Home

User Manual

1. gt of ay 2 RD RD RD RD 3 3 3 3 ID fe 5 TD TD E 5 1D SC fy SC SG 15 gt SC RTS ES g RTS RTS ES INE CTS E CIS CTS E DSR 71 DSR DSR 7 DSR DTR 7 DTR DTR DTR DCD DCD DCD DCD SA NA SF a WI MOD 9 D DTE HOST WI MOD 9 D DCE HOST DB9 DB9 DB9 DB9 MALE FEMALE MALE MALE Hardware handshaking using the CTS RTS lines is provided The CTS RTS lines may be used to reflect the status of the local unit s input buffer or may be configured to reflect the status of CTS RTS lines at the remote site The WI MOD 9 D does not support XON XOFF Page 15 WI MOD 9 D Radio Modem User Manual v1 9 Example cable drawings for connection to a DTE host a PC or another DCE host or modem are detailed above DB9 Connector Pinout Pin Name Direction Function 1 DCD Out Data carrier detect z l on when link is established in controlled mode on always in transparent mode 2 RD Out Transmit Data Serial Data Output 3 TD In Receive Data Serial Data Input 4 DTR In Data Terminal Ready DTR can be configured to initiate low power mode or to force a link disconnection hang up in controlled mode 5 SG Signal Ground 6 DSR Out Data Set Ready always high when unit is powered on 7 RTS In Request to Send hardware flow control configurable 8 CTS Out Clear to send hardware flow control configurable 9 RI Ring indicator indicates another module i
2. The radio message includes the following e A 30 msec leading sequence of alternating 1 s and 0 s provides the receiving unit with time to capture and lock onto the incoming signal This time is reduced to Smsec for the fast controlled mode option point to point only A system address is superimposed on each message to provide discrimination between different WI MOD 9 D systems on the same radio channel Each WI MOD 9 D unit in the same system must be configured with the same system address refer Section 4 Configuration Although other WI MOD 9 D modules may hear the radio transmissions because they have a different system address the radio transmission is ignored and no serial data is output e In transparent mode a group address is included and in controlled mode unit addressing is included An error check 16 bit CRC may be configured by the user Up to 530 bytes of data may be transmitted in a message the maximum message size is configurable between 10 and 530 bytes The data consists of a sequence of 8 bit bytes Start stop and parity bits are not transmitted but they are re generated at the receiving unit if configured A transmit delay time and a receive delay time may also be configured These parameters may be used to fine tune and give priority to different WI MOD 9 D units in a system e After each message is transmitted a WI MOD 9 D unit will not transmit another message during the
3. on or 1 is when the switch is down The switches in the diagram have the pattern 0100 adas WI MOD 9 D Manual v 1 9 Page 48 Chapter Four Configuration Switch Function Equivalent Hayes Command at start up 0000 Normal Operation no change 0100 Restore Factory Defaults AT amp F Baud rates 1100 Perform Transmit BER Test AT amp TO for use with AT amp T1 at Serial Radio other module see section 6 2 1 0010 Transparent Mode AT amp MOBO0C4 amp L1 9600 19200 1010 POZA AT8 MOB1C68 L1 19200 57600 0110 E AT8 MOB1C98 L1 38400 57600 1110 Palle AT amp MO0B2C10 amp L1 57600 115200 T amp 0001 Fast Controlled Mode Auto AT amp M3 amp U1BOC4 amp EI1 amp Z0 2 amp 9600 19200 connect master L2 1001 AT amp M3 amp U1BIC6 amp E1L amp Z0 2 amp 19200 57600 L2 0101 AT amp M3 amp UI1BICIXEL amp Z0 2 amp 38400 57600 L2 1101 a AT amp M3 amp U1B2C10 amp E1 amp Z0 2 57600 115200 amp L2 0011 Fast Controlled Mode AT amp M3 amp U2B0C4 amp E1 amp L3 9600 19200 Auto connect slave 1011 ee AT amp M3 amp U2B1C6 amp E1 amp L3 19200 57600 0111 A e AT8M38 U2B1C98E18L3 38400 57600 1111 Po AT amp M3 amp U2B2C10 amp E1 amp L3 57600 115200 Page 49 WI MOD 9 D Radio Modem User Manual v1 9 Chapter Five General EMC specification Radio specification Housing Terminal blocks LED indication Operating Temperature Power Supply Nominal supply Current Drain 12VDC C
4. A radio channel cannot provide as secure a data channel as a wired connection The WI MOD 9 D uses a radio band with a low level of natural or industrial noise however there is a chance of interference from other users of the unlicensed radio channel We recommend that the flow of data over the radio channel is controlled by using error detection and handshaking that is returning an acknowledgment transmission if a data packet is received on the radio channel without error This function can be performed by either the host devices or the WI MOD 9 D modules The modules may be configured by the user to operate in one of two modes In transparent mode it is assumed that the host devices control the flow of data In controlled mode the WI MOD 9 D units control the flow of data 1 2 Transparent Mode The default configuration of the WI MOD 9 D modem is transparent mode the modules are set in this mode at the factory In transparent mode the WI MOD 9 D provides no control of the data transmissions no error correction Input data is simply transmitted by radio and every other WI MOD 9 D unit in that system which receives the transmission will output the data This mode relies on the host devices to perform the handshaking function and re transmitting serial data if the data is corrupted no handshake It also relies on the host devices to include any addressing necessary in the data In this mode modules are not configure
5. Configuration problems are easier to recognize when the system units are adjacent Following installation the most common problem is poor communications caused by incorrectly installed antennas or radio interference on the same channel or the radio path being inadequate If the radio path is a problem ie path too long or obstructions in the way then higher performance antennas or a higher mounting point for the antenna may rectify the problem Alternately use an intermediate WI MOD 9 D Module as a repeater The foldout sheet WI MOD 9 D Installation Guide provides an installation drawing appropriate to most applications Further information is detailed below Each WI MOD 9 D module should be effectively earthed via the GND terminal on the WI MOD 9 D module this is to ensure that the surge protection circuits inside the WI MOD 9 D module are effective 2 2 Antenna Installation The WI MOD 9 D module will operate reliably over large distances The distance which may be reliably achieved will vary with each application depending on the type and location of antennas the degree of radio interference and obstructions such as hills or trees to the radio path Typical reliable distances are USA Canada 15 miles 6dB net gain antenna configuration permitted 4W ERP Australia NZ 12 km unity gain antenna configuration 1W ERP Longer distances can be achieved if one antenna is mounted on top of a hill To achieve the maximum transm
6. Packet Size bytes 4 4 3 Other Parameters Tx Hold Off sec Radio Data Rate jo Rx Hold Off sec Select the radio data rate which you want to use Note that modules will only communicate with each other if they have the same radio data rate If you select a rate which is faster al bf than the serial rate the WI MOD 9 D will automatically set Page 37 WI MOD 9 D Radio Modem User Manual v1 9 transmission delay parameters in registers S18 and S19 refer section 3 8 To disable this deselect the PLC Mode box in the Serial configuration window CRC Error Checking It is normal for error checking to be disabled for transparent mode and enabled for controlled However you can select either for either mode Refer to section 3 of this manual for a description on the operation of error checking Packet Size bytes This selects the maximum number of bytes which will be transmitted in one message If more than this number of bytes is input into the WI MOD 9 D then the module will transmit more than one message The default value is 530 bytes which is the largest packet value If you are operating in a noisy radio environment then the system may be more reliable if you reduce the maximum packet size and transmit a larger number of small messages rather than a lesser number of large messages Transmit and Receive Hold off delay times A transmit delay time and a receive delay time can be configured Th
7. device Using the four DIP switches located in the end plate of the module It is not possible to select addressing using these switches so these switches are normally used as a quick way to try other configuration modes or data rates Note If you are adding a new WI MOD 9 D to an existing system with older modules you will need to set configuration register S21 to 0 to make it compatible with the older modules Older modules have serial number less than xxxx 190 xxxx for example serial number 0804 187 9469 will need to have register S21 set to 0 WI MOD 9 D Manual v 1 9 Page 32 Chapter Four Configuration 4 2 Addressing A WI MOD 9 D network comprises modules with the same system address The system address is a 8 bit value values O to 255 Only modules with the same system address will communicate with each other If you are adding another module to an existing system use the same value as the existing modules If you are starting a new system select random values and use the same value for each module In transparent mode a group address also needs to be configured The group address is also a 8 bit value values 0 to 255 This is not required in controlled mode In controlled mode each module is also configured with a unit address between 0 and 127 there can be up to 128 modules in the one controlled mode system If fast controlled mode is used the unit address must be between 0 and 15 there can only be
8. low battery voltage etc Fade margin is an indication of how far a radio path can deteriorate before reliable communication becomes unreliable When using this feature the current value of the received signal strength is displayed in dBm decibels referenced to 1 mW This value is updated every half second To check the radio path between two units force the remote unit to generate data and read the signal level from the local terminal The remote unit can be forced to transmit by selecting AT amp TO or by selecting 0011 on the four DIL switches and resetting the power to the module Also measure the background noise by stopping transmission from the remote module and reading the value from the terminal The readout will jump around as the radio hops between channels determine the average value For reliable operation that is a bit error rate of more than in 300 the transmitted signal should be better than the following margins Radio Baud Rate Margin above Noise Minimum Value dBm 19200 10 95 57600 15 90 115200 20 85 For example for transmissions at 19200 baud the radio signal should be at least 10dB better than the background noise level or better than 95dBm if the noise level is less than 105dBm If the background noise is 100dBm then you need 90dBm of signal for reliable operation If the background noise is 120dBm then you need 95dBm of signal for reliable operation When using directional antennas YAGI
9. 9 D Configuration 4 4 1 Transparent Mode File Communication Advanced Help The default setting of the program is 5 Sala nale transparent mode Select the system address or use the random value eee gt Transparent Mode Options already selected 1f the module is j System Address to become part of an existing Transparent Mode 136 system then you must select the j Ari same system address as the existing PA r aff modules Also select the group mes address only modules with the C Auto Connect Master Group Address 2 same group address will Auto Connect Slave 2 al communicate with each other Mo V Go On Line On Startup The Go On line On Startup box v will normally be selected for ry transparent mode If you deselect this then the module will start up in command mode and will not operate until the host device sends it a AT command to go on line Transparent Repeater When you select a transparent repeater the program will ask you to enter a second group address The repeater will re transmit messages from the first group to the second group and from the second group to the first group WI MOD 9 D Configuration A transparent repeater will transmit File Communication Advanced Help data from its host device if there is a host connected using the first group address and will only output data to Operating Mode Controlled Mode Options it
10. Delay before and after entering the Time Units 20 milliseconds escape sequence also Max Delay default 50 between characters of the escape sequence Page 59 WI MOD 9 D Radio Modem User Manual v1 9 Units Seconds O disables How frequently to send a Link Check message Usually set less than the timeout set by the AT Tcommand Default 0 How many times to attempt a connection after an ATD command Default 5 Units Seconds How long to run tests AT amp Tx Default 0 no time out Units dBm RSSI indication of last Reason module last returned to command mode i e connection lost Max Packet size 20 S14 x 2 Default S2 1 255 Escape Sequence Character Normally 43 ASCII code S3 0 127 Carriage Return Character Normally 13 lt CR gt S4 0 127 Line Feed Character Normally 10 lt LF gt S5 0 127 Back Space Character Normally 8 lt BS gt S6 0 255 Link Check Timer S7 1 255 Number of Connection attempts S8 0 255 Test Timer S9 0 255 Module Receive Level received message S10 0 255 DTR Loss Detection Time Units 10 milliseconds S11 0 255 Not used S12 read Command Mode Diagnostic only S12 0 Reset ATZ or Power Up S12 1 Escape sequence S12 2 DTR lowered S12 3 No ACK from remote module after connected S12 4 Activity timer timed out S12 5 No response to dial request to remote module S12 6 BUSY response from remote module on dial request S12 7 Character recei
11. data is sent out the radio with the configured system AT amp S and group AT amp G address All incoming radio data with the correct system address and matching group address is sent out the serial port and also re transmitted out the radio port using the unit address AT amp U setting as the group address All incoming radio data with the configured system address and group address matching the Unit address is re transmitted out the radio with the group address set to the group address Controlled Mode Fast Operation Controlled Mode No repeaters may be used Abort Connection Control Controls whether the module will abort a connection attempt in controlled mode if a character is entered Ignore characters entered while attempting to make a connection WI MOD 9 D Manual v 1 9 Page 58 Appendix A amp Nie AT amp S AT amp T amp TO amp T1 amp T2 amp T3 AT amp V amp V0 amp V1 AT amp U AT amp W AT amp Z AT T S Registers Hayes Commands If a key is hit or a character input while attempting to connect abort the connection attempt and return to command mode Set module s System Address Range 0 255 Self Tests Allows in field diagnostics and factory testing Transmit Bit Error Rate Test Generates pseudo random data and sends out radio Receive Bit Error Rate Test Receives data from amp TO module and records BER statistics Transmit amp Receive BER Test Used with a second module configur
