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Elpro 455D Radio Modem user manual

1. RJ 45 E455U D EIA 561 Signal Name Pin Modem Function 1 None Ring Indicator 2 None Data Carrier Detect 3 Input Data Terminal Ready 4 Common Signal Common 5 Output Receive Data from Modem 6 Input Transmit Data to Modem None Clear to Send 8 None Request to Send 2 4 3 RS485 Serial Port The RS485 port provides for communication between the 455U D unit and its host device using a multi drop cable Up to 32 devices may be connected in each multi drop network Switch Up for RS 485 Term 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 Linternaren protocols based on the RS 485 standard require RS 485 Bus 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 1200 1209 RS485 CONNECTIONS Man 455U D Rev 3 00 Page 27 455U D Radio Modem Module User Manual 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 resis
2. RS232 path R 232 path RS232 path 20 1 20 fa 20 21 141 R5485 path R5485 path R5485 path 23 BI O Repeater Settings Repeater Settings JV Repeat Messages to address 0 JV Repeat Messages to address 0 Copy Messages to address 0 5 Vv Copy Messages to address 0 H out serial port out serial port out serial port Hops p g Hops 3 Hops 2 The second ring of repeaters units 21 and 22 need to be configured as above The Hops box is set to 2 repeater after the second hop If unit 21 hears a weak message from unit on the first hop it will not repeat it Note that the address path for return messages is lt 14 1 gt The last ring of units units 36 and 37 need to be configured as above The Repeat Messages to address 0 box is not selected as these units are not required to act as repeaters The Copy Messages serial port box is selected to pass any broadcast radio messages it receives to its host device The Hops box is set to 3 this means that it will only accept messages on the third hop If it hears a weak message transmitted from unit 1 or 14 it will ignore it Page 40 Jan 2007 Chapter Three Configuration Note that the address path for return messages is lt 21 14 1 gt 3 5 4 Multiple Transmissions Units in Unacknowledged mode may be configured to send each message multiple times The number of transmissions is configured in S Re
3. 4 plelalehdelel 455U Configuration Utility File Communication Tools Help Blelalaelelel Modem Connections El System B Unit 1 o Unit Sort Remove dd 7 Save Config Modem Connections Operating Mode Save As Config de eee si E Auto Online Load Config 2 3 Uri2 Single Coni Unit 3 TAcknowledged h EE i Unit 4 Auto Dial erial Communice vas ANEN Single Com Ta ER Ir 455U Configuration Utility File Communication Tools Hel C pleldlapels Remove Unit Ackn Uni BER C E System E Unit 1 Unit 2 Unit 3 Unit 4 Modem Connections Ire 455U Configuration Utility File Communication Tools Help S lo ej Modem Connections Operatin E System Unackne Unit 1 l Aut Unia Sort a Uni 3 Remove Unit 4 Page 35 455U D Radio Modem Module User Manual Using AT commands Connection to the remote modem is accessed using the ATD command on the local RJ 45 configuration port ATDxxx Remote Configuration and Diagnostics Access RJ45 port only ATD3 Access remote diagnostics on station address 3 ATD3 4 5 Access remote diagnostics on station address 5 using stations 3 and 4 as intermediate repeater stations 3 5 Unacknowledged Mode The default setting of the program is Unacknowledged mode refer section 1 Select the system address or use the random val
4. 1dB Another important consideration when installing the antenna system is RF exposure The antenna can radiate a large amount of RF energy Itis important to ensure that a person cannot approach the antennas within the recommended minimum safe distances in the table below Page 22 Jan 2007 Chapter Two Installation Antenna Type Minimum safe distance Dipole 0 4 metres 3dBd Collinear 0 7 metres 6dBd Collinear 0 9 metres 6 element Yagi 1 2 metres 9 element Yagi 1 5 metres 16 element Yagi 2 3 metres Connections between the antenna and coaxial cable should be carefully taped to prevent ingress of moisture Moisture ingress in the coaxial cable is a common cause for problems with radio systems as it greatly increases the radio losses We recommend that the connection be taped with a layer of PVC insulating tape then a layer of vulcanizing tape such as 3M 23 tape with a final layer of PVC insulating tape Where antennas are mounted on elevated masts the masts should be effectively earthed to avoid lightning surges Although the 455U D module is fitted with surge protection additional surge suppression devices are recommended if lightning surge problems are experienced If the antenna is not already shielded lt __1m_ minimum y from lightning strike by an adjacent earthed structure a COLINEAR ANTENNA WEATHERPROOF lightning rod may CONNECTORS WITH be installed
5. 450 MHz 460 450 470 MHz 480 470 490 MHz 500 490 512 MHz Frequency Actual frequency requested in MHz for example 471 0725 for different transmit and receive frequencies enter Rxxxxx TXXxxxxx for example R460 5000 T 472 3000 1 1 1 Basic Operation The operation of the 455U D radio modem is relatively simple As data is received at the serial port the data is transmitted on the radio channel Up to 1020 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 1020 bytes If more than 1020 bytes is input the 455U D unit will transmit the first 1020 bytes then the next 1020 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 up to 8Kbytes is provided The RS232 connection provides CTS control to prevent the buffer overflowing There are no data flow control signals for RS485 1 1 2 Operating Modes A radio channel cannot provide as secure a data channel as a wired connection The 455U D uses a radio band with a low level of natural or industrial noise however there is a chance of interference from other users on the radio channel We recommend that the flow of data over the radio chan
6. Selects how long the transmitter will send a Tail at the end of transmission New data is ignored during the tail time How many times to ret transmit each message in unacknowledged mode Each message is transmitted this number of times The sequence number and source address ensure that repeat messages are ignored by the receiver Number of times to re try in acknowledged mode if no Acknowledge response is received This read Only register indicates radio Tx error flags 1 gt Over temperature Shutdown 2 gt PTT Timeout 4 gt PLL Out of lock 8 gt Antenna failure This read Only register indicates the module temperature 50 units C read Only 0 for off 1 for on This read Only register indicates the voltage at the battery input Units 0 1V This read Only register indicates the voltage at the Supply input Units 0 1V Page 81 WIRELESS SOLUTIONS Q der Contact us for any additional information on these or any other product ranges or je an ot Tel 27 21 762 8995 Fax 4427 21 762 8996 Fax2email 2786 660 0510 Postal address P O Box 24110 Lansdowne Cape Town 7779 Street address 47 Flamingo Crescent Lansdowne Cape Town 7780 info tabateq com www tabateq com find out more information here
7. The trigger conditions for a change over are Complete failure of the active 455U power failure CPU failure Loss of radio communications for a pre configured time radio comms fail Loss of serial communications for a pre configured time serial comms fail 4 Fault detected by internal diagnostics over temperature antenna fault high SWR frequency failed to lock or transmitter PTT timeout Operator request via configuration The 455U units will only change over if the other unit is clear of faults To prevent change over during short term transient fault conditions the trigger condition must be present for a time period before the change over occurs change over delay time user configurable If the primary unit changes over to the secondary unit the secondary unit remains as the active unit until it detects a fault or until it is forced to change by manual configuration The inactive unit continues to operate and can receive messages via the radio and data ports However it is disabled from transmitting messages on the radio and RS485 ports it can transmit messages on the RS232 port Single Host Device If the 455U redundant pair are connected to a single host device they should be connected via RS485 both 455U units will hear all data messages but only the active 455U unit will send REDUNDANT PAIR WITH SINGLE HOST REDUNDANT PAIR WITH REDUNDANT HOSTS USING RS485 USING RS232 Man_455U
8. User Manual 455U D Radio Modem ELPRO Technologies Pty Ltd 9 12 Billabong Street Stafford Q 4053 Australia Tel 61 7 33524533 Fax 61 7 33524577 Email sales elprotech com Web www elprotech com Contents Thank you for your selection of the 455U D radio modem We trust it 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 455U D enjoys a long life double check ALL your connections with the user s manual before turning the power on Important Regulatory Information FCC Part 15 This device has been tested and found to comply with the limits for a Class B digital device pursuant to Part15 of the FCC rules Code of Federal Regulations 47CFR Part 15 Operation is subject to the condition that this device does not cause harmful interference This device has been type accepted for operation by the FCC in accordance with Part90 of the FCC rules 47CFR Part 90 See the label on the unit for the specific FCC ID and any other certification designations Industry Canada RSS 119 This device has been type accepted for operation by Industry Canada in accordance with RSS 119 of the Industry Canada rules See the label on the unit for the specific Industry Canada certification number and any other certification designations Notice Any changes or modifications not expressly approved by ELPRO Technologies
9. 0 255 0 255 0 255 0 255 0 255 0 255 0 255 0 255 0 255 0 255 Page 80 User Manual BUSY response from remote modem on dial request Character received from host while attempting to connect Hang up from remote modem Spare Function Max Packet 0 1020 bytes Break Length Not Implemented Transmit Hold off 0 12 75 Sec Receive Hold off 0 12 75 Sec RS 232 Serial Rx Buffer Threshold RS 232 Serial Rx Timeout RS 485 Serial Rx Buffer Threshold RS 485 Serial Rx Timeout Default System Address High Byte Default System Address Low Byte Not Implemented Max Packet size S14 x 4 Default 255 Minimum time to send BREAK signal Units 20 milliseconds How long to disable transmitting after transmitting a message Units 50 milliseconds How long to disable transmitting after receiving a message Units 50 milliseconds This register indicates the number of characters to be received into the RS 232 serial receive buffer before beginning radio transmission default 0 If there is data in the RS 232 serial receive buffer and no data is received on the serial port for this time radio transmission will begin regardless of the setting of S18 A value of zero disables the timeout so the modem will not transmit until there are at least S18 characters in the receive buffer This register indicates the number of characters to be received into the RS 485 serial r
10. These values include the radio signal strength of the last message received ATS9 and the reason for the communication link resetting in Acknowledged mode ATS 12 refer Appendix C Diagnostic registers are Man 455U D Rev 3 00 Page 59 455U D Radio Modem Module User Manual S Register Meaning S9 Radio signal strength of last radio message received S12 Reason for radio link resetting in Acknowledged mode refer App C for codes 31 Radio Flags 0 for All OK Otherwise some Radio faults The fault code is generating by adding the following numbers 1 indicates Radio shutdown from over temperature 2 indicates Radio shutdown due to PTT Timeout 4 indicates radio Phase Locked Loop failed to lock 8 indicates SWR fault Antenna missing or faulty 32 Module Temperature Subtract 50 to get temp in deg C 33 State of Digital VO point or status of Dual Redundancy system 34 Battery Input Voltage Units 0 1 Volt 35 Supply Input Voltage Units 0 1Volt 0 25 5 Volts The diagnostic information can be viewed using the configuration program while the 455U D is online by connecting via the secondary RJ45 RS232 port The information is displayed under the Radio Stats tab on the right hand side and the information refreshed read from the connected module by selecting the Reload Radio Statistics icon on the Toolbar Page 60 O Jan 2007 Chapter Four Troubleshooting 455U Configuration
11. This is normally the case Man 455U D Rev 3 00 Page 49 455U D Radio Modem Module User Manual DNP3 The end of the DNP protocol frame is indicated by a period of no data transmission equal to the configured timeout for that serial port Configured in S19 for the RS232 port and in S21 for the RS485 port 3 11 Advanced Settings S Registers These are parameter registers settable by AT commands or the Configuration software to fine tune the operation of the 455U In most applications they do not need to be changed Refer to Appendix C for an explanation of these parameters 3 12 Hayes AT Commands The 455U 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 455U D unit will accept Hayes commands it must be in command mode The RJ 45 configuration port is always in command mode The DB9 RS 232 port needs to be set to command mode if the modem is currently communicating 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
12. address 15 This command sets the repeater to 200 msec hold off Slave Repeater station address 21 AT amp MO Configure mode 0 Unacknowledged mode AT amp L Go directly online at startup AT amp 21 Set Modem s address to 21 AT amp Z0 14 1 Set all data to go through address 14 to master station address 1 AT amp R3 AT amp H2 Set Broadcast Repeater mode Repeat wildcard messages on their second hop and send these messages out the serial port Page 52 Jan 2007 Chapter Three Configuration ATS17 4 Set the receive hold off This ensures that the repeated messages from the repeaters don t clash with responses from the directly communicating device address 15 This command sets the repeater to 200 msec hold off Slave devices Site address 36 AT amp MO Configure mode 0 Unacknowledged mode AT amp U36 Set Modem s address to 36 AT amp Z0 21 14 1 Set all messages to go to master station address 1 via repeaters 21 and 14 AT amp R2 AT amp H3 Send wildcard messages on their third hop out the serial port 3 14 Switch Configuration Factory default configuration may be restored to the modem by setting the DIL switch on the end plate to Default setting This will not change the configuration settings in non volatile memory but will set the volatile configuration to factory default settings This is equivalent to entering the command AT amp F to the modem To restore Factory defa
13. D Rev 3 00 Page 29 455U D Radio Modem Module User Manual messages Redundant Host Pair If the host device is duplicated as a redundant pair with an individual host connected to an individual 455U then RS232 should be used the 455U will receive and send serial messages however only the active 455U will transmit via the radio Dual Redundanct Control Connection The DIO channels on the two units are connected this connection forms the Dual Redundant Control Connection Note The DIO channel is not available for any other purpose when the 455U unit is connected to a redundant module If the Dual Redundant Control Connection becomes disconnected then the two units will remain in their previous active in active state Redundant units should be connected to separate power supplies and must be connected to separate antennas and coaxial cables Although only one antenna will transmit at any one time care must be taken with the installation of the two antennas to avoid one antenna affecting the radiation pattern of the other The antennas should be installed at least 2 metres 6 feet apart TYPICAL REDUNDANT WIRING INSTALLATION TZ Power Earth Supply 24V 24 12 PRIMARY 0 455U REDUNDANT CONTROL CONNECTION A A Power Supply 24V SECONDARY 455U RS485 CONNECTION TO HOST DEVICE Page 30 O Jan 2007 Chapter Three Configuration Chapter Three CONFIGURATION 3 1 Before Configuring Configuration compr
14. RS485 port on this unit use address 135 12847 Addresses 0 and 128 are reserved as wildcard addresses Sending a message to address 0 results in all modules accepting the message and outputting via the RS232 ports Address 128 is the wildcard address for every RS485 port in the system Every modem can also act as a repeater unit for other modems in the system If the modem is expected to repeat messages to the wildcard address the repeater mode should be selected to wild card in the configuration 3 1 2 Command Mode The 455U can be either in Command mode or Online Command mode is a mode in which the 455U stops its normal operations and is waiting to accept AT commands from the host device AT commands are a standard set of modem commands use to configure or control the modem s operations The 455U can be configured to power up in either command mode or online online is the default setting 32 Default Configuration The default configuration of the 455U D is Unacknowledged mode no error check no CTS RTS flow control serial rate 19200 radio rate 4800 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 3 3 Configuration Program The configuration program is Cfg_455U D This program will run under Windows XP 98 NT or 2000 The program may be obt
