by Mode.................................................................................................................... 11

4.1 Operation Flow ...................................................................................................................................11

4.2 Setting ................................................................................................................................................. 11

4.2.1 Setting by the memory register........................................................................................................ 11

4.2.2 Setting by the command .................................................................................................................. 11

5. RF Circuit Power Control Mode ............................................................................................................13

5.1. Operation Flow ...................................................................................................................................13

7. Registers ................................................................................................................................................. 15

7.1. List of Registers ..................................................................................................................................15

7.2 E xplanation of Registers ......................................................................................................................16

8. Frequency ............................................................................................................................................... 25

8.1 Fre quency Range.................................................................................................................................. 25

8.2 Fre quency Setting and Frequency Group............................................................................................. 26

8.3 Commands............................................................................................................................................ 27

8.3.1 L ist of commands.............................................................................................................................. 27

8.3.2 C ommand input format .....................................................................................................................27

8.3.3 E xplanation of commands.................................................................................................................

28

9. Interface..................................................................................................................................................45

9.1 Pin Layout ............................................................................................................................................ 45

9.2 Recommended Connector .................................................................................................................... 45

9.3 E lectrical Characteristics...................................................................................................................... 46

9.4 AC Characteristics................................................................................................................................ 46

9.4.2 Low Power Stand-by Mode............................................................................................................. 47

9.5.3. RF Circuit Power Control Mode......................................................................................................48

9.5.4. Power Down Mode .............................................................................................................................49

9.5.5. Parameter Initializing by /SHUT and /INI Terminal .......................................................................50

10.1 Outer Dimensions............................................................................................................................... 51

10.2 Weight ................................................................................................................................................ 51

10.3 Power Supply .....................................................................................................................................51

10.4 Radio Specifications........................................................................................................................... 52

10.5 Interface..............................................................................................................................................52

10.6 Environment.......................................................................................................................................52

11. Notes..................................................................................................................................................... 53

11.1 Da ta Communication Delay ............................................................................................................... 53

11.1.1 Dela y at the transmission side .........................................................................................................53

11.1.2 Dela y at the reception side .............................................................................................................. 53

11.2 Reception of Same Packets ................................................................................................................ 53

11.3 Timing of Command Input................................................................................................................. 53

11.4 He aderless Packet Transmission Mode .............................................................................................. 54

11.4.1 In put data ......................................................................................................................................... 54

11.4.2 Meas ures against packet loss...........................................................................................................54

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11.5 Occurrence of Data Loss Even under Hardware Flow Control .......................................................... 54

11.6 Freque ncy Setting in Multi-System Environment .............................................................................. 54

11.7 Timing of Command Input................................................................................................................. 54

11.8 INI and RST Commands .................................................................................................................... 54

11.9 Power -Down Mode ............................................................................................................................ 54

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Ver.1.1

1. Overview

The FDP02TJ010 (hereinafter referred to as the "FDP02") is a 2.4GHz-band wireless radio modem with a
compact and low power consumption design.

2. Operating Modes

The FDP02 has the following three transmission modes:

- Packet transmission mode

- Headerless packet transmission mode

- Broadcast transmission mode

2.1 Packet Transmission Mode

The FDP02 supports two types of wireless addresses. One is unique address and the other is group address.
At packet transmission mode, data packets are transmitted to the unique address and/or group address through
the serial port. AT this mode, the packet format should be text or binary data.