12. established and no data can be transferred The module will not attempt to reconnect again until it receives another connect command from its host WI MOD 9 D Manual v 1 9 Page 26 Chapter Three Operation The link is normally disconnected by the host issuing a disconnect command In this mode it is normal for a host to connect and disconnect to several slave modules using AT commands A common example is a PC polling several analyzers or dataloggers The PC connects to a remote station one at a time transfers data disconnects and connects to the next station Up to five repeater addresses may be configured as part of the remote address That is up to 5 intermediate modules can act as repeaters between the master and slave modules The RS232 DTR signal can be configured to act as a disconnect signal If so configured the DTR signal will force a hang up DCD reset if the host device resets the DTR signal 3 6 4 Fast Operation Controlled Mode This configuration does not allow the use of repeater addresses In fast operation mode the master unit continually communicates with the slave such that any data transfer can be achieved with a small lead in approx 5 msec The operation is similar to single connect mode 3 6 5 CTS RTS Flow Control Flow control is a configurable parameter On the RS232 port if CTS RTS is enabled the CTS signal will be active when the input data buffer is not full Note that CTS RTS is disabled in the defaul
13. packet is configurable by the user maximum is 530 bytes If less data than the maximum size is input to the WI MOD 9 D then the WI MOD 9 D will transmit the actual data input If more data is input than the maximum size then the WI MOD 9 D will transmit multiple packets until all of the data is transmitted Because of radio start up delays the effective radio data rate will be lower than the transmitted data rate If you are sending large blocks of data and the serial rate is equal or more than the radio rate we recommend that you use CTS RTS flow control to prevent the input buffer from overflowing If you use the maximum data rate of 115 200 bits sec the best effective overall rate is approx 65 700 bits sec using a serial speed of 76 800 bits sec If you use a serial speed of 115 200 the effective overall rate will be lower If you are required to use a serial speed of 115 200 bits sec then we suggest that you configure the maximum packet size to 60 bytes this will give faster performance than the default setting of 530 bytes 3 2 1 Character Type The WI MOD 9 D may be configured by the user to recognize the following types of characters 7 or 8 data bits even or odd or no parity 1 or 2 stop bits Most applications will require the character type to be the same at each WI MOD 9 D modem in the system Nevertheless the character type may be configured to be different at different WI MOD 9 D modems Data is transmitted by radio as an
14. primary group address Controlled mode auto connect Master module AT amp EIL amp M2 amp L2 The module will start up in operating mode and will automatically try to connect to the destination address saved in AT amp ZO this is the slave unit The destination address needs to be entered for example AT amp Z0 24 will store a destination address of 24 AT amp Z0 33 34 35 5 will store an address sequence where 5 is the destination address and 33 34 and 35 are repeater addresses The first repeater will be 33 The WI MOD 9 D master will attempt to connect to the destination address slave If the module cannot connect or if communications fails the module will continually send connect messages to make a connection Slave module AT amp EIL amp M2 amp L3 The module will start up in operating mode and will automatically accept any connect message addressed to it Low Power Mode Low power mode is normally used with auto connect controlled mode although it can also be used with other controlled modes Before you configure the unit for auto connect controlled mode enter AT amp D3 This allows the DTR signal on the RS232 port to control the module When the host resets signal low the DTR signal the module will disconnect the radio link and the module will revert to low power mode the module will switch off its radio receiver and microprocessor When the host activates the DTR signal the module will start up and attempt
15. radio telemetry module This device complies with Part 15 247 of the FCC Rules Operation is subject to the following two conditions This device may not cause harmful interference and This device must accept any interference received including interference that may cause undesired operation This device must be operated as supplied by Weidmuller Any changes or modifications made to the device without the written consent of Weidmuller May void the user s authority to operate the device End user products that have this device embedded must be supplied with non standard antenna connectors and antennas available from vendors specified by Weidmuller Please contact Weidmuller Inc for end user antenna and connector recommendations Notices Safety Exposure to RF energy is an important safety consideration The FCC has adopted a safety standard for human exposure to radio frequency electromagnetic energy emitted by FCC regulated equipment as a result of its actions in Docket 93 62 and OET Bulletin 65 Edition 97 01 Limited Warranty Disclaimer and Limitation of Remedies Weidmuller products are warranted to be free from manufacturing defects for a period of 24 months from the effective date of purchase by the end user The effective date of purchase is decided solely by Weidmuller This warranty does not extend to failures caused by the operation of the equipment outside the particular product s specification or use of the modu
16. same as the other modules so that 100 can act as a repeater Set the module to factory default settings AT amp F Set the system address to the same random number AT amp S217 Set the unit address to 100 AT amp U100 Set the autodial address to 101 AT amp Z0 101 Set the operating mode to controlled mode auto connect master AT amp M2 amp L2 Exit and save the configuration AT amp W ATO The configuration for 101 is not shown as it is not part of the active link 4 7 Switch Configuration Some configurations can be made using the four DIL switches mounted in the end plate of the module The DIL Switches are only read at power up and change the volatile configuration of the module The non volatile configuration is not changed DIL Switch settings allow the factory configuration to be restored testing functions and some simple back to back configurations If you want the module to start up in the same way each time you will need to leave the switches in the same setting If you are using the switches to do temporary changes then you should change the switches back to the zero position after powering up Note that these switch settings do not set the module system or group addressing this still needs to be set by Hayes Commands or the configuration program The four switches are located on the top end plate as per this diagram If you look at the end of the module with the front of the module up then Switch 1 is the left most switch and
17. to connect to its slave address Controlled mode single connect AT amp EI amp M2 amp L0 both master and slave module WI MOD 9 D Manual v 1 9 Page 42 Chapter Four Configuration The module starts up in command mode and waits for a command from the host device An ATD command will initiate a connect command to another module HOST wi MOD _ 2 __ wi wop HOST 5 8 For example ATD8 to module 5 will initiate a connect command to be sent to module 8 Module 5 will respond with RINGING to its host If 8 is not already connected to another module it will connect set DCD and respond to 5 Module 8 will respond to its host with CONNECT and will automatically go to operating mode Module 5 will respond with CONNECT to its host and will also automatically go to operating mode If 8 does not reply 5 will make up to 5 attempts to connect and will then respond to its host with NO CARRIER If 8 is already connected to another module then it will respond to 5 with a busy message and 5 will respond to its host with BUSY or NO CARRIER this response can be configured under responses If there are repeater modules then the ATD command will have the form ATDrl r2 r3 r4 r5 d where d is the destination address and r is a repeater address rl is the repeater closest to the master unit For example ATD2 3 10 will try to connect to 10 via repeaters 2 and 3 Up to 5 repeater addresses may be
18. to separate it from radio messages from other devices A WI MOD 9 D in one system will hear other WI MOD 9 D systems and this can be a cause of interference In countries which allow the full 902 928MHz band such as USA and Canada there are eight hopping sequences and the first four do not use the same frequency channels as the last four this can give isolation between two systems That is a system with hopping sequence 1 will hear messages from another system using hopping sequence 3 but will not if the other system used hopping sequence 5 The hopping sequence is determined by the system address In countries which only allow half the band such as Australia and New Zealand it is not possible to separate systems in this way because the band is smaller and all hopping sequences use all channels available It is possible to separate systems by changing the message signature A WI MOD 9 D will not lock onto a message with a different signature and will ignore the message as RF noise There are four different message signatures available this is user configurable in register S21 refer section 4 of this manual This feature was introduced with firmware version 1 90 Earlier firmware versions only support a single fixed message signature The Firmware version may be read from the module using the configuration software provided with the module or by reading the serial number The firmware version is written in digits 5 thro
19. transmit delay time This could be used to allow a reply message to be received before the next message is sent This delay is a different delay to the delay introduces by the WI MOD 9 D if the serial data rate is less than the radio data rate e After a message is received a message will not be transmitted during the receive delay time This could be used to delay a reply message until other messages have been sent WI MOD 9 D Manual v 1 9 Page 20 Chapter Three Operation 3 3 Addressing A WI MOD 9 D network comprises modules with the same system address Only modules with the same system address will communicate with each other This feature allows more than one system to operate in the same area on the same radio channel We recommend that you select a random number for the system address In transparent mode each module is also configured with a group address A system may comprise several groups or sub systems Only modules with the same system and group address will communicate directly with each other but modules with different group addresses can communicate via a repeater The group address is used for repeater operation in transparent mode The group address is not used in controlled mode A WI MOD 9 D can also be configured with a unit address this gives the module a unique identification The unit address feature is not used in transparent mode but it is used in controlled mode The system address also det
20. two modules in any one fast controlled mode system In transparent mode the unit address is used as the second group address for transparent repeaters For modules not configured as a repeater the unit address is ignored For repeaters if a message is received with the correct system address and the first group address the data is output to the serial port and the message is re transmitted but with the second group address inserted If a repeater receives a message with the correct group address but with the second system address corresponding to the configured unit address then the data is not output to the serial port but the message is re transmitted but with the first or normal group address inserted 4 3 Default Configuration The default configuration of the WI MOD 9 D is transparent mode no error check no CTS RTS flow control serial rate 9600 radio rate 19200 character type 8 n 1 The system address will be set in the factory according to the module serial number The module may be forced to factory default setting by using any of the three configuration methods 4 4 Configuration Program The configuration program is Cfg_WI MOD 9 D This program will run under Windows 95 98 NT or 2000 The program may be obtained from the Product CD which came with your purchase or can be downloaded from our web page When you use this program you create a configuration in the PC and then load or program the configuration into th
21. used A repeater can already be connected to another module it can still act as a repeater for another link Once a connection is made DCD set any data sent will be acknowledged by the other module The connection will be broken DCD reset if an ACK is not received within 5 attempts to transmit a message Either host may disconnect the link using the ATH command or by using the DTR signal on the RS232 port refer to the AT amp D command in Appendix 1 When the link is disconnected for any reason the DCD output at each module is reset and each module will respond to its host with NO CARRIER each module will revert to command mode Fast operation mode In fast operation mode the master and slave modules continually exchange check messages to ensure fast operation The lead in time in fast operation mode is only 5 msec compared to 30 msec in normal modes Note that repeaters cannot be used in fast operation mode Either auto connect or single connect operation can be used Use M3 in the AT command instead of M2 Auto connect master AT amp M3 amp L2 amp E1 Auto connect slave AT amp M3 amp L3 amp El1 Single connect AT amp M3 amp LO amp El Page 43 WI MOD 9 D Radio Modem User Manual v1 9 Controlled Mode Link Check and Reset times If the master module has not sent or received a radio message within a preset time it will send a check message to make sure that the link is still active If it does not receive
22. 57600 76800 115200 7 or 8 data bits Transparent mode Controlled mode Configurable 8 bit LED s RSSI measurement in dBm Specifications 20 miles 20 km depending on local conditions Range may be extended using intermediate modules as repeaters RTS CTS DTR DCD hardware signals provided Max distance 4000 1 2 km Stop start parity bits configurable Broadcast system Addressed communications with acknowledged Hayes commands from host device Or via on board DIP switches OK DCD Radio and Serial RX TX Low signal receive led CTS RTS indication BER test Page 51 WI MOD 9 D Radio Modem User Manual v1 9 Chapter Six TROUBLESHOOTING 6 1 Diagnostics Chart INDICATOR CONDITION MEANING OK LED OFF Continuously e Power supply failure e CPU failure OK LED ON Continuously e Normal Operation Radio TX LED ON Flashes briefly e Radio transmitting Radio RX LED ON GREEN flash e Radio receiving data RED flash e Weak radio signal lt 95dBm Serial RX LED ON GREEN flash e Serial Port Receiving RED flash e Input buffer almost full Serial TX LED ON Flashes briefly e Serial port transmitting DCD LED ON Continuously e In transparent mode always on e In controlled mode a radio link has been established The green OK LED on the front panel indicates correct operation of the unit This LED extinguishes on failure as described above When the OK LED extinguishes shutdown state 1s indicated On pro