15. and location of antennas the degree of radio interference and obstructions such as hills or trees to the radio path The expected range for radio data rates of 4800 bits sec is up to 60km 40 miles depending on installation site and path terrain The expected range at 19200 bits sec with 25KHz bandwidth or 9600 bit sec with 12 5KHz is up to 30 km 20 miles line of sight Where it is not possible to achieve reliable communications between two 455U D modules then a third 455U D module may be used to receive the message and re transmit it This module is referred to as a repeater An antenna must be connected to each 455U D module using the female SMA connector at the top of the module To achieve the maximum transmission distance the antennas should be raised above intermediate obstructions such that the radio path is true line of sight Because of the curvature of the earth the antennas will need to be elevated at least 5 metres 15 feet above Man 455U D Rev 3 00 Page 21 455U D Radio Modem Module User Manual ground for paths of 5 km 3 miles For short distances the modules will operate reliably with some obstruction of the radio path Obstructions which are close to either antenna will have more of a blocking effect than obstructions in the middle of the radio path For example a group of trees around the antenna is a large obstruction and the antenna should be raised above the trees However if there is at least 100
16. be sent and how to get there An error check 16 bit CRC and security encryption AES128 may be configured by the user Up to 1020 bytes of data may be transmitted in a message the maximum message size is configurable between 1 and 1020 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 1f configured Page 16 O Jan 2007 Chapter One Introduction The time taken to transmit a message is Section Item Number Time At 9600 Baud PEAMBLE Lead in 40 msec Default 40 msec Configurable HEADER System Address 2 Bytes 2 08 msec Header Control 2 Bytes 2 08 msec Source Address 1 Byte 1 04 msec Destination Address 1 Byte 1 04 msec Intermediate Address 1 Byte per address 1 04 msec for each address Header Error Check 1 Byte 1 04 msec ENCRYPTION Initialisation Vector 16 Bytes if enabled 16 64 msec If configured DATA Message Data Data Bytes 1 04 msec x no of data bytes CHECK CRC Error Check 2 bytes if enabled 2 08 msec If CRC configured The time for each byte is 1 04msec 9600 bits sec 2 08 msec at 4800 bits sec and 4 16 msec at 2400 bits sec If error checking is not configured at the receiving unit data will start to be output immediately after the first data byte has been received If error checking is configured data will be output approx Imsec after the end of th
17. from low power shutdown by plugging a configuration cable to the CONFIG port with DTR line connected 3 10 Optimum Path Routing Optimum Path Routing OPR provides support for various host protocols This mode uses knowledge of the host frame format to ensure that a full packet of information is sent over the radio in a single transmission The host message is examined and the destination address is extracted from the message This is used to look up the protocol routing paths AT amp P command configure these routing paths Optimum Path routing is available in firmware version 3 00 and later Page 48 Jan 2007 Chapter Three Configuration To use OPR select Use Host Protocol in the Operating Mode section of the Host Protocol Mode Paths configuration screen Select the host Use Host Protocol protocol type in the drop down box below ial Modbus ASCII or RTU DF1 or DNP3 DF1 Path Configuration When Use Host Protocol is selected you can click the Paths button to access the routing paths configuration Routing paths allow you to enter the path through the network to use when the matching host protocol address is detected as the destination address in the host protocol frame The following example will send messages to protocol address 1 to the modem with address 11 via modem 10 as a store and forward Messages to address 12 are sent to modem address 12 using modems 10 and 11 as
18. in register amp Z1 Messages on the RS 232 port are sent to the address dialed from the command line or configured in the auto dial register amp ZO Acknowledged mode This mode simulates telephone modems with a single connection being made to a remote modem in the system and each message is acknowledged before more data is sent If no Acknowledgement is received the message is re transmitted Modbus RTU Mode Modbus ASCII Mode DFl1 Protocol O Jan 2007 Appendix A Hayes AT Commands amp MS DNP3 Protocol AT amp N Abort Connection Control Controls whether the modem will abort a connection attempt if a character is entered This item is only meaningful with the acknowledged mode of operation amp NO Ignore characters entered while attempting to make a connection amp Nie Ifa key is hit while attempting to connect abort the connection attempt and return to command mode AT amp P Protocol Routing Paths Up to 100 paths can be stored Routing paths are used in conjunction with host protocol specific routing so that device addresses may be extracted from the data frame and used to direct the message Each path consists of a destination address extracted from the protocol frame a radio destination address and up to 6 store and forward addresses Format 1 AT amp Pxx a a n f xx 0 to 99 a 0 to 65535 depending on protocol n 0 to 127 fP 0 to 255 This indicates the path to sen
19. modem then the system will not operate It may be possible to lengthen the response time in the host software 4 4 Test Functions 4 4 1 Bit Error Ratio Test BER BER may be tested from the Configuration program or from a terminal using AT commands Using Configuration Program To carry out a BER test follow the instructions in section 3 4 to associate with a remote modem Note that host devices should have communications paused during the BER test Right click on the connection in the left hand menu and select BER The local modem will repeatedly send pseudo random frames and the receiving unit will check these frames for errors The receiving unit returns a response message indicating how many if any errors were found Each test takes approx 1 second which means the results will be updated every second Test the sequence number of the last received pseudo random data 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 Man 455U D Rev 3 00 Page 57 455U D Radio Modem Module User Manual Using AT Commands BER may be tested by typing AT B Slave Address The sending unit will repeatedl
20. modem to transmit encrypted messages and to receive both encrypted and unencrypted messages Forced on RX causes the modem to transmit encrypted messages and only accept messages which are encrypted Note that the encryption keys must be set up in each modem to the same values to allow the modem to decrypt encrypted data correctly If incorrect encryption keys are entered the data will be forwarded out the correct port but will not be correctly decrypted at the receiver To set the security key connect to the modem locally and use the configuration software or using AT commands enter the command AT S Note that the security key can not be changed remotely DTR Control The DTR signal on the RS232 port can be used for different functions Ignore DTR the DTR signal does not perform any function Command Mode if the host resets DTR the 455U 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 If you select the Low Power option in the Acknowledged mode page this selection of DTR will be automatically made refer to the Low Power Mode section of this manual Page 42 Jan 2007 Chapter Three Configuration DCD Cont
21. normally the primary modem unless the primary modem detects a fault in which case the secondary modem becomes active To check the state of the Dual redundant system you can e Observe the DIO LEDs on the two modules These LEDs should be flashing together Refer to the following table to diagnose the flashing LEDs LED Sequence Redundancy Status 1 seconds on Y2 second off Normal operation Primary is active Secondary is inactive but functional 1 second on 1 second off Secondary Fault Primary is active Secondary is inactive and has a fault Y second on 2 seconds off Secondary is active Primary is inactive and has a fault Always On Hardware fault on I O Circuit or module fault disconnect wire to determine which module is functional e Use the configuration port to read the status of S Register S 33 to check the dual redundancy status S33 Value Dual Redundant State 2 Active Primary Active Secondary Active Primary no secondary detected Inactive Primary Inactive Secondary Nn BW Page 64 Jan 2007 Chapter Four Troubleshooting e Use the configuration port to force a changeover from secondary active to primary active or from primary active to secondary active to force a changeover from primary to secondary use command AT O5 to force a changeover from secondary to primary use the command AT O6 the status of the Dual Redundant system is displayed in register S33 The fol
22. the local buffer AND the remote RTS input The modem only transmits serial data when RTS is high RTS input is transferred to the remote modem Note Currently not implemented Behavior is as for amp K3 CTS RTS Flow Control CTS Reflects the state of the local buffer Modem only transmits serial data when RTS is high XON XOFF Flow Control Modem uses XON Hex value 0x17 and XOFF Hex value 0x19 to control flow of information between modem and host Fixed line Mode Control Allows configuration for answer originate or command mode Normal Mode At power up the modem enters command mode and waits for commands Fixed line mode For Acknowledged mode ATD automatically dials the number stored in ZO ATA answers an incoming call For Unacknowledged modes the modem automatically goes online and sends messages to the modem configured in ZO Fixed line Answer mode The modem continuously attempts to answer any incoming call Use DTR with the AT amp D command to control the connection This mode is only allowed when operating in Acknowledged mode Operating Mode This allows selection between unacknowledged and acknowledged mode Unacknowledged Mode All serial data is sent to the configured destination address In ZO or specified in a dial command No Acknowledgement is required and broadcast messages are allowed by using the wildcard address 0 In this mode Messages on the RS 485 port are sent the address configured
23. to the Diagnostics Section 4 4 Interference will only cause a problem if the amplitude of the interference is comparable to the radio signal from the 455U 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 unacknowledged mode try Acknowledged mode e If configured for a radio data rate of 9600 bits sec reduce the rate to 4800 bits sec Page 56 Jan 2007 Chapter Four Troubleshooting 455U Configuration Utility e If lar ge r adio File Communication Tools Help Bit Error Rate EEN an oleaje 2 Test Err xtra Level being Modem Connections Operating Mode transmitted E System Ee 32 0 lo 82d8m B Unit 1 O gt reduce the me 9 ae oa TotalError Missed Test Total Unity Sort C Single Coni max mum Uni Remove EE lo i 33x 1000 z 1000 uni MI C Auto Dial message length and transmit the data in more messages of smaller size Associate A O Auto Answ C Single Com 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
24. 00 bits second 19200 baud only operates with 25KHz channel widths The user must configure the radio data rate at each 455U D module The configured radio data rates must be the same for each module in a system The 455U D uses four level frequency modulation for the highest data rates 9600 b s for 12 5KHz channels and 19200 b s for 25KHz channels The other rates use two level frequency modulation Two level modulation results in less data errors resulting in more reliable operation It is recommended that radio rates of 4800 12 5KHz or 9600 25KHz be used unless the application requires the higher data rates 1 5 5 Radio Message The radio message includes the following e A40 msec leading sequence of alternating 1 s and O s provides the receiving unit with time to capture and lock onto the incoming signal the lead in time can be configured to be longer for systems using talk through repeaters e Asystem address is superimposed on each message to provide discrimination between different 455U D systems on the same radio channel Each 455U D unit in the same system must be configured with the same system address refer Configuration section Although other 455U 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 Addressing for the sending unit any repeater units and the final destination unit indicates where the message is to
25. 0mA synthesized fixed band 12 5 20 or 25KHz Low power version Four levels 500mW 100mW 25mW and 10mW FCC Part 15 RSS 119 AS 4768 1 FCC Part 90 AS4295 Powder coated aluminum DIN rail mount Suitable for 2 5sqmm 12 gauge conductors Full performance Reduced performance Reverse current protected Overvoltage and reverse voltage protected Provides Battery charging features from main supply During transmission 450mA lt 0 5W 800mA 1W 1 25A 2W 2A SW 380 520 MHz In 20 MHz bands High power version Four levels 5W 2W 1W and 0 5W Jan 2007 Chapter Five Receive Sens BER 10 12 5KHz channel Signal detect RSSI Expected line of sight range SW Lightning surge protection Antenna Connector Data Serial Ports RS232 Port RS485 Port Data rate bit sec configurable Byte format Configuration Serial Port RS232 Port Diagnostics Man_455U D Rey 3 00 Specifications 106 dBm 9600 Baud 112 dBm 4800 Baud 114dBm 2400 Baud 116 dBm 1200 Baud 120 to 60 dBm 30 km 19200 baud Range may be extended by up to 25Khz 6 intermediate modules as 35 km 9600 baud repeaters 12 5Khz 60 km 4800 baud Internal gas discharge arrester Female SMA coaxial DB9 female DCE RTS CTS DTR DCD hardware signals provided 2 pin terminal block Maximum distance 1 2 km 600 1200 2400 4800 9600 14400 19200 28800 31250 38400 57600 76800 93750 115200
26. 12 Jan 2007 Chapter One Introduction If the source unit does not receive an ACK message it will re transmit the same message It will attempt to transmit the message the configured number of times S Register S30 If the unit still does not receive an ACK message after the configured number of attempts it will reset the LINK LED and reset the DCD output on the DB9 RS232 port and reset the DIO output if configured During normal operation if there has been no radio activity for a period called the link check period the master unit will transmit a check message to check the radio path The link check period is user configurable S Register S6 If the slave doesn t receive any messages within the configured link check timeout Configuration Setting T it will drop the radio link and turn off the LINK LED and reset the DIO and DCD signals if configured Successful Communications Source Module Destination Module Serial data is received Serial LED flashes Listen to ensure channel is clear If clear transmit message Radio TX LED flashes Radio RX LED flashes Acknowledgment received okay communication complete Unsuccessful Communications Source Module Listen to ensure channel is clear If clear transmit message TX LED flashes No ACK received Retry multiple times Configure With S Register S30 If no ACK message received after all attempts NO CARRIER message sent to host DCD s
27. 187500 7 or 8 data bits Stop start parity bits configurable RJ45 EIA561 9600 baud 8 n 1 OK led Low signal receive led CTS RTS indication Online Link Status RS232 activity RS485 activity Radio Transmit RSSI measurement in BER test dBm Page 67 455U D Radio Modem Module User Manual Chapter Six WARRANTY amp SERVICE We are pleased that you have purchased this product ELPRO products are warranted to be free from manufacturing defects for the serviceable lifetime of the product The serviceable lifetime is limited to the availability of electronic components If the serviceable life is reached in less than three years following the original purchase from ELPRO ELPRO will replace the product with an equivalent product if an equivalent product is available 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 ELPRO 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 ELPR
28. 232 port These signals can be used to prevent overflow of the input buffer or output buffer of the 455U D The settings should be selected to match the host device The options for this setting are None The RTS signal from the host is ignored and the 455U D sets the CTS signal always on CTS RTS input buffer flow control the 455U D will reset the CTS signal when its input buffer is full Man 455U D Rev 3 00 Page 41 455U D Radio Modem Module User Manual XON XOFF the modem uses the XON and XOFF symbols to control flow of data This protocol should not be used with raw binary data as the raw data may contain the XON and XOFF characters This flow control method is only suitable for use with ASCII data 3 6 3 Other Settings Select the Modem tab CRC Error Checking for transmitted messages It is normal for error checking to be disabled for Unacknowledged mode and enabled for Acknowledged However you can select either for either mode and separately select for the RS 232 port and the RS485 port The modem is always able to receive messages both with and without error checking so different modems in the system may be configured with different error checking options Security Encryption Data Encryption may be set to Disabled setting allows the modem to receive both encrypted and unencrypted messages but the modem will only transmit unencrypted messages Enabled on TX causes the
