VW320 USER MANUAL （Rev 4.0） VitalWell Electronics Pte. Ltd.
Contents
1. 5 AT V command displays the modem s firmware version number similar as follows MVW4432A 4 V2 0 ATIV B N 20110727 gt AT L command displays a dynamic and clear status of all relevant registers of the modem with the following categories _ Serial link AT L _ Radio Operation Mode _ Network ATSn m ATSn m or ATSn m k command configures register number n with the value m or m k if 2 Bytes e g ATS100 32 lt CR gt enters the value Or 32 in the register S100 ATS120 192 168 enter the value 192 168 in the register S120 The value of m amp k is between 0 255 ATSn m k Answer gt or CR gt if the configuration is not valid VitalWell Electronics Pte Ltd www vital well com 6 ll 4 Registers Description The parameters to be configured via Configuration mode are stored in modem s EEPROWM s registers called S registers Those registers are always listed as follows _ 10x registers correspond to the serial parameters _ 110x registers correspond to the radio parameters _ 12x registers correspond to the general network operation parameters The standard registers and their use are shown in the next table VitalWell Electronics Pte Ltd www vital well com 7 II 4 1 Registers Description Table Access Registers Name Description Indicates the maximum frames size that will be given to the Modem When this size is reached the data2. in the a FIFO will be immediately sent out via RF link If flow RW S100 Serial Link Icontrol is enable a Xoff code will be sent out from the FIFO size modem Value Range 1 50 Default 50 Indicates flow control type _ 0 None default R W S101 Serial Link 1 Software Xon Xoff Flow Control Indicates the value of the time out on the serial link time out counts on bytes lapsed on the current baudrate E g a at serial baudrate 9600bps a value 5 means a 5Sbytes R W S102 Serial Link transmit time on 9600bps that is about 5ms Time Out This is used when the serial FIFO is not full after this time out the data in the FIFO will be sent out via RF link Value Range 3 255 Default 3 Sleep Mode Control 0 Disable Default module always active 1 2 3 Enable R W S103 Sleep Mode Control If S103 1 sleep enabled wakeup active by 104 If S103 2 sleep enabled wakeup active by WOR If S103 3 sleep enabled wakeup active by WOR or 104 And O1 output will be used to indicate the working status 1 01 0 indicate a active status 1 01 1 indicate a power down mode See more details on appendix c Serial Baud Rate Serial 0 1 2 3 4 5 6 7 R W S104 Baud Rate gt 1200bps 2400bps 4800bps 9600bps 19 2kbps 38 4kbps 57 6kbps 115 2kbps VitalWell Electronics Pte Ltd www vital well com 8 Access Registers Name Description Set the speed on the Radio _ 0 12
3. is kept active at least for 0 2s When the external MCU received the 101 low signal and need the board be kept active to complete some task it should pull 104 to low A rising edge on 104 will put the board back to sleep mode and WOR timer will restart if no response from the external MCU after pull 101 to low the board will auto go to sleep mode after 200ms and also the WOR will restart When in sleep mode 101 will be push to high How to wake up a WOR enabled slave The master should set S103 0 Then a falling edge on 104 will trigger a WOR wakeup beacon event The master will continues send out a series beacon time is defined by S116 The value of S116 of master should gt slaves S116 to ensure a successful wakeup VitalWell Electronics Pte Ltd www vital well com 22 D Boot loader notes VW320 is equipped with a boot loader when shipped out from factory It allow the firmware be upgraded after receive the board Users can request to alter the default firmware to suit their special application after receiving the board Depending on the request we Vitalwell will evaluate it and do the changes accordingly The modified firmware will be sent out by email The boot loader is active by keep pin10 to low during power up When boot loader is active the on board LED will flash fast to indicate a ready to receive new firmware state The firmware is send to board via a serial COM connection PC application for the boot