23. D 9 D Radio Modem User Manual v1 9 Response Codes Response codes display the status of the module in response to user commands The response code displayed depends on the ATV setting the ATX setting and the ATQ setting ATVO selects numeric response codes ATV1 selects verbal response codes The ATXn command selects extended response codes ATQO disables all response messages ATQ1 enables response messages The following table describes the messages A e symbol indicates that messages is displayed for the corresponding ATX setting Numeric Verbal Message ATX setting Comments Code XO X1 X2 X3 0 OK e e Valid Command Entered 1 CONNECT e Connection established CONNECT baud is displayed for X1 X2 X3 2 RING e e e e Module Received an incoming connection request 3 NO CARRIER e e Connection with remote module lost or not initiated 4 ERROR e e e Invalid Hayes command entered 7 BUSY e X0 X1 display NO CARRIER instead of BUSY 13 RINGING X0 X1 X2 Don t display RINGING message 15 CONNECT 19200 e e CONNECT is displayed for X0 17 CONNECT 57600 e e CONNECT is displayed for XO 19 CONNECT 115200 e e e CONNECT is displayed for XO WI MOD 9 D Manual v 1 9 Page 62
24. I MOD 9 D module The other module will recreate the serial data and output it as either a RS232 or RS485 serial signal The WI MOD 9 D unit provides two way communications each module can accept serial data and also output serial data The WI MOD 9 D module includes power supply microprocessor controller serial input output circuits and a 900MHz frequency hopping spread spectrum radio transceiver no external electronics are required The WI MOD 9 D radio frequency has been selected to meet the requirements of unlicensed operation for remote monitoring and control of equipment That is a radio licence is not required for the WI MOD 9 D modules in many countries See Chapter Five Specifications for details The units are configured from a PC using a free ware configuration package or from a PC terminal using Hayes commands RS232 is an electrical standard format for a full duplex point to point serial connection RS485 is an electrical standard format for a half duplex multidrop serial connection Up to 32 devices can communicate on a common RS485 serial bus Each WI MOD 9 D unit can only connect to one serial signal either RS232 or RS485 However different modules in the same system can connect to different types of serial signals For example RS232 data from one host device can be transmitted to a remote WI MOD 9 D unit and output as RS485 data to another host device The WI MOD 9 D has been designed to be flexible enough to co
25. I MOD 9 D units If the interference level is relatively small then it will not affect the performance of the system If interference is causing a problem try to improve the normal radio level by mounting the antennas higher or in a better location This not always possible System performance may be improved by changing the following parameters e If in transparent mode try controlled mode e If configured for a radio data rate of 115200 or 57600 bits sec reduce the rate to 19200 bits sec e If large radio messages are being transmitted reduce the maximum message length and transmit the data in more messages of smaller size Another common problem is the response time of the host software Some hosts operate by sending a message from one end and require a response to that message within a certain time If this time is less than the turn around time of the radio modem then the system will not operate It may be possible to lengthen the response time in the host software Page 31 WI MOD 9 D Radio Modem User Manual v1 9 Chapter Four CONFIGURATION 4 1 Before Configuring Configuration comprises selecting parameter values for the operation of the WI MOD 9 D unit Four pre set configurations may be achieved using the four DIP switches These configurations cover most applications refer section 4 7 Before you start configuration parameter settings must be decided The main parameters are Addressing system address gr
26. L3 AT amp M amp MOe SM1 amp M2 amp M3 AT amp N amp NO Enable CRC Error Checking Restore Factory Defaults This function is also available from the DIP Switches Set module s Group Address Range 0 255 Default 0 Flow Control Configuration Flow Control Disabled CTS Always high Module ignores RTS not used not used CTS RTS Flow Control CTS Reflects the state of the local buffer Module only transmits serial data when RTS is high RS 485 Control Must be selected for RS 485 to work CTS is high CTS goes low when transmitting data RTS is ignored Configuration of start up mode and controlled mode operation At power up the module enters command mode and waits for commands Normal single connect controlled mode operation If set to transparent mode in AT amp M the module automatically goes online For controlled mode ATD automatically dials the number stored in ZO ATA answers an incoming call Auto connect mode master The module dials the number stored in amp ZO automatically It continuously attempts to connect to that number Use DTR with the AT amp D command to control the connection Auto connect mode slave The module continuously attempts to answer any incoming call Use DTR with the AT amp D command to control the connection Operating Mode This allows selection between transparent mode controlled mode and fast operation mode Transparent Mode Transparent Repeater All serial
27. OAXIAL CABLE a STRESS RELIEF LOOP MAST WI MOD PROVIDE GOOD GROUND CONNECTION TO GND MAST MODULE AND SURGE ARRESTOR LOCAL OBSTRUCTIONS IF GROUND CONDITIONS ARE POOR INSTALL MORE THAN B Y j INSTALL AERIAL ABOVE EARTH STAKE ONE STAKE 2 2 2 Yagi antennas A Yagi antenna provides high gain in the forward direction but lower gain in other directions This may be used to compensate for coaxial cable loss for installations with marginal radio path The Yagi gain also acts on the receiver so adding Yagi antennas at both ends of a link provides a double improvement Page 13 WI MOD 9 D Radio Modem User Manual v1 9 Yagi antennas are directional That is they have positive gain to the front of the antenna but negative gain in other directions Hence Yagi antennas should be installed with the central beam horizontal and must be pointed exactly in the direction of transmission to benefit from the gain of the antenna The Yagi antennas may be installed with the elements in a vertical plane vertically polarised or in a horizontal plane horizontally polarised For a two station installation with both modules using Yagi antennas horizontal polarisation is recommended If there are more than two stations transmitting to a common station then the Yagi antennas should have vertical polarisation and the common or central station should have a collinear non directional antenna Also note that Yagi antennas
28. PTER ONE INTRODUCTION coci ncnsmoconinnicionncminoicncnci nicnonoicnsmciocniniicnsrs 7 1 1 GENERAL e dd ndo Loa o SZ OO 7 1 2 TRANSPARENT MODE canaria 8 1 3 CONTROELED MODE sesion 9 1 4 REPEATER UNITS 2 iaa E T E hed Se 10 CHAPTER TWO INSTALLATION fiscccsceccedtccdscccccsccecssceccccscevedeudesecescascsessdesssdesesseoes 11 2 1 GENERA an E AET 11 2 2 ANTENNA INSTALLATION ccccccccccsssssscscccccccessssssesccccccsseussssescesccseeeeacssesecscceeeuensssscscess 11 2 2 1 Dipole and Collinear antennas esseeeeeseeesesresseeeeesresstssrssressessresressersresreeseeseese 13 222 Yagi AMPS TAS a EENES 13 2 3 POWER SUPPLY ta ed idad 15 2 4 SERIAL CONNECTIONS ccsssssscscccccccccssssscsccscccscesssssesccsccssessesssesecsccsecesescsssesceseceeeeaseenss 15 2 4 1 R5232 Sertal Portas la dasa eed ese hee 15 DAD RS485 Serial Porec ore ebeket lactate a dad ketes 16 CHAPTER THREE OPERATION 0scessdieccceted focecadscdccecedciaddiasceceded cctesatasdcdesed cccdsalevsccesed 18 3 1 POWER UP AND NORMAL OPERATION scccccssececcccssceccassececensescccensesceccaseseecesaeseseeanes 18 3 2 SERIAL AND RADIO DATA sss esete ee iudede ta 18 3 2 1 Character A O a a enekelt l s ose eneket s E eoa e 19 3 2 2 Serial Data Rate Aeon a a e o e ee 20 3 2 3 Radio Data Rate a dietas legates ean 20 3 3 ADDRESSING EA EE E ea a 21 3 4 TRANSPARENT MODE ida 21 3 5 TRANSPARENT MODE REPEATERS ccccccccccccccsssssscecccccessesscssesccsccsssusessceccesssssuuusseesce
29. User Manual WI MOD 9 D Radio Modem Wedimuller 821 Southlake Boulevard Richmond VA 23236 Tel 800 849 9343 Fax 804 897 4134 Web www weidmuller com WI MOD 9 D Radio Modem User Manual v1 9 Thank you for your selection of the WI MOD 9 D radio modem We trust 1t will give you many years of valuable service ATTENTION Incorrect termination of supply wires may cause internal damage and will void warranty To ensure your WI MOD 9 D enjoys a long life double check ALL your connections with the user s manual before turning the power on Caution For continued protection against risk of fire replace the internal module fuse only with the same type and rating CAUTION To comply with FCC RF Exposure requirements in section 1 1310 of the FCC Rules antennas used with this device must be installed to provide a separation distance of at least 20 cm from all persons to satisfy RF exposure compliance DO NOT operate the transmitter when someone is within 20 cm of the antenna operate the transmitter unless all RF connectors are secure and any open connectors are properly terminated operate the equipment near electrical blasting caps or in an explosive atmosphere All equipment must be properly grounded for safe operations All equipment should be serviced only by a qualified technician WI MOD 9 D Manual v 1 9 Page 2 Important Notices FCC Notice This user s manual is for the WI MOD 9 D
30. a response from the slave unit 1t will disconnect the link and reset DCD The check time can be configured using the ATS6 command For example ATS6 10 sets the check time to 10 sec If the slave module does not receive a radio message within the link reset time it will disconnect the link and reset its DCD The link reset time can be configured using the AT T command For example AT T12 sets the link reset time to 12 seconds The link reset time should be larger than the link check time Note that any module can be master or slave the master module for a specific link is the module which initiated the connection by ATD The default for both of these parameters is 0 which disables the link check and link reset function Configuration of Flow Control CTS RTS flow control can be configured This may be desirable to ensure data is not lost if transmitting large amounts of data AT amp K amp KO default Flow Control Disabled CTS Always high Module ignores host s RTS Select for full duplex RS232 with no flow control amp K1 not used amp K2 not used amp K3 CTS RTS Flow Control CTS Reflects the state of the local buffer Module only transmits serial data when RTS is high amp K4 RS 485 Control flow control disabled Must be selected for RS 485 to work CTS is high CTS goes low when transmitting data RTS is ignored Configuration of Error checking Error checking is normally disabled for transparent mode and norma
31. ansparent Mode C Transparent Repeater Controlled C Auto Connect Slave C Single Connect Serial Communications Controlled Mode Options General Advanced Stored Add System Address 136 Unit Address A 7 IV Fast Operation Repeaters will not be used T Low Power Mode ai ci See normally used for auto connect however it can also be used for single connect WI MOD 9 D Manual v 1 9 Page 36 However the host must Chapter Four Configuration In fast operation mode the master and slave modules continually communicate with each other even if there is no data to minimize radio synchronizing time when data is to be transmitted You cannot use repeaters when using the WI MOD 9 D Configuration option Unit address should be less than 15 File Communication Advanced Help Low Power Mode ojelalamle a 2 If Low Power Mode is selected the k Operating Mode Controlled Mode Options module will disconnect the T AAA ee i transparent General Advanced Stored Add communications link and shutdown its Fa Ate receiver circuits if the RS232 DTR signal lala Link Check Time goes to a low or reset state When the DTR Transparent Repeater t m i JI a Auto Connect Master sec u Y Controlled Mode Options Pros Sie For each controlled mode there are some C Single Connect options In the Ad
32. antennas this feature may be used to align the antenna in the correct direction by selecting the peak signal when moving the antenna Setup the remote unit to transmit and observe the signal indication while adjusting the orientation of the antenna A peak in signal level indicates optimum orientation of the antenna 6 2 2 Bit Error Rate Test BER BER may be tested in one direction by typing AT amp TO BER master at the sending unit and typing AT amp T1 BER slave at the receiving unit The sending unit will repeatedly send pseudo random frames and the receiving unit will check these frames for errors If a terminal is connected to the sending unit the pseudo random data is displayed as it is transmitted If a terminal is connected to the receiving unit then the test results are displayed Page 53 WI MOD 9 D Radio Modem User Manual v1 9 An example of the receiving unit s display is here Test Errors Extra Level TotErr TotMissed TotTest 109 0 0 77dBm 3 0 109 kbit Test the sequence number of the last received frame Errors the number of bit errors in the last received frame Extra any extra characters at the end of the frame negative numbers indicate frame dropped out early Level the RSSI level when the frame was received TotErr The total errors received during this test TotMissed The number of missed frames during this test TotTest The total number of bits sent in 1000 s Occasionally during testing the f
33. anual v1 9 Chapter Three OPERATION 3 1 Power up and Normal Operation When power is initially connected to the WI MOD 9 D module the module will perform internal diagnostics to check its functions The following table details the status of the indicating LEDs on the front panel under normal operating conditions On Normal Operation Radio RX GREEN flash Radio receiving data RED flash Weak radio signal Radio TX Radio Transmitting Serial RX GREEN flash Serial Port Receiving RED flash CTS low Serial TX GREEN flash Serial Port Transmitting DCD On Transparent mode always on Controlled mode on when communications link is established DCD Off Communications failure or link not established Other conditions indicating a fault are described in Chapter Six Troubleshooting 3 2 Serial and Radio Data The WI MOD 9 D module provides a full duplex RS232 serial port and half duplex RS485 serial port only one serial port can be used at any one time The radio communications is half duplex this means that the WI MOD 9 D operates at half duplex Many applications use full duplex RS232 communications but do not require full duplex the protocol used operates at half duplex and will operate with the WI MOD 9 D without problems If an application really requires full duplex communications then the WI MOD 9 D should not be used Data input at the serial port is placed into the input buffer This buffer will store 2Kbytes of data a
