COMETH-FIELD-RD USER'S GUIDE
Contents
1. pq IWISTED PAIRS COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 18 COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 V V 1 19 GETTING STARTED This chapter describes the required steps to get COMETH device on line and working Determine the needs of your application e Serial data format and baudrate e Serial control signals driving source e Electrical type of your serial interface e What kind of application will use the COMETH This will determine the COMETH firmware to use as follows Firmware selection criterions Firmware use DOWNLOAD upgrade the other firmwares MODBUS for MODBUS TCP or MODBUS tunnelling SERVERCOM for COM port emulation or raw data tunnelling TCPCLIENT allows a serial device to call in a network server or raw data tunnelling MULTIPOINT for multidrop applications and master slave replacement If you want to use the MODBUS protocol e inany case you can use the COMETH MODBUS firmware if there is only one serial master and one serial slave or several serial slaves all connected on the same RS485 cable you can also use a couple of SERVERCOM and TCPCLIENT e if the masters are on the network not on a serial link they use MODBUS TCP you must use the COMETH MODBUS firmware on the slave side only if the slaves are scattered among several access points in the netwo2. If DHCP is not used e P address for the COMETH see below Does your LAN need use of a netmask Netmask value e Will the data connection or the admin Gateway address connection cross a gateway COMETH IP address You must assign an IP address to the COMETH YOU CANNOT JUST PICK ONE AT RANDOM and wish it will work The chosen address must meet the following requirements e Its network part must match the network part of other devices on the same LAN e Its host part must be different from any other devices on the same LAN beware of printers routers and gateways e Its host part must not be a reserved value like 0 or 255 NETMASKS If no netmask applies it can be deduced from the IP address class Class A netmask 255 0 0 0 Class B netmask 255 255 0 0 Class C netmask 255 255 255 0 If in doubt please ask to the local Network Administrator V 3 Connect power adapter Connect the power supply to the COMETH Notice COMETH has no ON OFF switch It turns on automatically when power supply is connected COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 21 V 4 Administration by RS232 serial port This is the recommended procedure to install a new COMETH In some cases you can install a new COMETH through the LAN refer to paragraph V 5 Administration by LAN V S V 4 1 Select Administrator mode Push the switch towards t
3. Release A 7 February 22 2010 34 Setting displaying a group of parameters The following commands allow to retrieve and set globally the COMETH configuration Security note sensitive data like login and password information are conveyed in clear text by the following commands You must take any step to protect these data from disclosure As a basic protective step the commands themselves can only be used by a logged in operator Usage note Some data conveyed by these commands should be kept unique to a COMETH This applies especially to the IP and MAC addresses in the common parameters You should either avoid to change this unique data or to restore them after using the set commands Usage note Some parameters take effect immediately as specified elsewhere Beware that the parameters you change do not affect the COMETH at the moment you set them For example if you change the DHCP Client Id this will take effect at the next lease expiration which could happen soon If you change the MAC address it could adversely affect ARP responses if such a request is received For these reasons a set common command should be followed by a save and a reset command set default restore factory defaults except the MAC address the save count the current firmware and the next firmware to run set common offset hex hex hex insert the specified values in the data area which holds all the configuration par
4. COMETH FIELD RD USER 5 GUIDE COMMUNICATIONS amp SYSTEMS COMETH FIELD RD USER S GUIDE COPYRIGHT O ACKSYS 2003 2010 This document contains information protected by Copyright The present document may not be wholly or partially reproduced transcribed stored in any computer or other system whatsoever or translated into any language or computer language whatsoever without prior written consent from ACKSYS Communications amp Systems ZA Val Joyeux 10 rue des Entrepreneurs 78450 VILLEPREUX FRANCE REGISTERED TRADEMARKS amp e ACKSYS is a registered trademark of ACKSYS e Windows is a registered trademark of MICROSOFT NOTICE ACKSYS gives no guarantee as to the content of the present document and takes no responsibility for the profitability or the suitability of the equipment for the requirements of the user ACKSYS will in no case be held responsible for any errors that may be contained in this document nor for any damage no matter how substantial occasioned by the provision operation or use of the equipment ACKSYS 9 reserves the right to revise this document periodically or change its contents without notice ACKSYS COMMUNICATIONS amp SYSTEMS ZA Val Joyeux 10 rue des Entrepreneurs 78450 VILLEPREUX FRANCE Telephone 33 0 1 30 56 46 46 Fax 33 0 1 30 56 12 95 Web www acksys fr Hotline support acksys fr Sales sales acksys fr COMETH FIELD RD USER S MANUAL 503
5. Else the COMETH can receive the PING but does not know where to send the answer COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 30 VI 3 Checking the configuration When you can PING the COMETH you should be able to use remote administration Try to connect to the administration system C gt telnet 192 168 1 253 If the connection is refused another TELNET is already connected to the COMETH You can also use the asynchronous port administration Please refer to section V 4 Administration by RS232 serial port to do this VI 4 Checking the software At this step the COMETH network parameters are correctly set Any other problem remaining must come from either the remote side configuration driver or software or from mismatched configuration between the COMETH firmware in use and the remote side So please now refer to the relevant COMETH firmware user guide for further troubleshooting COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 sad VII ADVANCED CONFIGURATION 1 Access to administration commands You can access the administration system by two means the RS232 interface or TELNET through the LAN The RS232 administration is activated by pushing the ADM switch to the ON position This forbids parallel use of the COMETH for data transfer The TELNET administration is activated by TELNETing to the IP address of the COMETH on port 23 which is the