4. 00 Bits s _ 1 2400 Bits s R W S110 Radio Baud _ 2 4800 Bits s Rate _ 3 9600 Bits s Default _ 4 19200 Bits s _ 5 38400 Bits s 6 76800 Bits s _ 7 115200 Bits s _ 8 256000 Bits s VW110A VW2500A only Number of the radio channel in use Radio Range 0 100 R W S111 Channel Default 0 Power of the Radio R W S112 Radio Power For VW4432A 0 1 2 3 4 5 6 7 gt 1dB 2dB 5dB 8dB 11dB 14dB 17dB 20dB RSSI _ 0 hide default R W S115 Value 1 show show hide When set to show when receiving a message the modem will echo the RSSI value of the received message to the host Please refer to the Si4432 datasheet for the RSSI value Vs input power Setting W O R timer when register S103 2 or 3 R W S116 WOR Timer Step is 200ms Exp when S116 10 means the board will auto wakeup every 2s to listen a wakeup beacon signal If no then auto back to sleep mode if yes will pull 101 to low See more details on appendix c VitalWell Electronics Pte Ltd www vital well com 9 Access Registers Name Description Network ID in 2 Bytes R W S120 Network ID E g ATS120 192 168 will set the network ID to 192 168 R W S121 Device ID Device ID Used for Addressed Mode or Addressed Secured Mode Default Default Destination Device ID Used for Addressed Mode on R W S122 Destination Addressed Secured Mode If Destination ID is not provided D
5. 3 ATS111 0 ATS112 3 ATS120 192 168 ATS121 10 ATS122 200 ATS123 127 ATS124 2 ATS125 3 ATS126 3 ATS127 0 lt Client 1 gt ATS100 60 ATS101 1 ATS120 192 168 you can turn off Xon Xoff by ATS101 0 device ID server ID 10 default destination id dummy for server Addressed Mode client address at the header for server you can turn off Xon Xoff by ATS101 0 ATS121 1 device ID client id 1 ATS122 10 default destination id the server ID ATSI 24 2 Addressed Mode ATS1 26 0 no address at the header default to from server for client ATS127 0 lt Client 2 gt ATS100 60 ATS101 1 ATS120 192 168 you can turn off Xon Xoff by ATS101 0 ATS121 2 device ID client id 2 ATS122 10 default destination id the server ID ATSI 24 2 Addressed Mode ATS1 26 0 no address at the header default to from server for client ATS127 0 On server 1 Hello sends the data frame Hello to Client 1 2 Hello sends the data frame Hello to Client 2 On each client Hello sends the data frame Hello to server ID 10 VitalWell Electronics Pte Ltd www vital well com 20 B 6 A typical Hyper terminal setting Xon Xoff enable COM4 Properties Port Settings Bits per second v Data bits Parity Stop bits Flow control Xon Xoff TCOM4 Properties Connect To Settings Function arrow and ctrl keys
6. Installation Principles and cautions B Register setting tips and examples B 1 Configuration list file B 2 Turn on Software flow control Xon Xoff B 3 Changing Operation Mode B 4 A typical point point configuration using Addressed Mode B 5 A typical Server Client configuration using Addressed Mode B 6 A typical Hyper terminal setting Xon Xoff enable VitalWell Electronics Pte Ltd Tel 86 0756 3867295 Block D3 415 416 Southern Software Park TangJia ZhuHai China 519080 vital well com CHAPTER I ELECTRICAL SPECIFICATION 1 1 General Specifications 1 Supply Voltage 5V or 3 3V 410 2 Supply Current lt 120mA 3 Voltage level at I O 3 3V TTL 5V_ compatible 4 Serial Interface Characteristics RS232 i Baudrate 9600 8N1 Default 5 RF Characteristics i Frequency band ISM 433 868 915MHz ii Channels 100 iii RF rate 1 2kbps 2 4kbpa 4 8kbps 9 6kbps 19 2kps 38 4kbps 76 8kbps 115 2kbps iv Max RF transmitter power 20dB 100mW v Sensitivity 121dB 1 2kbps 108dB 38 4kbps vi Typical link range outdoor gt 1000m 9600bps 6 Ready to Tx Rx after power on reset 150ms max 1 2 Dimension 1 LXWXH 41mm X 23mm X 5mm PCB assembly exclude connector 2 Interface 10pin 2 0mm header 1 3 Interface Specifications Interface 232 TTL The signal voltage level of VW320 is 3 3V TTL level at the interface with 5V compatible 1 Signal Definitions 1 G
7. ND 6 101 board ready 2 VCC 5V 7 102 3 RXD RS232 TTL 8 103 4 TXD RS232 TTL 9 104 Sleep WOR Ctl 5 IO0 RS485 T R 10 Boot loader EN VitalWell Electronics Pte Ltd www vital well com l 2 Typical Connections connections at Pin1 4 only 1 GND 2 5V LDO 4 TXD VitalWell Electronics Pte Ltd www vital well com 2 CHAPTER II CONFIGURATION MODE This section describes the configuration and test commands supported by the radio modem In most cases once the configuration is set it will not need to be changed Configuration is performed using a serial terminal or appropriate communication application All commands and command values accepted by the radio modem are described in this section any entries other than those listed here results in an invalid command or argument error message The first step to configuring the Radio Modem is to put it in Configuration Mode ll 1 Entering Configuration Mode A series of three consecutively typed characters called an escape sequence forces the radio modem to exit data transfer mode and enter the modem configuration mode While in Configuration Mode you can communicate directly with the radio modem using a number of specific commands to configure and test the radio modem The escape sequence is factory set to No carriage return key is followed A pause length of which is called the escape guard time about 1s must be completed both befo