34. as already been in Open service and you do not know this information then you will need to force the module to factory default settings a using the DIP switches in the module end plate see section 4 7 of this manual Note that when you do this you will lose all of the configuration in the module To read the configuration in a module connect the cable and select the Read Configuration icon on the toolbar To configure a module select the Configure Module icon on the toolbar When you read or configure a program you will see the communication messages between the program and the module in the Serial Communications box in the bottom left hand corner of the program The communication messages are Hayes AT commands being generated or read by the program Saving and Opening a configuration file Configuration details may be saved to disk or read from disk To save a configuration file select the Save icon on the toolbar The program will ask you for a filename and will give a file extension of 05D For example PLC57 05D To open an archived file select the Read icon on the toolbar WI MOD 9 D Manual v 1 9 Page 34 Chapter Four Configuration Modifying an existing configuration If you read a configuration from a module or a saved file the program will display the configuration parameters You can change these parameters and then program the module and or save the file WI MOD
35. ast message received ATS9 and the reason for the communication link resetting in controlled mode ATS12 refer Appendix 1 WI MOD 9 D Manual v 1 9 Page 54 Appendix A Hayes Commands Chapter Seven WARRANTY SERVICE Weidmuller products are warranted to be free from manufacturing defects for a period of 24 months from the effective date of purchase The effective date of purchase is decided solely by Weidmuller This warranty does not extend to failures caused by the operation of the equipment outside the particular product s specification or use of the module not in accordance with this User Manual or abuse misuse neglect or damage by external causes or repairs alterations or modifications undertaken other than by an authorized Service Agent Weidmuller s liability under this warranty is limited to the replacement or repair of the product This warranty is in lieu of and exclusive of all other warranties This warranty does not indemnify the purchaser of products for any consequential claim for damages or loss of operations or profits and Weidmuller is not liable for any consequential damages or loss of operations or profits resulting from the use of these products Weidmuller is not liable for damages losses costs injury or harm incurred as a consequence of any representations warranties or conditions made by Weidmuller or its representatives or by any other party except as expressed solely in this docume
36. at 19200 bits sec with no repeaters will be output approx 44msec after the data is input assuming that error checking is configured There is a special configuration of controlled mode which provides a 5msec lead in time for fast operation see below With the fast operation the time to transmit 20 bytes at 19200 baud is less than 20 msec There are several configurations for controlled mode 3 6 1 Auto Connect Controlled Mode Auto connect mode is similar to fixed line modem operation The master unit wants to connect to only one slave address Normally the slave address is preconfigured On power up the master unit continuously tries to connect to the slave address The slave unit on power up does not try to connect but waits for a connect message Once a connection is made the DCD status at both ends is set and data can be transferred in either direction If there is no data transfer within the preconfigured link check time the master will send a connect message to check the communications link The connection will be broken if a communication failure occurs or if one of the hosts issues a disconnect AT command although this would be unusual for this mode When the master is disconnected it will continuously try to connect to its auto connect address Up to five repeater addresses may be configured as part of the auto connect address That is up to 5 intermediate modules can act as repeaters between the master an
37. axial cable is a common cause for problems with radio systems as it greatly increases the radio losses We recommend that the connection be taped firstly with a layer of PVC Tape then with a vulcanising tape such as 3M 23 tape and finally WI MOD 9 D Manual v 1 9 Page 12 Chapter Two Installation with another layer of PVC UV Stabilised insulating tape The first layer of tape allows the joint to be easily inspected when trouble shooting as the vulcanising seal can be easily removed Where antennas are mounted on elevated masts the masts should be effectively earthed to avoid lightning surges For high lightning risk areas surge suppression devices between the module and the antenna are recommended If the antenna is not already shielded from lightning strike by an adjacent earthed structure a lightning rod may be installed above the antenna to provide shielding 2 2 1 Dipole and Collinear antennas A collinear antenna transmits the same amount of radio power in all directions as such that are easy to install and use The dipole antenna with integral 15 cable does not require any additional coaxial cable however a cable must be used with the collinear antennas Collinear and dipole antennas should be mounted vertically preferably 3 feet 1 metre away from a wall or mast to obtain maximum range 1m minimum A COLINEAR ANTENNA WEATHERPROOF CONNECTORS WITH 3M 23 TAPE SURGE a ARRESTOR NG OPTIONAL C
38. ceive it and output the data If module X can hear the message it will not output it as module X is configured with group address 2 Repeater A will re transmit the radio message but on group address 2 Module S and T will receive the re transmitted message but will not output the message as the group address is now wrong Module X will receive the message and will output the message as the group address is now correct Repeater B will also receive the re transmitted message from A and will output the data as well as re transmit on group address 3 The only other module which is also on group address 3 is repeater C It will accept the message and re transmit it on group address 4 to module Z Note that when a message is transmitted from a remote module the repeaters will only transmit a message in one direction For example Group Address First 1 2 3 Second 2 3 4 Repeaters jan J Bolo gt a i 1 Xx 1 y 1 S 1 1 S r gt A N Remote 1 2 Group Address When X transmits a message repeater A will receive the message on group address 2 Repeater A will not output the data as the group address is not the repeater s first group address Repeater A will re transmit on group address 1 to modules S and T But repeater B will not accept the re transmitted message on group address 1 If repeater B is able to hear the original message from module X on group address 2 then it will re transmit it on But if
39. cessor failure or on failure during startup diagnostics the unit shuts down and remains in shutdown until the fault is rectified 6 2 Test Functions 6 2 1 Radio Testing AT amp Tx To aid in the checking and setup of the WI MOD 9 D unit diagnostic functions are provided using the standard Hayes AT commands To perform the tests you will need a terminal PC hyper terminal set up to match the module same character type and serial speed The table below outlines the functions of the various tests AT amp T Self Tests Allows in field diagnostics and factory testing amp TO Transmit Bit Error Rate Test Generates pseudo random data and sends out radio amp T1 Receive Bit Error Rate Test Receives data from amp TO module and displays BER WI MOD 9 D Manual v 1 9 Page 52 Chapter Six Troubleshooting statistics amp T2 Transmit amp Receive BER Test Used with a second module configured as a transparent repeater amp T3 RSSI Measurement Monitors the received signal strength and displays in dBm Most radio tests are carried out using the AT amp T2 test as this is the easiest to accomplish AT amp T3 Received Signal Strength Display This option provides for testing the radio path between two WI MOD 9 D units Although a pair of units may communicate successfully radio communication may be affected by a range of influences including atmospheric conditions changing landscape degradation of antennas or co axial cable
40. d slave modules 3 6 2 Low Power Auto Connect Mode For special installations the WI MOD 9 D may be operated in a low power condition where it switches off its receiver power consumption is reduced to approx 30 of normal The low power condition will occur if the WI MOD 9 D is configured for auto connect mode AND if the low power mode feature is configured The DTR signal on the RS232 port will control switching between low power and normal operation When DTR is low the module will change to low power operation reset any connected link and switch off its receiver When DTR goes high the module will revert to normal operation and will auto connect to its slave address The use of this low power operation may be applicable in remote locations where there is a limited power supply such as solar panels In this situation the DTR signal from the host device is used to wake up the WI MOD 9 D unit The WI MOD 9 D unit will then operate normally until the DTR signal is reset by the host device 3 6 3 Single Connect Controlled Mode Single connect is similar to a dial up modem In this mode the module will only make one attempt to connect to a destination address A host device will issue a connect AT command and the module will send a connect message to the destination address If the destination module responds then the link is connected and the DCD status is set If the destination module does not respond then the link is not
41. d with a unit address Data is broadcast every other WI MOD 9 D in the system will receive the data and output the data to their individual host devices The user may configure the WI MOD 9 D modems to add error checking to each data packet transmitted if error checking is configured data will not be output if it is received without a correct error check This feature provides additional protection against corruption of the data during the radio transmission If error checking is not configured then the data received by radio will be output without checking for errors WI MOD 9 D Manual v 1 9 Page 8 Chapter One Introduction Transpar ent mode is point to multipoint communications suitable for a host device which is able to communicate on a multi drop bus type network An example of an application is the use of radio modems to extend a PLC RS485 network The serial messages from the PLC s already include PLC addressing and error detection correction to control the flow of data 1 3 Controlled Mode Controlled mode provides point to point communications similar to telephone modems In controlled mode the flow of data is controlled by the WI MOD 9 D units Each WI MOD 9 D unit is configured with an address by the user and a destination address for the data to be transmitted to Data is transmitted addressed to the destination module and only this module will output the serial data The source mo
42. dary address of the repeater Note that the repeater will only output data to its PLC for messages received from the first WI MOD 9 D It will not output data from the right hand PLC If you set both group addresses to 1 then the repeater will output data from both sides this is only possible when there is only one repeater The disadvantage of this is that both sides will hear the re transmitted message thatis the PLC that sent the message will receive the same message back as a re transmitted message This is not a problem with most PLC s but is with a small number of brands For these brands use a different group address either side of the repeater Set the serial data rate to 9600 Set the radio data rate to 19200 Set the character type to 7 1 2 even Set the operating mode to Transparent Repeater Exit and save the configuration Right hand Unit Configuration Set the system address to the same random number Set the group address Set the serial data rate to 9600 Set the radio data rate to 19200 Set the character type to 7 1 2 even Exit and save the configuration ATC4 not necessary default AT amp B13 AT M18L1 AT amp W ATO AT amp S138 AT amp G2 ATC4 not necessary default AT amp B13 AT amp W ATO WI MOD 9 D Manual v 1 9 Page 46 Chapter Four Configuration Controlled Mode Source Repeater Repeater Destination Apart from being a repeater in the 1 3 link 100 is also in a separate lin
43. dio RX LED flashes e Radio TX LED flashes gt e Check system and destination address e If OK check error check e If message okay transmit back an ACK message e Radio RX LED flashes RANES e Radio TX LED flashes e Acknowledgment received okay e Serial data is output communication complete e Serial TX LED flashes Unsuccessful Communications Source Module Destination Module e Listen to ensure channel is clear e If clear transmit message gt e TX LED flashes Receives message RX LED flashes Check system and destination address If incorrect transmit no message and no serial output e No ACK received e Retry up to four times gt e If no ACK message received after five attempts e NO CARRIER message sent to host e DCD signal and DCD LED reset PE HEADER ee ez st DADAS its a lead in system unit repeater dest zero data error check 30msec address addr addrs s addr byte No of bytes 2 1 0 5 1 1 no of data bytes 2 The time for each byte is 0 5msec 19200 bits sec The lead in in fast operation mode is only 5msec If error checking is not configured at the receiving unit data will start to be output approx 1msec after the zero byte has been received If error checking is configured data will be output Page 25 WI MOD 9 D Radio Modem User Manual v1 9 approx 2msec after the end of the message For example a message with 20 bytes of data transmitted
44. ducts Weidmuller products can fail in a variety of modes due to misuse age or malfunction We recommend that users and designers design systems using design techniques intended to prevent personal injury or damage during product operation and provide failure tolerant systems to prevent personal injury or damage in the event of product failure Designers must warn users of the equipment or systems if adequate protection against failure has not been included in the system design Designers must include this Important Notice in operating procedures and system manuals These products should not be used in non industrial applications or life support systems without consulting Weidmuller first 1 A radio license is not required in some countries provided the module is installed using the aerial and equipment configuration described in the WI MOD 9 D Installation Guide Check with your local distributor for further information on regulations 2 Operation is authorized by the radio freguency regulatory authority in your country on a non protection basis Although all care is taken in the design of these units there is no responsibility taken for sources of external interference Systems should be designed to be tolerant of these operational delays 3 To avoid the risk of electrocution the aerial aerial cable serial cables and all terminals of the WI MOD 9 D module should be electrically protected To provide maximum surge and lightning protect