(1) Configuration of text packet

Command header Command

1 byte 3 bytes 3 bytes 0 to 130 bytes 2 bytes

@ TXT 000 to 255 User defined data <Cr><Lf>

(2) Configuration of binary data packet

Command header Command

1 byte 3 bytes 3 bytes 3 bytes 0 to 130 bytes 2 bytes

@ TBN 000 to 255 000 to 130 User defined data <Cr><Lf>

Processing of packet transmission and reception

When a packet is inpu t to a sen der FDP02 via the serial port, the sender FDP02 checks whether the packet is
valid.
Then, i f t he packet configuration is invalid o r a t ime gap bet ween bytes is more than 5 sec onds, the sender
FDP02 distinguishes an occurrence of a packet error and ignores the packet. At that time, the sender FDL01
notifies the occurrence of the packet error if the functions of "Enabling response" and "Enabling N0 response"
in he REG13 are turned on.
If the functions of “Enabling response” and “Returning P1 and P0 responses” in the REG13 register are turned
on, the se nder FDP02 replies a P1 response to the host whe n it receives a valid pac ket data. However, the
sender FDP02 does not return any response if the functions of the REG13 register is different setting. Then,
the sende r FDP02 tra nsmits the packet t hrough wireless transm ission to the destination a ddress, receiver
FDP02.
At receiver FDP02 side, it output the packet data through the serial port if configurations of packet are valid.
At that time, the receiver FDP02 responds an acknowledgement “ACK” signal to the sender FDP02 for
notifying data packet receiving if "Enabling destination address check at reception" function of the REG18
register is turned on. On the other hand, when the function of "Disabling destination address check at
reception" in the REG18 register is turned on, the receiver FDP02 does not return ACK signal to the sender
FDP02 and also it receives all packet data regardless of the destination address of the packet.
Packet data transmission from the sender to the receiver is finished when the sender FDP02 receives ACK
signal. At that time, the sender FDP02 outputs P0 response if "Enabling response" functions of the REG13
register is turned on. When the sender FDP02 cannot receive ACK signal within the time-out limit, the
sender FDP02 transmits the same packet data to the destination receiver through the air if the re-try frequency
is registered. (The re-try frequency can be set by REG11 register
When the receiver FDP02 receives the same packet several times, it ignores from the second data downward.

Destination

address

Destination

address

Data (message) Delimiter

Number of

data bytes

Data (message) Delimiter

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Ver.1.1

Also, the receiver FDP02 sends ACK signal to the sender FDP02 if the function of "Enabling destination
address check at reception" of REG18 register is turned on.
If the sender FDP02 cannot receive ACK signal even it sent packet data defined times by the REG11 register,
it outputs N1 response to the host device via the serial port when "Enabling response" function of REG13
register is turned on. No response signal is sent if the function of "Disabling response" in REG13 is turned
on

The figure below shows an operation example of data packet communication between a sender FDP02 that the
"Enabling response" and "Returning P0 and P1 responses" functions of REG13 register are turned on and a
receiver FDP02 that "Enabling destination address check at reception" function of REG18 register is turned on.
At the figure, data communication is completed by “ACK” signal retry.

① The Host 1 inputs data to the sender FDP02 via the serial port.
② The sender FDP02 recognizes the data packet configuration as valid and returns a P1 response to the Host

1 (Data is accepted).

③ The sender FDP02 transmits the data packet to the destination, which is the receiver FDP02, by wireless

transmission.

④ The receiver FDP02 receives the packet and outputs the received data packet to the Host 2 via the serial

port.

⑤ The receiver FDP02 returns ACK to the sender FDP02 by wireless transmission.
⑥ Time-out is occurred at the sender FDP02 because it cannot receive the receiver's ACK signal at the first

transmission. The sender FDP02 re-sends the data packet transmission.

⑦ The receiver FDP02 receives the same data packet as the previously received one. Thus, the receiver

FDP02 ignores the received data but returns ACK signal to the sender FDP02.

⑧ The sender FDP02 receives the ACK signal and outputs a P0 response to the Host 1.

Data input

P1 response

Host 1 FDP02 (sender) FDP02 (receiver) Host 2

①

②

Time-out

Wireless transmission

Return of ACK

③

⑤

④

Data output

P0 response

⑧

Wireless transmission

Return of ACK

⑥

⑦

⑦

The data same as previously
received data is received and
discarded.

After entering a command to the sender FDP02, do not input the next command
until the P0 response for the entered command is returned. Sending a new
command before the P0 response is received, it may cause of command error
and/or unpredictable operation.
When "Disabling response" function of REG13 register of the sender FDP02 is
turned on, the next command should be input after waiting a time period of
expected P0 response.