6. J2 B J1 73mm 93mm IL10 Differences between COMETH FIELD RD rev and rev B Two versions of the COMETH FILED RD device exist COMETH FILED RD rev A and COMETH FILED RD rev B The differences are COMETH FIELD RD rev A COMETH FIELD RD rev B Consumption max 1 1W 2W Ethernet link 10 BASE T 10 100 BASE T 2 LEDs for Ethernet 1 Led for 10 Base T link 1 Led for Tx Rx activity 1 Led for 10 Base T link and activity 1 Led for 100 Base Tx link and activity Terminating resistor for RS422 485 A jumper A switch Dimensions L W H 93 00 x 73 00 x 28 00 mm 93 00 x 73 00 x 29 00 mm COMETH FIELD RD USER S MANUAL 5036 Release A 7 February 22 2010 11 HI CONNECTORS HII POWER connector cabling J3 Screw terminal connector 3 pins PIN Signal name Description 1 EARTH Protective ground 2 VDC Positive power supply 3 GND Ground power supply III 2 Ethernet connector cabling J6 RJ45 connector 8 pins PIN Signal name Direction 1 TxD Output 2 TxD Output 3 RxD Input 4 N C Not Connected 5 N C Not Connected 6 RxD Input 7 N C Not Connected 8 N C Not Connected COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 12 3 RS232 connector cabling J1 DB9 male with DTE cabling PIN Signal name
7. cccsseecccceseececcescccecceseececceneececeeneese 21 V 5 ADMINISTRATION BY 0 020000000 000 066 21 TCP IP 9 22 V 7 ACTIVATE THE RELEVANT 000000 25 V 8 INSTALL THE COMETH INITS 000000000000000000 25 V 9 OTHER 26 COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 VI TROUBLESHOOTING 27 VL CHECKING THE 27 2 CHECKING THE NETWORK TOPOLOGY 00000 29 VI3 CHECKING THE CONFIGURATION ccsseeccccsseeccccssceccccseececceseececcseeceeceneeseceeneess 30 VI 4 CHECKING THE 30 VII ADVANCED CONFIGURATTION 31 VIL1 ACCESS TO ADMINISTRATION COMMANLDS 000000000000 31 MIT ISEGURIDY 22224 a ee eere ne b bete Ve bau huu t e tente ese ide ue 31 VIL3 HANDLING DISCONNECTIONS IN a a 31 VILA COMMANDS LIST Q eee eere e A S eben ee pee usu idee 32 VIL5 F
8. Direction 1 DCD Input to Cometh 2 RxD Input to Cometh 3 TxD Output from Cometh 4 DTR Output from Cometh 5 GND Digital ground 6 DSR Input to Cometh 7 RTS Output from Cometh 8 CTS Input to Cometh 9 RI Input to Cometh 4 RS422 RS485 connector cabling J2 DB9 female 5 1 i O OO O 9 6 PIN RS422 RS485 1 Connect together for Connect together for line 2 line polarization polarization 3 B TxD Unused 4 RxD BB TxD RxD 5 Digital ground Digital ground 6 Connect together for Connect together for line 7 line polarization polarization 8 A TxD Unused 9 A RxD AA TxD RxD For COMETH FIELD RD rev A Terminating resistor enable Connect the jumper to ON position Terminating resistor disable Connect the jumper to OFF position or left unconnected For COMETH FIELD RD rev B Terminating resistor enable Switch to ON position Terminating resistor disable Switch to OFF position COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 PER IV CABLING RECOMMENDATIONS IV 1 Ethernet cabling recommendations Plug the Ethernet jack from your HUB into the COMETH The COMETH does not normally require a crossing cable If the Ethernet cable is good and correctly inserted on both ends the LINK light should go on on the COMETH and also on the HUB if it has a LINK led IV 2 RS232 cabling recommendations In RS232 mode th
9. Tx activity For COMETH FIELD RD rev B Power Diagnostic general purpose mode error detection reboot indicator Asynchronous interface Rx Tx activity 10 Base T Link and interface Rx Tx activity 100 Base Tx Link and interface Rx Tx activity IL6 Switches One switch allows asynchronous serial interface mode selection Administration Data 7 Environmental limitations Operating temperature 0 C to 65 C Storage temperature 40 C to 85 C Humidity 0 95 RH without condensation COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 IL8 Product information label Located on the underside of the COMETH it contains the following information e Product name e Ethernet MAC Address Also used as product serial number IL9 Mechanical characteristics Metal housing Weight 0 120 Kg For COMETH FIELD RD rev A 2 38 ACKSYS www acksys fr AN M E ACKSYS 33 0 1 39 11 6281 gt AA DIN RAIL OMEGA passed Made in France C Diag Power Supply Connector COMMUNICATIONS amp SYSTEMS Serial Tx Rx 9 36 VDC 1 1 W Max Link 1 322 COMETH FIELD RD Lan Tx Rx 100 Base T HT Pin Signal Name I EARTH Mac Address 2 VDC 3 GND 88mm a Pin RS422A Signal 9485 Signal RS232 Signal Direction 1 Connect together 1 DCD Input to Cometh 9 2 tor line polarizatio
10. address Correct the problem If the answer is some message like no route to host the computer you are using for the test has no access to the COMETH s LAN or the network part of the IP address of the COMETH is incorrect e Now reconnect the COMETH to the LAN and try to PING it C gt arp d 192 168 1 253 C gt ping 192 168 1 253 Pinging 192 168 1 244 with 32 bytes of data Answer from 192 168 1 253 bytes 32 time lt 10ms L 64 Answer from 192 168 1 253 bytes 32 time lt 10ms L 64 Answer from 192 168 1 253 bytes 32 time lt 10ms L 64 Answer from 192 168 1 253 bytes 32 time lt 10ms L 64 If there is no answer the IP address of the COMETH is not this one Correct the problem with the administration system Be sure to save the changed configuration e Then if you need to cross a gateway PING the COMETH from a computer installed on the other side of the gateway DO NOT just move the above mentioned computer from one LAN to the other You must set a new appropriate IP address in the computer when you move it from one LAN to another If there is no answer the gateway IP address or the netmask is improperly set in the COMETH or in your computer Correct the problem with the administration system Be sure to save the changed configuration and reset the COMETH Also the gateway itself may be improperly set Check with your network administrator Did you set the gateway address if any in the COMETH
11. etc The LAN layer address allows a device to send data to another device connected to the same LAN But there is not enough information in a LAN address to send to a device connected on another LAN through a router The Network IP address solves this problem by defining addresses which can be subject to routing When the source and destination devices are not on the same LAN the source device can send data to an intermediate gateway also called router The gateway has routing tables which allows it to forward data to the destination device maybe through other gateways The transport layer address called a port is used inside a destination device to deliver data to the correct application process VIII 2 Ethernet Address The Ethernet address is also referred to as the hardware address or MAC address The first three bytes are fixed to Hex 00 09 90 and identify an ACKSYS product The last three bytes are specific to each COMETH product This address is assigned at the factory and should not be changed An Ethernet LAN can be made of hubs switches bridges These must not be confused with IP gateways see below VIII 3IP address The IP address is a 4 bytes number unique to each device on the network which hosts can use to communicate IP addresses can be private or public Public ones are reserved to devices that require to send data over a public network such as internet They are usually purchased or leased from a l