45. dule will add an error check 16 bit CRC to the data transmitted by radio The destination module will process the error check and if correct it will transmit an acknowledgment message ACK back to the source module If the source module does not receive a ACK it will re transmit the data The source module will attempt to transmit the data up to five times until an acknowledgment ACK is received If an acknowledgment is still not received then the DCD signal on the RS232 port will be reset and a alarm message can be sent to the host via the serial port An example of an application using controlled mode would be a radio modem link between an intelligent gas analyzer and a monitoring computer system Intelligent transducers do not normally provide addressing or error checking functions these would be provided by the WI MOD 9 D modules In controlled mode the destination address may be pre set or set on line by the host device using Hayes commands Hayes commands are a standard set of commands used with conventional telephone modems An example of an application that would use Hayes command Page 9 WI MOD 9 D Radio Modem User Manual v1 9 to set destination addresses would be a central computer polling data loggers for periodic information 1 4 Repeater Units A WI MOD 9 D unit may be used as a repeater to re transmit radio messages The purpose of a repeater unit is to extend radio range In transparent mode the
46. dules with fixed signature set to 0 If anew system set to 2 or 3 to separate from other WI MOD 9 D systems in the same area 4 6 Configuration Examples Transparent Mode Extending a PLC Network PLC PLC PLC PLC RS485 RS485 9 6KB 9 6KB WI MOD 9 gt WE MOD 9 _ gt WI MOD 9 RS485 19 2KB 19 2KB 38 4KB REPEATER DATA 7 DATA BITS 1 START 2 STOP EVEN PARITY Left hand Unit Configuration Set the module to factory default settings AT amp F Set the system address to a random number AT amp S138 Page 45 WI MOD 9 D Radio Modem User Manual v1 9 Set the group address AT amp G1 The group address for the left hand side modules has been set to 1 Set the serial data rate to 38400 Set the radio data rate to 19200 Set the character type to 7 1 2 even Exit and save the configuration ATC6 not necessary default AT amp B13 AT amp W ATO The operating mode will already be in transparent mode from the factory default settings The other default values for the other parameters will likely be OK Repeater Configuration Set the module to factory default settings Set the system address to the same random number Set the group address and unit secondary group address AT amp F AT amp S138 AT G1 AT amp U2 The group address for the right hand side module will be set to 2 this corresponds to the secon
47. e WI MOD 9 D module You can also read the configuration from a module to edit The opening screen will show default settings with a random number for the system address Page 33 WI MOD 9 D Radio Modem User Manual v1 9 Reading and Configuring a module You will need a connection AJO MEN cable between the PC and the WI MOD 9 D The cable should have straight through connections as per section 2 4 1 of this manual If your PC only Operating Mode gt Transparent Mode Options Transparent File Communication Advanced Help has USB serial connections with System Address no RS232 port you will need to C Transparent Mode 135 purchase a USB to RS232 pa O s converter cable 9 Transparent Repeater Group Address 1 Select the communications port Controlled that you will be using on the PC make sure that no other program is using this com port Auto Connect Slave The program default is COM1 C Single Connect if you are using a different com port select the Com Port Settings icon from the toolbar and select the com port WI MOD 9 D Configuration Auto Connect Master Group Address 2 V Go On Line On Startup Make sure that the serial data rate and character type is the File Communication Advanced Help same as that already configured in the module If you are configuring a new module then this will be the case If you are configuring a module which h
48. e connected to it An antenna should be connected to the module via 50 ohm coaxial cable eg RG58 RG213 or Cellfoil terminated with a male SMA coaxial connector The higher the antenna is mounted the greater the transmission range will be however as the length of coaxial cable increases so do cable losses For use on unlicensed frequency channels there are several types of antennas suitable for use It is important antenna are chosen carefully to avoid contravening the maximum power limit on the unlicensed channel if in doubt refer to an authorised service provider The net gain of an antenna cable configuration is the gain of the antenna in dBi less the loss in the coaxial cable in dB The maximum net gain of the antenna cable configuration permitted is Country Max gain dB USA Canada 6 Australia New Zealand 0 The gains and losses of typical antennas are Antenna Gain dB Dipole with integral 15 cable 0 5dBi Collinear 3dBd 5 8dBi Collinear 6dBd 8 6 element Yagi 10 9 element Yagi 12 16 element Yagi 15 Cable type Loss dB per 30 ft 10 m RG538 5 RG213 2 5 Cellfoil 3 The net gain of the antenna cable configuration is determined by adding the antenna gain and the cable loss For example a 6 element Yagi with 70 feet 20 metres of Cellfoil has a net gain of 4dB 10dB 6dB Connections between the antenna and coaxial cable should be carefully taped to prevent ingress of moisture Moisture ingress in the co
49. e end of each message These bytes are used to detect any corruption of the data when it is received at another WI MOD 9 D unit When a unit with error check configured receives a radio message it will not output data until it has received the whole message and ensures that the error check is correct If the unit does not have error check configured then it will output data as it is received Hence operation of the units is faster if error check is not configured WI MOD 9 D Manual v 1 9 Page 28 Chapter Three Operation We recommend that units in the same system have the same error check configuration however it is possible for users to configure the units differently If a unit without error check configured receives a message which includes an error check then the unit will treat the additional two bytes as data and output them to the host device If a unit with error check configured receives a message without an error check 1t will treat the last two data bytes as the error check the error check will always be incorrect and no data will be output Error check is strongly recommended for controlled mode operation If error check is not configured then a WI MOD 9 D unit will transmit an acknowledgment message ACK whenever it receives a radio message without checking for errors If error check is configured the unit will only transmit an ACK message if the error check is correct If it is incorrect an error message NACK is retur
50. ed as a transparent repeater RSSI Measurement Monitors the received signal strength and displays in dBm View Current Configuration List the value of all settings as well as S Registers Same as AT amp V Only show settings that are different from the defaults Set module s Unit Address Range 0 127 Default 1 Write Current Configuration to non volatile storage Stored Numbers Up to 4 destination addresses may be stored Format AT amp Zx nn nn nn nn x 0 to 7 nn 1 to 127 AT amp ZO is used for auto connect address Inactivity Timeout Units Seconds Value 0 255 Default 0 disable If there is no radio activity in controlled mode within this time the module resets the connection If used should be larger than the value in S6 S Registers provide a method of storing operational parameters of the module A radio module has different requirements to a telephone module so functions of the S Registers are also different S Registers may be examined using the command ATSn where n is the number of the S Register S Registers may be modified using the command ATSn xx where n is the S Register number and xx is the new value for the register S Registers and functions are listed below No Range Function Comment SO 0 255 Number of attempts before Should normally be set to 1 0 disables answering connection auto answering of calls ATA only message S1 3 255 Escape Sequence Guard Min
51. ed in any controlled mode option but they WI MOD 9 D Configuration ommunication dvanced fost otal tole Operating Mode Transparent Transparent Mode Transparent Repeater Controlled Auto Connect Slave C Sinale Connect Serial Communications Controlled Mode Options General Advanced Stored Add Dest 1 Dest2 Dest 3 Dest 4 1st Stored Destination Address Ditta ileal i Dest Add 1 must have the same system address The repeater addresses are entered in order from the master thatis Rpt 1 is the first repeater after the master You can enter address structures for four slaves Dest 1 to Dest 4 use AT command to select which slave is required Without the use of AT commands the master will only attempt to connect to the address configured in Dest 1 Auto Connect Slave The only configuration required for a auto connect slave module is to enter its unit address Single Connect In single connect controlled mode the host devices use AT commands to select destination addresses to connect to Normally the only configuration required is a unit address Fast Operation Fast operation can be used for any controlled mode however it must be selected for each module It is WI MOD 9 D Configuration ommunication Advanced ojejalelalee Operating Mode Transparent Tr
52. eess 22 Page 5 WI MOD 9 D Radio Modem User Manual v1 9 3 6 CONTROCEED MODE Si iaa 24 3 6 1 Auto Connect Controlled Mode unicidad 26 3 6 2 Low Power Auto Connect Mode iii Ai it 26 3 6 3 Single Connect Controlled Mode 2ssssssg g z ezzeeesz s e er rt s es 26 3 6 4 Fast Operation Controlled Mode it ezze s s r r tes 27 3 0 3 CTS IRTS Flow Control lia 27 00 1imermediate Repeater Sz sz s chy seis lad cies cata ata ec zen Ws Sassen de ees 27 3 7 WHAT OPERATING MODE TO USES dass i ado ae IES 28 3 7 1 Transparent or Controlled Mode dooooococonococinncccnoncnnnonanononaconnncnonnnnnnonnccnonancnonncnnns 28 3 7 2 Emor Check A O A ARO 28 3 8 SERTAL RADIO RATES quid ia eaten lenin ciao eta 29 297 RADIO NTERTERENCES co o Dit NU sa 29 3 100 OPERATING PROBLEMS oval 30 CHAPTER FOUR CONFIGURATION ssccvisdescsvecscedeecedscedscnyecsevecdecaccesvnedevnadecesecesvescessecss 32 4 1 BEFORE CONFIGURING tdi 32 4 2 ADDRESSING iS 33 4 3 DEFAULT CONFIGURATION e d ken n di 33 4 4 CONFIGURATION PROGRAM e does card 33 4 4 1 Transparent MIQUE id ato dese 35 4 4 2 Controlled Modest ir 35 4 4 3 Other A eB a Sadie E O 37 4 5 HAYES COMMANDS qa debia 40 4 6 CONFIGURATION EXAMPLES e dee e a 45 4 7 SWE CHC ONFIGUR ATION gs sz cocth a R nied E E 48 CHAPTER FIVE SPECIFICATIONS osorno arar canina acto gues ccsncetguanycvevecsusestscbeeesvecs
53. eight bit byte without stop or start bits If the input data is 7 data bits then the byte transmitted by radio comprises the 7 bits plus a zero bit Input characters with 8 bits are transmitted as just the 8 data bits with no parity Because the data is transmitted without parity the user may configure CRC error checking to be added to each transmitted data packet Data is output at the destination module based on the character type configured at that module that is the start stop bits and parity is added to the radio data Page 19 WI MOD 9 D Radio Modem User Manual v1 9 3 2 2 Serial Data Rate The communications baud rates supported on both the RS232 serial port and the RS485 serial port are 1200 2400 4800 9600 14400 19200 28800 31250 38400 57600 76800 and 115200 baud the user selects one of these rates during the configuration of the modem 3 2 3 Radio Data Rate The data is transmitted by radio as direct modulated synchronous data at 19200 57600 or 115200 bits second The user must configure the radio data rate at each WI MOD 9 D module The configured radio data rates must be the same for each module in a system At 19200 and 57600 bits sec the WI MOD 9 D adds forward error correction in the transmitted data This is added automatically and is different to the configurable CRC error check The radio range at 19200 baud is better than 57600 or 115200 The expected range at 57600 is 60 of maximum and at 115200 is 30
54. erial rate and S18 the number of bytes required to start The override time is stored in register S19 this value can also be changed by the user 3 9 Radio Interference The WI MOD 9 D operates on the 902 928MHz license free radio band restricted to 915 928 MHz in Australia and 921 928MHz in New Zealand Devices on this radio band must use a spread spectrum technique to allow multiple users to share the band with minimal interference The WI MOD 9 D uses a frequency hopping spread spectrum technique Each time the WI MOD 9 D transmits it uses a different frequency channel in the band The WI MOD 9 D will not interfere or be interfered by radio devices on other bands such as two way radios or wireless telephones There can be interference from other devices on the same band As the hopping sequence used by the WI MOD 9 D is different to other devices on this band the Page 29 WI MOD 9 D Radio Modem User Manual v1 9 probability of two devices using the same channel is small and if this does occur the probability of sharing the same channel on a re transmission is extremely small There is a higher chance of interference from other WI MOD 9 D systems Because WI MOD 9 D are designed to operate in a peer to peer network without a master module directing the communications each WI MOD 9 D will scan the radio band looking for other WI MOD 9 D messages The WI MOD 9 D radio message has a unique signature
55. ermines the hop set for the spread spectrum radio The radio continually changes frequency according to a pre set pattern or hop set There are 8 hop sets The last three bits of the 8 bit system address determines which hop set will be used In USA Canada there is effective radio isolation between hop sets 1 4 and hop sets 5 8 This means that if you have two systems in the same radio range you can select system addresses such that the two systems will not use the same radio channels at the same time If you use system addresses that are exactly different by 4 then you can be sure of this Systems with system addresses 127 and 131 will never use the same radio channels at the same time Also refer to section 3 9 covering radio interference topics 3 4 Transparent Mode In transparent mode radio messages are transmitted without unit addressing Units do not provide handshaking functions to control the flow of data Every unit which receives the radio message and has the correct system and group addresses will output the data Transparent mode operation is effectively a broadcast system Data received at the serial port is transmitted out of the radio port Data received from the radio is transmitted out of the serial port Prior to transmitting units will listen to the radio channel to ensure that it is clear units will hold off from transmitting until the radio channel is clear At the RS232 port the CTS pin can be configured t