29. 232 port on unit 7 use address 7 To access the RS485 port on this unit use address 135 128 7 Addresses 0 and 128 are reserved as wildcard addresses Sending a message to address O results in all modules accepting the message Address 0 refers to every RS232 port in the system Address 128 is the wildcard address for every RS485 port in the system 1 6 1 Multiple Device Connectivity MDC Man 455U D Rev 3 00 Page 17 455U D Radio Modem Module User Manual Because each serial port is individually addressed the 455U D is able to connect to two serial devices and manage two independent wireless links This is called Multiple Device Connectivity or MDC functionality Some of the features if MDC are e Each serial port is configured MULTIPLE DEVICE CONNECTIVITY individually however with the same system address e The device connected to the RS485 port can link to the RS485 port or the RS232 port on another 455U D the same applies to the RS232 device However if a wild card address is used 0 or 128 then all remote serial ports must be the same that is all R485 or all RS232 e The RS485 port always operates in Unacknowledged mode The RS232 port can be in Unacknowledged or Acknowledged mode The DCD status indication will relate to the RS232 port e Each wireless link can include repeater addresses e Because both communications channels use the same radio channel activity on one port may impact communica
30. D Radio Modem Module User Manual This example incorporates a single station connected to Master host device Address 1 two repeater stations with connected slave host devices Addresses 14 and 21 and a remote stations with a connected slave host device Address 36 This example uses Auto Online mode which routes all messages according to the path set with the amp Z0 command The path set with amp Z0 command is configured to broadcast to the entire system The host protocol is packet based with message packets of up to 100 bytes The master station initiates all communication and waits for a response from the slave devices Master Host site Modem configuration AT amp MO Configure mode 0 Unacknowledged mode AT amp L Go directly online at startup AT amp UI1 Set Modem s address to 1 AT 2Z0 0 0 0 Set all messages to go to the wildcard address and repeat twice Slave Repeater station address 14 AT amp MO Configure mode 0 Unacknowledged mode AT amp L Go directly online at startup AT amp 14 Set Modem s address to 14 AT amp ZO0 1 Set all messages to go directly to master station address 1 AT amp R3 AT amp H1 Set Broadcast Repeater mode Repeat wildcard messages on their first hop and send these messages out the serial port ATS17 4 Set the receive hold off This ensures that the repeated messages from the repeaters don t clash with responses from the directly communicating device
31. Detect DCD Control DCD Always on Jan 2007 Appendix A Hayes AT Commands amp Cle DCD High when connected Acknowledged Mode or when online Unacknowledged mode Low otherwise amp C2 DCD Always on Pulses low on Disconnect Acknowledged Mode or on Hangup Unacknowledged mode AT amp D Data Terminal Ready DTR Behavior The host controls DTR This command controls how the modem reacts to the state of DTR amp DOe Modem ignores DTR and acts as if it is asserted amp DI If the host lowers DTR the modem returns to command mode but does not disconnect amp D2 If the host lowers DTR the modem disconnects and returns to command mode amp D3 If the host lowers DTR the modem disconnects and goes to low power mode Raising DTR will cause the modem to dial if the fixed line settings are correct amp L1 AT amp E CRC Error Checking amp EOe Disable CRC Error Checking amp E1 Enable CRC Error Checking for RS 232 port amp E2 Enable CRC Error Checking for RS 485 port amp E3 Enable CRC Error Checking for both RS 232 and RS 485 port AT amp F Restore Factory Defaults This function is also available from the external DIP Switch AT amp H Broadcast Repeater Hops Setting Set the number of hops for a message to activate the broadcast repeater function AT amp R amp HOe Don t repeat messages to the Wildcard address and don t copy repeated messages out the local serial port regardless of the AT amp R se
32. O is not liable for any consequential damages or loss of operations or profits resulting from the use of these products ELPRO is not liable for damages losses costs injury or harm incurred as a consequence of any representations warranties or conditions made by ELPRO or its representatives or by any other party except as expressed solely in this document 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 unlikely 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 This warranty does not indemnify the purchaser of products for any consequential claim for damages or loss of operations or profits Should you wish to make a warranty claim or obtain service please forward the module to the nearest authorised Service Agent along with proof of purchase For details of authorised Service Agents contact your sales distributor Page 68 Jan 2007 Appendix A Hayes AT Commands Appendix A Hayes Commands The following details all of the Hayes commands supported by the 455U D Default settings are show
33. P L could void the user s authority to operate this equipment To operate this equipment legally the user must obtain a radio operating license from the government agency This is done so the government can coordinate radio users in order to minimize interference Man 453U D Rev 3 00 Page 3 455U D Radio Modem Module User Manual How to Use This Manual To receive the maximum benefit from your 455U D product please read the Introduction Installation and Configuration chapters of this manual thoroughly before putting the 455U D to work Chapter Four Specifications details the features of the product and lists the standards to which the product is approved Chapter Five Troubleshooting will help if your system has problems and Chapter Seven specifies the Warranty and Service conditions The foldout sheet 455U D Installation Guide is an installation drawing appropriate for most applications WARNING 1 To avoid the risk of electrocution the antenna antenna cable and all terminals of the 455U D module should be electrically protected To provide maximum surge and lightning protection the module should be connected to a suitable earth and the antenna antenna cable and the module should be installed as recommended in the Installation Guide 2 To avoid accidents during maintenance or adjustment of remotely controlled eguipment all eguipment should be first disconnected from the A55U D module during these adjustments Eguipmen
34. P450L radio detected 10 mW to 500 mW 400 MHz band Radio P450H P450H radio detected 0 5W to 5W 400 MHz band Radio P150H P150H radio detected 0 5W to 5W 150 MHz band Radio Fault No response detected from radio to version command Radio Unknown Radio responded to version command but version not recognized During normal operation no messages will be printed on the CONFIG port unless the modem detects an internal consistency error In such a case the modem could print a message indicating a line number and file for example Fail 123 c RND e455U D current sources hardware c In this case the module may be able to continue functioning but you should take the following steps 1 Re start the modem and check if the error occurs again 2 If the error continues to occur contact ELPRO support with the message and information about your application Man_455U D Rey 3 00 Page 63 455U D Radio Modem Module User Manual 4 8 Dual Redundancy Two modems can be setup to act as a dual redundant pair If one modem fails the second modem can take over the communications task One of the modems is designated the Primary modem and the other is designated the secondary Redundancy is configured via the AT O command 03 configures the primary modem and 04 configures the secondary modem In addition one of the two modems will be the currently active modem This is
35. Q1 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 Valid Command Entered 1 CONNECT e Connection established CONNECT baud is displayed for X1 X2 X3 2 RING e e Module Received an incoming connection request 3 NO CARRIER e e e Connection with remote module lost or not initiated 4 ERROR e e Invalid Hayes command entered 7 BUSY e X0 X1 display NO CARRIER instead of BUSY 13 RINGING e X0 X1 X2 Don t display RINGING message 5 CONNECT 1200 CONNECT at 1200 baud 10 CONNECT 2400 CONNECT at 2400 baud 11 CONNECT 4800 CONNECT at 4800 baud 12 CONNECT 9600 CONNECT at 9600 baud 15 CONNECT 19200 CONNECT at 19200 baud Page 78 O Jan 2007 Appendix C Appendix C The following table lists the S Registers supported by the 455U D modem No SO S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 Range 0 255 3 255 1 255 0 127 0 127 0 127 0 255 1 255 0 255 0 255 0 255 0 255 Function Attempts before Answering Call Escape Sequence Guard Time Escape Sequence Character Carriage Return Character Line Feed Character Back Space Character Inactivity Timer Link Check Timer Numb
36. R DI DE EE 15 1 3 2 Character EYBERS E 15 LS Seal Dita Rate sr BEE a o e e e Lolo deco dd 16 1 54 Radio Data Rate soto aiii Ge n deo Ee iii 16 15 5 Radio Mess dre EE ee A A EE 16 1 6 ADDRESSINGS SES EE EA rta 17 1 6 1 Multiple Device Connectivity MD esse ccc iets AGE RE ee Sk PG ESE aoe 17 1 7 OPTIMUM PATH ROUTING ss iese EE Ee ee EES Edge ee oi ccc a dee idee ds 18 1 8 DUTY CYCLE LIMITING s o dee ida dida 19 1 9 WHAT OPERATING MODE TO USE eeuse sees ee se ee se se ee ee ee ee ee ee Ee ee Ee Ee Ee Ee ee ee ee ke ke ee ke ke ee ee 19 1 8 1 Unacknowledged or Acknowledged mode ee ee se se ee ee ee Re ee 19 1 82 Error CHECK assess da 20 CHAPTER TWO INSTALEATION sesse sesde ese es ee sesse se esse dese ee ed se ede gese esse de 21 2 1 GENERAL OE EL OR ER N OE baii 21 2 2 ANTENNA INSTALLATION soani Ge ee herewith ead veda earners 21 2 2 1 3dB 6dB Collinear antenna ie ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 23 AS AOL ALE MINAS ne ee GE een ee rates tee ee De ek ee ee es S 24 2 3 od EO US N AN 24 2 4 SERIAL CONNECTIONS 0 Scere GEE dace Ee EE E 26 2 4 1 RS232 Serial VA EE EE RE N N 26 242 RS232 Configuration Port iese sesde ge cael ees 27 2 4 3 RS485 Serial POLE 2 A A AAA eaten TR E eee Reed 27 2 5 DISCRETE VOPOINT EE Ri dere A A Dane Saeed 28 2 5 1 Using the Discrete 1 0 as an Output sees tetas corintio toes ee IERE ee RE eek 28 2 5 1 Using the Discrete VO point as an Input sesse esse ee ee Re GR Re GR Re RA e
37. T S AT V AT amp Axx Oe 1 2 3 4 5 AT amp Bxx Oe 1 2 3 4 5 AT amp C amp CO Page 72 Encryption Mode Use security menu AT S to change encryption key Disable security encryption Enable security encryption on transmitted messages Enable security encryption on transmitted messages and enforce encryption on received msgs Enter Module Serial Number 11 characters Max Requires Radio Access AT R to change Control digital I O point Turn digital I O point off And enable as an input Turn digital I O point on Digital I O point reflects communications link Set the Remote Access Password This password must be entered by a remote user before accessing the module over the radio Also A1 must be set Enter Radio Access Password Enables radio commands until next reset Enter AES Security key Enter Hardware Revision 7 characters Max Requires Radio Access AT R to change RS 485 Serial port Character Type Data bits Stop bits Parity 8 data No parity 1 Stop Bit 8 data No parity 2 Stop Bits 7 Data Bits Even Parity 1 Stop bit 7 Data Bits Odd Parity 1 Stop bit 8 Data Bits Even Parity 1 Stop bit 8 Data Bits Odd Parity 1 Stop bit RS 232 Serial port Character Type 8 data No parity 1 Stop Bit 8 data No parity 2 Stop Bits 7 Data Bits Even Parity 1 Stop bit 7 Data Bits Odd Parity 1 Stop bit 8 Data Bits Even Parity 1 Stop bit 8 Data Bits Odd Parity 1 Stop bit Data Carrier
38. Utility _ Asaf x File Communication Tools Help B S b Ea Modem Connections Operating Mode Mode Settings R54aes S Registers Configuration Settings El System p Unacknowledged Mode Radio Stats Radio Modem RS232 EE Unit 5 Auto Online Sytem Address jo El AOS H Unit 11 3 Unit 1 i Single Connect Unit Address 5 j ATu Radio Statistics Unit 19 Acknowledged Mode Unit 10 Auto Dial Digital 140 OFF C Auto Answer Temp 40 C Single Connect Alarms No Alarms R5232 path Battery Voltage OV 20 11 Supply Volt OV RS485 path EE z3 s3 Receive level 0 Serial Communications Repeater Settings J Repeat Messages to address 0 Copy Messages to address 0 out serial port N ES Diagnostics information Config Port Com SN 00009052341 Unit 5 4 5 Radio Path Testing To carry out a radio path test you will need two 455U modules One module will be fixed and the other mobile Both units will need power supplies and antennas The power supply for the mobile unit is normally a 12V battery but make sure that the battery is fully charged batteries with low voltage will lead to low radio power which will affect the test result The object of the test is to determine whether radio paths are reliable marginal or unreliable A reliable path will have a margin of at least 10dB above the minimum required signal level in good weather th
39. above 3M 23 TAPE SURGE the antenna to ARHESTOR rovide shielding OPTIONAL P 8 COAMAL CABEE STRESS RELIEF LOOP 2 2 1 3dB 6dB Collinear antenna A collinear antenna PROVIDE GOOD GROUND transmits the same CONNECTION TO 1 GND MAST MODULE amount of radio AND SURGE power in all ARRESTOR directions as such they are easy to install and use For ke i INSTALL AERIAL ABOVE EARTH STAKE marginal radio LOCAL OBSTRUCTIONS IF GROUND CONDITIONS ARE paths the following POOR INSTALL MORE THAN lengths are the recommended maximum for the coaxial cable to the antenna RG58 10 metres RG213 20 metres Note that this applies to marginal paths only if the radio path has a strong radio signal then longer Man_455U D Rev 3 00 Page 23 455U D Radio Modem Module User Manual lengths of cable and hence more cable loss can be tolerated If more than 20 metres of cable is required for a marginal path installation then a low loss cable such as 10D FB or a higher gain antenna should be used Collinear antennas should be mounted vertically at least 1 metre away from a wall or mast 2 2 2 Yagi antennas Antenna installed with drain holes A Yagi antenna provides high gain in gown the forward direction but lower gain in Coax feed looped other directions This may be used to mecton compensate for coaxial cable loss for installations with marginal radio path The Yagi gain also acts on the receiver so adding Yagi antennas
40. aced into the input buffer This buffer will store up to 8Kbytes of data and CTS RTS control can be configured on the RS232 port to prevent overflow When the 455U 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 if 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 This delay is configurable separately for the RS232 and RS485 serial ports Alternatively a Transmitter Hold up time can be configured S Register S27 to keep the transmitter keyed up between characters 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 1020 bytes If there is still data in the input buffer the 455U D will start another radio transmission An error check can be added to each radio message this is a user configurable selection If error checking is configured then a 16 bit CRC error che
41. after the escape sequence The 455U 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 Acknowledged mode Once in configuration mode the 455U 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 unless 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 4800 baud B selects the radio rate parameter and 2 is the value corresponding to 4800 baud Summary Enter command mode lt 1sec break gt lt 1 sec break gt Response from 455U D OK Enter configuration commands ATxy Page 50 Jan 2007 Chapter Three Configuration Response from 455U D OK Save configuration AT amp W Exit command mode ATO Note that some commands will automatically exit command mode Several commands can be run together for example ATB2 amp WO 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 switch refer sectio
42. age header whether it uses error checking or not so a single modem can receive messages with and without error checking without requiring changes to the configuration Error check is strongly recommended for Acknowledged mode operation If error check is not configured then a 455U 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 When using OPR with Modbus RTU or DNP3 protocols error check should be disabled as these incorporate their own error check within the data frame When using OPR with Modbus ASCII protocol error check should be enabled as this protocol only incorporates a weak LRC error check When using OPR with DF1 protocol Error check must be enabled if the DF1 protocol is configured for Block Character Check BCC Error check must be disabled if the DF1 protocol is configured for Cyclic Redundancy Check CRC Best performance is found when DF is configured to use CRC and Error check is disabled on the 455U D Page 20 Jan 2007 Chapter Two Installation Chapter Two INSTALLATION 2 1 General The 455U D module is housed in a rugged aluminum case suitable for DIN rail mounting Terminals will accept wires up to 2 5 sqmm 12 gauge in size Normal 110 240V AC supply should not be connected to any terminal of the 455U D module Refer to Section 2 3 Po