12. segment timout feature defines a maximum delay after which the TCP connection will close dropping the current data and possibly control signals on the asynchronous serial port on the assumption that the client will reestablish the connection when it detects that it was lost The set net keepalive command also sets the segtmo parameter for a corresponding amount of time The set net segtmo and show net segtmo commands allow you to set up this parameter independantly Forced reconnection The reconnect feature as an alternative to the keep alive mechanism allows the Cometh to accept unconditionally at any time a new connection request emanating from the same IP address as the currently opened connection this one is then closed immediately The set net reconnect and show net reconnect series of commands allow you to set up this mechanism Security note Although the forced reconnection method seems more attractive than keep alive it may lead to security weakness that should be carefully considered in sensitive environments since connection request packets may be forged by a malevolent user on an open network a denial of service to the legitimate user can be induced when this feature is used VII 4 Commands list General purpose commands login username save reset quit start the administrator identification sequence Ask password save the current configuration to the permanent conf
13. 02 0000000 00000 0 11 2 ETHERNET CONNECTOR 6 0 11 RS232 CONNECTOR CABLING J 12 4 RS422 RS485 CONNECTOR CABLING J2 a 12 CABLING RECOMMENDATION S 13 IV 1 ETHERNET CABLING 8 0 13 2 RS232 CABLING 85 2 13 IV 3 RS422 RS485 CABLING RECOMMENDATIONS 13 IV 4 CABLE LENGTH FOR RS422 AND 5485 14 IV 5 RS422 CABLING EXAMPLE 6 15 IV 6 RS485 CABLING 2 0 0 17 GETTING STARTED cuo cens xcu cose ccuo unc exco so nn ie uo n n nu n oo c o n i i o o oe e uo au eu un o 19 V DETERMINE THE NEEDS OF YOUR 000 0 0 19 V 2 COLLECT NETWORK 5 20 V 3 CONNECT POWER 020 2 0 0 20 V 4 ADMINISTRATION BY 85232 SERIAL PORT
14. 3 IP Protocols ARP IPv4 ICMP UDP TCP DHCP Telnet RFC 2217 Two TCP ports port 23 for TELNET administration one UDP port port 68 when DHCP is used other TCP and UDP ports available and configurable for data exchange 4 Serial interface The serial interface mode is selectable by the COMETH administration mode You can use RS232 or RS422 RS485 but not both simultaneously COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 II 4 1 RS232 Full RS232 EIA TIA 574 Serial interface DB9 male connector with DTE pinout Control signals TxD RxD RTS DTR CTS DSR DCD and RI signals Maximum RS232 distance 15 meters Speed 10 to 230400 bps Parity none even odd space or mark Data bits 7 or 8 Stop bits 1 or 2 4 2 RS422 RS485 EIA RS422 RS485 CCITTV11 Serial interface DB9 female connector Control signals TxD RxD Built in automatic turn around Line polarization selection by strap Terminating resistor selection by jumper Maximum load in RS422 10 receivers Maximum load in RS485 32 receivers Maximum transmission distance 1200 meters at 115200 bps Speed 10 to 230400 bps Parity none even odd space or mark Data 7 or 8 bits 1 or 2 stop bits IL5 Ledindicators Five LED indicators For COMETH FIELD RD rev A Power Diagnostic general purpose mode error detection reboot indicator Asynchronous interface Rx Tx activity Ethernet LINK active indication Lan interface Rx
15. 6 Release A 7 February 22 2010 zie COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 IV iii TABLE OF CONTENTS INTRODUCTIONS S Su G I I I i G 1 SG 5 11 PURPOSE OF THIS 5 1 2 THESOEDWARE N Q 6 PRODUCT SPECIFICATION S 7 CHARACTERISTICS ett ot ettet e ett awu aP 7 2 POWER net nn A au oa Satu akampa manu aan o bo o aa ON edere te 7 1 3 IZAIN INTEREACE 7 ILA SERIAE INTEREACE ite eoe suhu qun eee eee erede ces 7 IS EEDTNDICATORS it dee de ect ete ea de de ee i ed de eei edes 8 II 6 SWITCHES 2 does R SS haqa 8 IL 7 ENVIRONMENTAL LIMITATIONS ccccseccssccccssccccecccsscccsscceusccccsseeaeeccceceesecsesseceees 8 8 PRODUCT INFORMATION LABEL ccseccccccsececcccesceccccscceccesseccccnseecenseseeceaneeecees 9 9 MECHANICAL CHARACTERISTICS 00 9 10 DIFFERENCES BETWEEN COMETH FIELD RD REV A AND REV 10 CONNECTORS Ra apa oc Hasan De eR SENEC 11 HLI POWER CONNECTOR CABLING 3 00000
16. ACTORY SETTINGS COMMON TO ALL 36 VIII ADDRESSING IN NETWORK PROTOCOIL 37 1 TCP IP NETWORK 5 000 60000000000000000 37 VIIL2 ETHERNET 6586 2 37 NUES ZIP ADDRESS toe A te E te 37 MATE A GATEWAYS oder oe Mit 38 TCP PORT NUMBER dy coded Ma Lean tee NG Mas 38 IX 39 COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 I INTRODUCTION L1 Purpose of this manual This manual provides instructions to easily install and configure the COMETH product on your network Chapter II Product specifications describes the fundamental possibilities of the product Chapter III Connectors describes the Serial and LAN connectors of the COMETH Chapter IV Cabling recommendations gives some background required to install the COMETH Chapter V Getting started is a step by step description of a typical COMETH installation in a simple application context Chapter VI Troubleshooting gives hints on what to do when the installation fails Chapter VII Advanced configuration describes all the configuration parameters you can use and how to use them Chapter VIII Addressing in Network protocols gives some backgr
17. INT CABLING RS422A INTERFACE FOR POINT TO POINT LINK A 8 5 DB9 Pin il O RS422A INTERFACE FOR POINT TO POINT LINK A 8 D O le B 3 O A 9 15 IW STE D PA RS COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 16 RS422A FULL DUPLEX MULTIDROP CABLING RS422A INTERFACE FOR MASTER TYPE MULTIDROP LINK POLLING SELECTING RS422A INTE E FOR INTERMEDIATE SLAVE TYPE MULTIDROP IWISTED RS422A INTERFACE FOR TERMINAL SLAVE TYPE MULTIDROP COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 IV 6 RS485 cabling example RS485 HALF DUPLEX MULTIDROP CABLING INTERFACE RS485 FOR MASTER TYPE MULTIDROP LINK POLLING SELECTING D A A 9 O gt Qi P lt Re DE REB VCC 5 1 RS485 INTERFACE FOR INTERMEDIATE SLAVE TYPE MULTIDROP LINKS POLLING SELECTING D A A lt lt 45 250 4 B B DE REB GND O 5 2 RS485 INTERFACE FOR TERMINAL SLAVE TYPE MULTIDROP LINKS POLLING SELECTING