56. ese parameters may be used to fine tune and give priority to different WI MOD 9 D units in a system e After each message is transmitted a WI MOD 9 D unit will not transmit another message during the transmit delay time This could be used to allow a reply message to be received before the next message is sent e After a message is received a message will not be transmitted during the receive delay time This could be used to delay a reply message until other messages have been sent menial Pont sctiines WI MOD 9 D Configuration The serial port settings should be selected to match the host Sg SS as device Different port settings may be selected for different Help modules in the same system l a Serial data rate can be selected between 1200 and 115 200 baud If you select a rate which is slower than the radio rate Seg the WI MOD 9 D will automatically set transmission delay pieso PEA aiken parameters in registers S18 and S19 refer section 3 8 a e ve 9600 M 1 M To disable this feature deselect the PLC Mode box DataBits Parity Then there will be no delay data bytes will be transmitted 8 y None y as soon as they appear in the input buffer Peal The number of Data Bits can be selected as 7 or 8 The Rs 485 Hi number of stop bits can be 1 or 2 Parity can be none even Or or odd Flow Control Flow control affects the use of the CTS and RTS signals on the RS232 port These signals can be used t
57. f you select the Low Power option in the Controlled Mode page this selection of DTR will be automatically made DCD Control The DCD signal on the RS232 port can be used to give an indication of communications link status in controlled mode Note that the link is always connected in transparent mode Always On the WI MOD 9 D sets the DCD to be always on Configuration WI MOD 9 D Configuration File Communication Advanced Help Settings Radio Serial Advanced S Reg Baud Rate Stop Bits Data Bits Parity 8 y None y Flow Control s Ignore DTR Paramand Made ia Terminal Read Fl Te WI MOD 9 D Configuration File Communication Advanced Help Settings Radio Serial Advanced S Reg Baud Rate Stop Bits 9600 v fi X Data Bits Parity 8 Md IN one v Flow Control As 485 y Data Terminal Ready DTR Control s Ignore DTA C Command Mode C Command Mode Disconnect Low Power Disconnect Data Carrier Detect DCD Contrat gt Always On Only High When Connected C Pulse Low on Disconnect 4 Only High When Connected the DCD signal will be on when the link is connected and off when the link is reset Page 39 WI MOD 9 D Radio Modem User Manual v1 9 Pulse Low on Disconnect the DCD signal will be normally on but will switch off momentarily for 0 1 sec when the link is reset Advanced Setting
58. ion the module should be connected to a suitable earth and the aerial aerial cable serial cables and the module should be installed as recommended in the Installation Guide 4 To avoid accidents during maintenance or adjustment of remotely controlled eguipment all eguipment should be first disconnected from the WI MOD 9 D module during these adjustments Equipment should carry clear markings to indicate remote or automatic operation E g This eguipment is remotely controlled and may start without warning Isolate at the switchboard before attempting adjustments Se The WI MOD 9 D module is not suitable for use in explosive environments without additional protection WI MOD 9 D Manual v 1 9 Page 4 Important Notices How to Use This Manual To receive the maximum benefit from your WI MOD 9 D product please read the Introduction Installation and Operation chapters of this manual thoroughly before putting the WI MOD 9 D to work Chapter Four Configuration details the configurations available and explains the diverse operation of the product in detail Chapter Five Specifications details the features of the product and lists the standards to which the product is approved Chapter Six Troubleshooting will help if your system has problems and Chapter Seven specifies the Warranty and Service conditions The foldout sheet WI MOD 9 D Installation Guide is an installation drawing appropriate for most applications CONTENTS CHA
59. ission distance the antennas should be raised above intermediate obstructions so the radio path is true line of sight Because of the curvature of the earth the antennas will need to be elevated at least 15 feet 5 metres above ground for paths greater than 3 miles 5 km The modules will operate reliably with some obstruction of the radio path although the reliable distance will be reduced Obstructions which are close to either antenna will have more of a blocking affect than obstructions in the middle of the radio path For example a group of trees around the antenna is a larger obstruction than a group of trees further away from the antenna The WI 1 O 9 x modules provide a test feature which displays the radio signal strength Page 11 WI MOD 9 D Radio Modem User Manual v1 9 Line of sight paths re only necessary to obtain the maximum range Obstructions will reduce the range however may not prevent a reliable path A larger amount of obstruction can be tolerated for shorter distances For very short distances it is possible to mount the antennas inside buildings An obstructed path requires testing to determine if the path will be reliable refer the section 6 of this manual Where it is not possible to achieve reliable communications between two WI I O 9 modules then a third WI I O 9 module may be used to receive the message and re transmit it This module is referred to as a repeater This module may also have a host devic
60. it Address Range 0 127 Default 1 This is also the second group address for transparent repeaters Configuration of Data Rates and Character Type ATB Radio Baud Rate The radio rate must be the same in all modules BO 19 200 baud default B2 115 200 baud Bl 57 600 baud ATC Serial Baud Rate The serial rate can be different CO 115 200 baud Cl 1200 baud C7 28 800 baud C2 2400 baud C8 31 250 baud C3 4800 baud C9 38 400 baud C4 9600 baud default C10 57 600 baud ES 14 400 baud C11 76 800 baud C6 19 200 baud C12 115 200 baud AT amp Bxx Character Type Data bits Stop bits Parity xx is formed by adding the values below Default is 8 data bits 1 stop bit no parity 0 7 Data Bits 0 No Parity 2 8 Data Bits 4 Zero Parity Parity bit always zero 0 1 Stop Bit 8 Odd Parity 1 2 Stop Bits 12 Even Parity For example AT amp B9 will be 7 data bits 2 stop bits odd parity The character type does not need to be the same for all modules in a system Page 41 WI MOD 9 D Radio Modem User Manual v1 9 Transparent mode If you have forced the module to factory default configuration this configuration will not be necessary The following commands can be used to change the configuration to transparent mode AT amp MO amp L1 Transparent repeater AT M18L1 The repeater will use both a primary group address AT amp G and a secondary group address AT amp U Data will be output to the serial port only when received with the
61. it cannot then the message will not be transmitted on to module Z Page 23 WI MOD 9 D Radio Modem User Manual v1 9 3 6 Controlled Mode In controlled mode data is only transferred between two modules that is a point to point link One of the modules is configured as a master unit and the other as a slave unit There can also be up to five intermediate repeaters in the link Each WI MOD 9 D unit is configured with a unit address only the unit with an address matching the destination address of the radio message will process the message and output the serial data To establish a link the master will transmit a special connect message This initial message will not include any data If the slave unit receives the initial message and is not already connected to another WI MOD 9 D unit it will return an acknowledgment message Both units will activate their DCD LED and also activate their DCD signal If the master unit does not receive the acknowledgment the DCD output will reset When the connection is made DCD set the WI MOD 9 D units can transmit data to each other Once the communications channel has been established the WI MOD 9 D unit will accept input data and send radio messages with data When a WI MOD 9 D unit receives a radio message it will check the system address and destination address and also the error check optional If these are correct it will return a ACK acknowledgment message t
62. k to 101 Auto connect link with repeaters Assume that default settings are used for data rates and character types The only configuration required is addressing Module 1 Set the module to factory default settings AT amp F Set the system address to a random number AT amp S217 Set the unit address to 1 AT amp U1 Set the autodial address to 3 via 2 100 AT amp Z0 2 100 3 Set the operating mode to controlled mode auto connect master AT amp M2 amp L2 Exit and save the configuration AT amp W ATO Note that module 1 is the master unit in this link Module 2 Set the module to factory default settings AT amp F Set the system address to the same random number AT amp S217 Set the unit address to 2 AT amp U2 Set the operating mode to controlled mode AT amp M2 amp L3 Note that this module can be configured as any controlled mode except for fast operation Exit and save the configuration AT amp W ATO Module 3 Set the module to factory default settings AT amp F Set the system address to the same random number AT amp S217 Set the unit address to 3 AT amp U3 Set the operating mode to controlled mode auto connect slave AT amp M2 amp L3 Exit and save the configuration AT amp W ATO Page 47 WI MOD 9 D Radio Modem User Manual v1 9 Module 100 Note that 100 is the master unit for a link between 100 and 101 It is also acting as repeater in the 1 to 3 link The system address for 100 and 101 must be the
63. le not in accordance with this User Manual or abuse misuse neglect or damage by external causes or repairs alterations or modifications undertaken other than by an authorized Service Agent Weidmuller liability under this warranty is limited to the replacement or repair of the product This watranty is in lieu of and exclusive of all other warranties This warranty does not indemnify the purchaser of products for any consequential claim for damages or loss of operations or profits and Weidmuller is not liable for any consequential damages or loss of operations or profits resulting from the use of these products Weidmuller is not liable for damages losses costs injury or harm incurred as a consequence of any representations warranties or conditions made by Weidmuller or its representatives or by any other party except as expressed solely in this document Page 3 WI MOD 9 D Radio Modem User Manual v1 9 Important Notice Weidmuller products are designed to be used in industrial environments by experienced industrial engineering personnel with adequate knowledge of safety design considerations Weidmuller radio products are used on unprotected license free radio bands with radio noise and interference The products are designed to operate in the presence of noise and interference however in an extreme case radio noise and interference could cause product operation delays or operation failure Like all industrial electronic pro
64. lly enabled for controlled mode The configurations for transparent and controlled modes above follows this convention However you are able to override this AT amp E CRC Error Checking amp EO Disable CRC Error Checking default SEl Enable CRC Error Checking View Configuration The AT amp V command will output to the terminal a listing of all configuration settings AT amp V Show all settings including S registers amp VO Same as AT amp V WI MOD 9 D Manual v 1 9 Page 44 Chapter Four Configuration amp V1 Only show settings that are different from the defaults amp V10 Display the Stored Non volatile Configuration amp V11 Display the elements of the stored configuration which differ from factory default The WI MOD 9 D has two sets of configuration parameters a set stored in non volatile memory and an active set in RAM memory Normally on start up the configuration is read from the stored memory to the active memory Changes can be made on line to the active configuration which are not stored Transmit and Receive Hold off times Transmit holdoff ATS16 x where x is the delay time in msec 0 255 For example ATS16 200 results in a transmit holdoff delay of 200msec Receive holdoff ATS15 x where x is the delay time in msec 0 255 For example ATS15 80 results in a receive holdoff delay of 80msec Radio Message Signature refer section 3 9 ATS21 0 1 2 or 3 1 is the default value To be compatible with old mo
65. mmunications Successful Unit A Unit B Unit C Unit D Source Repeater Repeater Destination e Transmit gt e Receive message message e Re transmit Ss e Reeve message message e Re transmit Lis e Receive message message Receive ACK Pre e Transmit e Receive ACK e Receive ACK ACK lt e Re transmit e Re transmit e Output data E ACK ACK Repeater units may also act as destination addresses for some transmissions and output data to a host device 37 What Operating Mode to Use 3 7 1 Transparent or Controlled Mode Transparent mode provides simpler operation as the units do not acknowledge transmissions received However reliable operation in transparent mode will only occur if the host devices check the messages and return acknowledgments Generally if a device is able to operate on a RS485 multi drop serial link 1t is suitable for transparent mode Controlled mode is suitable for point to point links For multi point networks a master host device must control connecting and disconnecting to remote units It is possible to configure different units in the same system with different operating modes however the system will not operate A WI MOD 9 D unit configured in one mode will not process a message received from a unit in the alternate mode 3 72 Error Check Error checking may be configured in both transparent and controlled mode When the error check is configured two additional bytes are attached to th
66. nd CTS RTS control can be configured on the RS232 port to prevent overflow WI MOD 9 D Manual v 1 9 Page 18 Chapter Three Operation When the WI MOD 9 D unit detects data in the input buffer it initiates a radio message The radio message will end when the number of transmitted bytes reaches the maximum message length configurable by the user or 1f the input buffer becomes empty If the configured serial data rate is the same or more than the radio data rate then data is transmitted as soon as it enters the input buffer data streams from the input buffer to the radio port If the serial rate is less than the radio rate then the transmission will be delayed for a period to allow sufficient data to build up in the input buffer to avoid the radio emptying the input buffer before a complete serial message has been input The WI MOD 9 D will calculate the amount of delay depending on the difference between the serial and radio rates The radio transmission will stop when the input buffer is empty or when the radio has transmitted the maximum number of bytes user configurable maximum 530 bytes If there is still data in the input buffer the WI MOD 9 D will start another radio transmission If error checking is configured then a 16 bit CRC error check is added to the end of the transmitted data packet The receiving module will receive the full data packet and check the CRC before outputting the data The maximum size of the data
