Wenshing RD-485 User manual

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RD-485 Instruction Manual P.1
WENSHING®© RD-485
868~ 928MHz Wireless Modem Controller System
Version History
Version
Date
Changes
V1.01
Jan.15, 2008
1st.Edition
V1.02
Aug.20,2008
2nd.Edition
V1.03
Oct.27,2008
3rd. Edition
V1.04
Jan.16, 2009
4th Edition
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RD-485 Instruction Manual P.2
Content
Important Event…………………………………………………………………………………………3
Declaration …………………………………………………………………………...………………3
Warranty………………………………………………………………………………………………3
Un-warranty Scope Description……………………………………………………………………3
Contact Us……………………………………………………………………………………………3
Introduce…………………………………………………………………………………………………4
Function Block Diagram………………………………………………………………………………4
Feature Brief……………………………………………………………………………………………5
MCU Processor………………………………………………………………………………………5
RF Circuit……………………………………………………………………………………………5
Memory………………………………………………………………………………………………5
Power Circuit…………………………………………………………………………………………5
Connection Plan………………………………………………………………………………………5
Electric Characteristic…………………………………………………………………………………6
UART Interface Specification…………………………………………………………………………7
LED indicator …………………………………………………………………………………………7
Every Light Function Description……………………………………………………………………7
Power supply indicator ……………………………………………………………………………7
RS232 light (RX / TX)……………………………………………………………………………7
RS485 RX indicator………………………………………………………………………………8
Work light…………………………………………………………………………………………8
Link indicator………………………………………………………………………………………8
Further Description…………………………………………………………………………………8
Set into the model …………………………………………………………………………………8
After set complete………………………………………………………………………8
Link LED lights flashing, Work LED light goes on………………………………………………8
Application………………………………………………………………………………………………9
Example 1 ……………………………………………………………………………………………9
Example 2……………………………………………………………………………………………9
Example 3……………………………………………………………………………………………9
Example 4……………………………………………………………………………………………10
Example 5……………………………………………………………………………………………10
Interface Description …………………………………………………………………………………10
Power………………………………………………………………………………………………10
Serial Interface………………………………………………………………………………………10
Setup Rate and Frequency Mode …………………………………………………………………11
Instruction Format …………………………………………………………………………………11
Following is an example of that value……………………………………………………………11
Command Communication Mode …………………………………………………………………13
General Communication Mode ……………………………………………………………………14
Installation ……………………………………………………………………………………………14
Add to industrial control box aluminum track ……………………………………………………14
Wiring Boost…………………………………………………………………………………………15
Install Antenna ……………………………………………………………………………………15
Connect Power……………………………………………………………………………………16
The Reason of Un-Communication ………………………………………………………………16
The Reason of Communication Wrong……………………………………………………………16
CE Caution Note (European Union) ……………………………………………………………… 17
FCC Line with the Statement ( U.S.A. Only) …………………………………………………… 17
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RD-485 Instruction Manual P.3
Important Event
This product is in general use for the equipment on the premise of the development,
design, manufacture. Do not use that require high security purposes, such as
machinery or medical, aviation equipment, machinery and transport-related deaths
are directly or indirectly related to the system.
This product should be in this brochure by the instructions of the types and rated
voltage power under the current proper use. If violation of this statement by the
safety records of the supply operation, I am afraid our company cannot afford any of
the responsibility.
Do not self-decomposition, alteration, repair of the products also will cause fire,
electric shock, fault, and dangerous. In addition, their decomposition, alteration,
repair the product, failure is not within the scope of warranty.
The products are not waterproof, so please do not use and touch water. Take off and
on also please note. Rain, spray, drinks, steam, sweat may be a failure.
Use of this product, please be sure to use according to the statement recorded by
the use of methods to operate. Please do not violate particular attention to the matter
reminded to use.
Please respect this statement recorded by the note. When consumers in
contravention of this statement recorded note of the operation, I am afraid our
company could not shoulder any responsibility.
Products are defective, the Company will be responsible for free to amend the flaws,
or to the same flawless product or its equivalent products in exchange. However, the
Company does not assume based on the requirements of the flaw and loss
responsibility.
The Company reserves the right to retain without notice to users of the cases, the
product of hardware / software (version upgrade) is with the right to edit.