8. VW320 USER MANUAL Rev 4 0 VitalWell Electronics Pte Ltd VitalWell Electronics Pte Ltd Tel 86 0756 3867295 Block D3 415 416 Southern Software Park TangJia ZhuHai China 519080 vital well com Proprietary Notice Copyright VitalWell Electronics Pte Ltd 2011 The information in this document is subject to change without notice Company or product names mentioned in this document may be trademarks or registered trademarks of their respective companies All rights reserved Neither the whole nor any part of the information contained in this publication may be reproduced in any material form except with the written permission of VitalWell Electronics Pte Ltd This publication is intended only to assist the reader in the use of the product VitalWell Electronics Pte Ltd shall not be liable for any loss or damage arising from the use of any information in this publication or any error or omission in such information or any incorrect use of the product Technical Support Documentation is updated periodically For the latest information about VitalWell Electronics Pte Ltd products including software upgrades and application information please contact your local VitalWell Electronics Pte Ltd Sales entity VitalWell Electronics Pte Ltd provides customer technical support using phone and or e mail means For customer technical support please contact your local VitalWell Electronics Pte Ltd sales entity VitalWe
9. act as Terminal keys Windows keys Backspace key sends CthH Del Cti H Space Ctrl H ASCII Setup Emulation Auto detect v Terminal Setup ASCII Sending Send line ends with line feeds Telnet terminal ID ANSI Echo typed characters locally Backscroll buffer lines 500 Line delay o milliseconds Character delay 0 milliseconds C Play sound when connecting or disconnecting ASCII Setup ASCII Receiving C Append line feeds to incoming line ends C Force incoming data to 7 bit ASCII Wrap lines that exceed terminal width VitalWell Electronics Pte Ltd www vital well com 21 C Sleep mode notes VW320 series are built in with configurable sleep modes to suit various applications When go to sleep mode the board can be waked up by 1 I O pin S103 1 2 W O R timer only S103 2 3 Both S103 3 104 pin 9 is used to wakeup board when pin wakeup mode is enabled S103 1 or 3 A falling edge on 104 will wake up board from sleep mode 104 should be kept low to keep the board be in active mode A rising edge will put the board back to sleep mode VW320 have another wakeup event WOR functions When WOR sleep mode enabled WOR timer be set at S116 200ms step the board will auto wakeup by a WOR timer overflow and will auto listen a mater s WOR beacon signal If yes the board will info the external MCU by pull down 101 and
10. ant to confirm the settings by enter AT L to have a setting s list After everything is confirmed you can enter ATO and press the Enter key to leave the configuration mode to operation mode Here is a typical setting list file for a transparent mode lt Setting txt gt ATS100 60 ATS101 1 ATS102 5 ATS110 3 ATS111 0 ATS112 3 ATS120 192 168 ATS121 100 ATS122 200 ATS123 127 ATS124 0 ATS125 3 ATS126 0 ATS127 0 End B 2 Turn on Software flow control Xon Xoff ATS101 1 B 3 Changing Operation Mode ATS124 m m 0 1 2 3 VitalWell Electronics Pte Ltd www vital well com 18 B 4 A typical point point configuration using Addressed Mode lt Clientl1 gt ATS100 60 ATS101 1 you can turn off Xon Xoff by ATS101 0 ATS102 5 ATS110 3 ATS111 0 ATS112 3 ATS120 192 168 ATS121 100 device ID ATS122 200 default destination id ATS123 127 ATS124 2 Addressed Mode ATS125 3 ATS126 0 no address at the header ATS127 0 lt Client2 gt ATS100 60 ATS101 1 you can turn off Xon Xoff by ATS101 0 ATS102 5 ATS110 3 ATS111 0 ATS112 3 ATS120 192 168 ATS121 200 device ID ATS122 100 default destination id ATS123 127 ATS124 2 Addressed Mode ATS125 3 ATS126 0 no address at the header ATS127 0 VitalWell Electronics Pte Ltd www vital well com 19 B 5 A typical Server Client configuration using Addressed Mode lt Server gt ATS100 60 ATS101 1 ATS102 5 ATS110
11. characters typed in configuration command mode are converted to upper case before being interpreted by the configurator Thus commands can be typed using either upper or lower case Despite its similarity to standard telecommunication modem it remains a radio link modem and is consequently fitted with some particular and specific AT commands proper to radio transmission l e communication channel radio rate VitalWell Electronics Pte Ltd www vital well com 4 l 3 Configuration Commands in Detail Operating mode Configuration Mode Activation Command gives an instant access to the modem s parameters configuration mode AT mode Command should be entered one by one The time between two must be between 50ms 200ms Answer gt Communication mode activation ATO ATO command gives an instant access to the modem s Operating mode ATO command is used to get out of Configuration Mode And Parameters will be saved to on chip non volatile memory Answer Good Bye Communication mode activation ATX ATX command gives an instant access to the modem s Operating mode ATX command is used to get out of Configuration Mode And Parameters will NOT be saved to on chip non volatile memory and only changed in RAM After reset it will restore the previous saved parameters Answer Good Bye VitalWell Electronics Pte Ltd www vital well com
12. communication channel i e on the same frequency lll 2 Examples Configuration with AT commands User Switch to Configuration mode Modem gt User ATS120 192 168 lt CR gt Set network ID to 192 168 Modem gt User ATS123 120 lt CR gt set cluster id to 120 Modem gt User ATS124 0 lt CR gt Transparent mode selection O Modem gt User ATO lt CR gt Switch to operating mode Modem Good Bye VitalWell Electronics Pte Ltd www vital well com 12 CHAPTER IV TRANSPARENT SECURED MODE In order to confirm the good quality of transmitted data frames and to avoid data loss data frame control between radio modems are added to the transparent mode so that each data transfer is verified IV 1 Operation Transparent secured mode s purpose is to offer an optimal radio link quality and to provide transparent mode with the necessary security in case frame control would not be included within the user s application software The risk of data loss is therefore much weaker Moreover a flow control Xon Xoff can be enabling to be performed on the serial link in order to warn the user that the data buffer is saturating The receiving unit analyses this data frame and checks its consistency When the data frame is received correctly the receiver transmits an Acknowledgement back to the transmitter and delivers the received data frame to its serial link In case the reception is not satisfying no acknowledgement is r
13. e header together with payload default E g When S126 1or 3 the 10 ABCD inputs will sent data ABCD to address 10 when S126 2 or 3 the output 2 ABCD means the data come from address 2 Indicates the acknowledgment handling method Used for Addressed Transparent Secured Mode Only the lower 4bits in this byte will be RW the upper 4 bits R is used by system to indicate the RF acknowledgment status Or S127 Echo back Ack to host _ 0 No Default OK or fail signal is not sent to Host R W 1 OK or fail signal will be sent to host By default in case of problems the modem will retry automatically for the numbers which set by register S125 but doesn t assert the signals to host If enable after each successful transmission a Synchronize byte 0x16 will be sent out if after retry still fail a NAK byte 0x15 will be sent to the host Node Type R W S128 Node Type Normal node not intent to route a message 1 Repeater node This is a repeater and will route any message it received Repeater Enable control R W S129 Repeater 0 Disable Enable 1 Enable If S129 1 the TX package will automatically routed to amp via the repeater address defined by S130 Repeater Repeater Address R W S130 Address If S129 1 this register will set the desired repeater s address All Tx package will be send to this node first and the repeater will automatically