43. ained from the Product CD which came with your purchase or can be downloaded from our web page www elprotech com When you use this program you create a configuration in the PC and then load or program the configuration into the 455U D module You can also read the configuration from a module to edit Page 32 Jan 2007 Chapter Three The configuration program groups of the configuration details of the units in one system together in one configuration file The opening screen shows an empty system If configuring a new system select Add new modem configuration In the left hand column are the 455U units in the system To add more units select System and Add new modem Configuration 455U Configuration Utility all File Communication Tools Help Delala Modem Connections Add new modem configuration Load new modem into system 455U Configuration Utility Eile Communication Tools Help ojela alle 2 configuration Modem Connections Operating Mode Mode Settin E System Unacknowledged Mode To load the configuration of an existing UNIT Auto Online ie module select Load new modem into Single Connect Unit Address system from the System screen ends od 3 Auto Dial Auto Answer C Single Connect RS232 pat
44. and In Unacknowledged mode the normal setting is auto connect If single connect is selected then the destination address is normally controlled by the host device using AT commands Note that the auto connect or single connect setting has no effect on the RS485 port it is always auto connect You can enter the destination address for the RS232 port in the same way as described above for the RS485 port Man 455U D Rev 3 00 Page 37 455U D Radio Modem Module User Manual In this example the destination port is the RS232 port on unit 15 via repeater 31 455U Configuration Utility File Communication Help Delanle Operating Mode gt Unacknowledged Mode e Auto Connect Single Connect Acknowledged Mode Auto Connect Master Auto Connect Slave Single Connect IM ij x Unit Unit Unit Unit Unit Unit Unit Port Cancel If using AT commands Mode Settings Sytem Address 5863 y Unit Address fi R5232 path 20 31 15 RS485 path 23 31 32 33 140 Repeater Settings e Auto connect is set by selecting Unacknowledged mode AT amp MO and fixed line mode AT amp L1 and by configuring a destination address into auto dial location 0 AT amp Z0 e Single connect is set by selecting Unacknowledged mode AT amp MO and deselecting fixed line mode AT amp LO In this mode the modem will go to command mode as soon as it is powered up The RS232 por
45. ands Dual Redundancy is set via the AT O command set output function to force a changeover from primary to secondary use command AT O5 to force a changeover from secondary to primary use the command AT O6 the status of the Dual Redundant system is displayed in register S33 S33 Value 2 Nn Bb U VO LED indication for Dual Dual Redundant State Active Primary Active Secondary Active Primary no secondary detected Inactive Primary Inactive Secondary Redundancy operation The I O LEDs on the two modules indicate the status of the dual redundancy operation The LEDs should flash in synchronization If they do not the wire connecting the DIO of the two modules may be disconnected LED Sequence Redundancy Status 1 seconds on Y2 second off Normal operation Primary is active Secondary 1s inactive but functional 1 second on 1 second off Secondary Fault Primary is active Secondary 1s inactive and has a fault 1 second on 2 seconds off Secondary is active Primary is inactive and has a fault Always On Hardware fault on VO Circuit or module fault Disconnect wire to determine which module is functional Man_455U D Rev 3 00 Page 47 455U D Radio Modem Module User Manual 3 9 Low Power Mode The modem can be configured for low power shutdown when the DTR signal on the data RS232 port is reset In this state the supply current is reduced to app
46. ard address is the wildcard address and the message has done the number of hops specified in the AT amp H setting Man 455U D Rev 3 00 Page 75 455U D Radio Modem Module User Manual AT amp T amp TO amp TI amp T2 amp T3 amp T4 amp T5 AT amp V amp VO amp V1 amp V2 amp V10 amp Vll amp V12 AT amp U AT amp W AT amp Z AT B AT C C5 C6 AT N N1 Page 76 Self Tests Allows in field diagnostics and factory testing Tests time out after the period configured in S Register S8 if not zero Stop Tone reversals See T1 to T4 below Transmit tones Modulated at 200 Hz Transmit tones Modulated at 2400 Hz Transmit Tones Unmodulated Transmit Random Modulated tones at current radio baud rate 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 except amp P settings Same as AT amp V Only show settings that are different from the defaults Show all settings including extra debug registers View configuration in non volatile memory As for V1 but configuration in non volatile memory As for V2 but configuration in non volatile memory Set modem s Unit Address Range 0 127 Default 1 The Unit address is used to identify the module in the system It should always be set to a unique number within the modems in the system This address is also used to access to the module using the remote dia
47. at both ends of a link provides a double improvement 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 polarized or in a horizontal plane horizontally polarized For a two station installation with both modules using Yagi antennas horizontal polarization is recommended If there are more than two stations transmitting to a common station then the Yagi antennas should have vertical polarization and the common or central station should have a collinear non directional antenna Also note that Yagi antennas normally have a drain hole on the folded element the drain hole should be located on the bottom of the installed antenna 2 3 Power Supply The 455U D has a 15 28VDC normal supply and a 12 15VDC alternate supply The supply requires a minimum capacity of 24 Watt for the high power radio version 0 5 5W or 6W for the low radio power version 10 500mW If the normal 24V supply is used the 455U will provide battery charging for a 12V sealed lead acid backup battery connected to the 12V terminals The internal battery charger will provide a float charge voltage of 13 8VDC with
48. ata from host device DCD Green Modem is Online and ready to send data Red Modem is Online but Currently in Command Mode Off Communications failure or data connection not established Hardware version 1 5 and later has extended LED functionality providing red amp green indication on the serial LEDs Earlier hardware support single color yellow serial LEDs Check hardware version using ATIS command Page 54 Jan 2007 Chapter Four Troubleshooting 4 2 LED indication Diagnostics Chart OK LED OFF Continuously Power supply failure e Battery Supply Overvoltage OK LED RED Briefly Module Out of buffer memory Host device ignores CTS Low Supply Current during transmit Modem resets OK LED RED Continuously CPU Failure from startup Radio module fault Low Supply Voltage lt 7V Corrupted Configuration file OK LED RED Turns red after CPU Failure startup Low Supply Voltage lt 7V OK LED FLASHING Flashes Low Supply Voltage lt 10 7V red green twice per second e Modem is in low power mode DTR control Man 455U D Rev 3 00 Page 55 455U D Radio Modem Module User Manual heed Orange flasht RS485 Serial Port Activity Older version Hardware t DCD LED OFF Continuously e No Radio Link established DCD LED GREEN Continuously e Modem is online amp ready to transmit e In Acknowledged mode a radio link has been established DCD LED RED Continuously e Modem is in Command mode but has a radio link e
49. ck 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 packet is configurable by the user maximum is 1020 bytes If less data than the maximum size is input to the 455U D then the 455U D will transmit the actual data input If more data is input than the maximum size then the 455U D will transmit multiple packets until all of the data is transmitted Page 14 Jan 2007 Chapter One Introduction 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 1 5 1 PLC Mode The 455U D will operate most efficiently when the serial data rate is higher or the same as the radio data rate If the serial data rate is less than the radio rate there is a risk that the radio will empty the input buffer too guickly 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 into sections with delays between the sub sections To avoid this occurring the 455U D will automatically delay the radio transmission starting if the serial rate is less than the radio rate This is cal
50. communication control and diagnostics functions 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 455U 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 455U 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 455U D unit can receive data from the host device and transmit this data by radio to another or several 455U D module The other module will recreate the serial data and output it as either a RS232 or RS485 serial signal The 455U D unit provides two way communications each module can accept serial data and also output serial data The 455U D module has two data ports one RS232 and one RS485 and can connect to two host devices independently The 455U D also has another RS232 port via a RJ45 connector which can be used only for configuration or access to diagnostics information the RS232 data port can also be used for configuration and diagnostics 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 com
51. configuration and diagnostics of a remote modem first make a connection from the local 455U D unit to the other unit Right click on the unit in the left hand menu of the Configuration program in the diagram Unit 1 is the local modem Select Add Connection and then enter the address of the destination unit including any repeaters In this example the destination address is 2 After creating a connection you need to create an Association with this module Right click the Connection on the left hand menu and select Associate the modules which have been entered into the system file are shown Select the module which relates to this remote connection In this example connection 2 is associated with Unit 2 Once the Association is made right click the Associated connection and select Remote configuration Make sure that you are connected to the second RS232 port RJ45 connection If the remote modem is configured to request a password AT P command the password will be requested at this point Man 455U D Rey 3 00 455U Configuration Utility File Communication Tools Help Dleldlalelels 2 Modem Connections El System E Mode 3 Online Sort Add Unit Edit Unit Mame F2 Copy Configuration Paste Configuration Add Connection Uni Uni Uni le Connect dge 455U Configuration Utility Dia File Communication Tools Help EE Mod 3
52. configuration program run on a PC This is the most common way of configuring 2 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 device 3 Using the single DIP switch located in the end plate of the module This restores the module to a factory default configuration which is suitable for a point to point unacknowledged mode link 3 1 1 Addressing A 455U D network comprises modules with the same system address The system address is a 16 bit value 0 to 65 535 two 16 bit registers each with values O to 255 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 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 Man 455U D Rev 3 00 Page 31 455U D Radio Modem Module User Manual Each module is also configured with a unit address between and 127 this gives the module a unique identification The two data ports on the 455U D can be addressed based on the unit address The RS232 port is accessed using the unit address and the RS485 port is accessed using the configured unit address 128 So to access the RS232 port on unit 7 use address 7 To access the
53. current limit set to 1 6A minimum supply voltage 15V Page 24 Jan 2007 Chapter Two Installation Alternately the 455U can be supplied through the 12V terminals using a 12 15V supply For DC supplies the negative side of the supply is connected to earth Earth terminal The supply negative is connected to the module case internally The positive side of the supply must not be connected to earth The DC supply may be a floating supply or negatively earthed The power requirements of the 455U D units at 12VDC is 110mA quiescent and 2A when transmitting 5 Watt or 450mA for 500mW ee Power 15 30VDC supply ES DC Out 24 12 B Optional Battery Fuse 5A Power DC Out Man_455U D Rev 3 00 Page 25 455U D Radio Modem Module User Manual 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 Communication is via standard RS232 signals The 455U D is configured as DCE equipment with the pinout detailed below Hardware handshaking using the CTS RTS lines is provided The CTS RTS lines can be configured to reflect the status of the local unit s input buffer The 455U D supports XON XOFF flow control Example cable drawings for connection to a DTE host a PC or another DCE host or modem are detailed below DB9 Connector Pinou
54. d the message a is the protocol address to match a a indicates a range of addresses n indicates a repeater address in the radio network and f indicates the final address 0 127 indicates RS232 port 128 255 indicates RS485 port 2 AT amp Px x 0 to 99 Clear path number x 3 AT amp Px x 0 to 99 Display setting for Path x 4 AT amp P or AT amp P Display all configured paths 5 AT amp P Clear all paths These paths may apply to either the RS 232 port or the RS 485 port depending on the modem s operating mode AT amp R Repeater Functionality Enable or disable repeating of messages to the wildcard addresses 0 and 128 and enable or disable sending messages to serial port Also see AT amp H command amp ROe Don t repeat messages to the Wildcard address and don t copy wildcard messages out the local serial port SR Repeat Messages when the wildcard address is the next un visited Store amp Forward address in the message and message has done the number of hops specified by the AT amp H setting amp R2 Send a copy of the message out the local serial port when the wildcard address is the next un visited address in the message and message has done the number of hops specified by the AT amp H setting amp R3 Do both Actions Forward the message and send a copy of the message out the local port when the next store amp Forw
55. e 28 2 6 DUAL REDUNDANT INSTALLATION ese ss ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 29 Man 455U D Rev 3 00 Page 5 455U D Radio Modem Module User Manual CHAPTER THREE CONFIGURATION 1 cccccsssssssssssssssssssssssssssssssssssssssssssssssssees 31 3 1 BEFORE CONFIGURING i e Min is eek Ee iia ee ainia EES Gee Se sege be Eg dd 31 Id Addressin RES ES ERG DE EE AG De A GE Ee 31 3 1 2 Command Mode isco Bes EN EE a o 32 3 2 DEFAULT CONFIGURATION nonan a a ee ee a a a ee a a a ee 32 3 3 CONFIGURATION PROGRAM ees ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee Re ee ee ee ee ee ee ee ee 32 3 3 1 Reading and Configuring a module Ee SR ee id 33 3 4 REMOTE CONFIGURATION AND DIAGNOSTICS oooccccononinoncccncnnononananiciciconononananininess 35 3 5 UNACKNOWLEDGED MODE ees ee see ee ee ee se ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 36 MUN KS ER EE OR ER EE 36 32 27 RS 232 PET SAANS EE ee es EA N Re E N RD ER DEE 37 3 5 3 Unacknowledged mode Rep aters issie ss oes bosse Ee se Ee Kos ees EE Ses 38 3 5 4 Multiple Transmission Sss en a 41 3 6 RADIO AND SERIAL CONFIGURATION cccccccccccsssssssceccccccsssssssscecccesseueusesecesceseeaees 41 36 1 Radio Data Rate inn ED DE De ge is aiii leidas 41 0 2 Serial Part SELES E GE 41 3 6 3 Other Settings lo tii dde 42 3 7 ACKNOWLEDGED MODE esse sees ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 43 3 7 1 Auto Con
56. e has been no data f Host Protocol Mode RS232 path transmissions within this time If Use Host Protocol zo you use the link check feature at Modbus Master 7 RS485 path the master unit you should enter 23 ce ar Serial Communications an Inactivity Timeout value to po reset the link at the slave unit It is a good idea to use these timers as it provides a higher level of security for the Acknowledged mode system Normally a link check time will be entered at the master unit for example 10 seconds and a inactivity timeout will be entered at the slave unit for example 15 seconds It is important that the inactivity timeout is greater than the link check time A value of zero disables these parameters 3 7 2 Single Connect Acknowledged mode Single connect is similar to a dial up telephone modem In this mode the module will attempt to connect to a destination address once A host device will issue a connect dial ATD 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 unit goes online The DCD status is set LINK LED comes on DCD signal and DIO signal turn on if configured If the destination module does not respond then the initiating modem will re try up to the number configured in S Register S7 If there is no response the link is not established and no data can be transferred The module will not attempt