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Ver.1.1

2.2 Headerless Packet Transmission Mode

By setting "Headerless packet transmission mode" on the REG03 register of the FDP02, the FDP02 transmits
packets by wireless transmission to a destination address that is defined by the REG02 register. At this mode,
a header part (command header "@", command "TXT" or "TBN", destination address, and number of message
bytes [for TBN command]) can be eliminated. The trigger of data transmission can be defined by the setting
of REG24 register. It can be selectable entering of "<Cr><Lf>" (0DH, 0AH) (i.e., carriage return and line
feed codes) or time over of the timeout period (a time gap limit between two data bytes that is set in the
REG26 register). Data transmission is triggered also when the number of message bytes exceeds 26 bytes.
It is also enable to set "Enabling response" and "Disabling response" mode in
headerless packet transmission mode. Additionally, "Returning P1 and P0 responses" and "Returning P0
response" function can be selected when "Enabling response" mode is chosen. Moreover, "Enabling
destination address check at reception" and "Disabling destination address check at reception" function can be
selected by the REG18 register. For more details, see section 2.1 “Packet transmission mode”.
Also, it is selectable whether "<Cr><Lf>" (0DH, 0AH) is added on the received data by the settings of the bit
4 of the REG23 register.

In headerless packet transmission mode, maximum data buffer size for sending
data is 130 bytes and data transmission is started when message data size exceeds
26 bytes. When many message data are input consequently, the message buffer
may be overflowed and the message data may be lost. At that situation, the
hardware flow control function should be set. If "Enabling response" function
is selected in REG13 register, it is possible to judge whether data transmission is
succeeded or not. Thus it is recommended to set "Enabling response" function
even in headerless packet mode.
Additionally, the massage data may be lacked when the size is over 26 bytes.
To prevent for such an event, check each response on the sender and create
messages so that the loss of packets can be detected on the receiver FDP02.

The serial communication speed of all FDP02 should be same setting. If
different serial communication speeds are set between on
receiver FDP02, data loss may occur on the slower speed side.

by the REG13 register at the

the sender and the

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2.3 Serial-Output Data Format of Receiver Side at The Transmission Mode

Data format of the receiver side that outputs to the serial port varies depending on the transmission mode
(packet transmission or headerless packet transmission mode). The below table shows combination of the
data format and the mode setting.

Sender FDP02 (radio address is 000) Receiver FDP02 (radio address is 001)

Transmission mode Packet format Transmission mode Serial-output data format

Packet transmission (text
format)

Packet transmission
(binary format)

Packet transmission (text
format)

Packet transmission
(binary format)

Headerless packet
transmission + <Cr><Lf>

Headerless packet
transmission + time-out

Headerless packet
transmission + <Cr><Lf>

Headerless packet
transmission + time-out

@TXT001HELLO<Cr><Lf>

@TBN001005HELLO<Cr>
<Lf>

@TXT001HELLO<Cr><Lf>

@TBN001005HELLO<Cr>
<Lf>

HELLO<Cr><Lf>

HELLO

HELLO<Cr><Lf>

HELLO

* If "Adding '<Cr><Lf>' to received data" function of the receiver FDP02 is turned on by the bit 4 of REG23

(setting value is 1) at the headerless transmission mode, "<Cr><Lf>" is added at the end of the data that is
output to serial port.

Packet transmission

Packet transmission

Headerless*

Headerless*

Packet transmission RBN000007HELLO<Cr><Lf>

Packet transmission

Headerless*

Headerless*

RXT000HELLO<Cr><Lf>

RBN000005HELLO<Cr><Lf>

HELLO

HELLO

<Cr><Lf>

RBN000005HELLO<Cr><Lf>

HELLO<Cr><Lf>

HELLO

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Ver.1.1

2.4 Broadcast Transmission Mode

It is possible to send data by broadcast transmission. Broadcast transmission mode can be used by setting the
destination address to “255” at packet transmission or headerless packet.
In broadcast transmission mode, the sender FDP02 transmits data packet defined times by REG11 register + 1
time. If "Enabling response" function is turned on, the sender FDP02 sends response signal to the host. For
more details, see the section 2.1.
At broadcast transmission mode, the receiver FDP02 does not return ACK signal regardless of the REG18
register setting. Also, when the receiver FDP02 receives redundant data packet, it ignores duplicated
packets .