14. eceived by the transmitter The transmitter then repeats the data frame transmission after a random delay The number of iterations can be configured via S126 register Transparent secured mode shall be operated for point to point communications only At serial port level the statements of whether the data frame has been transmitted or not can be asserted to the user by enable the bit in S128 register IV 2 Examples Configuration with AT commands User I Switch to Configuration mode Modem gt User ATS120 192 168 lt CR gt Set network ID to 192 168 Modem gt User ATS123 120 lt CR gt set cluster id to 120 Modem gt User ATS124 1 lt CR gt Transparent Secure mode Modem gt User ATO lt CR gt Switch to operating mode Modem Good Bye VitalWell Electronics Pte Ltd www vital well com 13 CHAPTER V ADDRESSED MODE The addressed mode is similar to a multipoint mode All modems can communicate with each other by addressing each frame to one of them V 1 Operation Addressed mode s purpose is to offer an optimal radio link performance providing the multipoint access of the transparent mode Compared to the transparent mode the addressed mode therefore includes the additional feature to address each data frame to a specific modem When enabled the modem can identifie the clients with a specific number added at the beginning of each data frame For example 1 Hello sends the data frame Hello to Cli
15. ent 1 The address header can be omitted by setting the address_at_the_header control register S127 to 0 ATS127 0 Then all of the data frames will be sent to the default address register S123 This is useful when in a server client configuration all clients set the default address to their server address For example when S127 0 S123 1 Hello sends the data frame Hello to server 1 Receiver client recognizes the Client transmitting modem by decoding the data frame and send the data frame to its serial link When enabled the modems can inform the hosts with a specific number added at the beginning of each data frame received For example 2 Hello indicates that data frame Hello comes from Client 2 The software flow control Xon Xoff can be enabled ATS101 1 on its serial link V 2 Examples Configuration with AT commands User Switch to Configuration mode Modem gt User ATS120 192 168 lt CR gt Set network ID to 192 168 Modem gt User ATS121 10 lt CR gt set device id to 10 Modem gt User ATS122 11 lt CR gt set default destination id to 11 Modem gt User ATS124 2 lt CR gt Addressed mode Modem gt User ATS126 0 lt CR gt no address header data will be sent to the default Modem gt User ATO lt CR gt Switch to operating mode Modem Good Bye VitalWell Electronics Pte Ltd www vital well com 14 CHAPTER VI ADDRESSED SECURED MODE The addressed secured mode is s
16. evice ID jin the payload data will sent to this address Group ID Used only for Transparent Mode or Transparent R W S123 Group ID Secured Mode All and only devices with the same cluster id together with the network id will be linkable Operation Mode R W S124 Operation _ 0 Transparent Mode default Mode _ 1 Transparent Secured Mode _ 2 Addressed Mode _ 3 Addressed Secured Mode 10 Testing mode in this mode the module will automatically transmit a pre defined string once a second It can be used to test the linkage range without a host 20 test mode 2 used for pattern test During this mode the modem will Tx a 20byte s 0x00 0x01 0x00 0x01 Data stream once a second 21 test mode 3 Tx un modulated carrier signal 22 test mode 4 Tx GFSK modulated spectrum signal Number of recoveries counts in case of radio conflicts R W S125 Number of Used for Addressed Secured Transparent Secured Mode Retries Default 3 Indicates whether Address at the header Bit O for TX bit 1 ifor RX For addressed mode only Address at R W S126 the Header Bit 0 TX amp RX _ 0 Data will be sent to default address Register S123 VitalWell Electronics Pte Ltd www vital well com 10 _ 1 Decode the target address from the header when TX Bit 1 _ 0 when receive forward the payload without address _ 71 when receive add the message s source address at th