57. e message For example a message with 20 bytes of data transmitted at 9600 bits sec with no repeaters will start to be output approx 71msec after the data is input if error checking is configured and will start to be output approx 47 msec after the data is input if no error checking is 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 455U D units in a system e After each message is transmitted a 455U 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 1 6 Addressing A 455U 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 A 455U D must also be configured with a unit address this gives the module a unique identification The unit address is used to identify the two data ports on each 455U D The RS232 port is accessed by addressing the configured unit address The RS485 port is accessed by addressing the configured unit address 128 So to access the RS
58. e minimum lead in time of 20 msec is configured 1 3 Acknowledged Mode In Acknowledged mode DATA MESSAGE __ gt data is transferred between ee ae the RS 232 ports of two ZTA 7 Ack gt modules that is a point to DATA point link One of the modules is configured as a master or initiator unit and the other as a slave or responder unit There can be many slave units in the system however the Man_455U D Rev 3 00 Page 11 455U D Radio Modem Module User Manual master unit will only link to one slave at any one time Note that Acknowledged mode only applies to the RS 232 port The RS 485 port always operates in Unacknowledged mode To establish a link the master unit transmits a special connect message This initial message does not include any data If the addressed slave unit receives the connect message and is not already connected to another 455U D unit it will return an acknowledgment message Both units will activate their DCD LED and also activate their DCD output signal if configured If the master unit does not receive the acknowledgment the DCD output will reset When the connection is made DCD set the 455U D units can transmit data to each other A master can be configured to connect to a pre configured slave address in two ways e on power up the master will only connect to one fixed slave address and if the connection link fails the master will continuously try to make a n
59. eceive buffer before beginning radio transmission If there is data in the RS 485 serial receive buffer and no data is received on the serial port for this time radio transmission will begin regardless of the setting of S20 A value of zero disables the timeout so the modem will not transmit until there are at least S20 characters in the receive buffer System address is set to this value when factory defaults restored This register is not affected by the AT amp F command System address is set to this value when factory defaults restored This register is not affected by the AT amp F command Jan 2007 Appendix C S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S33 0 255 0 255 0 255 0 255 0 255 0 255 0 255 0 255 0 255 0 1 0 255 0 255 System Address High Byte System Address Low Byte Lead In Tone Time Transmitter Hold Up Time Transmitter Tail Time Unack Retries Ackmode retries Radio Flags Module Temperature State of Digital Input Battery Voltage Supply Voltage Man_455U D Rey 3 00 S Registers The 16 bit system address uniquely identifies the radio network The 16 bit system address uniquely identifies the radio network This selects the Lead In tone period units 4 msec The default 10 should not normally be changed Selects How long the transmitter will stay on waiting for more data before starting to send the tail msec
60. er of Connection attempts Acknowledged Mode Test Timer Modem Receive Level DTR Loss Detection Time Spare Function read only Command Mode S12 0 S12 1 S12 2 12 3 S12 4 Ss12 5 Diagnostic Reset ATZ or Power Up Escape sequence DTR lowered S Registers S Registers Comment Should normally be set to 1 O disables auto answering of calls ATA command to answer calls only Units 20 milliseconds Min Delay before and after entering the escape sequence also Max Delay between characters of the escape sequence Normally 43 Normally 13 lt CR gt Normally 10 lt LF gt Normally 8 lt BS gt Units Seconds O disables How frequently to send a Link Check message Usually set less than the timeout set by the ATT command 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 Units dBm RSSI indication of last received message AT amp TS command may be more useful Units 10 milliseconds Not Implemented Not Implemented Reason modem last returned to command mode i e connection lost No ACK from remote modem after connected Activity timer timed out No response to dial request to remote modem Man 455U D Rev 3 00 Page 79 455U D Radio Modem Module S13 S14 S15 S16 S17 S18 S19 S20 S21 522 S23 S12 6 S12 7 S12 8 0 255
61. ess strings of the form TTT x lt 0 0 0 gt etc That is the destination Unit Unit Unit Unit Unit Unit Unit Port address is the wildcard 0 and the jo Hp Af 1 Sl Sl Al sed repeater addresses are the wildcard 0 Cancel Consider the following network This network has a maximum of three hops to reach the most remote units there needs to be three transmissions or hops Unit 1 needs to transmit with address lt 0 0 0 gt that is three hops Man 455U D Rev 3 00 Page 39 455U D Radio Modem Module User Manual The first ring of repeaters units 14 and 15 need to be configured as below The Repeat Messages to address 0 box is selected to allow these units to repeat the broadcast messages on The Copy Messages serial port box is selected to pass any broadcast radio messages it receives to its host device The Hops box indicates the number of hops that the message has to go through before this unit will repeat the broadcast message This is to prevent units repeating messages in the wrong sequence In this case Hops is set to 1 repeater after the first hop Note that the address path for return messages is lt 1 gt FIRST REPEATER SECOND REPEATER LAST UNIT 1 Mode Settings Mode Settings 7 Mode Settings 7 Sytem Address 5863 524 525 Sytem Address 5863 524525 Sytem Address 5863 2 524 525 Unit Address fia AT amp U Unit Address fa 2 ATBU Unit Address 36 AT amp U
62. ew connection or e it can be commanded by its host device using AT commands the host device can control the master 455U D to dial a slave address connect transfer data and then disconnect or hang up and connect to a different slave address Once the communications channel has been established the 455U D unit will accept input data and send radio messages with data When a 455U 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 to 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 There can also be up to five intermediate repeaters in the link Each 455U 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 Establishing a Communications Link Master Unit Slave Unit Listen to ensure channel is clear If clear transmit connect message Receives message Radio TX LED flashes Radio RX LED flashes Check system and destination address If OK set DCD LED and output If message OK transmit back an ACK message Radio RX LED flashes Radio TX LED flashes Acknowledgment received okay communication link established Set DCD LED and output Page
63. g the transmit delay time This could be used to allow a reply message to be received before the next message is sent e Delay time S17 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 3 7 Acknowledged Mode Refer to section 1 3 There are several configurations for Acknowledged mode 3 7 1 Auto Connect Acknowledged 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 Man 453U D Rev 3 00 Page 43 455U D Radio Modem Module User Manual If there is no data transfer within the preconfigured link check time the master will send an empty data message to check the communications link The connection will be broken if a communication failure occurs or if the local or remote 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 455U Configuration Utility Up to six repeater addres
64. gister 29 The receiving unit will detect repeat messages and only send the data out the serial port once 3 6 Radio and Serial Configuration 3 6 1 Radio Data Rate Select the Radio tab and select the radio data rate which you want to use Note that modules will only communicate with each other 1f they have the same radio data rate 3 6 2 Serial Port Settings Select the RS232 or RS485 tabs The serial port settings should be selected to match the host device Different port settings may be selected for different modules in the same system Serial data rate can be selected between 600 and 187 500 baud If the serial rate is less than the radio data rate the 455U D will automatically set transmission delay parameters in registers S18 and 19 refer section 1 5 1 To disable this set the S18 and S19 values to zero in the RS232 Serial configuration window For the RS485 port registers S20 and S21 are used The number of Data Bits can be selected as 7 or 8 The number of stop bits can be 1 or 2 Parity can be none even or odd PLC Mode Refer to Section 1 of this manual for an explanation of PLC Mode This mode is a enabled by default however may be disabled individually for the RS485 and RS232 ports If the radio or serial rate is changed select Recalculate Threshold and Timeout under the RS232 or RS485 window Flow Control Flow control affects the use of the CTS and RTS signals on the RS
65. gnostics protocol Write Current Configuration to non volatile storage Stored Numbers Up to 4 stored numbers also Auto Connect number for leased line mode Format AT amp Zx nn nn nn nn x 0 to 3 nn 1 to 127 ZO is used for the autoconnect number ZO contains the autoconnect number for the RS232 port If Fixed line amp L1 is selected Z3 contains the destination addressing for the RS485 port Generate Break signal at remote modem Currently not implemented n is the break length in units of 0 1 seconds Radio Frequency Increment Can only be set when R Password entered Set Radio frequency increment to 5 00 kHz Set Radio frequency increment to 6 25 kHz Radio Bandwidth Can only be set when R Password entered Set Radio to 2400 HZ bandwidth Jan 2007 Appendix A Hayes AT Commands NO Set Radio to 4800 HZ bandwidth AT P Radio Power Can only be set when R Password entered 5 Watt Radio 500 mW Radio PO Set Radio to 500 mW Set Radio to 10mW Pi Set Radio to 1 W Set Radio to 25 mW P2 Set Radio to 2 W Set Radio to 100 mW P3 Set Radio to 5 W Set Radio to 500 mW AT K Break signal handling control Currently not implemented AT B command from Host sends break on serial Receive break from online remote KO Purge Buffers amp send Enter command state amp purge Purge buffers and send break buffers Don t send Break break to host dl As for KO Purge Buffers and send brea
66. gt Even data bits even or odd or no parity 1 or 2 stop bits gt Most applications will require the character type to be Odd 1 the same at each 455U D modem in the system None 5 Nevertheless the character type may be configured to g Even 1 be different at different 455U D modems Data is Odd 1 transmitted by radio as an eight bit byte without stop None 1 2 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 Man 455U D Rev 3 00 Page 15 455U D Radio Modem Module User Manual 1 5 3 Serial Data Rate The communications baud rates supported on both the RS232 serial port and the RS485 serial port are 600 1200 2400 4800 9600 14400 19200 28800 31250 38400 57600 76800 93750 115200 and 187500 baud the user selects one of these rates during the configuration of the modem The RS232 and RS485 ports may be configured with separate data rates 1 5 4 Radio Data Rate The data is transmitted by radio as direct modulated synchronous data at 1200 2400 4800 9600 or 192
67. h zo f 455U Configuration Utility 2 iol xi File Communication Tools Help ojeada 2 tee mM ET jereng nr TE pinos R5485 S Registers Configuration Settings TUnacknowledged Mode Radio Stat i Sen Aiae TE 2 524525 io Stats Radio Modem As232 EE ES Unit Address mm Ratio Statistics Acknowledged Mode Auto Dial Digital 1 0 OFF Auto Answer Temp 400C C Single Connect Alams No Alarms RS232 path Battery Voltage OV 20 jo AS485 path Supply Voltage OV z3 EE Receive level 0 Serial Communications Repeater Settings J Repeat Messages to address 0 m Copy Messages to address 0 out serial port Hops fo Config Port Comi SN 00008050019 Unit 10 3 3 1 Reading and Configuring a module You will need a connection cable between the PC and the 455U D The cable may connect to either the DB9 port or the RJ45 configuration port Connecting to the RJ45 configuration port allows the modem to be configured while the DB9 port remains connected to the functioning Man_455U D Rev 3 00 Page 33 455U D Radio Modem Module User Manual host system Connecting to the RJ45 port also allows configuration of remote modems in the system The cable to connect to the DB9 should have straight through connections as per section 2 4 1 of this manual If your PC only has USB serial connections with no RS232 port you will need to purchase a USB to RS232 converter cable The cable to co
68. he transmit and receive frequency using AT commands enter the command ATFT xxx xxxx transmit or ATFR xxx xxxx receive where xxx xxxx is the new frequency in MHz The frequencies must be within the allowed range Use the AT amp V command to display the current settings and the allowed range of frequency To change the power setting using AT commands enter AT Px where x is a number from 0 to 3 with 0 corresponding to the lowest power setting 500 mW on E455U D 5W and 3 corresponding to the highest power setting SW on E455U D 5W Other radio parameters are available after pressing the Advanced Configuration button and entering the correct access password These items are protected to ensure that the radio is not inadvertently mis configured in contravention of radio licensing requirements Page 62 Jan 2007 Chapter Four 4 7 The modem is configured to print diagnostic messages out the RS 232 Configuration port At Troubleshooting Diagnostic Messages startup this port displays the following messages Firmware ELPRO E455U Modem firmware version Version V3 00 Configuration Config Loaded OK Configuration was loaded from EEPROM with no Load status fault detected Default Config Set Factory default configuration via Default Switch Config Load Failed Problem with CRC check of stored configuration OK LED will remain RED and configuration should be re programmed Radio Type Radio P450L
69. his 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 Use the AT B command to check the signal strength between two modules Next measure the background noise by selecting the AT amp T5 command and reading the value from the terminal For reliable operation with a safe margin for changes in the radio path the received signal should be better than the following margins Radio Baud Rate Margin above Noise Minimum Value dBm 9600 10 95 4800 10 105 AS Radio Statistics The AT S command returns useful statistics on radio operation which modems can be heard from a particular modem and how good the signal strength is from each modem AT S Radio Statistics S Display stats including last received signal strength from all module addresses 1 127 only modules that have been received are displayed 1 Rssi 98dBm Rx 95 Fwd 0 Err 72 Last 0d03h19m18s Stats are Last Received signal strength Number of Messages Received from this address Number of messages Forwarded from this address and Number of received messages with errors from this address Also indicates the time since last received a message from this address Snn Display Stats for remote number nn only 4 4 3 On line diagnostics Diagnostic values may be read by the 455U Configuration program or by a host device using AT commands
70. ignal and DCD LED reset Man_455U D Rey 3 00 Receive message e Radio RX LED flashes e Check system and destination address e If OK check error check e f message okay transmit back an ACK message e Radio TX LED flashes e Serial data is output e Serial LED flashes Destination Module Receives message RX LED flashes Check system and destination address If incorrect transmit no message and no serial output Page 13 455U D Radio Modem Module User Manual 1 4 Security Encryption Some applications require that the system be made secure from eavesdropping and hacking To provide for these applications the modem supports AES 128 data encryption The modem may be configured to transmit messages with or without encryption accept messages without encryption or to require that received messages are encrypted Messages sent with encryption have an additional 16 bytes of data added to the start of the radio message the initialization vector 1 5 Serial and Radio Data The 455U D module provides a full duplex RS232 serial port and half duplex RS485 serial port The radio communications is 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 455U D without problems If an application really requires full duplex communications then the 455U D should not be used Data input at the serial port is pl