Declaration
This product provides different frequency for user selection to meet different
telecommunication regulation and FCC/CE on different countries.
Warranty
The warranty time is within one year from purchased date. The warranty scope are
used in normal situation and none vandalism. (Some function harmful out of warranty
scope and Vandalism are Un-warranty).
Un-warranty Scope Description
Because the natural disaster, accident or human factor to cause the bad damage.
Violate the product instruction manual to cause the damage of the products.
The improper assemble causes damage.
The products used the unsanctioned accessory to cause damaged.
Overstep the allowed used environment to cause the products damaged.
Contact Us
WENSHING ELECTRONICS CO., LTD.
No.82, Chong De St. 11054 Shin Yi Dist, Taipei, Taiwan
Tel: [phone]
Fax: [phone]
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RD-485 Instruction Manual P.4
Introduce
RD-485 is for a two-way wireless data transmission products and work for the
868~ 928MHz frequency, mainly to provide wireless half duplex RF transceiver.
RD-485 provide a RS232 (TTL level) and RS485 interface (TTL level), as long
as the user interface in support of the application of internal and RS485 or
RS232 communications, will be the standard serial interface for wireless data
transmission. There are several transfer modes as following:
Broadcasting mode: a transmitter can be connected with all distances in the
launch of the RD-485.
Point-to-point transmission mode: through the instructions set, it will send the
information required to specify the ID on the RD-485.
In this paper, a detailed description of RD-485 wireless two-way RF transceiver
related hardware interface and instructions for use.RD-485 as a complete
collection of RF circuit, particularly suited for wireless products, such as
monitoring, scheduling, data transmission, industrial control, wireless meter
reading system. It can also direct as end products, information transmission,
and the use of a wide range. RD-485 use TRW-V4B-D RF module, application is
more light.
Function Block Diagram
Chart 1 RD-485 function block diagram
RD-485 sets a complete circuit and RF transceiver interface, Figure 1 is for the
RD-485 features diagram. The main components include: MCU processor, RF
circuits, memory, and power and system connector. It can be an external
antenna. Besides, the system connector can connect an external power supply,
serial interface, RS485 interface. In Figure 1, red box for the RD-485 within the
various components of the motherboard, but the red line is for the external
interface. RD-485 motherboard completed a wireless data transmission of all
the features, including RF norms and RF data encryption, such as radio
frequency calibration instructions. There is also: RS232 interface and RS485
interface, LED indicator light. And followings will be briefed on the motherboard
and external interfaces, and other parts of the function.
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RD-485 Instruction Manual P.5
Feature Brief
MCU Processor
MCU processor is to complete all the RD-485 signal processing functions,
including information on the RF transceiver; LED light's instructions, the key
judgment, RS232/RS485 data processing.
RF Circuit
Radio frequency circuit is to provide a 868~928 MHz transceiver channels,
including the reception circuit, firing circuit, Synthesis circuit.
Memory
Main memory used is to store the current operating frequency and RF
transmission rate.
Power Circuit
It can be AC or DC input.
Connection Plan
Indication Position
Item
Description
1
AC/DC Input
Outer Power Input
2
RS232
RS232（TTL Level）
3
RS485
RS485（CMOS Level）
4
Antenna
Antenna input position
5
Settings Button
Within the parameters of Laws
6
Track
Put into the alum. Track position
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RD-485 Instruction Manual P.6
Electric Characteristic
Item
Specification
Remark
Voltage Range
AC：9~30V ; DC：8V~28V
Frequency Range
868~928MHz
Output Power
10mW
Antenna
1/4λ wire antenna
Gain of 2.14 dBi or less
Antenna Power
Within 8 (+20%~-50%)
Contact (50 Ω)
Modulation System
Binary FSK
Oscillation System
PLL synthesizer system
Radio Communication
Speed
1200~250K bps
Number of Channels
4800
Channel span 12.5KHz
Receiver Sensitivity
-112dBm(1200bps)
Packet error rate 1%
(253 bytes/1 packet)
Working Temperature
-10°C ~+70°C
Storage Temperature
-30°C ~+95°C
Consumption Current
31mA I/O Port Open
5mA I/O Port Close
Sleep Mode
(Operating Voltage 15V)
Consumption Current
51mA I/O Port Open
25mA I/O Port Close
Standby Mode
(Operating Voltage 15V)
Consumption Current
55mA
RF Operating Mode
(Operating Voltage 15V)
Weight
140g
Interface
RS232/RS485
UART Interface Specification
Item
Specification
Communication
Method
Serial communication (RS232 C format)
Synchronization
Start-stop (asynchronous)
Data Speed
1,2K/ 2,4K/ 4,8K/ 9,6K/ 19,2K/ 38,4K/ 56K/115.2Kbps
Other Parameters
Data length 8 bits, no parity, stop bits 1 or 2
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RD-485 Instruction Manual P.7
LED Indicator
Every Light Function Description
Power
When the light turn on the power and it is representative of electricity.
RS232 light (RX/TX):
RX indicator light will extinguish 1 time when RS232 received data; TX
indicator light will flash 1 time when RS232 or RS485 transmitted data.
RS485 RX indicator:
When RS485 receipt of data, RS485 RX indicator will light that flashes for 1
time.
Work light:
It will keep flash during normal work.
It will not flash during data sending or data receiving in the process.
It will keep flash after finished whole works. (if message is wrong, it will flash
for 3 seconds.)
Link indicator:
If received data during normal status, Link LED lights will be bright for 30
seconds.
RS232
port
RS485
port
RS232 Indicator Light（RX /TX）
Power Indicator Light
Link Indicator Light
Work Indicator Light
Power in 8V~28V
RS485 RX Indicator Light
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RD-485 Instruction Manual P.8
Further Description
Set into the model: Link LED lights extinguished, Work LED lights will be
flashing.
After set complete: Link LED and Work LED lights will be flashing alternately
for 5 times.
Link LED lights flashing, Work LED light goes on: a representative of the
frequency effect is working now.
Work LED turn on
Link LED turn off
Link LED and Work LED will
ordinate flashes 5 times.
Work LED goes on
Link LED flash
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RD-485 Instruction Manual P.9
Application
Example 1
Computer through the RS232 interface link to RD-485, can be small and
remote data transmission network functions.
Example 2
Computer and industrial control through RS232/RS485 interface link to
RD-485, and it can be remote-control and data monitoring functions.
Example 3
Industrial control through RS232/RS485 interface and link to RD-485, it can
be remote data transmission and monitoring functions.
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RD-485 Instruction Manual P.10
Example 4
Industrial control me through RS232/RS485 interface and link to RD-485, it
can be remote controlled industrial control equipment.
Example 5
Access control management system through the RS232/RS485 interface
also link to RD-485.
Collocate with the our TX-800 remote controller, you can set distance which
you want.
When remote controller close to the distance, it can be with RD-485 to
identify the access control authority.
Interface Description
Power
RD-485 can be used AC/DC on supply power. The voltage is 9V~28V. In
order to guarantee the module is working normally, the DC power should
have the output ability for 100mA peak current.
Serial Interface
RD-485 provides a standard RS232/RS485 serial interface, users can be
through serial interface to send and receive information. Please refer to
specific interface connection on P.5 system connection.
Use the switch on back of the RD-485 for 1,2,3,4 (ON allocated to 1) to
select the transmission rate of the number and choice RS232 or RS485
interface. Please see Table 1.
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RD-485 Instruction Manual P.11
Means for
switching 4
Means for
switching 3
Means for
switching 2
Means for
switching 1
Rate
Interface
0
0
0
0
1.2Kbps
RS232
0
0
0
1
2.4Kbps
RS232
0
0
1
0
4.8Kbps
RS232
0
0
1
1
9.6Kbps
RS232
0
1
0
0
19.2Kbps
RS232
0
1
0
1
38.4Kbps
RS232
0
1
1
0
56Kbps
RS232
0
1
1
1
115.2Kbps
RS232
1
0
0
0
1.2Kbps
RS485
1
0
0
1
2.4Kbps
RS485
1
0
1
0
4.8Kbps
RS485
1
0
1
1
9.6Kbps
RS485
1
1
0
0
19.2Kbps
RS485
1
1
0
1
38.4Kbps
RS485
1
1
1
0
56Kbps
RS485
1
1
1
1
115.2Kbps
RS485
Table 1.
Setup Rate and Frequency Mode
Press the set button (SETUP KEY), RD-485 entry into set mode. Work LED
lights flash, Link LED lights-out, and then PC or micro-controller may be RS485
or RS232 interface under instructions to amend RD-485 wireless transmission
frequency and wireless transmission rate. After RD-485 settings will be
automatically deposited, it will return to have completed at the same data, and
return of a PC or microcontrollers at finally.
Instruction Format
Frequency and wireless transmission rate of 0XABCDEFGHIJKLMNOP
written instructions were 8 bytes with 16-band. If it is more than 8 bytes, less
than 8 bytes or before the 2 bytes is not equivalent to 0x1234, the RD-485 are
disregarded.
ABCD is fixed leader orders for its information "1234 H".
E is fixed at 0 H.
F is for the wireless transmission rate settings.
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RD-485 Instruction Manual P.12
Value
0
1
2
3
4
5
6
7
8
Speed
(bps)
1200
2400
4800
9600
19.2K
38.4K
76.8K
100K
250K
Remark: Wireless transmitted speed is lower, distance is more far and
default rate is 9600bps.
GHIJKL is wireless transmission frequency settings; each is based to 10KHz.
For example, 868MHz = 015310H
922.56MHz = 016860H (default rate is 925MHz)
MN is for the RD-485 of the ID number (default rate is of 0 x00).
OP is constant transmitting packet length (default rate is 0x00).If OP=00 is
not constant length of packet, suggest to set 00H.
Following is Value Example
RF transmission rate of 19.2Kbps
Operating frequency is: 868.00MHz,
RD-485 ID code is 10, doesn’t fix packet length.
BIT47
BIT46
BIT45
BIT44
BIT43
BIT42
BIT41
BIT40
0
0
0
1
0
0
1
0
Location information instructions A
(fixed leader script)
Location information instructions B
(fixed leader script)
BIT39
BIT38
BIT37
BIT36
BIT35
BIT34
BIT33
BIT32
0
0
1
1
0
1
0
0
Location information instructions C
(fixed leader script)
Location information instructions D
(fixed leader script)
BIT31
BIT30
BIT29
BIT28
BIT27
BIT26
BIT25
BIT24
0
0
0
0
0
1
0
0
E location information directive
Directive location information F
(wireless transmission rate set)
BIT23
BIT22
BIT21
BIT20
BIT19
BIT18
BIT17
BIT16
0
0
0
0
0
0
0
1
Directive location information G
(frequency settings)
Command position information H
(frequency settings)
BIT15
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
BIT8
0
1
0
1
0
0
1
1
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RD-485 Instruction Manual P.13
Directive location information I
(frequency settings)
Directive location information J
(frequency settings)
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
0
0
0
1
0
0
0
0
Directive location information K
(frequency settings)
Directive location information L
(frequency settings)
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
0
0
0
0
1
0
1
0
Directive location information M
(RD-485 ID)
Directive location information N
(RD-485 ID)
0
0
0
0
0
0
0
0
Directive location information O
(packet length)
Directive location information P
(packet length)
Command Communication Mode
Read equipment parameters of command:
Send value = 0x1234567868ACFD
Return value= 03 01 69 54 02 00
03=wireless transmission rate (9600 Kbps), 01 69 54= equipment frequency
(925 MHz), 02 = equipment ID code (2), 00= Un-constant pack length.
Read RSSI parameters of command:
Send value = 0 x1234567868ACFE
Return value = BC
BC = RSSI value
Sleep Mode parameters of command:
Send value = 0 x1234567868ACFF
After the equipment sent immediately into Sleep Mode as long as the serial
received information will be automatically wake-up equipment into Standby
Mode.
Point-to-point transmission mode parameters of command:
Send value = 0 x1234567868AC0000SSTTDDDDDDDDD
SS is on behalf of the RD-485 for the ID number,
TT is on behalf of the ID number of receiver.
DDDD is on behalf of data (not set this mode, RD-485 are broadcasting
operation.)
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RD-485 Instruction Manual P.14
General Communication Mode
Choice RS485 or RS232 ports to be information communication.
Allocate to 4 Switch "ON" state, and it is the choice of RS485 port or choose
RS232 ports only.
The port set up a total of eight kinds of work rate option, please refer to P.11
Table 1.In normal working condition, it changes its means for switching the
location, RD-485 will automatically update the rate set port.
Connect the power cord and a good port and power lines.
Press the button set into the mode of all groups within the RD-485 RF work
rate and the frequency set to work, otherwise it will not be able to send
information.
After re-electricity, RD-485 will automatically call the last set of work rate and
frequency, as the current work rate and frequency.
Through the port to send data to the RD-485, its members only in the
receiving group within the scope of its information can be received and
transmitted through its port user group.
Installation
Add to Industrial Control Box Aluminum Track
Step 1
Step 2
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RD-485 Instruction Manual P.15
Wiring Boost
Install Antenna
Standard Antenna
Sucker Antenna
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RD-485 Instruction Manual P.16
Connect Power
The Reason of Communication Failure
Work LED is not bright, said the appliance or DSP processor is in question.
Work LED is bright, please re-set the work rate and RF frequency. After set
the completion, please inspect Link LED Work LED will alternately flashing
lights or not. If is not flashing, it said port communication has problems.
The Reason of Communication wrong
Q: Whether RD-485 can send the information over 253bytes?
A: RD-485 does not allow information over 253bytes to send a maximum of 251
bytes.
Q: Whether or not the information at the first time with information on the second
intermediate waiting for the short time interval at 8ms, and the high rate of a
few interface, the wireless transmission rate set is too lower?
A: Solution: give time to wait for longer and fixed length of 251 bytes packet sent
as an example interval up to 50ms.
Q: When I connect PLC, it can communication each other, but PC can
communication to PC. Would you please let me know what’s happen?
A: When you set link on PLC, you need to set Parity on None, also, you must to
check Com Port of PLC support Parity is None.
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RD-485 Instruction Manual P.17
CE Caution Note (European Union)
Symbol of it accords with EMC regulation (89/336 / EEC) to represent this
device, and the low-voltage regulation of European Union (73/23/EEC). It
represents to follow the following standard regulations of European Union (The
bracket is a reciprocal international standard reciprocal international standard
and regulation).
EN 60950/A11: 1997/(IEC 60950/A4: 1996),The ones that includes
information science and technology of apparatus of e-commerce safe.
EN 55024: 1998 (IEC 1000-4-2, 1000-4-3, 1000-4-4, 1000-4-5, 1000-4-6,
1000-4-8, 1000-4-11) -' scientific and technological apparatus of information -
The characteristic of interfere avoided - Restrain and test method '
Chapter 2 -Static release (ESD) Demand
Chapter 3 -Radiate the static field demand
Chapter 4 -The electron is transmitted / produced and washed (EFT) fast
Demand.
Chapter 5 -surge demand
Chapter 6 -Resistance demand caused in field of wireless frequency.
Chapter 8 -Magnetic field demand of electric frequency.
Chapter 11 –Shortly cut off the demand of making a variation with the voltage
transiently under the voltage.
EN 55022:1998/(CISPR 22:1997) ,Class B, ' “To assess information scientific
and technological apparatus wireless restriction and way of interfering with the
characteristic.”
FCC Consistent Declaration ( U.S.A. Only)
Attention: FCC rule regulation, modified and changed must allowed by
WENSHING Electronics company, otherwise that would make you operate this
apparatus invalid. This apparatus adopted test, according to chapter 15 that
FCC regulation, accord with Class B digital restrictions of device. These limits
are designed to provide reasonable protection, avoid to having harmful
interference at home’s environment.
This device may have radiated wireless frequency energy. If don’t allow the
instruction manual, then may will interfere wireless communication. However,
there is no any way to guarantee, it will not be interfered in particular installed. If
this device really causes harmful interference, (It could be confirmed by turning
on or off this device.) Advise you to try to use the following ways modifying the
interference situation.
Relocation receiving antenna or altering its direction.
Increase the distance between device and receiver.
Please connect this device to the outlet in the circuit different from the
receiver.
The following manuals is published by Federal Communications Commission,
they must be helpful to all users.
How to Identify and Resolve Radio-TV Interference Problems. (This manual
can be obtained by relevant departments of publication of the U.S.
government.)
Government Printing Office, Washington D.C., 20402. Stock No. 004-00398-5
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