The below figure shows the data flow of broadcast transmission mode that "Enabling response" and
"Returning P0 and P1 responses" functions of the sender FDP02 is turned on.

① Host 1 inputs broadcast data to the sender FDP02.
② The sender FDP02 recognized the data packet configuration is valid and returns a P1 response to the host 1

(data is accepted).

③ The sender FDP02 broadcasts data packet defined times by REG11 register + 1 by air .
④ When the receiver FDP02 receives the packet correctly, it outputs the received data packet to the host 2 via

the serial port.

⑤ When the sender FDP02 completes all data transmission, it outputs a P0 response to the host 1.

Input of data with
destination address
set to "255"

P1 response

P0 response

Host 1 FDP02 (sender) FDP02 (receiver) Host 2

①

②

"Retransmission
count' + 1" times

⑤

Wireless transmission

③

Wireless transmission

③

④

Data output

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Ver.1.1

p

p

p

p

3. Transmission Timing

3.1 Transmission Timing

At packet transmission mode, the FDP02 can transmit up to 130 bytes of message as a single packet.
However, the radio transmission unit of the data is divided by 26 bytes. Since the FDP02 internally divides a
message by 26 bytes when the packet size is bigger than 26 bytes, total data transmission time is varies with
the data size. .
In headerless packet transmission mode, the FDP02 transmits each message in units of 26 bytes without
dividing them.
The time required for communication is shown below.

Data input

First message

transmission

Second to fourth
message
transmission

Fifth message
transmission

Host 1 FDP02 (Sender) FDP02 (Receiver) Host 2

①@TXT*** input

②Command processing: 1 ms
③Packet generation (first time): 0.7 ms

④P1 response output

⑩ACK reception

rocessing: 0.7 ms

⑩ACK reception

rocessing: 0.7 ms

⑫P0 response output

⑤Carrier sensing: 0.1 ms

⑥Message transmission: 0.45 ms

⑧ACK packet generation: 0.7 ms

⑨ACK transmission: 0.45 ms

③Packet generation (fifth time): 0.7 ms
⑤Carrier sensing: 0.1 ms

⑥Message transmission: 0.45 ms

⑧ACK packet generation: 0.7 ms

⑨ACK transmission: 0.45 ms

⑦Reception

rocessing: 1.2 ms

⑦Reception

rocessing: 1.2 ms

⑪RXT*** output

4.3 ms

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Ver.1.1

① Serial input of transmission data packet

The time required to data input between the host1 and the sender FDP02 is defined by below
communication parameter.

- Line speed (9,600 to 115,200 bps)

- Data bit length (7 or 8 bits)

- Parity bit (odd, even, or no parity)

- Stop bit length (1 or 2 bits)

- Start bit length (always 1 bit)
For example, data transmission time is 87us when the line speed is 115,200bps, the data bit length is 8 bits,
the parity bit is NONE, the stop bit length is 1 and the start bit length is 1. (Time of data transmission for
1 bit is 8.7us and 1byte is 10bits.)

If the transmission is text data at the packet transmission mode, size of send data packet is message bytes +
9 bytes because the header is 7 bytes and delimiter is 2 bytes.

If the transmission is binary data at the packet transmission mode, size of send data packet is message
bytes + 12 bytes because the header is 10 bytes and delimiter is 2 bytes.
At the headerless packet mode, the data size is message bytes + 2 bytes if delimiter is included. On the
other hand, if the trigger of transmission is “time-out”, the data size is the same as the message size.
However, the data transmission time is defined by “time-out” setting by REG24 and REG26 register.

② C ommand processing
It is the time for internal processing to

of receiving and decoding the packet that comes from the serial port.

It takes 1.5 ms.

③ T ransmission packet generation
It is the time for transmission data packet generation. It takes 1.0 ms.

④ Response of input data format acceptance
It is the time for response when the receiving data format is valid. The length is 4 bytes. It depends on

the parameters of ①.

⑤ Carrier sensing
It is the time for detection whether other radio station uses same frequency band. If other radio station

uses the frequency band, the sender FDP02 does not transmits the data. It takes 0.1 ms.

If the wireless environment is very severe, noise level is very high and/or other
wireless systems occupy the area, the sender FDP02 may be not able to transmit
any data because of carrier sensing.

⑥ Message transmission
It is the time for data transmission and it takes 0.45 ms.

⑦ Dat a reception processing
It is the time for the receiving data processing and it takes 2.4 ms.

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Ver.1.1

⑧ ACK packet generation
It is time for ACK packet generation. It takes 1.0 ms

⑨ ACK packet transmission
It is time for ACK packet transmission that the acknowledgement of data packet reception. It takes 0.45

ms.

⑩ ACK reception processing
It is processing time for ACK packet. It takes 1.0ms.

⑪ Serial output of received packet
It is time for output of received data packet to the host 2 through the serial port. The time period depends

on the communication setting between the host 2 and the receiver FDP02.

If the transmission is text data at the packet transmission mode, size of output data packet is message bytes
+ 8 bytes because the header is 6 bytes and delimiter is 2 bytes. If the transmission is binary data at the
packet transmission mode, size of send data packet is message bytes + 11 bytes because the header is 9
bytes and delimiter is 2 bytes.
At the headerless packet mode, the data size is message bytes + 2 bytes if delimiter is included. On the
other hand, if the trigger of transmission is “time-out”, the data size is the same as the message size. If
"Adding '<Cr><Lf>' to received data" function of the receiver FDP02 is turned on by the bit 4 of REG23
(setting value is 1) at the headerless transmission mode, "<Cr><Lf>" is added at the end of the data and it
consume 2 bytes.

⑫ Indication of data transmit completion
A response is returned to the host 1when the data transmission is completed correctly. The length of

response data is 4 bytes, and the time period of response return depends on the parameter settings of the
communication parameters that are described in above section ①.

Based on the above data processing flow, the total time for the data packet transmission from the host 1 to the

host 2 can be calculated like below. (In the below calculation, no data packet re-transmission is supposed.)

Bit length per byte

× 1000 × (size of message in bytes + A) + B + 6.4 × (C – 1)

Line speed of the sender

Bit length per byte

+ × 1000 × (size of message in bytes + D) + 4.0 [ms] Expression 1

Line speed of the receiver

A: Text data is transmitted at packet transmission mode: 9

Binary data is transmitted at packet transmission mode: 12
Trigger of the data transmission is delimiter at headerless packet transmission mode: 2

Trigger of the data transmission is time-out at headerless packet transmission mode: 0
B: Trigger of the data transmission is time-out at headerless packet transmission mode:
"Value of REG26" x 10

Others: 0
C: Data size of message is 0 to 26 bytes: 1 (*)

Data size of message is 27 to 52 bytes: 2

Data size of message is 53 to 78 bytes: 3

Data size of message is 79 to 104 bytes: 4

Data size of message is 105 to 103 bytes: 5
D: Text data is transmitted in packet transmission mode: 8

Binary data is transmitted in packet transmission mode: 11

Trigger of the data transmission is delimiter at headerless packet transmission mode: 2

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Ver.1.1

Trigger of the data transmission is time-out at headerless packet transmission mode 0
E: <CR/LF> is NOT added to received data: 0

<CR/LF> is ADDED to received data: 2

*At headerless packet mode, the value of C is always 1.

The total time until completion of the data transmission is calculated by below formula.

Bit length per byte

× 1000 × (size of message in bytes + A + 4) + B + 6.4 × C + 1.5 Expression 2

Line speed of the sender

A: Text data is transmitted at packet transmission mode: 9

Binary data is transmitted at packet transmission mode: 12

Trigger of the data transmission is delimiter at headerless packet transmission mode: 2

Trigger of the data transmission is time-out at headerless packet transmission mode: 0
B: Trigger of the data transmission is time-out at headerless packet transmission mode:
"Value of REG26" x 10

Others: 0
C: Data size of message is 0 to 26 bytes: 1 (*)

Data size of message is 27 to 52 bytes: 2

Data size of message is 53 to 78 bytes: 3

Data size of message is 79 to 104 bytes: 4

Data size of message is 105 to 103 bytes: 5

* At headerless packet mode, the value of C is always 1.

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