71. ing to remote units using AT commands It is possible to configure different units in the same system with different operating modes however this requires care A 455U D unit configured in one mode can act as a repeater for messages sent between two 455U D units configured in the other mode and it is always possible to send Unacknowledged mode messages to the RS 485 port on a module regardless of the configuration of the RS 232 port Man_455U D Rev 3 00 Page 19 455U D Radio Modem Module User Manual 1 8 2 Error Check Error checking may be configured in both Unacknowledged and Acknowledged mode When the error check is configured a 16 bit CRC Cyclic Redundancy Check attached to the end of each message This check is used to detect any corruption of the data when it is received at another 455U D unit Error checking is individually selected for the RS232 port and the RS485 port When a unit receives a radio message with error check it will not output data until it has received the whole message and ensured that the error check is correct If the unit does not have error check configured then it will output data as it is received streaming from the radio out the serial port Hence operation of the units is faster if error check is not configured Usually units in the same system will have the same error check configuration however it is possible for users to configure the units differently Each message sent indicates within the mess
72. ions test command in the configuration software Q Record these measurements for comparison later during commissioning or if the system has problems later If the radio path test is not successful 1 Increasing the height of the antenna at either module or at both modules can significantly improve the result Sometimes moving the antenna to the side helps if there is an obvious obstruction in the radio path 2 Change one or both antennas to a higher gain if regulations allow Use a shorter coaxial cable between the antenna and the 455U this may involve moving the 455U nearer to antenna mounting or use a different coaxial cable with lower loss 4 Ifareliable radio path is not possible because of distance or path obstructions you will need to consider using a repeater module The ideal repeater is another module in the system in a good location to act as a repeater If this is not the case you need to consider installing a module to act specifically as a repeater 4 6 Changing the Radio Parameters It is possible to change the radio Transmit and receive frequency and the radio power setting from the configuration software Select the Radio tab and enter new values for TX Frequency and RX Frequency When changing the frequency of a remote module over the radio take care to change the most distant module The module that communicates through the most repeaters first then change the closer modules in order To change t
73. is margin is enough to ensure that the radio path remains reliable in poor conditions and with changes in antennas and environment over time A marginal path will work reliably in good conditions however may fail during poor conditions or if the landscape changes over time A margin of 10 dB is recommended as a safe minimum Set up as per section 4 4 1 to carry out a BER test Procedure Q Configure the modules on the bench to communicate with each other in Unacknowledged mode a When the modules are close to each other carry out a BER test without any antennas connected to make sure that the modules will communicate with each other Q Set up the fixed module in one of the test positions this is normally at a control centre or repeater site Fix the antenna in a temporary fashion You will need to make an initial assessment on how high the antenna should be mounted Man 455U D Rev 3 00 Page 61 455U D Radio Modem Module User Manual Q Take the mobile module to the other end of the radio path The antenna at this end can be either held by the tester or fixed in a temporary fashion Note that a person s body will affect the radiation pattern of an antenna so if the antenna is hand held and the test is not successful try again with the antenna fixed to a 1 metre length of plastic pipe or timber The tester holds the length of pipe or timber with the antenna above head height a Test the radio path by AT B command or the communicat
74. ises selecting parameter values for the operation of the 455U D unit Before you start configuration parameter settings must be decided The main parameters are e Addressing system address and unit address e Character type You need to find out the character type of the host devices connected to the 455U D units The most common character type is 8 data bits no parity 1 start bit and 1 stop bit e 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 e 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 We recommend that you use 4800 bits sec for 12 5KHz channel width or 9600 bits sec for 25KHz channel unless your application requires the faster data rate to operate reliably The radio range for the top data rate 9600 19200 bits sec will not be as good as that for 4800 9600 e Operating mode You need to decide which operating mode you wish to use Modes are Unacknowledged or Acknowledged error checked or no error check These modes are discussed in Chapter 1 and in more detail in following sections The other configuration parameters usually do not need to be changed and are provided as a means of fine tuning the operation of the 455U D units Configuration may be achieved by three different methods 1 Using a Windows
75. k As for KO K2 Send Break ahead of As for KO Transfer break to host buffered data ahead of buffered data K3 As for K2 Send break ahead of buffered As for K2 data K4 Queue Break behind As for KO Oueue Break behind buffered data buffered data K5 As for K4 Queue break behind buffered As for K4 data AT S Radio Statistics S Display stats including last received signal strength from all module addresses 1 127 only modules that have been received are displayed 1 Rssi 98dBm Rx 95 Fwd 0 Err 72 Last 0d03h19m18s Stats are Last Received signal strength Number of Messages Received from this address Number of messages Forwarded from this address and Number of received messages with errors from this address Also indicates the time since last received a message from this address Snn Display Stats for remote number nn only ANT Inactivity Timeout Units Seconds Value 0 255 O Disable If there is no activity within this time the modem drops the connection See also S Register S6 Man_455U D Rev 3 00 Page 77 455U D Radio Modem Module Appendix B User Manual 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 AT
76. led PLC Mode The radio will not start transmitting until a certain number of bytes have been input into the input buffer The 455U 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 S20 for RS485 when a configuration is entered whereby the serial rate is less than the radio rate the 455U configuration software will automatically enter an appropriate value in 18 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 455U D will automatically calculate the override time based on the configured serial rate and S18 the number of bytes required to start The override time is stored in register S19 S21 for RS485 this value can also be changed by the user In applications where the extra delay introduced by buffering data at the sending modem is unacceptable an alternative is to configure a Transmitter Hold up time S Register S27 This keeps the transmission keyed up between data characters 1 5 2 Character Type The 455U D may be configured by the user to Data Parity Stop recognize the following types of characters 7 or 8
77. ll no ACK then the master will reset the link DCD reset A value of zero disables this function OOOO 2 ioj xi Ee AA You can enter address structures for four slaves addresses ZO to Z3 However the host R5485 SRegisters Configuration Settings must use AT commands to select which slave is Rado Stas Rado Modem 5232 required Without the use of AT commands the General Routing master will only attempt to connect to the Stored Numbers address configured in Z0 o The Z0 to Z3 addresses can be configured by ty selecting the Modem tag and then the 2 Routing tab 3 Page 44 Jan 2007 Chapter Three Configuration Z3 stores the address that RS 485 messages are sent to Auto Connect Slave 455U Configuration Utility The only configuration required for File Communication Help a auto connect slave module is to enter its unit address BD S bd Al Cm 2 It s address path will be Operating Mode Mode Settings gt Unacknowledged Mode automatically taken from the SR ge AE a5 924925 Connect message from the master Ba aaa a ingle Lonmec E y unit Unit Address 2 E gt Acknowledged Mode j A If you enter an Inactivity C Auto Connect Master Link Check Time out fio f S6 Timeout value then the 455U D Auto Connect Slave Inactivity Timeout e0 j ATT will automatically reset the link if LAS ther
78. lowing image shows the states of the dual redundant system and the relationship to the AT O commands and S registers 33 and S11 E455U D Dual Redundant Control Primary ATHO3 hd Get Control Timeout S11 Fault cleared Secondary Inactive Secondary Active Forced Standby a 5 Standby S33 5 ATHO5 Secondary Inactive Fault Active No Secondary S33 4 Secondary Responding Active man A 2 Secondary Not pesonas NI E455U D Dual Redundant Me Sandy Control Secondary slee ATHO4 99950 NA S33 6 Man 455U D Rev 3 00 Page 65 Primary Active Primary Active Inactive a f Primary Inactive after timeout Primary Inactive S11 Primary Force Changeover S33 6 AT O6 iN l Active S33 3 455U D Radio Modem Module Chapter Five General EMC specification Radio specification Housing Terminal blocks LED indication Operating Temperature Power Supply Normal supply Battery or 12V supply Current Drain 13 5VDC Radio Transceiver Single channel Transmit power Page 66 User Manual SPECIFICATIONS EN 301 489 EN 300 113 EN 300 220 140 x 114 x 30mm 5 5 x 4 5 x 1 2 inch Removable OK operation Serial RX and TX Radio RX and TX DCD active 30 to 60 degrees C 40 to 70 degrees C 0 99 RH non condensing 15 to 30 VDC 11 to 15VDC 110 mA quiescent Low power 3
79. metres 300 feet of clear path before a group of trees the trees will have less affect on the radio path To help in planning radio systems ELPRO provides a free utility for estimating path performance The modules provide test diagnostics to test the radio path and display radio signal strength An antenna should be connected to the module via 50 ohm coaxial cable eg RG58 Cellfoil or RG213 terminated with a male SMA 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 antennas are chosen carefully to avoid contravening the maximum allowed power limit on the on the radio channel if in doubt refer to a authorized ELPRO distributor in your country or email ELPRO on support elprotech com The gains and losses of some typical antennas and cable types are Antenna Gain dB Dipole with integral cable 0 3dBd Collinear 5 6dBd Collinear 8 6 element Yagi 9 9 element Yagi 12 16 element Yagi 15 Cable type Loss dB per 10 m RG58 4 5 RG213 1 65 Cellfoil 2 25 The net gain of the antenna cable configuration is determined by adding the antenna gain and the cable loss For example a 6dBd Collinear with 20 metres of RG58 has a net loss of 1 dB 8dB 20 10 x 4 5 dB 8dB 9dB
80. miting must be calculated over a time no greater than one hour You might prefer to calculate the duty cycle limit over a shorter time The AT T command sets the time in minutes to use to calculate the duty cycle 1 9 What Operating Mode to Use 1 8 1 Unacknowledged or Acknowledged mode Unacknowledged mode provides simpler operation as the units do not acknowledge transmissions received However confirmed operation in unacknowledged mode will only occur 1f the host devices check the messages and return acknowledgments Generally if a device is able to operate on a RS485 multi drop serial link it is suitable for unacknowledged mode The RS 485 port only operates in Unacknowledged mode It is possible for the RS 485 port to be operating at the same time as the RS 232 port is sending data to another location using either Acknowledged or Unacknowledged mode MDC RS 232 links can also be made in Unacknowledged mode the 455U units can effectively provide a multi drop network for RS232 devices provided the devices use a communications protocol that includes addressing and message acknowledgments Normally Unacknowledged mode would be used with PLC s and similar devices Acknowledged mode is suitable for point to point RS 232 links where the host devices do not provide addressing or message acknowledgment Multi point networks are possible in Acknowledged mode however a master host device must control connecting and disconnect
81. municate on a common RS483 serial bus Each 455U D can simultaneously connect to signals from both RS232 and RS485 In addition RS232 data from one host device can be transmitted to a remote 455U D unit and output as RS485 data to another host device The unit includes a fixed frequency radio transceiver with overall frequency range 360MHz to 512MHz in seven radio bands each 20MHz wide The user can configure the radio frequency within the 20MHz band refer to Diagnostics section The 455U D is available with a high power radio 0 5 5W suitable for licensed narrow width channels 12 5 20 or 25KHz The unit is also available with a lower power radio 10 500mW suitable for license free narrow width channels in countries where these are available The operating parameters of the 455U D are configured from a PC using a Microsoft Windows configuration package provided free with the module or from a PC terminal using Hayes commands Page 8 Jan 2007 Chapter One Introduction Ordering Information 455U Type Radio Type RF Power Channel Band Frequency Type D Data modem full functionality B Data modem Bell 202 or V23 messaging A External modem 600 ohm audio input C Data modem compatible with ELPRO 405U Radio Type L 10 500mW H 0 5 5W Power Actual power reguested for example 100mW or 2W Channel N 12 5 KHz Ww 20 25 KHz Band 390 380 400 MHz 410 400 420 MHz 430 420 440 MHz 440 430
82. n 3 10 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 455U D The following commands are the most common 3 13 AT Configuration Examples The following section describes some typical applications and the configuration of the modems involved Data Logger Network with Central Computer In this application the computer connects to each logger on a regular basis and uploads information from the logger The logger protocol does not support error checking and the PC application software is designed to work with telephone modems The PC software issues ATD commands to the central modem to make connection with each logger When it has finished communicating with the logger it issues an ATH command to terminate the connection Central Modem configuration AT amp M1 Configure Acknowledged Mode AT amp E1 Enable Error checking AT amp U 1 Set unit address to 1 Remote Modems configuration AT amp M1 Configure Acknowledged Mode AT amp E1 Enable Error checking ATSO0 1 Enable Auto Answering on first attempt AT amp U2 AT amp U3 etc Set unit address to 2 3 4 etc for each remote modem Unacknowledged mode with broadcast messages and repeaters This example demonstrates how to broadcast messages to the entire system using unacknowledged mode Man 455U D Rev 3 00 Page 51 455U
83. n by a dot e Command Function ATA Answer Incoming Call The modem can also be set to answer incoming calls immediately or after a certain number of attempts See S Register S0 ATB Set Radio Baud Rate Radio Baud rates are 1200 2400 4800 9600 and 19200 baud Some baud rates may not be possible for some country codes The baud rate selected depends on the radio bandwidth setting AT NO or AT N1 With Narrowband radio With wideband radio AT NO selected AT NI1 selected BO Set 1200 baud Set 2400 baud Bl Set 2400 baud Set 4800 baud B2e Set 4800 baud Set 9600 baud B3 Set 9600 baud Set 19200 baud ATC Serial Baud Rate selection Automatic Baud Detection control These commands refer to the RS 232 serial port ATR commands refer to RS 485 port COe Set automatic baud rate detection Cl Set 600 baud C2 Set 1200 baud C3 Set 2400 baud C4 Set 4800 baud C5 Set 9600 baud C6 Set 14 400 baud C7 Set 19 200 baud C8 Set 28 800 baud C9 Set 31 250 baud Foundation Fieldbus Profibus FMS C10 Set 38 400 baud Cll Set 57 600 baud C12 Set 76 800 baud C13 Set 93 750 baud For Profibus C15 Set 115 200 baud Man_455U D Rev 3 00 Page 69 455U D Radio Modem Module User Manual C16 Set 187 500 baud For Profibus ATD Connection Dialing Control Dial a specific remote or a stored number This command has a different effect depending on whether it is issued from the RS 232 main serial port connects to the remote modem s serial ports o