67. ned to the source address 3 8 Serial Radio Rates The WI MOD 9 D will operate most efficiently when the serial and radio data are configured to the same value If the serial data rate is less than the radio rate there is a risk that the radio will empty the input buffer to quickly resulting in a single input message being broken into more than one output messages Many host protocols such as those used by PLC s will not accept a message being broken To avoid this occurring the WI MOD 9 D will automatically delay the radio transmission starting This is called PLC Mode The radio will not start transmitting until a certain number of bytes have been input into the input buffer The WI MOD 9 D calculates the number of starting bytes depending on the values of the configured serial and radio rates The number of bytes to start transmitting is stored in register S18 refer section 4 Configuration when a configuration is entered whereby the serial rate is less than the radio rate the WI MOD 9 D will automatically enter an appropriate value in S18 The user can change this value If the serial rate is the same as the radio rate or more than there is no delay There is an automatic protection if a certain time has elapsed and the number of starting bytes has not been input then the radio will start transmitting This is an override protection The WI MOD 9 D will automatically calculate the override time based on the configured s
68. nless the Hayes command for recording the configuration AT amp W is sent When the configuration changes are made the module must be put back into its operating mode by using the online Hayes command ATO Commands are entered in the format ATxy where x selects the parameter and y the value of the parameter For example ATB2 sets the radio data rate to 115200 baud B selects the radio rate parameter and 2 is the value corresponding to 115200 baud Summary Enter command mode lt 1sec break gt lt 1 sec break Response from WI MOD 9 D OK Enter configuration commands ATxy Response from WI MOD 9 D OK Save configuration AT amp W Exit command mode ATO WI MOD 9 D Manual v 1 9 Page 40 Chapter Four Configuration Note that some commands will automatically exit command mode Several commands can be run together for example ATB28W0 is the same as ATB2 and AT amp W and ATO Prior to Configuration Before configuring a module initially force the module to its factory default configuration either by using the DIP switches refer section 4 3 or by using the AT amp F command If you are making a change to an existing configuration this step is not necessary Appendix A details all of the Hayes commands accepted by the WI MOD 9 D The following commands are the most common Configuration of addressing AT amp S System Address Range 0 255 Default set by factory AT amp G Group Address Range 0 255 Default 1 AT amp U Un
69. normally have a drain hole on the folded element the drain hole should be located on the bottom of the installed antenna Antenna installed with drain holes down Coax feed looped WI MOD 9 D WI MOD 9 D Manual v 1 9 Page 14 Chapter Two Installation 2 3 Power Supply The WI MOD 9 D module is powered by a 10 30VDC or 13 24VAC supply The power supply should be rated at 1 Amp and be CSA Certified Class 2 WI MOD 9 D For DC supplies the negative side of the supply is connected to COM and may be 10 30 gt F connected to ground The supply negative is VDC l connected to the GND terminal internally The positive side of the supply must not be connected to earth The DC supply may be a WI MOD 9 D floating supply or negatively grounded The power requirements of the WI MOD 9 D tenes a units is 80mA at 12VDC or 50mA at 24VDC VAG el The power requirements in low power mode is 20mA at 12VDC 2 4 Serial Connections 2 4 1 RS232 Serial Port The serial port is a 9 pin DB9 female and provides for connection to a host device as well as a PC terminal for configuration field testing and for factory testing This port is internally shared with the RS485 ensure that the RS485 is disconnected before attempting to use the RS232 port Communication is via standard RS232 signals The WI MOD 9 D is configured as DCE equipment with the pinout detailed below
70. nt Full product specifications and maintenance instructions are available from your Service Agent your source of purchase or from the master distributor in your country upon request and should be noted if you are in any doubt about the operating environment for your equipment purchase In the event of your purchase being faulty your warranty extends to free repair or replacement of the faulty unit after its receipt at the master distributor in your country Our warranty does not include transport or insurance charges relating to a warranty claim Should you wish to make a warranty claim or obtain service please forward the module to the nearest authorized Service Agent along with proof of purchase For details of authorized Service Agents contact your sales distributor Page 55 WI MOD 9 D Radio Modem User Manual v1 9 Appendix A Hayes Commands The following details all of the Hayes commands supported by the WI MOD 9 D Default settings are shown by a dot e Command ATA ATB BOe B2 ATC CO Cl C2 C3 C4e C5 C6 ATD ATDSn ATE EO Ele ATH ATI ATO ATQ QUe Q1 Function Answer Incoming Connection message in controlled mode the module can also be set to answer incoming connections immediately or after a certain number of attempts see S Register S0 the default for SO is 1 meaning that the module will normally automatically answer on the first connection attempt If you want to use ATA SO sh
71. o go high while there is space in the input data buffer otherwise it is always high Host devices should provide a suitable protocol to ensure that error checking handshaking and implementation of an appropriate re transmission scheme is provided This mode of operation is particularly suited to devices designed to operate over a multidrop network such as PLC systems designed for operation over a RS 485 network The time taken to transmit a message is Page 21 WI MOD 9 D Radio Modem User Manual v1 9 lead in system group addr data error check if configured ieee An o is no 30msec 2 bytes 0 5ms per byte 2 bytes 1 ms 19 2Kb 19 2Kb lms E 19 2Kb If error checking is not configured at the receiving unit data will start to be output approximately 1 msec after the system address has been received If error checking is configured data will be output approx 2msec after the end of the message For example a message with 20 bytes of data transmitted at 19200 bits sec will begin to be output approx 32msec after the data is input if there is no error checking or 44msec after the data is input if error checking is configured 3 5 Transparent Mode Repeaters A module can be configured as a transparent mode repeater In this mode the module will operate as a normal transparent mode module plus it will also re transmit any radio messages that it receives However it will change the group address in the re transmitted message The t
72. o prevent overflow of the input buffer or output buffer of the WI MOD 9 D The settings should be selected to match the host device The options for this setting are WI MOD 9 D Manual v 1 9 Page 38 Chapter Four None The RTS signal from the host is ignored and the WI MOD 9 D sets the CTS signal always on CTS RTS input buffer flow control the WI MOD 9 D will reset the CTS signal when its input buffer is full presently there is no flow control on the output side if the host resets the RTS signal the WI MOD 9 D will still output data RS 485 must be selected if using the RS485 port the WI MOD 9 D resets CTS when it is transmitting data If you want full duplex operation of the RS232 port then you need to select None or CTS RTS in the RS485 setting default setting the RS232 port will operate in half duplex DTR Control The DTR signal on the RS232 port can be used for different functions in controlled mode Ignore DTR the DTR signal does not perform any function Command Mode if the host resets DTR the WI MOD 9 D will go into command mode when DTR is activated the module will revert to on line mode Command Mode Disconnect as above except that the module will also force a disconnection of the communications link Low Power Disconnect when the host resets DTR the module will disconnect the link and go to low power mode I
73. o the source unit If the system address or destination address is not correct or if the error check is not correct then no return message is sent Establishing a Communications Link Master Unit Slave Unit e Listen to ensure channel is clear e If clear transmit connect gt e Receives message message e Radio RX LED flashes radio es TED nash e Check system and destination address e If OK set DCD LED and output e If message OK transmit back an ACK message e Radio RX LED flashes lt e Radio TX LED flashes e Acknowledgment received okay communication link established e Set DCD LED and output If the source unit does not receive an ACK message it will re transmit the same message It will attempt to transmit the message up to five times If the unit still does not receive an ACK message after five attempts it will reset the DCD LED and reset the DCD output WI MOD 9 D Manual v 1 9 Page 24 Chapter Three Operation During normal operation 1f there has been no radio activity for a period called the link check period the master unit will transmit the connect message to check the radio path The link check period is a time configured by the user Successful Communications Source Module Destination Module e Serial data is received e Serial RX LED flashes e Listen to ensure channel is clear e Receive message e If clear transmit message e Ra
74. ollowing may be displayed Test Errors Extra Level TotErr TotTest Bad Header This indicated that the header information has been corrupted Corrupted headers do not contribute to the bit errors which are calculated only on the 1 000 bit frame BER testing may also be performed in both directions simultaneously In this case a remote module is set up to Transparent mode repeater operation set Group address and Unit address both to 1 and the BER test is performed on the local module using the command AT amp T2 loopback Bit Error Test In this case the display is identical to the display on the BER slave unit above but the displayed bit errors are a total for the round trip so will be the sum of the bit errors in both directions This test is generally the easiest to perform with one person the remote module can be set as a repeater and the full test can then be carried out from the other module During this test disconnect the serial cable to any host device at the repeater The BER test will automatically end if a test time has been entered at S8 register refer Appendix A If S8 has a zero value default the timer is inactive and the BER test will continue until manually stopped The BER test can also be initiated by the configuration switches in the end plate see section 4 7 6 2 3 On line diagnostics Some diagnostic values may be read by a host device using AT commands These values include the radio signal strength of the l
75. ould be set to zero or a larger number Set Radio Baud Rate Radio Baud rates are 19 200 57 600 and 115 200 baud 19 200 baud B1 57 600 baud 115 200 baud Serial Baud Rate selection Automatic Baud Detection control 115 200 baud 1200 baud C7 28 800 baud 2400 baud C8 31 250 baud 4800 baud C9 38 400 baud 9600 baud C10 57 600 baud 14 400 baud Cll 76 800 baud 19 200 baud C12 115 200 baud Connection Dialling Control Dial a specific remote or a stored number Used in single connect controlled mode master module Dial stored number n see AT amp Z for storing numbers Local Echo Control Enable Disable Command Echo Disable Local Echo Enable Local Echo Disconnect link in controlled mode Hang up control Module Identity Firmware version returns the software version number Go to on line operating mode Quiet mode Suppress enable response codes see details of Response Codes later in this section Enable response codes Disable response codes WI MOD 9 D Manual v 1 9 Page 56 Appendix A ATSn ATSn xx ATV VO Vie ATX X00 XI X2 X3 ATZ AT amp Bxx 09 1 0 20 AT amp C amp CO amp Cle amp C2 AT amp D amp DO0e amp D1 amp D2 amp D3 AT amp E amp EOe Hayes Commands Read value from S Register n see description of S registers later in this section Set value of S Register n to xx Verbal Numeric Response Codes Numeric response codes Verbose response code
76. oup address unit address Character type You need to find out the character type of the host devices connected to the WI MOD 9 D units The most common character type is 8 data bits no parity 1 start bit and 1 stop bit Serial Data Rate You need to find out the serial data rate used by the host devices It is possible to have different serial rates configured at different modules in the same system Radio Data Rate You need to decide what radio data rate you wish to use It does not have to be the same as the serial data rate Remember that the radio range for 115200 and 57600 bits sec will not be as good as that for 19200 We recommend that you use 19200 bits sec unless your application requires the faster data rate Operating mode You need to decide which operating mode you wish to use Modes are transparent or controlled auto connect single connect low power mode error checked or no error check These modes are discussed in more detail in following sections The other configuration parameters do not need to be selected and are provided as a means of fine tuning the operation of the WI MOD 9 D units Configuration may be achieved by three different methods 1 Using a Windows configuration program run on a PC This is the most common way of configuring Using Hayes AT commands This method can be performed manually by the user from a PC terminal for example Hyperterminal or can be performed automatically by the host
77. ransparent mode repeater is configured with two group addresses When it receives a radio message with one of these group addresses it will re transmit the message using the other group address assuming that the system address is correct One of the group addresses will be its normal or first group address If a transparent mode repeater receives a message on its first group address it will output the data on its serial port and will also re transmit the message using its second group address That is the re transmitted message will now have the second group address Only WI MOD 9 D modules configured with the second group address will accept the re transmitted message If a transparent mode repeater receives a message on its second group address it will re transmit the message on its first group address but it will not output the data on its serial port Here is an example Group Address First Second 2 Repeaters A n B gt nn Remote Modules X Group Address 1 2 Rh 0 a gt WI MOD 9 D Manual v 1 9 Page 22 Chapter Three Operation Module A B and C are configured as transparent repeaters Module A is configured with group addresses 1 amp 2 module B with group addresses 2 amp 3 and module C with group addresses 3 amp 4 Module S and T are configured with group address 1 only one group address as it is not configured as a repeater When S transmits a message T and A will re
78. re can be an unlimited number of repeaters however with some conditions refer to Section 3 5 The repeater in transparent mode will repeat every transmission it receives PLC WI MOD REG ert 0 REPEATER NX PLC WI MOD RS485 WI MOD In controlled mode up to five repeaters may be configured for any transmission path The repeaters are configured by address zx HOST HOST pd para NO DATA DATA i 2 is 4 WIMOD gt WI MOD 2___ WI MOD __ WI MOD REPEATER REPEATER DESTINATIO HOST HOST sae DATA DATA NO DATA fi 2 la WIMOD gt gt WwIMOD WIMOD __ WI MOD REPEATER DESTINATIO WI MOD 9 D Manual v 1 9 Page 10 Chapter Two Installation Chapter Two INSTALLATION 2 1 General The WI MOD 9 D module is housed in an rugged aluminum case suitable for DIN rail mounting Terminals will accept wires up to 12 gauge 2 5 sqmm in size All connections to the module must be SELV Normal 110 240V mains supply should not be connected to any terminal of the WI MOD 9 D module Refer to Section 2 3 Power Supply Before installing a new system it is preferable to bench test the complete system