17. imilar to a addressed mode but with acknowledgment handling on the radio VI 1 Operation Addressed secured mode s purpose is to offer an optimal radio link quality Compared to the addressed mode the addressed secured mode therefore includes the additional feature to retransmit the data frame in case of radio collisions All the address handling method is identified with the addressed mode And the radio acknowledgment handling method is identified with the transparent secured mode The software flow control Xon Xoff can be enabled ATS101 1 on its serial link VI 2 Examples Configuration with AT commands User Switch to Configuration mode Modem gt User ATS120 192 168 lt CR gt Set network ID to 192 168 Modem gt User ATS121 10 lt CR gt set device id to 10 Modem gt User ATS122 11 lt CR gt set default destination id to 11 Modem gt User ATS124 3 lt CR gt Addressed Secured mode Modem gt User ATS125 3 lt CR gt set the retries 3 in case of collision Modem gt User ATS126 0 lt CR gt no address header data will be sent to the default Modem gt User ATS127 0 lt CR gt no echo back host for the acknowledge Modem gt User ATO lt CR gt Switch to operating mode Modem Good Bye VitalWell Electronics Pte Ltd www vital well com 15 CHAPTER VII ORDERING INFORMATION Ordering Code Code Description VW320 X Interface TTL RS232 VitalWell E
18. lectronics Pte Ltd X 4 Frequency band at 433MHz ISM X 8 Frequency band at 868MHz ISM X 9 Frequency band at 915MHz ISM www vital well com 16 APPENDIX A Modems and boards Installation Principles and cautions _ The radio environment should be closely studied prior to any installation in order to determine whether and where the installation will be optimal _ The modems should be located as high and as free as possible so that a line of sight propagation is established between modems to achieve a better radio link _ The modem should not be surrounded by metallic masses because of the disturbances caused by a reflection phenomena _ The electrical disturbances can come from various sources and should be avoided _ Engines _ High current devices _ Power relays _ Transformers _ Etc _ Vibrations and or shocks can also be source of disturbances It is therefore advised to mount the modems on silent blocks in order to stabilize it whenever necessary VitalWell Electronics Pte Ltd www vital well com 17 B Register setting tips and examples B 1 Configuration list file You can put a typical setting list into txt file After commanding the modem into configuration mode you can send this file to modem via serial link In hyper terminal this is done by choosing Transfer gt Send Text File Then later you can just only adjust 1 or 2 registers settings depending on the requirement Or you may just w
19. ll Electronics Pte Ltd Tel 86 0756 3867295 Block D3 415 416 Southern Software Park TangJia ZhuHai China 519080 vital well com INTRODUCTION The VW series Radio Modem provides the capability of a short range reliable wireless point to point point to multipoint and mesh network RF data communications link The VW series modem can be used in a variety of data communications applications that require a simple to use invisible data link The radio modem is designed to interface to a variety of host devices These devices include computers receipt printers PLC s data loggers SCADA devices and intelligent control systems The serial data transferred over the radio link is not altered the output serial data stream is the same as the input serial data stream The radio modems provide a two way data communications links where each unit can accept serial data and also output serial data The VW series radio modems are fully self contained units requiring only an external 5VDC or 3 3VDC power source to operate The radio modules used in the radio modems have been selected to meet the requirements of unlicensed operation in the international ISM bands and are therefore acceptable for use in many countries Features 4 operation modes Transparent mode Transparent secured mode Addressed mode and Addressed secured mode Repeater supported Deep sleep mode Server Client mode Broadcast Multi drop mode Serial
20. loader is available Bootloader V2 0 Vitatwell Electronics Pte Ltd E COM3 v ey PUTT ee Upload Firmware Firmware uploader s interface VitalWell Electronics Pte Ltd www vital well com 23 Rev 1 0 Rev 2 0 Rev 2 2 Rev 2 3 Rev 2 4 Rev 2 5 i Uae Rtas g Rev2 5A h Rev 2 5B i Rev3 0 k Rev3 1 I Rev 3 2 j Rev 4 0 Document History Initial release for VW1203A Add VW1100A amp VW2500A Add ordering information Add FEC control register for VW1100A amp VW2500A Add VW1205A i Add sleep mode 232T S103 amp testing mode S124 ii Signal at Pin 9 changed iii Repeater function S128 S130 Correct some typing error Description changes on register S102 Add VW4432A change notes for register S112 Add register S104 other minor changes 1 Change notes for Register S124 2 Add notes for register S115 RSSI value show hide control 3 add notes for time of ready to Tx Rx after P O R 1 separate manual for VW320 2 Change notes for register S103 sleep control 3 Add Register S116 W O R timer control 4 notes for boot loader 5 new ATX command added page 5 VitalWell Electronics Pte Ltd www vital well com 24 VitalWell Electronics Pte Ltd Tel 86 0756 3867295 Block D3 415 416 Southern Software Park TangJia ZhuHai China 519080 vital well com
21. protocol format is 9600bps 8 data 1 stop no parity Selectable flow control of software none Selectable radio speed channel and radio power On air data encryption error checking and data acknowledgements Easy configuration by AT commands Built in configuration and diagnostic functions This manual describes the electrical specifications and different functioning modes available on the VW series This description will also help you to understand the principles behind the configuration registers and to use them more efficiently VitalWell Electronics Pte Ltd Tel 86 0756 3867295 Block D3 415 416 Southern Software Park TangJia ZhuHai China 519080 vital well com CONTENTS CHAPTER ELECTRICAL SPECIFICATION 0 eee 1 CHAPTER II CONFIGURATION MODE c ccc cc cece eae ee ee 3 Il 1 Entering Configuration Mode 11 2 Command Format II 3 Configuration Commands in Detail 4 Registers Description CHAPTER IlI TRANSPARENT MODE eee 9 lll 1 Operation lII 2 Examples CHAPTER IV TRANSPARENT SECURED MODE a 10 V 1 Operation IV 2 Examples CHAPTER V ADDRESSED MODE 11 V 1 Operation V 2 Examples CHAPTER VI ADDRESSED SECURED MODE 0 12 VI 1 Operation VI 2 Examples CHAPTER VII ORDERING INFORMATION eee eee 13 APPENDIX 3 scscccicscdcissdscedsadcavsascecsassehensdetenvvarsesussiuyeassvedersevsevsscccvsaceee 14 A Modems and boards
22. re and after when escape sequence is entered These three characters must not be sent as one continued frame The delay between any 2 characters must be between 20ms 200ms for the sequence This prevents the radio modem from interpreting the escape sequence as data and the vice versa The guard time must also be met when the Radio Modem is initially powered up Configuration changes are stored permanently in non volatile memory within the Radio Modem Exiting Configuration Mode and returning back to data transfer mode is accomplished by typing ATO at the command prompt This will force a soft reset of the Radio Modem resulting in any configuration changes taking effect 11 2 Command Format VW modem s parameters are set through the use of AT type commands sent on the serial link AT commands complies with Hayes protocol used in PSTN modem standards This AT protocol is used to configure the modem parameters based on the following principles A data frame always begins with the two ASCII AT characters standing for ATtention VitalWell Electronics Pte Ltd www vital well com 3 _ Commands are coded over one or several characters and may include additional data _ A given command always ends up with a lt CR gt Carriage Return AT Command Additional data lt CR gt Note The delay between 2 characters of the same command must be less than 30 seconds All alphabetical
23. route the package to the desired destination VitalWell Electronics Pte Ltd www vital well com 11 CHAPTER II TRANSPARENT MODE The transparent mode is the default communication mode based on a null modem cable emulation Basically the modems in transparent mode is equivalent to a half duplex module and reproduces the half duplex function of a RS 485 RS 232 or RS 422 cable This mode can be used as Point to Point or Point to Multi point with all the modems receiving the messages sent by any modem lll 1 Operation Radio modems in transparent mode behave like wired serial links Therefore radio modems automatically transmit every serial data received on their radio link and also transmit all radio information received on their serial link The transparent mode can be operated for both point to point and multipoint links The software flow control Xon Xoff can be enabling for this mode if the user want to send a large block data in this mode However no flow control on the radio link is performed by the radio modems in transparent mode Therefore the data control must then be carried out by software applications used by various protocols such as ProfiBus ModBus etc Consequently the latency time is reduced to its minimum as the modem no needs wait to check the acknowledgment byte Any unit with the same network ID and group ID configured in transparent mode will receive every radio data flowing on the same
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