84. nect Acknowledged mode ss ge eo ii 43 3 7 2 Single Connect Acknowledged mode ee ee Re Ge ee Re AR RR 45 3 8 DUAL REDUNDANT STANDBY nuring a a a a aa aai 46 3 9 LOW POWER MODE ii se ke ie a a Ge Ge be ee a aa a aA 48 3 10 OPTIMUM PATH ROUTING henni inann ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 48 Path CONEA ti A AA AA AA AAA 49 Configuring for Modbus Protocol RTU or ASCI cece se ee se Se ee ee ee nociones 49 Modbus RTU Protocol ees ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee danoi ah 49 Modbus ASCH protocol rios iii sd Re ER cece Se SR Re Ke Eed oe eo Ge decicion 49 DE1protoeBl ss ES uh ES te ea alan aa eee Rate DA EG EE ae AA RES 49 BERE RE OE TEE OR IE HE N AN N OE N 50 3 11 ADVANCED SETTINGS S REGISTERS ccccccccccccscssssscsccccccsessessceccccssssssussaseceeess 50 3 12 HAYESAT GOMMANDS ii ee de ct fetes Sk A E 50 3 13 AT CONFIGURATION EXAMPLES ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 51 3 14 SWITCH CONFIGURA TION Se Ee has psa GE St 53 CHAPTER FOUR TROUBLESHOOTING cccccssssssssssssssssssssssssssssssssssssssssssscees 54 4 1 POWER UP AND NORMAL OPERATION ci eN Ge eg ee de ees bee Se ee 54 4 2 LED INDICATION DIAGNOSTICS CHART iese ee ee ee se se se ee ee ee ee ee ee ee ee ee ee ee ee ee ee 55 4 3 OPERATING PROBLEMS esse ee ee sees ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 56 4 4 WEST EUNETIONS es
85. nel 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 455U D modules The modules may be configured by the user to operate in one of two modes In Unacknowledged mode it is assumed that the host devices control the flow of data the 455U D does not provide handshaking In Acknowledged mode the 455U D units provide handshaking to control the flow of data The RS485 port always operates in Unacknowledged mode Man_455U D Rev 3 00 Page 9 455U D Radio Modem Module User Manual 1 1 3 Repeater Functionality A 455U D unit can act as a repeater for other units A repeater receives a radio message from one unit and re transmits it on to another unit Up to seven repeater addresses can be configured in a radio link If transmitting to the wildcard 0 address in Unacknowledged mode that is a broadcast transmission then the repeater unit can be configured to also output the data to its own host device 1 1 4 Hot Redundant Standby Two 455U D units can be installed together in a Dual Redundant relationship an active unit with a hot redundant standby One unit is configured as a primary unit and the other the secondary The secondary unit acts as a standby for the primary Under normal operation the primary unit is active and the standby i
86. nnect to the RJ45 Config port should be wired as described in section 2 4 2 of this manual Select the communications port that you will be using on the PC make sure that no other program is using this com port The program default is COM1 if you are using a different com port select the Com Port Settings icon from the toolbar and select the com port If connecting to the DB9 port Make sure that the serial data rate and character type is the 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 has already been in service and you do not know this information then you will need to force the module to factory default settings using the DIP switch in the module end plate see section 3 10 of this manual If connecting to the RJ45 port the serial data rate is fixed at 9600 baud The character type is 8 data No parity 1 stop bit To read the configuration in a module connect the cable and select the Read icon on the toolbar To configure a module select the Write 1 E icon on the toolbar READ WRITE When you read or configure a program you will see the Serial Communications communication messa tween the program and th 522 0 523 0 524 0 Ek ges De o aP 98 ay ang the 25 0 26 12 27 0 528 0 529 0 module in the Serial Communications box in the bottom 539 3 31 3 532 69 533 0 left hand corner of the p
87. ons 3 00 and later The trigger conditions for a change over are Complete failure of the active 455U power failure CPU failure Loss of radio communications radio comms fail Fault detected by internal diagnostics over temperature antenna fault high SWR frequency failed to lock or transmitter PTT timeout Operator request via configuration To prevent change over during short term transient fault conditions the trigger condition must be present for a time period before the change over occurs dual redundant delay time register S11 Ifthe primary unit changes over to the secondary unit the secondary unit remains as the active unit until it detects a fault or until it is forced nized Config Port Comi to change by manual configuration ucts E455U Testing 20060316 455S EES Radio Stats Radio Duty Cycle Modem R5232 The inactive unit continues to operate and can Ec HE GE receive messages via the radio and data ports However it is disabled from transmitting messages on the radio and RS485 ports it can transmit Communication Link State messages on the RS232 port Digital 140 C ON OFF Read Input C Dual Redundant Primary Both the primary and standby units should have the Force Standby same configuration except for the Redundancy Dual Redundant Secondary Force Standby setting ed Page 46 O Jan 2007 Chapter Three Configuration If using Hayes comm
88. p Tx To aid in the checking and setup of the 455U 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 Use a RS232 cable as per section 2 4 refer to section 3 3 1 on setting up the PC COM port The table below outlines the functions of the various tests AT amp T Radio Self Tests Allows in field diagnostics and factory testing amp TO Stop Tone Reversals amp T1 Tone Reversals 200 HZ modulation amp T2 Tone Reversals 2400 HZ modulation amp T3 Tone Reversals No modulation amp T4 Random Tone Reversals Generates pseudo random data and sends out radio amp T5 RSSI Measurement Monitors the received signal strength and displays in dBm Page 58 Jan 2007 Chapter Four Troubleshooting Most radio tests are carried out using the AT amp T 2 test as this is the easiest to accomplish AT amp TS Received Signal Strength Display This option provides for testing the radio path between two 455U 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 low battery voltage etc Fade margin is an indication of how far a radio path can deteriorate before reliable communication becomes unreliable When using t
89. port is transmitted out of the radio port addressed to the configured destination 455U D module or to all modules by using address 0 Data received from the UNACKNOWLEDGED MODE dish t ADDRESSED TO ALL UNITS USING radio w1 e correc WILDCARD ADDRESS 0 addressing is transmitted out of one of the serial ports RS232 or RS485 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 to 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 If error checking is not configured at the receiving unit data will start to be output immediately after the first byte of data has been received If error checking is configured data will be output approx 1mSec 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 23 msec after the data is input if there is no error checking or 31 msec after the data is input if error checking is configured this assumes th
90. r from the Diagnostic serial port Connects to the remote modems diagnostic functions ATE Local Echo Control Enable Disable Command Echo Only applies to DB9 port RJ 45 port always has Echo enabled EO Disable Local Echo on DB9 serial port Ele Enable Local Echo on DB9 serial port ATF Set Radio Frequency FT Xxx xxxx Set Transmit Frequency xxx xxxx MHz Returns ERROR if outside radio range FR XXx Xxxx Set Receive Frequency xxx xxxx MHz Returns ERROR if outside radio range ATH Hang up Hook control End a call or disable incoming calls ATI Modem Identity Firmware version IOe Return Modem Firmware Version EG ELPRO E455U V2 3 I5e Return Full Information on modem including serial numbers and hardware version ATO Go to on line When connection established ATQ Quiet mode Suppress enable response codes RJ 45 port always has quiet mode disabled OOe Enable response codes on DB9 serial port Ql Disable response codes on DB9 serial port ATR RS 485 Serial Baud Rate selection R1 Set 600 baud R2 Set 1200 baud R3 Set 2400 baud R4 Set 4800 baud R5e Set 9600 baud R6 Set 14 400 baud R7 Set 19 200 baud R8 Set 28 800 baud R9 Set 31 250 baud R10 Set 38 400 baud Page 70 Jan 2007 Appendix A Hayes AT Commands R11 Set 57 600 baud R12 Set 76 800 baud R13 Set 93 750 baud For Profibus R14 Set 115 200 baud R15 Set 187 500 baud For Profibus ATSn Read value from S Register n Refer to Appendix C ATSn xx Set value of S Regis
91. rogram The communication 534 126 35 120 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 aa will 5 gt m ul ask you for a filename and will give a file extension of 55D example PLC57 55D To open an archived file select the one icon on the toblbar 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 Page 34 O Jan 2007 Chapter Three 3 4 Configuration Remote Configuration and Diagnostics Most of the configuration features of the 455U D modem can be accessed remotely over the radio network Remote configuration is accessed by connecting to the RJ 45 configuration port on the local modem and using either the configuration software or AT commands Refer to section 3 3 1 for information on setting up the PC Com port Before attempting to use this function ensure that remote configuration and diagnostics is enabled at the remote modem This selection is found under the Modem tab in the configuration package or use Hayes command AT A1 If a password is configured at the remote site ensure that this is known To access the
92. rol The DCD signal on the RS232 port can be used to give an indication of communications link status in Acknowledged mode Note that the link is always connected in unacknowledged mode Always On the 455U D sets the DCD to be always on Only High When Connected the DCD signal will be on when the link is connected and off when the link is reset Pulse Low on Disconnect the DCD signal will be normally on but will switch off momentarily for 0 5 sec when the link is reset 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 455U D then the module will transmit more than one message The default value is 1020 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 Packet size is configured via S Register 14 The value in S14 is multiplied by four to get the maximum packet size Transmit and Receive Hold off delay times A transmit delay time and a receive delay time can be configured These parameters may be used to fine tune and give priority to different 455U D units in a system e Transmit delay S16 After each message is transmitted a 455U D unit will not transmit another message durin
93. rox 50 of normal load and the modem will not receive or transmit radio messages When in low power shutdown mode the OK Led flashes red green at a 2Hz rate red 400 msec green 100 msec This is configured in the Modem General screen or using P 2 5 x the AT amp D Hayes command AT amp D3 to enable The use of this low power operation may be applicable in TE MEE OE Es remote locations where there is a limited power supply such RS4s5 S Registers Configuration Settings as solar panels In this situation the DTR signal from the pi ONE host device is used to wake up the 455U D unit The 455U D unit will then operate normally until the DTR ME ane charactor signal is reset by the host device Bon ia General Routing Other Encryption Disabled y AES Key SystemStrin In addition the modem will go to low power mode if the 12V supply becomes too low This feature is designed for battery backup use The 455U monitors its battery supply _ _ eS on connec o y and if the battery voltage falls below 10 7 volts for more ed EET than 5 seconds the modem goes to low power shutdown Ignore state The battery supply must rise back above 11 7 volts before the modem will exit low power shutdown mode disconnect and goto low P If the modem shuts down because of low voltage asserting DTR at the RS 232 port will not cause the unit to wake The unit can be forced to normal operation
94. s inactive If the internal diagnostics in the primary detects a fault or an operating problem the primary stops normal operation and the secondary becomes active The inactive unit is powered and operational however communications out of the unit via the radio transmitter and RS485 port is disabled Both units have the same configuration apart from primary secondary selection 1 2 Unacknowledged Mode The default configuration of the 455U D modem is unacknowledged mode the modules are set in this mode at the factory In unacknowledged mode units do not provide handshaking functions to control the flow of data Messages are not acknowledged and are sent UNACKNOWLEDGED MODE on a Best attempt basis ADDRESSED TO A PARTICULAR It is up to the host MEI equipment to determine if data is lost or corrupted To improve reliability in this mode units may be configured to send each message multiple times configured in S Register S29 The receiving unit will detect repeat messages and only send the data out the serial port once Each modem is configured with a separate unit address In Unacknowledged mode messages may be sent e toa particular modem by using the remote unit s address or Page 10 Jan 2007 Chapter One Introduction e to all modems in the system as a broadcast message by using the wildcard address 0 The wildcard address is used to send a message to a group of modems Data received at the serial
95. ses may IE be configured as part of the auto pelala iele connect address That is up to 6 intermediate modules can act as ae va Moda be ings repeaters between the master and aire aks Sytem Address Fees gj 524525 slave modules C Single Connect Unit Address 3 AT amp U Auto Connect Master EE Es Link Check Time out ide SE At the master unit you need to Auto Connect Slave Inactivity Timeout feo f ATT enter the address of the slave ene comic Select the RS232 Path section AS RS232 path Up to six repeater addresses may eee zo s2 be entered Repeater modules Modbus Master x RS4BE path may be configured in either i x Acknowledged or Unt Unit Unt Unit Unit Unit Unit Pot unacknowledged mode but 5 z P am they must have the same E Fal El aI Ad Cancel system address The repeater addresses are entered in order from the master that is the leftmost address is the first repeater after the master 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 Configurable via 30 If there is sti
96. ss is automatically entered into the RS485 path box You can use the wildcard address 0 if you wish to broadcast messages to all remote units You can have up to six repeater addresses If you are using repeaters then the left hand box is the first repeater address the repeater nearest to the transmitting modem followed by the second repeater etc If there is only one repeater then the repeater address is entered into the left hand box and the destination address in the second box If two repeaters then the two repeaters are entered into the two left hand boxes with the first repeater in the most left hand box and the destination address in the third box and so on For example if you want to set up a link to remote unit 12 via units 31 32 33 in this order TSO EE ele LIM xi Unit Unit Unit Unit Unit Unit Unit Port E y 32 y 23 y 12 y 7 z RSaes y ged If you want to use repeaters in broadcast transmissions refer to the section on Broadcast Repeaters If configuring with AT commands e the destination address for the RS485 port is in auto dial location 3 AT amp Z3 3 5 2 RS 232 Port The RS232 port can be configured for auto connect or single connect Auto connect means that the 455U D will start up online This will be indicated by the LINK LED going green Single connect means that the unit will start up in command mode and will not go online until it receives the correct AT comm
97. stablished e Must send Online command ATO to modem before communicating to other modems Hardware version 1 5 and later has extended LED functionality providing red amp green indication on the serial LEDs Earlier hardware support single color yellow serial LEDs Check hardware version using ATIS command The green OK LED on the front panel indicates correct operation of the unit This LED becomes red on failure as described above When the OK LED becomes red shutdown state is indicated On processor failure or on failure during startup diagnostics the unit shuts down and remains in shutdown until the fault is rectified 4 3 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 455U 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 If a system gives poor performance after it is installed check the adequacy of the radio path refer
98. store and forward Messages to protocol address 13 are sent directly to the modem with address 13 Routing Paths Protocol Addr 0 1 Unit Uni Unit Unt Une Unit Unit Pot 10 1 RS232 TE 10 1 12 R 232 2 Ti 13 R 232 Configuring for Modbus Protocol RTU or ASCII With Modbus protocol the master station does not have an address This means that for each remote you need to configure a path back to the master station which uses the remote s own address as the Protocol address At the master station you must configure a path to each remote station using the address of the remote station as the protocol address Modbus RTU Protocol When configured for Modbus RTU Protcol the modem ignores the configured Rx Timeout value and sets it to the correct value for the modbus RTU protocol Modbus ASCII protocol The correct value for serial timeout in the Modbus ASCII protocol is 1 second hower this is normally too long Setting the serial timeout value to 0 causes the actual serial timeout to be 1 second Otherwise the configured value is used Unless your application requires the 1 second serial timeout select PLC mode to set a good value for serial timeout DF1 protocol The 455U works with DF1 Half Duplex protocol Some DF1 Half Duplex frames are only sent from a slave to a master These frames do not include a destination address For DF1 protocol to work the DF1 Half Duplex master must be configured with address 0