79. s Extended Response Codes Allows more detailed response codes including connection speed Basic response codes only X0 Connection Baud rate codes CONNECT 19200 CONNECT 57600 X1 BUSY Message X2 RINGING Message Reset the module and re load the configuration stored in non volatile memory Character Type Data bits Stop bits Parity xx is formed by adding the values below 1 Stop Bit Qe No Parity 2 Stop Bits 4 Zero Parity Parity bit always zero 7 Data Bits 8 Odd Parity 8 Data Bits 12 Even Parity Data Carrier Detect DCD Control DCD is always on in transparent mode DCD Always on DCD High when connected Low otherwise DCD Always on Pulses low on Disconnect 0 1 sec Data Terminal Ready DTR Behavior The host controls DTR This command controls how the module reacts to the state of DTR Module ignores DTR and acts as if it is asserted If the host lowers DTR the module returns to command mode but does not disconnect If the host lowers DTR the module disconnects and returns to command mode If the host lowers DTR the module disconnects and goes to low power mode Raising DTR will cause the module to dial if the leased line settings are correct XLI CRC Error Checking Disable CRC Error Checking Page 57 WI MOD 9 D Radio Modem User Manual v1 9 SEl AT amp F AT amp G AT amp K amp KO amp K1 amp K2 amp K3 amp K4e AT amp L amp LO amp Lie amp L2 amp
80. s These settings may be adjusted if the host device is using AT commands refer to Appendix A for an explanation of the different parameters S Registers These are parameter registers settable by AT commands They do not normally need to be changed Refer to Appendix A for an explanation of these parameters 4 5 Hayes Commands The WI MOD 9 D unit may be configured by a host device using Hayes AT commands Configuration may be done off line by a user with a PC terminal as the host device or it can be done automatically on line by a host device such as PLC or SCADA The AT commands are ASCII messages designed for use with conventional telephone modems Before a WI MOD 9 D unit will accept Hayes commands it must be in command mode A host device may force the unit to command mode by sending a sequence of three escape characters The default escape character is however this may be changed as it is one of the configuration parameters There must be a 1 second break of data before and after the escape sequence The WI MOD 9 D can be configured to start up in command mode or alternately in operating mode It would be normal for the modem to start up in command mode when used in single connect controlled mode Once in configuration mode the WI MOD 9 D unit will accept a string of Hayes commands and the configuration changes made The changes will not however be stored in permanent memory EEPROM u
81. s 50 CHAPTER SIX TROUBLESHOOTING ooocccncocconoosconooscnoocononccosonocosonocononocosoccrnanoseranocananos 52 6 1 DI AGNOSTICSCHART d iii aa A E T A E L A EN 52 6 2 TESTRON ON e da ee oO 52 6 2 1 Radio Testing ATL Ai de 52 6 2 2 Bit Error Rate Test BER Srca aa aaa ia a aa 53 6 2 3 On line diagnostics sieniniai e a isa iieii eg s 54 CHAPTER SEVEN WARRANTY amp SERVICE eeesseessocesocessoccssecssocesocesocsesocessccesocesooseo 55 APPENDIX A HAYES COMMANDS e sseessecesccessocesseessecesocesocesoocssoecssccesocssoosesosesseesseee 56 WI MOD 9 D Manual v 1 9 Page 6 Chapter One Introduction Chapter One INTRODUCTION 1 1 General The WI MOD 9 D radio modem module has been designed to provide flexible and reliable radio modem functions at an economical price Radio modems transmit serial data over a long distance via radio The serial data is not changed the output data is the same as the input data Although the WI MOD 9 D is intended to be simple in its application it also provides many sophisticated features This manual should be read carefully to ensure that the modules are configured and installed to give reliable performance Each WI MOD 9 D module will connect to a host device by RS232 or RS485 serial connection Examples of host devices are PLC s data loggers intelligent transducers and computers The WI MOD 9 D unit can receive data from the host device and transmit this data by radio to another or several W
82. s attempting to connect in controlled mode 2 4 2 RS485 Serial Port The RS485 port provides for communication between the WI MOD 9 D unit and its host device using a multi drop cable Up to 32 devices may be connected in each multi drop network Note that the RS485 port is shared internally with the RS232 port make sure that the RS232 port is disconnected before using the RS485 port As the RS485 communication medium is shared only one of the units on the RS485 cable may send data at any one time Thus communication protocols based on the RS 485 standard require some type of arbitration RS485 is a balanced differential standard but it is recommended that shielded twisted pair cable be used to interconnect modules to reduce potential RFI It is important to maintain the polarity of the two RS485 wires An RS485 network should be wired as indicated in the diagram below and terminated at each end of the network with a 120 ohm resistor On board 120 ohm resistors are provided and may be engaged by operating the single DIP switch in the end plate next to the RS485 terminals The DIP switch should be in the 1 or on position to connect the resistor If the module is not at one end of the RS485 cable the switch should be off WI MOD 9 D Manual v 1 9 Page 16 Chapter Two Installation 1200 1200 WI MOD 9 D OS YOs HOLIMS did RS485 CONNECTION USING TERMINATING RESISTOR Page 17 WI MOD 9 D Radio Modem User M
83. s host device if the received a General Advanced Stored Add message has the first group address Transparent Mode System Address If the transparent repeater receives a C Transparent Repeater 136 message from the second group it will re transmit the message but it will not output the data 9 ect Maste C Auto Comnect Slave Controlled _ Unit Address 2 Fast Operation Repeaters will not be used 4 4 2 Controlled Mode f SingleConnect If you select any of the controlled I Low Power Mode mode options you will be asked to Serial Communications f E select a unit address for the module This should be a unique address for Page 35 WI MOD 9 D Radio Modem User Manual v1 9 that module 1 127 Auto Connect Master In auto connect mode the master will automatically attempt to connect to the slave address Once connected the link can transfer data in either direction with error checking acknowledgement messages and automatic re transmissions if necessary If the link connection fails indicated by the DCD led then the master unit will automatically try to reconnect to the slave At the master unit you need to enter the address of the slave Select the Stored Add page and Dest1 The address of the slave is entered into Dest Add 1 and up to five repeater addresses may be entered Repeater modules may be configur
84. t configuration if this feature is required it must be enabled refer Configuration Chapter 4 If CTS RTS is not enabled then data will be lost after the input buffer 2KB is full 3 6 6 Intermediate Repeaters Where intermediate repeaters are configured each repeater will re transmit the message onto the next address When the destination address is reached the destination module will return an acknowledgment ACK with the reverse address structure as the received message If error checking is selected then the destination module will only return a ACK if the error check is valid If the error check is not valid then no ACK message is returned If the error checking function is not selected then the destination module will return an ACK every time it receives a message Each repeater will re transmit the ACK message until it is received by the source module The source module will calculate a waiting time for the acknowledgment this time is based on the radio baud rate the message length number of bytes and the number of repeaters If the source module does not receive an ACK it will transmit the same message again The WI MOD 9 D will transmit the message up to five times If it does not receive an ACK after the 5 attempt it will assume communications failure and reset its DCD status The unsuccessful message will not be re transmitted and will be lost Page 27 WI MOD 9 D Radio Modem User Manual v1 9 Repeater Co
85. ugh 7 of the serial number so a module with serial number 0804 187 9469 has firmware version 1 87 which has a single fixed message signature while serial number 0105 190 2345 has firmware version 1 90 with configurable message signatures Note If you are adding a new WI MOD 9 D to an existing system with older modules you will need to set configuration register S21 to 0 to make it compatible with the older modules 3 10 Operating Problems Most operating problems relate to an inadequate radio path or radio interference Before installing a system bench test the complete system with the WI MOD 9 D units near each other This test eliminates the radio path or interference as a factor and ensures that the system will operate in the way that you want It is not necessary to connect antennas however a small length of wire should be inserted into the middle pin of the coaxial connector this will act as an antenna If the bench test does not give adequate performance then you need to adjust the configuration parameters We recommend that you do not install the system until you are happy with the bench test performance WI MOD 9 D Manual v 1 9 Page 30 Chapter Three Operation If a system gives poor performance after it is installed check the adequacy of the radio path refer to the Diagnostics Section 6 Interference will only cause a problem if the amplitude of the interference is comparable to the radio signal from the W
86. urrent Drain E 24VDC Radio Transceiver Spread spectrum frequency hopping Transmit power SPECIFICATIONS FCC Part 15 EN 300 683 AS 3548 FCC Part 15 427 AS 4268 2 RFS29 NZ 110 x 185 x 30mm DIN rail mount Removable OK operation Serial RX and TX Radio RX and TX DCD active 40 to 55 degrees C 40 to 70 degrees C 0 99 RH non condensing 10 to 30VDC 13 to 24VAC 80 mA quiescent 20mA low power mode 50 mA quiescent 15mA low power mode 100 channels 16 hop sets 1W 89 336 EEC 902 928MHz 1W 915 928MHz 1W 920 928MHz 1W Powder coated extruded aluminium Suitable for 12 gauge 2 5sqmm conductors Full performance Typical performance Overvoltage and reverse voltage protected During transmission 350mA During transmission 250mA 902 928 MHz USA Canada 4W ERP Australia NZ 1W ERP WI MOD 9 D Manual v 1 9 Page 50 Chapter Five Signal detect RSSI Expected line of sight range Antenna Connector Serial Ports RS232 Port RS485 Port Data rate bit sec configurable Byte format System Parameters Operating modes System address User Configuration Diagnostics 120 to 60 dBm USA Canada Australia NZ Range based on 19200 baud At 57600 baud expected range is 60 at 115200 baud expected range is 30 Female SMA coaxial DB9 female DCE 2 pin terminal block 1200 2400 4800 9600 14400 19200 38400
87. vanced page there are some timing parameters a fy If you enter a Link Check Time then the master unit will send a check message if the check time has elapsed without any data transmissions For example if you enter 10 seconds then if there is a 10 second period without a data transmission then the master module will transmit a check message If the slave does not acknowledge then the master will transmit the check message up to five times If there is still no ACK then the link will be reset DCD reset If you enter an Inactivity Timeout value then the 805U will automatically reset the link if there has been no data transmissions within this time If you use the link check feature you should enter an Inactivity Timeout value to reset the link at the slave unit Settings Radio Serial Advanced 5 Reg WI MOD 9 D Configuration It is a good idea to use these timers as it provides a higher level of security for the controlled mode system except for pat fast operation systems Normally a link check time will C 57600 be entered at the master unit for example 10 seconds and C 115200 a inactivity timeout will be entered at the slave unit for CRC Ener Checking example 15 seconds It is important that the inactivity Disable CRC Error Checking timeout is greater than the link check time C Enable CRC Error Checking A value of zero disables these parameters
88. ved from host while attempting to connect S12 8 Hang up from remote module S13 0 3 Country code for radio not 0 US Canada user configurable at 2 New Zealand 3 Europe S14 0 255 Max Data Packet size transmitted by radio 255 530 bytes S15 0 7 Not Used WI MOD 9 D Manual y 1 9 Page 60 Appendix A S16 0 255 Transmit Hold off Time S17 0 255 Receive Hold off Time S18 0 255 Input buffer delay S19 0 255 Input buffer delay override S20 0 255 Default system address S21 0 255 Radio message signature S18 is calculated as Hayes Commands In msec default 0 In msec default 0 Radio will not transmit until the number of characters in the input buffer 2 x S18 value see below Override time in msec to override S18 delay see below 0 1 20r3 lead in tones SB is serial baud Rate in bits per second SR is serial data Rate in bytes per second usually 1 10 of SB RB is radio baud Rate in bits per second TD is transmit delay 0 028 for transparent controlled mode 0 for fast controlled mode MP is the maximum packet size to be transferred default 1 set to 0 for old systems set to 2 or 3 for new systems suffering interference from other WI I O 9 x_systems S18 MP SR 10 MP RB TD 2 Rounded up NB is the maximum number of bit times delay allowed between characters in the protocol S19 is calculated as S19 1000 NB SB Rounded up Page 61 WI MO
89. ver a wide range of applications The user is able to configure many different parameters such that the WI MOD 9 D unit will connect reliably to different types of host devices Before the radio modem can be used these parameters must be configured Some of these parameters are e Character type the WI MOD 9 D will accept a variety of 7 or 8 data bit characters e Serial Data Rate between 1200 and 115200 bits sec e Radio Data Rate 19200 57600 or 115200 bits sec Page 7 WI MOD 9 D Radio Modem User Manual v1 9 e Operating mode transparent mode or controlled mode The operation of the WI MOD 9 D radio modem is relatively simple As data is received at the serial port the data is transmitted on the radio channel Up to 530 bytes of data can be transmitted in one transmission The radio transmission commences when the first data byte is received and ends when there are no more data bytes in the input buffer or when the number of bytes transmitted equals the maximum message length user configurable default 530 bytes If more than 530 bytes is input the WI MOD 9 D unit will transmit the first 530 bytes then the next 530 bytes and so on until all of the data has been transmitted Because the radio data rate could be less than the input serial data rate an input memory buffer of 2Kbytes is provided The RS232 connection provides CTS control to prevent the buffer overflowing There are no data flow control signals for RS485

User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents