Futaba FDP03 User's Manual

WIRELESS DATA COMM UNICATI ON MODEM

FDP03TJ010/020

2.4GHz Embedded Type Wireless Modem

Instruction Manual

Futaba Corporation

Industrial Radio Control

I

Ver.1.0

I Notice

This device complies with part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at her/his own expense.

Any unauthorized changes or modifications to this device not expressly approved by Futaba
Corporation could void the user’s authority to operate the device and possibly result in
damage to the equipment and/or cause serious or fatal injuries to the operator or nearby
personnel.

This device is intended to be installed and used in accordance with the instructions contained
in this manual. Failure to comply with these instructions could void the user’s authority to
operate the device and possibly result in damage to the equipment 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 this section contain important information that
will help ensure safe operation of the system. Please read carefully and understand all of
these items. All installers, operators and maintenance personnel should read and understand
this information before installation, use, or maintenance of the FDP03TJ010/020.

The FDP03TJ010/020 system by itself is not inherently dangerous. HOWEVER, WHEN

THE FDP03TJ010/020 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 FDP03TJ010/020 may be used in virtually unlimited applications. Many of these
associated systems can, by themselves, pose a mechanical, electrical or other hazard to
operators and other persons or equipment. To address all possible applications and
associated safety hazards in this manual would be impossible. The warnings below and
throughout this manual give information that will allow safe installation and use the modem
system applications. If you have questions regarding the safety of your specific application,
please contact the appropriate people for help. Your Futaba sales representative,
representatives of the equipment being controlled, and the technical support staff at local
branch of Futaba Corporation are among those who can provide assistance with your safety
concerns.

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

In installations where the FDP03TJ010/020 is used to control motion or operation of
potentially dangerous equipment, it is imperative for safety that all operators and installers be
thoroughly trained in the normal function of that equipment before attempting to control it
remotely with the FDP03TJ010/020.

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Ver.1.0

To help ensure safe operation of the equipment, the FDP03TJ010/020 must be connected so
that it will operate in a fail-safe way. In other words, the equipment being controlled
should stop or return to its safest state in the absence of a control signal or total loss of RF
transmission from the FDP03TJ010/020. Our system uses one of the most reliable methods
available to transmit data using radio signals. Many factors can affect a radio signal that
may block it or interfere enough to disrupt regular transmission. Because of this,
equipment motion or dangerous electrical current, for example, that continues during a
loss-of-signal condition could be very dangerous.

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Ver.1.0

Four symbols are used in the margin of the following section and throughout the manual 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 or can cause minor personal injury, or
property damage if the warning is ignored.

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

Please read the following safety information carefully. Some of these notices 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 FDP03TJ010/020 can
cause serious or fatal injuries to the operator or nearby persons and
cause damage to the FDP03TJ010/020, 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 manual at a location readily accessible to anyone
operating the system and related equipment. Ensure that all operators
have read and understood this manual, especially all safety and
operation procedures contained in it. Please refer to the section in this
manual titled How to Obtain Help for the contact that can supply
additional manuals or answers to questions not covered in this manual.
If this product is passed on to a different user, be sure that this manual
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 FDP03TJ010/020 should NOT be used in a manner in which
failure of the product or loss of the radio signal could cause damage to
the equipment being controlled, or to anything in the area in which
such equipment is located. All integrated control systems should be
designed for “fail-safe” operation so that a temporary or permanent loss
of signal will not endanger any person, critical process, or equipment
(refer to the beginning of the safety section for further explanation).
The system design should ensure that the equipment being controlled
will initial to its safest state in the event of signal loss.

The FDP03TJ010/020 contains no user serviceable parts. If the unit
requires service, contact your sales representative or local branch of

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Ver.1.0

Futaba Corporation per instructions the section titled How To Obtain
Help. Do not disassemble or attempt to repair the FDP03TJ010/020

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

Contact Futaba before using the FDP03TJ010/020 in safety critical
applications such as medical equipment, aircraft, hazardous materials
handling, etc.

II.II Installation Safety Hazards and Notes

Use only the proper regulated DC voltage supplied to the
FDP03TJ010/020. Use of any other voltage may permanently damage
the modem 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 shock hazard
may exist if this unit is powered by a faulty power outlet or source.
If such a situation is discovered, 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 connections correctly. Incorrect wiring can
damage the system, cause it to malfunction and/or create a shock and
fire hazard.

Ensure that the FDP03TJ010/020 power and the power to the
equipment to be controlled are turned off before 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 FDP03TJ010 power, the power to the equipment that is
being connecting to it, and the DC power source are all turned off
before wiring and connecting the power cable.

Be sure that the supplied power is within the specified range.
Voltages outside the specified range may damage the
FDP03TJ010/020.

Be sure that the power source has sufficient current capacity.
Insufficient current may cause the unit to malfunction.

Securely attach the antenna cable to the FDP03TJ010/020 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
FDP03TJ010/020 is embeded into any products.

“This device contains FCC ID:AZP-FDP03”

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Ver.1.0

Antenna Installation Hazards and Notes

Be sure to keep all systems and antennas clear of power lines.
Permanent equipment damage and severe shock injury or death can
occur if the system contacts power lines.

Contact Futaba before connecting any antenna not provided by Futaba
specifically for the FDP03TJ010/020. Attaching any non-authorized
antenna may be in violation of FCC regulations.

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

The FDP03TJ010/020 operates at frequencies in the 2.4 GHz band.
These frequencies are more directional than lower frequencies and are
easily reflected. If there are metal structures nearby, the effective
range may be shortened or the directional properties may be further
narrowed. To help avoid this, mount the antenna as far away as
possible from surrounding metallic structures.

Multipath problems occur easily at frequencies in the 2.4 GHz band.
When multipath problems are present, moving the antenna around 10
cm may result in improved communication or, conversely, worsened or
complete loss of communication. Futaba recommends that the
mounting position of the antenna be determined after testing and
verifying optimal communication conditions.

When installing multiple FDP03TJ010/020 that will use different
frequency groups in the same area, FDP03TJ010/020’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 information about antenna separation when
using the FDP03TJ010/020 and other wireless products in the same
area.

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Ver.1.0

II.III Environmental Safety Hazards and Notes

If the FDP03TJ010/020 has been stored at a temperature beyond the
specified operating temperature range for the system, it may not
function properly. Allow it to return to normal temperatures before
use. Refer to APPENDIX A – TECHNICAL SPECIFICATIONS for the
actual operating temperature range.

The FDP03TJ010/020 is a precision electronic device with a rugged
design that is intended for industrial applications. However, do not
install it where it will encounter excessive vibrations. In some cases,
isolation mounts may be used to isolate the modem from the
equipment’s vibration. Excessive vibration can permanently damage
the modem and/or cause it to malfunction.

Do not operate the FDP03TJ010/020 in environments where it will be
subjected to excessive moisture (such as rain or water spray), dust, oil,
or other foreign matter (such as metal particles). Doing so may
permanently damage the modem and/or cause it to malfunction. If it
does become wet or contaminated, correct the situation, verify proper
operation and have any problems corrected before using it to control
other equipment. If necessary, the modem can be mounted inside a
protective or waterproof enclosure. If the enclosure is metallic, the
antenna must be mounted externally or the effective operating range
will be severely limited.

The FDP03TJ010/020 is designed for indoor use. When using it
outdoors, the modem should be mounted in a waterproof enclosure and
the ambient temperature range should be checked to insure that it is
within the modem’s specifications. Always use the modem within its
specified environmental ranges.

II.IV Other Notice

Italicized gothic word used in this manual shows functional and
technical term especially important for the FDP03TJ010/020.

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Ver.1.0

Operational Safety Hazards and Notes

Before each use of the FDP03TJ010/020, ensure that the area where the
equipment will be operated is clear of people or obstacles that may
affect its safe operation.

Before each use of the FDP03TJ010/020, verify that both the
equipment being controlled and the modem are in proper operating
condition.

When rewriting the FDP03TJ010/020’s memory registers, do not turn
the modem’s power off. If the power is interrupted, the memory
contents may be lost or corrupted and the modem operation will be
unpredictable. If the memory contents are lost or corrupted, they may
be restored to original initial settings by reinitializing them.

Do not attempt to operate remotely controlled equipment outside the
communication range of the FDP03TJ010/020. 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 FDP03TJ010/020 ever need repair or
replacement.

Model Name and Number: FDP03TJ010/020

Serial Number:

Date of Purchase:

Distributor Name:

Distributor Address:

Distributor Phone Number:

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Ver.1.0

IV Limited Warranty

FUTABA WARRANTS ONLY THAT THE INDUSTRIAL RADIO CONTROL SYSTEM
GOODS OR PRODUCTS FURNISHED HEREWITH SHALL BE FREE FROM DEFECTS
IN MATERIAL AND WORKMANSHIP UNDER NORMAL CONDITIONS OF USE AND
SERVICE FOR A PERIOD OF ONE (1) YEAR FROM THE DATE OF SALE TO THE
PURCHASER WHO IS THE FIRST BUYER OF THE GOODS FOR USE OR
CONSUMPTION AND NOT FOR RESALE OTHER THAN AS A COMPONENT OF
ANOTHER PRODUCT MANUFACTURED FOR SALE BY SUCH PURCHASER
(“CONSUMER”). FUTABA’S LIABILITY, WHETHER BASED ON BREACH OF
WARRANTY OR NEGLIGENCE, SHALL BE LIMITED, AT FUTABA’S ELECTION, TO
REPLACEMENT OR REPAIR OF ANY SUCH NONCONFORMING GOODS, F.O.B.
FUTABA’S U.S.A. 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 PRIOR TO ANY RETURN OF GOODS TO INSPECT ANY GOODS CLAIMED
TO BE NONCONFORMING, AND IN ANY EVENT RESERVES THE RIGHT TO
REJECT CLAIMS NOT COVERED BY WARRANTY. THIS LIMITED WARRANTY
CONSTITUTES FUTABA’S SOLE WARRANTY. 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 CONTAINED HEREIN OR FURNISHED WITH THE
PRODUCT, BUYER, OR CONSUMER, OR ANY USER OF THE PRODUCT (A)
ALTERS SUCH PRODUCT, OR (B) REPLACES ANY PART OF SUCH PRODUCT WITH
ANY PART OR PARTS NOT FURNISHED BY FUTABA FOR THAT PURPOSE, OR IF,
AMONG SUCH OTHER LIMITATIONS, PRODUCT FAILS TO OPERATE PROPERLY
OR IS DAMAGED DUE TO ATTACHMENTS OR COMPONENTS THAT ARE NOT
FURNISHED BY FUTABA FOR USE WITH OR REPAIR OF THE PRODUCT UNLESS
SUCH USE IS AUTHORIZED IN WRITING IN ADVANCE BY FUTABA.

THIS LIMITED WARRANTY EXTENDS ONLY TO THE CONSUMER AND IS NOT
ASSIGNABLE OR TRANSFERABLE. This limited warranty shall not apply to fuses,
lamps, batteries, or other items that are expendable by nature, unless otherwise expressly
provided.

This limited warranty does not cover any defect or damage to any of the goods caused by or
attributable to force, accident, misuse, abuse, faulty installation, improper maintenance,
improper electrical current, failure to install or operate in accordance with Futaba’s written
instructions, repair or alteration by unauthorized persons, 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.1.0

V Returns

Futaba’s authorization must be obtained prior to return of any item for warranty or other
repair or replacement or credit and will reflect Futaba’s warranty service procedure.
Consumer’s warranty rights are governed by the terms of Futaba’s Limited Warranty, as
above described. Products returned for warranty repair or replacement or credit must 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 the bill of sale or invoice which
shows the date of sale and the original Buyer’s and Consumer’s names, and also a letter
which gives the Consumer’s return address and contact telephone number, the model and
serial numbers of the product(s) returned, and a brief explanation of the problem or claimed
defect. Any returned products that are replaced by Futaba shall become the property of
Futaba. If after inspection Futaba determines the defect is not covered by its limited
warranty, Futaba will notify Consumer of its determination and will not undertake any repairs
or product replacement until Consumer agrees to pay for all necessary parts and materials,
labor (to be charged at Futaba’s standard repair rate then in effect), and other expenses
including all shipping charges and insurance. Futaba reserves the right to retain possession
of any product returned by Consumer because of defects not covered by Futaba’s warranty
until Futaba receives Consumer’s agreement as above noted or, if Consumer wants the
product returned without repair or replacement, Consumer reimburses Futaba for all shipping
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 must inspect goods immediately and no rejection or revocation of
acceptance shall be permitted more 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 manufactured according to designs or processes specified by Consumer,
Consumer shall indemnify and save Futaba, its affiliates, officers, agents, and employees,
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 commenced within one (1)

year of accrual of cause of action or be barred and forever waived. No modification or
alteration of Futaba’s Limited Warranty or any other provision of this paragraph or the above
paragraphs shall result from Futaba’s acknowledgment of any purchase order, shipment of
goods, or other affirmative action by Futaba toward performance following receipt of any
purchase order, shipping order, or other form containing provisions, terms, or conditions in
addition to or in conflict or inconsistent with any such provisions.

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Contents

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

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

2.1 Packet Transmission Mode.....................................................................................................................1

2.2 Headerless Packet Transmission Mode..................................................................................................4

2.3 Serial-Output Data Format of Receiver Side at The Transmission Mode..............................................5

2.4 Broadcast Transmission Mode...............................................................................................................6

3. Data Transfer............................................................................................................................................7

3.1. Data Transfer Mode..................................................................................................................................7

FDP03 has 2 kinds of data transfer mode. One is “Interchange” mode that is possible to exchange data
between other FDP series. Another is “Communication Distance Extend” mode. The initial setting is

“Interchange” mode.........................................................................................................................................7

The data transfer mode should be same setting among communication partners. If the mode is different

each other, it is impossible to communicate with............................................................................................7

3.2. Setting.......................................................................................................................................................7

3.2.1. Setting by the memory register .......................................................................................................7

The data transfer mode can be changed by the bit 5 of the REG10. The initial setting of the bit 5 is “0”.

It means that “Interchange” mode. For more detail, please check Section 8. ..............................................7

3.2.2. Setting by command........................................................................................................................7

The data transfer mode can also be changed by SPD command. For more detail, please check Section 9.3.
7

3.3. Difference of 2 modes..............................................................................................................................7

Interchange Mode............................................................................................................................................7

It is possible to communicate between other FDP series such as FDP01 and FDP02.....................................7

Communication Distance Extend Mode..........................................................................................................7

Wireless communication distance is extended to twice as long as “Interchange” mode.................................7

4. Transmission Timing................................................................................................................................8

4.1 Transmission Timing..............................................................................................................................8

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

mode....................................................................................................................................................12

5. Low Power Stand-by Mode....................................................................................................................13

This mode realizes low power consumption drive by switching ON and Off of RF circuit. It is possible to
set this low power stand-by mode by the memory register (REG21: bit 2) or the command. If this mode is

set by the command, this mode is released by the main power OFF or by set to power down mode...........13

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

Setting.................................................................................................................................................13

5.2.

5.2.1. Setting by the memory register........................................................................................................13

5.2.2. Setting by the command..................................................................................................................14

6. RF Circuit Power Control Mode ............................................................................................................15

6.1. Operation Flow ...................................................................................................................................15

8. Registers.................................................................................................................................................17

8.1. List of Registers ..................................................................................................................................17

8.2 Explanation of Registers ......................................................................................................................18

9. Frequency...............................................................................................................................................27

9.1 Frequency Range..................................................................................................................................27

9.2 Frequency Setting and Frequency Group.............................................................................................28

9.3 Commands............................................................................................................................................29

9.3.1 List of commands..............................................................................................................................29

9.3.2 Command input format .....................................................................................................................29

9.3.3 Explanation of commands.................................................................................................................30

10. Interface................................................................................................................................................47

10.1. Pin Layout .........................................................................................................................................47

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Ver.1.0

10.2. Recommended Connector .................................................................................................................47

10.3. Electrical Characteristics...................................................................................................................48

10.4. AC Characteristics.............................................................................................................................48

10.4.2 Low Power Stand-by Mode.............................................................................................................49

10.5.3. RF Circuit Power Control Mode......................................................................................................50

10.5.4. Power Down Mode........................................................................................................................51

10.5.5. Parameter Initializing by /SHUT and /INI Terminal .......................................................................52

11.1. Outer Dimensions..............................................................................................................................53

11.2. Weight ...............................................................................................................................................53

11.3. Power Supply ....................................................................................................................................53

11.4. Radio Specifications..........................................................................................................................54

10.5 Interface..............................................................................................................................................54

10.6 Environment.......................................................................................................................................54

11. Notes.....................................................................................................................................................55

11.1 Data Communication Delay ...............................................................................................................55

11.1.1 Delay at the transmission side.........................................................................................................55

11.1.2 Delay at the reception side ..............................................................................................................55

11.2 Reception of Same Packets ................................................................................................................55

11.3 Timing of Command Input.................................................................................................................55

11.4 Headerless Packet Transmission Mode ..............................................................................................56

11.4.1 Input data.........................................................................................................................................56

11.4.2 Measures against packet loss...........................................................................................................56

11.5 Occurrence of Data Loss Even under Hardware Flow Control..........................................................56

11.6 Frequency Setting in Multi-System Environment..............................................................................56

11.7 Timing of Command Input.................................................................................................................56

11.8 INI and RST Commands ....................................................................................................................56

11.9 Power-Down Mode ............................................................................................................................56

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Ver.1.0

1. Overview

The FDP03TJ010/020 (hereinafter referred to as the "FDP03") is a 2.4GHz-band wireless radio modem with a
compact and low power consumption design. FDP03TJ010 should be connected to an external antenna by an
antenna connector. FDP03TJ020 equips built-in antenna

Do NOT place FDP03TJ020 near any metal objects. Because
FDP03TJ020 uses built-in antenna, RF radio will be blocked and will
have unnecessary reflections if it is placed near metal objects.

Communication distance of FDP03TJ020 will be dramatically changed
by the surrounding environment.

.

2. Operating Modes

The FDP03 has the following three transmission modes:

- Packet transmission mode

- Headerless packet transmission mode

- Broadcast transmission mode

2.1 Packet Transmission Mode

The FDP03 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>

Destination

address

Data (message) Delimiter

(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

Destination

address

Number of

data bytes

Data (message) Delimiter

data

defined

<Cr><Lf>

User-specified

Processing of packet transmission and reception

When a packet is input to a sender FDP03 via the serial port, the sender FDP03 checks whether the packet is
valid.
Then, if the packet configuration is invalid or a time gap between bytes is more than 5 seconds, the sender
FDP03 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 sender FDP03 replies a P1 response to the host when it receives a valid packet data. However, the
sender FDP03 does not return any response if the functions of the REG13 register is different setting. Then,
the sender FDP03 transmits the packet through wireless transmission to the destination address, receiver
FDP03.
At receiver FDP03 side, it output the packet data through the serial port if configurations of packet are valid.

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Ver.1.0

At that time, the receiver FDP03 responds an acknowledgement “ACK” signal to the sender FDP03 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 FDP03 does not return ACK signal to the sender
FDP03 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 FDP03 receives ACK
signal. At that time, the sender FDP03 outputs P0 response if "Enabling response" functions of the REG13
register is turned on. When the sender FDP03 cannot receive ACK signal within the time-out limit, the
sender FDP03 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 FDP03 receives the same packet several times, it ignores from the second data downward.
Also, the receiver FDP03 sends ACK signal to the sender FDP03 if the function of "Enabling destination
address check at reception" of REG18 register is turned on.
If the sender FDP03 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 communicati on bet wee n a sen der FD P0 3 t hat the
"Enabling response" and "Returning P0 and P1 responses" functions of REG13 register are turned on and a
receiver FDP03 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 FDP03 via the serial port.
② The sender FDP03 recognizes the data packet configuration as valid and returns a P1 response to the Host

1 (Data is accepted).

③ The sender FDP03 transmits the data packet to the destination, which is the receiver FDP03, by wireless

transmission.

④ The receiver FDP03 receives the packet and outputs the received data packet to the Host 2 via the serial

port.

⑤ The receiver FDP03 returns ACK to the sender FDP03 by wireless transmission.
⑥ Time-out is occurred at the sender FDP03 because it cannot receive the receiver's ACK signal at the first

transmission. The sender FDP03 re-sends the data packet transmission.

⑦ The receiver FDP03 receives the same data packet as the previously received one. Thus, the receiver

FDP03 ignores the received data but returns ACK signal to the sender FDP03.

⑧ The sender FDP03 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.

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Ver.1.0

After entering a command to the sender FDP03, do not input the next command
until the P0 response for the entered command is return ed. 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 FDP03 is
turned on, the next command should be input after waiting a time period of
expected P0 response.

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Ver.1.0

2.2 Headerless Packet Transmission Mode

By setting "Headerless packet transmission mode" on the REG03 register of the FDP03, the FDP03 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 150 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 shoul d 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 FDP03.

The serial communication speed of all FDP03 should be same setting. If
different serial communication speeds are set between on
receiver FDP03, 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 transmi ssi on m ode). The below table shows combination of the
data format and the mode setting.

Sender FDP03 (radio address is 000) Receiver FDP03 (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 FDP03 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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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 FDP03 transmits data packet defined times by REG11 register + 1
time. If "Enabling response" function is turned on, the sender FDP03 sends response signal to the host. For
more details, see the section 2.1.
At broadcast transmission mode, the receiver FDP03 does not return ACK signal regardless of the REG18
register setting. Also, when the receiver FDP03 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 FDP03 is turned on.

① Host 1 inputs broadcast data to the sender FDP03.
② The sender FDP03 recognized the data packet configuration is valid and returns a P1 response to the host 1

(data is accepted).

③ The sender FDP03 broadcasts data packet defined times by REG11 register + 1 by air .
④ When the receiver FDP03 receives the packet correctly, it outputs the received data packet to the host 2 via

the serial port.

⑤ When the sender FDP03 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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3. Data Transfer

3.1. Data Transfer Mode

FDP03 has 2 kinds of data transfer mode. One is “Interchange” mode that is
possible to exchange data between other FDP series. Another is “Communication
Distance Extend” mode. The initial setting is “Interchange” mode.

The data transfer mode should be same setting among
communication partners. If the mode is different each other,
it is impossible to communicate with.

3.2. Setting

3.2.1. Setting by the memory register
The data transfer mode can be changed by the bit 5 of the REG10. The initial

setting of the bit 5 is “0”. It means that “Interchange” mode. For more detail, please
check Section 8.

3.2.2. Setting by command
The data transfer mode can also be changed by SPD command. For more detail,

please check Section 9.3.

3.3. Difference of 2 modes

Interchange Mode It is possible to communicate between

other FDP series such as FDP01 and
FDP02.

Communication Distance
Extend Mode

Wireless communication distance is
extended to twice as long as
“Interchange” mode.

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p

p

p

p

4. Transmission Timing

4.1 Transmission Timing

At packet transmission mode, the FDP03 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 FDP03 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 FDP03 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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① Serial input of transmission data packet

The time required to data input between the host1 and the sender FDP03 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 Command 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 Transmission 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 FDP03 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 FDP03 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 Data reception processing
It is the time for the receiving data processing and it takes 2.4 ms.

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