99. t in rame Joe ae 1 DCD Out Data carrier detect driven when link is established in Acknowledged mode driven when module is online in unacknowledged mode 2 RD Out Transmit Data from modem Serial Data Output Receive Data into modem 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 Acknowledged mode 5 Signal Ground Out Clear to send hardware flow control configurable RI Out Ring indicator indicates another module is attempting to connect in Acknowledged mode ON NN DN NN 2 2 2 2 RD RD RD RD 3 3 3 EE TD 5 5 TD TD 5 5 TD SG 7 7 SG SG 7 7 SG RTS 8 8 RTS RTS 8 8 RTS CTS 6 CIS CTS 6 CTS DSR 4 DSR DSR XA DSR DTR 1 DTR DTR 1 DTR DCD DCD DCD DCD ee et A a 455U DTE HOST 455U DCE HOST DB9 DB9 DB9 DB9 MALE FEMALE MALE MALE Page 26 O Jan 2007 Chapter Two Installation 2 4 2 RS232 Configuration Port The serial port is a 9 pin DB9 female and provides configuration and diagnostics of both the local module and of other modules in the system wile the primary RS232 port is active This port is wired as a DCE according to EIA 561 The following table describes the connections required to connect to a PC serial port The highlighted entries in this table are those essential for operation of the Configuration port
100. t should carry clear markings to indicate remote or automatic operation eg This eguipment is remotely controlled and may start without warning Isolate at the switchboard before attempting adjustments 3 The 455U D module is not suitable for use in explosive environments without additional protection 4 All antenna installation and servicing should be done by qualified personal only When installing or working near the antenna it is important to ensure that the transmitter is not operating ensure the transmitter is disabled 5 The antenna can have very high RF radiating fields and must be installed so that under normal operating conditions that a person cannot approach within 2 3 metres 7 5 feet of the antenna See chapter 2 for antenna installation guidelines Page 4 Jan 2007 Contents CONTENTS AS de OER RE OE N N N EN 4 CHAPTER ONE INTRODUCTION esse sesse se ee ee ee ee 8 1 1 GENERAL ua aaa aaa 8 VA BASIC Operation ss us Ee ed SG Ee eN eal De Ge 9 11 2 Operating Modest 9 1 37 Rep ater Puncuona llendo tio cto ten ali oe REDES ER EERS se take 10 1 1 4 Hot Redundant Standby eiii iaa 10 1 2 UNACKNOWLEDGED MODE ee esse ee ee se ee se se ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 10 1 3 ACKNOWLEDGED MODE amp iss Eis Ese ee Ge bee Ee ee see Ge Ee ve Se se ee Se be Ee be se see la Eyes eis 1 1 4 SECURITY ENCRYPTION daa De Ge Ge ea ei eet 14 1 5 SERIAL AND RADIO DATA siones 14 ESH E EO SEE SE DE EE EE RD DE BA E
101. t will print the message OK and wait for commands The host software chooses which remote module to configure by issuing a dial command ATD As soon as the Dial command is issued the modem will issue a Connect message and go on line This will be indicated by the LINK LED going green All messages received at the RS 232 serial port are sent to the dialed address Use the wildcard address 0 or 128 to send messages to multiple units in the system 3 5 3 Unacknowledged mode Repeaters Every 455U D module automatically acts as a repeater by including its address in the address list For example if unit 31 receives a message with address lt 31 15 gt it will repeat the message onto unit 15 Unit 31 will not output the message on its serial ports If you are using repeaters for broadcast messages care must be taken Page 38 Jan 2007 Chapter Three Configuration Broadcast Network You may want a multi hop network to broadcast messages This takes some care at the repeater nodes to ensure that individual repeaters do not repeat messages that they have already repeated and also to avoid a end node receiving the same message multiple times Note Before deciding to implement a multi hop broadcast network check the section below on Optimum Path Routing If your communication uses Modbus DF1 or DNP3 protocols OPR may be a better way to implement your network You can set up a broadcast network by using addr
102. ter n to xx Refer to Appendix C ATV Verbal Numeric Response Codes RJ 45 port always has verbal responses VO Numeric response codes on RS 232 serial port Vie Verbose response codes on RS 232 serial port ATX Extended Response Codes Allows more detailed response codes including connection speed XOe Basic response codes only X1 X0 Connection Baud rate codes CONNECT 19200 CONNECT 57600 X2 X1 BUSY Message X3 X2 RINGING Message ATZ Reset the modem and re load the configuration stored in non volatile memory AT A Remote Configuration and Diagnostics Access Mode HA0e Disallow Remote Access FA1 Allow Remote Access Password required if configured Use password command AT P to change password AT B Perform BER Bit Error Rate test to specified address AT B 1 2 3 4 to do BER test to site 4 via 1 2 and 3 AT C Radio Calibration Options Can only be accessed when R Password entered CO Calibrate Power level for Power setting 0 C1 Calibrate Power level for Power setting 1 C2 Calibrate Power level for Power setting 2 C3 Calibrate Power level for Power setting 3 C4 Calibrate Radio Frequency offset C5 Calibrate Radio Deviation C6 Calibrate Radio Modulation Balance C7 Calibrate Radio RSSI Using Radio TestSet C8 Calibrate Radio RSSI Set default Calibration or enter actual values Man_455U D Rev 3 00 Page 71 455U D Radio Modem Module User Manual AT E EOe E1 E2 AT N AT O 00 01 02 AT P AT R A
103. tes tee Ee os fea ee eg ee De n GR ee Ge Hotes teks ee ee tees eek Ged N ed 57 Page 6 Jan 2007 Contents 44 1 Bit Errot Ratio Test BER ii ari ola Pe Scales Hake bee SG Mines ede 57 442 Othi r Radio Testing SA TEER Ee RE GR ee GE EG ee Se RE EE 58 44 3 On line didenOSHES ee oe ese es Ge De ee EG Sows gets Gee ee gee Ge ee 59 4 5 RADIO PATH TESTING esse ee esse ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee Re ee ee ee ee ee ee ee 61 4 6 CHANGING THE RADIO PARAMETERS eise ese ee ee se ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 62 4 7 DIAGNOSTIC MESSAGES c0ccccccccccccsesssssceccccceesssssescecccssssseususesccssssaueususecesceseeeeea 63 4 8 DUAL REDUNDANCY RR ER OE OE ER EE N sues 64 CHAPTER FIVE SPECIFICATIONS cccccccssssssssssssssssssssssssssssssssssssssssssssssssssscees 66 CHAPTER SIX WARRANTY amp SERVICE ccccscsssssssssssssssssssssssssssssssssssssssssscees 68 APPENDIX A HAYES COMMANDS sesse sesse see se see ee ee ee ee ee ee see ee ee ee ee Ge Ge Ge Ge Ge Ge ee 69 APPENDIX B RESPONSE CODES o ccccccononononononononononononononononononononoconononononinocicininininonosos 78 APPENDIX C S REGISTERS cocococononononononononononononononononononononononoconononocononiconiconinininonosos 79 Man 455U D Rev 3 00 Page 7 455U D Radio Modem Module User Manual Chapter One INTRODUCTION 1 1 General The 455U D radio modem provides reliable radio modem operation with advanced
104. tions on the other port by introducing delays in message transmission 1 7 Optimum Path Routing Optimum Path Routing OPR is an advanced feature providing fast and efficient radio networking OPR is a protocol specific feature using the link layer of a variety of host protocols allowing routing of messages for up to 64 different host addresses Supported host protocols are DEFI half duplex master and slave e Modbus Master and Slave RTU and ASCII formats Profibus Peer to Peer and DNP3 peer to peer Under OPR a path is configured for each host protocol address comprising the 455U destination address and any 455U repeater addresses in the path When the 455U unit receives a data message from its host the 455U will interrogate the message for the host destination address and use the pre configured OPR path to send the radio message For more information refer to section 3 of this Manual Page 18 O Jan 2007 Chapter One Introduction 1 8 Duty Cycle Limiting Some licenses require that the modem limits its communications so that it is transmitting for no more than a maximum proportion of the available time This applies to European 500mW unlicensed bands where the modem must limit its duty cycle to 10 Duty cycle limit is set to 100 except for modems which are configured for the European limited duty cycle bands To change the duty cycle limit use the AT D command AT D100 for 100 Duty cycle li
105. to reconnect again until it receives another connect command from its host The link is normally disconnected by the host issuing a disconnect or hang up ATH 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 six repeater addresses may be configured as part of the remote address That is up to 6 intermediate modules can act as repeaters between the master and slave modules Man_455U D Rev 3 00 Page 45 455U D Radio Modem Module User Manual The RS232 DTR signal can be configured to act as a disconnect signal If so configured AT amp D the DTR signal will force a hang up DCD reset if the host device resets the DTR signal In single connect Acknowledged mode the host devices use AT commands to select destination addresses to connect to Normally the only configuration required is a unit address 3 8 Dual Redundant Standby Two 455U D units can be connected together in a hot redundant standby arrangement One unit configured as a Primary is normally active and the Secondary unit is inactive If the Primary detects an internal fault or operating problem then the Primary unit becomes inactive and the Secondary becomes active Dual Redundant Standby mode is implemented in Firmware versi
106. tor If the module is not at one end of the RS485 cable the switch should be off 2 5 Discrete I O Point The 455U D provides a single connection which can be used as a discrete input for alarms or a discrete output to control remote equipment 2 5 1 Using the Discrete I O as an Output When using the DIO pin as an output it acts as an NPN transistor to common It can be wired to an indicator or alarm 12 DO 0 max 30VDC 500mA or to a relay to remotely operate Spiscrete equipment The output is controlled using the AT O Papes command AT OO turns off AT O1 turns on Max 30VDC 0 5A Load 2 5 1 Using the Discrete VO point as an Input When using the DIO pin as an input it is activated by connecting the DIO pin to COMMON This can be done using a voltage free contact Relay or Switch or a NPN transistor to common To read the Voltage free status of the Input ensure the output Concer pl function is disabled AT O0 and read S Register 33 gt Note The DIO channel is not available when the 455U unit is part of a Dual Redundant pair Page 28 Jan 2007 Chapter Two Installation 2 6 Dual Redundant Installation Two 455U D units can be connected together in a dual redundant arrangement One unit configured as a Primary is normally active and the Secondary unit is inactive If the Primary detects an internal fault or operating problem then the Primary unit becomes inactive and the Secondary becomes active
107. tting amp H1 Perform the action specified by the AT amp R setting when the wildcard address is the first Store amp Forward address and the message has completed one hop amp H2 Perform the action specified by the AT amp R setting when the wildcard address is the second Store amp Forward address and the message has completed two hops amp H3 Repeat Messages when the wildcard address is the third sixth Store amp Forward amp H6 address and the message has completed three six hops AT amp K RS 232 Serial port Flow Control Configuration Flow control options are none CTS RTS and XON XOFF In Acknowledged mode flow control passes across the modem link as the local buffers become full then back to the remote host device as the remote modem s buffers become full No Flow control is provided on the RS 485 port Man 455U D Rev 3 00 Page 73 455U D Radio Modem Module User Manual amp KOe amp K1 amp K2 amp K3 amp K4 AT amp L amp LOe amp LI amp L2 AT amp M amp MOe amp M1 amp M2 amp M3 amp M4 Page 74 Flow Control Disabled CTS Always high Modem ignores RTS CTS RTS Flow Control CTS follows RTS high if there is space in the local buffer Otherwise CTS goes low On Serial Transmit CTS goes high and waits for RTS to go high before transmitting Note Currently not implemented Behavior is as for amp K3 CTS RTS Flow Control CTS Reflects the state of the remote buffer AND
108. ue already selected if the module is to become part of an existing system then you must select the same system address as the existing modules Select a unit address for the module Giving each module a unique unit address allows the modules to be accessed over the radio using remote configuration and diagnostics 3 5 1 RS 485 Port The RS 485 port always operates in Unacknowledged mode and starts up online If you are using the Configuration software click on the RS485 path box a destination selection panel will appear In the right hand box select the destination port type RS232 or RS485 If there are no 455U Configuration Utility File Communication Help S Eo ajaj 2 Operating Mode Mode Settings AS485 S Regis gt Unacknowledged Mode Radio Stats Re ER ed Sytem Address 5863 524 525 Single Connect Unit Address fi AT amp U Radio Statistics Acknowledged Mode Auto Connect Master Digital 1 0 Auto Connect Slave Temp Single Connect Alarms R5232 path Battery Voltage 20 Supply Volt R5485 path MEE z3 ao ooo Receive level Serial Communications AA Unit Unit Unit Unit Unit Unit Unit Port 2 ay mi al al El mal rales al Cancel DK Page 36 Jan 2007 Chapter Three Configuration repeater addresses select the destination module use the unit address in the left hand box Do not select these boxes When you click OK the remote port addre
109. ults perform the following 1 Set the switch to Default down position 2 Turn off module power 3 Turn module power back on 4 Return the switch to the up position The module will now be configured for 19 200 baud communication on the RS232 DB9 port Man_455U D Rev 3 00 Page 53 455U D Radio Modem Module Chapter Four 4 1 User Manual TROUBLESHOOTING Power up and Normal Operation When power is initially connected to the 455U 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 LED Indicator Condition Meaning OK Green Normal Operation Off Power Disconnected or Battery Over voltage Red Low Supply voltage or Internal Module fault Radio RX Green flash Radio receiving data Red flash Weak radio signal Radio TX Flash Radio Transmitting RS232 Yellow flasht RS232 Serial Port Activity Older version Hardware t Orange flash RS 232 port receiving and transmitting simultaneously Red flash RS232 serial port transmitting data to host device Green flash RS232 serial port receiving data from host device RS485 Yellow flasht RS485 Serial Port Activity Older version Hardware t Orange flash RS 485 port receiving and transmitting Red flash RS485 serial port transmitting data to host device Green flash RS485 serial port receiving d
110. wer Supply To operate this equipment legally the user must operate on a designated license free radio channel and within the operating parameters of the license free channel or obtain a radio operating license from the responsible government agency This is done so the government can coordinate radio users in order to minimize interference Before installing a new system it is preferable to bench test the complete system 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 455U D Module as a repeater The foldout sheet 455U D Installation Guide provides an installation drawing appropriate to most applications Further information is detailed below Each 455U D module should be effectively earthed via the GND terminal on the 455U D module this is to ensure that the surge protection circuits inside the 455U D module are effective 2 2 Antenna Installation The 455U D module will operate reliably over large distances The distance which may be reliably achieved will vary with each application depending on the type
111. y send pseudo random frames and the receiving unit will check these frames for errors The receiving unit returns a response message indicating how many if any errors were found The test results are displayed on the sending unit To test Communication to slave station 13 enter AT B13 To test slave station 14 using station 13 as a repeater AT B13 14 etc An example of the sending unit s display is here Test Errors Extra Level TotErr TotMissed TotTest 109 0 0 77dBm 3 0 109 kbit Occasionally during testing the following may be displayed Test Errors Extra Level TotErr TotTest No Response This indicated that either the request to the responding device or the response from that device was lost during transmission lost data frames do not contribute to the bit errors which are calculated only on the 1 000 bit frame 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 When using directional antennas Y AGI antennas this feature may be used to align the antenna in the correct direction by selecting the peak signal level when moving the antenna Begin the BER test AT Bxxxx and observe the signal strength indication Level while adjusting the orientation of the antenna A peak in signal level indicates optimum orientation of the antenna 4 4 2 Other Radio Testing AT am

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