18. NUAL Release A 7 February 22 2010 Parameters display 357 Displaying the configuration parameters is allowed if the showperm parameter is set to allow If it is set to deny the configuration parameters can only be displayed by the administrator after logging in Some parameters can be displayed for your information but cannot be changed show version show location show showperm show netconfigperm show savecount show net ethernet show net dhcp show net dhcp clientid show net dhcp hname show net ip show net mask show net gateway show net configport show net txsize show net rxsize show net metric show net keepalive show net segtmo show net reconnect show prog info Seg show prog data Seg show prog list show prog enable firmware version physical location of the COMETH is anybody allowed to display configuration allowed denied is it allowed to administer from the network allowed denied number of times the save command has been used assigned Ethernet address DHCP use on off value enforced on DHCP option 61 if any value assigned to DHCP option 12 if any assigned IP address local subnet mask default gateway IP address administration port telnet 23 max size of sent frames max size of received frames number of allowed gateway hops for outgoing traffic 0 255 keepalive parameters as n probes 1 42 sec else off segment retransmission t
19. ameters common to all firmwares in the COMETH This command should be copied and pasted from the output of the corresponding show command below Its purpose is to copy exactly a COMETH s configuration in another COMETH or to restore a lost configuration show common offset display all the configuration parameters common to all firmwares in the COMETH offset must be 0 The purpose of this command is to display the set common commands see above necessary to fully restore common parameters in a COMETH set local offset hex hex hex insert the specified values in the data area which holds all the configuration parameters specific to one of the firmwares in the COMETH This command should be copied and pasted from the output of the corresponding show command below Its purpose is to copy exactly a COMETH s configuration in another COMETH or to restore a lost configuration BEWARE There are as many parameter sets as firmware segments in the COMETH FLASH EPROM The same firmware can be downloaded in several segments in the COMETH for example for testing purpose In this case there will be several parameter sets for this firmware show local offset display all the configuration parameters specific to one of the firmwares in the COMETH offset must be 0 The purpose of this command is to display the set local commands see above necessary to fully restore common parameters in a COMETH COMETH FIELD RD USER S MA
20. ddress See the www ietf org documentation The bits set to one in the IP netmask define the bits of the associated IP address to be taken as the network part Network class Network bits Host bits Netmask A 8 24 255 0 0 0 B 16 16 255 255 0 0 C 24 8 255 255 255 0 Each COMETH has one user assigned IP address Its factory assigned default value is the Class C address 192 168 1 253 4 Gateways Each network device communicating through gateways MUST know the IP address of the gateway nearest to it It will use this gateway to forward data to farther LANs If a device does not know its gateway it may receive data but may not return an answer For example this can forbid answering a 10 1 2 30 Device 1 COMETH Must know about address 10 1 2 1 to send to Device 2 PING even if the PING request makes its way to the device CONNECTING THROUGH GATEWAYS EXAMPLE Gatewayttl 192 168 1 254 Gateway 2 Fd 192 168 1 12 Device 2 computer Must know about address 192 168 1 254 to send to Device 1 VIII 5 TCP port number Every TCP connection is defined by a source and destination IP address and port number For example a TELNET application commonly uses destination port number 23 To support its two application processes the COMETH uses TCP port 23 to allow remote administration and one more TCP or UDP port depending on the firmware for data exchange with the asynchrono
21. default port for TELNET In this way data transfer can proceed in parallel This is useful for probing the configuration without changing it When TELNETing to one out of many COMETH you can wonder where is the device you are accessing There is a field called location that you can set up and display to reflect the physical location of the device VIL2 Security By default using the administration system through TELNET allows you to display the COMETH configuration without logging in but you cannot change it Changing the configuration is protected with a username login and password which you can change at will The default setting is e login root e password root Optionally you can require the administrator to log in before he is allowed even to display the configuration You can forbid administration from the network after which the COMETH configuration can only be achieved by administering through serial port VIL3 Handling disconnections in TCP Some COMETH firmwares use the TCP protocol to communicate with their client application While this protocol provides reliable data transfers it requires the client to establish a virtual link with the COMETH and to relinquish this link in order to allow another client to call in the COMETH If the client software crashes it has no time to relinquish the link and the COMETH keeps thinking that the link is established with a client that has disappeared Now if the clie
22. e 9 pins male connector is a standard EIA TIA574 Data Terminal Equipment DTE connector To connect COMETH to a DTE peripheral use a crossover null modem cable To connect COMETH to a DCE peripheral for example a modem use a straight cable IV 3 RS422 RS485 cabling recommendations To avoid any cable inversion caused by using the non standard and convention one manufacturer will describe as what another will describe as make up your cable as follows Software configuration Check section VII Advanced configuration to select your electrical interface In RS422 mode Identify A A B amp B signals on the equipment side Some equipments document these signals with other names as follows A Rx B Tx B Rx The points A B A and are as defined in the EIA 422 and V11 recommendations such that Va lt Vg and V4 lt when idle state also called MARK or OFF Transmission Reception of stop bits Connect signal A of the COMETH to signal A of the equipment Connect signal B of the COMETH to signal B of the equipment Connect signal A of the COMETH to signal A of the equipment Connect signal B of the COMETH to signal B of the equipment COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 14 In RS485 mode Identify AA amp BB signals equipment side The points AA and BB are as defined in the EIA 485 and VII recommendations such tha
23. e cabling of the COMETH see section III Connectors Plug the Ethernet jack from your HUB into the COMETH The COMETH does not normally require a crossing cable If the Ethernet cable is good and correctly inserted on both ends the LINK light should go on on the COMETH and also on the HUB if it has a LINK led COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 26 V 9 Other configuration Many other configuration options are available You can enforce some setup or behavior of the asynchronous serial interface change more network parameters like the data TCP port set up security options and so on Please refer to the Advanced configuration section Check also the parameters settings section of the relevant firmware document i e SERVERCOM MODBUS MULTIPOINT To use the SERVERCOM mode see documentation SERVERCOM UserGuide DTUS043 pdf To use the MODBUS TCP mode see documentation MODBUS TCP UserGuide DTUS041 pdf To use the MULTIPOINT mode see documentation MULTIPOINT UserGuide DTUS056 pdf To use the TCPCLIENT mode see documentation TCPCLIENT UserGuide DTUS045 pdf You are now ready to use the COMETH COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 27 VI TROUBLESHOOTING Please check the following thoroughly before calling for support If you must call we will need complete information about your network topology IP addresses of intervenin
24. es gt TCP server To use COMETH in raw mode with a network socket application gt Telnet RFC2217 To use COMETH with a com application needs a COM port redirector like VIP COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 Il PRODUCT SPECIFICATIONS IL1 Characteristics IL2 Power RS232 or RS422 RS485 to Ethernet 10 100 BASE T excepted for COMETH FIELD RD rev A 10 BASE T only adapter with high frequency filter and surge protection Din Rail metal housing including DB9 male connector on the RS232 side DB9 female on the RS422 RS485 side and RJ45 on the Ethernet side RS232 RS422 RS485 Master or Slave selection by software built in automatic turn around in RS422 and RS485 mode External power supply 9 to 36 VDC Power supply protection by current limitation RS422 RS485 protection against temporary line voltage surges by peaks 300 W 8 20us breakdown voltage 6 5V in common and differential mode high surge capability 40 8 20 5 ESD protection up to 15kV RS232 15 kV ESD protection Ethernet isolation 1 5 KV External power 9 to 36 VDC DC POWER via 3 pins screw terminal connector For COMETH FIELD RD rev A Maximum current 125 mA at 9 VDC Power consumption 1 1W max For COMETH FIELD RD rev B Maximum current 220 mA at 9 VDC Power consumption 2W max IL3 LAN interface RJ45 Ethernet connector Ethernet 10 100 BASE T excepted for COMETH FIELD RD rev A 10 BASE T only Ethernet IL IEEE 802
25. g devices description of your device s serial connector model of the computer and operating system The checks should be done in the order given below VI 1 Checking the hardware Five LEDs allow hardware diagnostic Power e this led lights up when the COMETH is correctly powered If the POWER LED stays off it means that your power supply is bad or incorrectly connected Diag e In Administration mode this LED flashes twice per second unevenly bip bip bip bip e In Exploitation mode this LED flashes when an error is detected in characters received on the asynchronous interface e When resetting this LED stays lighten until the COMETH is ready to use usually in less than one second or in about 10 seconds if you issued a set prog enable command before e Shortly after reset if DHCP is enabled the LED flashes once per second until network parameters are acquired e The TCPCLIENT firmware flashes this LED five times per second whenever it is not connected to a server If the DIAG LED stays lighten at power up it means that the COMETH is out of order Try to power it down then up again after a few seconds If the DIAG LED flashes to indicate Administration mode push firmly the Adm switch in the opposite position OFF Serial Tx Rx e this LED flashes when sending or receiving data on the asynchronous serial interface If the Serial Tx Rx LED stays off while your device is sending data it means t
26. hat most suited your needs Now it is time to activate this firmware and set its own parameters Say that you determined that you need to activate the MULTIPOINT firmware Connect to the administration either through the network or the serial interface identify yourself then display the list of available firmwares root show prog list file status name version update 0 valid DOWNLOAD STD 2 6 0 1 2 2 1 valid DOWNLOAD STD 2 6 0 1 2 2 72 valid SERVERCOM 3 4 0 0 2 6 3 valid MULTIPOINT 1 0 0 0 2 6 4 valid MODBUS TCP 2 6 0 0 2 6 5 valid TCPCLIENT 252043 2 6 OK Now check the currently active firmware root show prog enable enable software 2 loading software 2 In the list you can see the number of the file holding the desired firmware the MULTIPOINT firmware is in file 3 Until now the active firmware was 2 which is SERVERCOM You must now activate the desired firmware root set prog enable 3 root save root reset Other information about firmware download installation and selection is given in download firmware user guide DTUS040 pdf V 8 Install the COMETH in its final location Now you can unplug the COMETH from the administration PC If administration by serial mode has been selected push the mode switch on the other side thus allowing data to go from Ethernet to the asynchronous interface Check the cabling of your device against th
27. hat the RS cable is bad improperly connected or some kind of flow control forbids transmission If the Serial TX Rx LED stays off while you are sending data to your device it means that some kind of flow control forbids transmission or the COMETH does not receive Ethernet data frames If the serial Tx Rx LED stays on while you are not sending data to your device and your device is not sending data it means that the RS cable is bad improperly connected A amp B or A amp B are inverted line polarization is required in RS422 multidrop and RS485 mode COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 28 For COMETH FIELD RD rev Link e this led lights up when the COMETH is correctly attached to the LAN If the LINK LED stays off it means that your cable is bad incorrectly inserted in the HUB or in the COMETH or the HUB is crossing the cable or the cable is crossed Lan Tx Rx e this LED flashes when sending or receiving data on the LAN If the Lan Tx Rx LED stays off while your device is sending data it means that your cable is bad the COMETH IP address is not correct Serial IP is not properly installed or the COMETH is not connected to the same LAN than your device If the Lan Tx Rx LED stays off while you are sending data to your device it means that your cable is bad the COMETH IP address is not correct Serial IP is not properly installed or the COMETH does not receive data on the as
28. he Adm position The red DIAG light should blink twice per second If it is not the case try pushing the switch in the opposite direction V 4 2 Connect to a serial port This step is required to set up the COMETH IP address Below we describe how to do this with a PC with Windows Other devices ANSI console or operating systems Linux with minicom or can be used but this is beyond the scope of this manual The COMETH FIELD has one male DB9 RS232 connector with DTE cabling You can use the provided null modem cable and plug it directly into a standard DB9 male connector PC COM port for example V 4 3 Run Hyperterminal When asked to choose a modem or port select a direct connection to COMx COMXx being the COM port on which you plugged the COMETH Select the following port parameters 2400 bauds bits second 8 bits parity none 1 stop bit no flow control Hyperterminal now displays a blank window Hit the ENTER key to display the admin prompt V 4 4 Proceed to paragraph V 6 TCP IP configuration Administration by LAN The default IP address of the COMETH is 192 168 1 253 You can install the COMETH for the first time by LAN only if your network can match this requirement Only one new COMETH can be plugged on the LAN at a given time until you have assigned a different IP address on each COMETH Otherwise conflicts will result V 5 1 Computer configuration No switch is needed Conf
29. he COMETH and the network application using it are not on the same Ethernet LAN 1 if they separated by one or more gateways also caller routers you must set the nearest gateway address into the COMETH and you must set the maximum number of gateways to cross if the factory default of 10 is not enough The following line is required only if you will cross more than ten gateways root set net metric n n is number of gateways to cross If you use a DHCP server that provides gateway information to the COMETH you won t need the following command Otherwise the following command is required if you need to cross one or more gateways root set net gateway XXX YYY ZZZ TTT XXX YYY ZZZ TTT is the address of the gateway closest to the COMETH here closest means that it is on the same Ethernet LAN Do not forget to save the configuration changes root save root reset COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 2d V 6 3 Dynamic IP address and gateway configuration with DHCP Note DHCP is not available in early revisions of the firmwares On a COMETH delivered in 2002 check the existence of the show dhcp command to know if you need a firmware upgrade Diag LED blink in DHCP mode When the diagnostic LED red LED is blinking once per second the COMETH is requesting a network configuration to DHCP server Functionality of the DHCP client e suppor
30. iguration memory which is used after reboot and remains when the COMETH is powered off close the administration session and reboot the COMETH to ignore parameters changed but not saved or to reload saved parameters The following parameters do not need a reset to take effect location 192217 showperm netconfigperm serial termtype serial interface close administration session TELNET only COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 ds General parameters changes set login username change administrator name 8 bytes max Upper and lower cases set password password change administrator password 8 bytes max Upper and lower cases set location location change location description 30 bytes max Upper and lower cases set showperm allow allow or deny the right to display configuration information without set showperm deny entering the administrator password set netconfigperm allow allow or deny the right to use the administration system from the set netconfigperm deny network firmwares parameters changes See download firmware user guide DTUS040 pdf set prog enable Seg Enable firmware located in segment Seg Network parameters changes set net ethernet XX XX XX XX XX XX change COMETH Ethernet address 6 hex digits separated by columns DO NOT CHANGE if you don t know exactly the consequences set net dhcp on These two commands turn on or off the DHCP client set net dhc
31. igure a computer with 192 168 1 x IP address where x 253 and x 255 and x z 0 and x z any address already assigned Check that the computer is connected to the same LAN than the COMETH V 5 2 Run Telnet C gt telnet 192 168 1 253 Telnet displays a banner and a prompt from the COMETH Type login root Password root V 5 3 Proceed to paragraph V 6 configuration COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 22 V 6 TCP IP configuration The IP address of the COMETH must be unique on the network You can statically specify the address you want by means of the administration commands or you can use an existing DHCP server on the network to give you an available address If you define both DHCP and static IP address the DHCP configuration will override the static IP V 6 1 Static IP address configuration In the following lines replace XXX YYY ZZZ TTT by the IP address and netmask you chose for the COMETH root set net ip 222 root set net mask XXX YYY ZZz TIT Now you should save the configuration changes root save root reset Example this sample session will reinstall factory values root set net dhcp off OK root set net ip 192 168 1 253 OK root set net mask 255 255 255 0 OK root save OK root gt reset COMETH SERVERCOM version 2 12 0 0 Administration mode ready V 6 2 Static router gateway configuration If t
32. imeout in seconds forced reconnection feature use on off Display information about firmware located in segment Seg same in computer readable format Display information about all 6 firmwares Display the currently running firmware and the one that will run after the next reset COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 36 VILS Factory settings common to all firmwares prog enable login password location showperm netconfigperm net ethernet net dhcp net dhcp hname net dhcp clientid net ip net mask net gateway net configport net txsize net rxsize net metric net keepalive net segtmo net reconnect SERVERCOM firmware located in segment 2 Functionnalities Raw TCP server TELNET amp TELNET 2217 root root unknown location allowed allowed device serial number written on the label off empty not sent empty MAC address sent as string 192 168 1 253 255 255 255 0 0 0 0 0 no gateway router 23 576 576 10 off off off COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 Se VIII ADDRESSING IN NETWORK PROTOCOLS VIII 1 TCP IP network layers TCP IP is the name of the protocols used by Internet and many Intranets In a device participating in a TCP IP network there are four software layers the application layer the transport layer TCP or UDP the network layer IP the LAN layer Ethernet WIFI point to point modems
33. lways sent to the server The Host Name is sent only if set manually Example 1 this sample session will use only the MAC address root set net dhcp on OK root show net dhcp clientid undefined client id root show net dhcp hname undefined host name Now you should save the configuration changes root save root reset COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 24 Example 2 use a network administrator provided name cometh b12a27 for the COMETH device root set net dhcp on OK root set net dhcp clientid cometh b12a27 OK root show net dhcp DHCP on root show net dhcp clientid cometh b12a27 root gt show net dhcp hname undefined host name Now you should save the configuration changes root save root gt reset Example 3 use the MAC address for client id and also a network administrator provided host name cometh12 mydomain com root set net dhcp on oot set net dhcp clientid oot set net dhcp hname comethl2 mydomain com oot show net dhcp HCP on oot show net dhcp clientid ndefined client id root show net dhcp hname cometh12 mydomain com CR OR OR OC HB AN Now you should save the configuration changes root gt save root gt reset COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 25 V 7 Activate the relevant firmware In the first installation step you chose the COMETH firmware t
34. n 2 RXD Input to Cometh 76m m L TXD Unused 3 TXD Output from Cometh 4 B RXD 4 DTR Output from Cometh A 5 5 Digital Ground Digital Ground 5 GND Digital Ground N 8 2 6 Connect together 6 DSR Input to Cometh 28 7 for line polarization 7 RTS Output from Cometh ro 8 A TXD Unused 8 CTS Input to Cometh as 9 A RXD AA TXD RXD 9 RI Input to Cometh q N RS422 485 DB9 Female RS232 DB9 Male Adm 6 9 79 6 yis AC C gt FUE 7 2 o O o o o COMETH C up a i F EM NONSE x 28mm 73mm 93mm COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 10 For COMETH FIELD RD rev B Power Diag Serial Tx Rx 10 Base T 100 Base COMETH FIELD RD 88mm gt Administration mode OFF ON 29 mm ACKSYS DIN RAIL OMEGA RS422 RS485 Term inating Resistor Single port device server ACKSYS Power Supply Connector acksys fr 9 36 VDC 1 1 W max RS422 485 DB9 Female Connect together for line polarization TxB Out in TxRxB RS232 089 Male DTE 76mm 2 g 8 g DCD In TXD Out DTR Out Connect together for line polarization TxA Out RxA TxRxA In Out RTS Out Pin L1 2 2 3 3 4 4 5 5 L6 6 8 8 9 9
35. nt application is restarted and tries to connect the COMETH will reject the call because it thinks it s already connected Two features of the COMETH allow the management of such cases Note These features were not available in early revisions of the firmwares On a COMETH delivered in 2002 check the existence of the show net reconnect command to know if you need a firmware upgrade Keep alive and segment timeout These features allow a COMETH device to detect a possible loss of connection with the remote client thus COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 S VE relinquishing the obsolete link and allowing a new connection request to be accepted When no data exchange takes place between the client and the COMETH the keep alive feature will wait for a defined amount of time say the activation delay Then it will probe the client several times waiting a bit say the interval delay between each probe for an answer from the client If none of the probes is answered the COMETH closes the TCP connection In the process it may also drop control signals on the asynchronous serial port depending on the serial dtr and rts settings The set net keepalive and show net keepalive series of commands allow you to set up this mechanism When data sent from the COMETH is not acknowledged by the remote client the COMETH will retransmit By default it will retry indefinitely The optional data
36. ocal ISP The IP address is usually represented in the decimal dotted notation which consists of the decimal value of each of the four bytes separated by dots The IP address is divided into two parts network and host To support different needs three network classes have been defined In the following x stands for the host part of the IP address A host part with all bits set to 1 is the broadcast address meaning for for every device A host part with all bits fixed to 0 addresses the network as a whole for example in routing entries Class A network IP address 1 x x x to 127 x x x COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 E m The first byte defines the network and the last three bytes define the host Only 127 different class A networks exist and each consist of up to 16 777 216 devices Class B network IP address 128 0 x x to 191 255 x x The first two bytes define the network and the last two bytes define the host Class B networks are typically used for large company networks and each can consist of up to 65 534 devices Class C network IP address 192 0 0 x to 223 255 255 x The first three bytes define the network and the last byte defines the host Class C networks are the most common and are often used in smaller company and each network can consist of up to 254 devices More complex classes can be defined by manipulating the IP netmask associated with the IP a
37. ound in networking required to install the COMETH It is expected that the reader of this manual has some background knowledge of TCP IP and how to setup and use TCP IP on a Windows based PC As well anyone installing a COMETH should know how his her network is organized COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 6 1 2 The software The COMETH FLASH EPROM can contain up to six different firmwares including client and server software tunnelling modbus support etc New firmwares can be developed by ACKSYS to meet specific needs To list all firmwares flashed in the COMETH FLASH EPROM a dedicated administration command show prog list can be run see chapter VII 4 See download firmware user guide DTUSO040 pdf documentation to understand in details the software architecture All the embedded firmwares have an administration system relying on a Command Line Interpreter The administration system is accessible through the serial port as well as through the network It s also accessible with windows browser Administration commands common to all firmwares are documented in chapter VII 4 Commands list The commands specific to other firmwares SERVERCOM MODBUS TCP MULTIPOINT TCPCLIENT are documented in a dedicated manual See the ACKSYS CDROM or the ACKSYS web site at http www acksys fr Upon delivery the default firmware enabled is SERVERCOM which enables two main functionaliti
38. p off When DHCP is on the manually specified IP address is not used set net dhcp clientid ident replace the standard client ID MAC address as a string by the custom string ident 15 bytes max upper and lower cases allowed set net dhcp clientid delete the custom client ID and use the standard client ID set net dhcp hname hostname provide the DHCP server with the supplementary Host Name option with value hostname 19 bytes max no spaces allowed upper and lower cases allowed set net ip aaa bbb ccc ddd change COMETH IP address in dotted decimal notation set net mask aaa bbb ccc ddd change the subnet mask set net gateway aaa bbb ccc ddd change the default gateway IP address set net metric mmm number of gateway hops mmm is 1 to 255 set net keepalive n 1 12 n defines the number of probes to send before closing the connection 7 defines the time in seconds before sending the first probe since the connection is inactive the activation delay mentioned earlier t2 defines the time in seconds between each probes the interval delay mentioned earlier n ranges from 1 to 255 and 12 range from 1 to 65535 set net keepalive 0 0 0 disables use of the keep alive feature set net segtmo nsec nsec is the retransmission timeout in seconds Set to 0 to retransmit indefinitely set net reconnect on These two commands turn on or off the forced set net reconnect off reconnection feature COMETH FIELD RD USER S MANUAL
39. rk you must use the COMETH MODBUS firmware on each slave side If you want to access a remote serial device in the same manner as a local port including control signals e usually COMETH SERVERCOM on the device side and a COM port redirector on the computer will do that If you want to exchange serial data no control signals between two or more devices through a LAN e use COMETH MULTIPOINT on all the serial attachements involved e if you have only two devices and not loosing data is more important than speed and network bandwidth you must use COMETH SERVERCOM on one side COMETH TCPCLIENT on the other side If you want to write a SOCKET application to access remote devices e use COMETH SERVERCOM in raw mode TCP to handle unrelated devices e use COMETH MULTIPOINT UDP to broadcast to several devices at the same time If you want a remote serial device to call into your application COMETH TCPCLIENT is what you need COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 20 V 2 Collect network characteristics You will need at hand the following information about your LAN Will the COMETH use DHCP C If DHCP is used e Does the network administrator or the DHCP server require a specially crafted client identifier Client ID DHCP option 61 e Does the network administrator or the DHCP server require a Client Host Name hostname identifier DHCP option 12
40. t Vaa lt when idle state also called MARK or OFF Transmission Reception of stop bits Connect signal AA of the COMETH to signal AA of the equipment Connect signal BB of the COMETH to signal BB of the equipment Line polarization Line polarization is needed for stability in RS485 mode and RS422 mode in multidrop Master Slave set up also called RS485 4 wires Line polarization is integrated to the COMETH and can be connected by cabling 2 straps on the DB9 female connector 1 2 amp 6 7 A single polarization is necessary on the bus Terminating resistor The terminating resistor for RS422 RS485 line reduces reflections created by long lines at high speeds It is not required in noise free environment and if the distance and the rate are within 1000 meters at 9600 bps or 100 meters at 115200 bps Terminating resistor is integrated to the COMETH and can be connected by a jumper IV 4 Cable length for RS422 and RS485 In 10K 3 3 D I S N 1 2K c 100 10 1K 10K 100K 1M 10M bps BAUDRATE COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 IV 5 RS422 Cabling example RS422A FULL DUPLEX POINT TO PO
41. ts all kinds of IP configuration Manual Automatic Dynamic see RFC 1541 e supports option 12 of RFC 2132 Host name e supports option 61 of RFC 2132 client ID The default client ID used is the MAC address of the COMETH or a ClientID configured by the set net dhcp clientid command The MAC address is used if ClientID is empty e supports DHCP agent or BOOTP agent specified in RFC 2134 e supports the infinite lease Limitation of DHCP client in COMETH the lease of DHCP server must be less than 24 9 days e RFC 2136 DNS update with DHCP information is not supported on the COMETH side So you need a DHCP server which supports RFC 2136 for example the Windows 2000 DHCP server the COMETH has no IP address as long as the diag LED blinks e only the IP address subnet mask gateway address and lease time are used in the configuration information returned by the DHCP server In order to give an IP address to a COMETH the DHCP server must be able to uniquely identify the requesting device i e the COMETH Hence the COMETH must provide a unique identification to the DHCP server Usually the MAC address is used for this purpose Some administrators or DHCP servers require other kinds of identification Hence you can either set up manually the Client ID DHCP option 61 else the MAC address will be used as a string identifier If you need you can also set up a Host Name DHCP option 12 The Client ID is a
42. us port COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 39 IX REFERENCES COM port redirection http www ietf org rfc rfc2217 txt DHCP http www ietf org rfc rfc1541 txt http www ietf org rfc rfc2132 txt http www ietf org rfc rfc2134 txt http www ietf org rfc rfc2136 txt Keep Alives http www ietf org rfc rfc1122 txt ACKSYS documentations For the latest versions please check the download section of http www acksys fr CD ROM documentations download firmware user guide DTUS040 pdf SERVERCOM UserGuide DTUS043 pdf MODBUS TCP UserGuide DTUS041 pdf MULTIPOINT UserGuide DTUS056 pdf TCPCLIENT UserGuide DTUS045 pdf COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 ACKSYS COMMUNICATIONS amp SYSTEMS ZA Val Joyeux 10 rue des Entrepreneurs 78450 VILLEPREUX FRANCE Telephone 33 0 1 30 56 46 46 Fax 33 0 1 30 56 12 95 Web www acksys fr Hotline support acksys fr Sales sales acksys fr
43. ynchronous serial interface For COMETH FIELD RD rev B 10 Base T e This led lights up when the COMETH is correctly attached to the LAN and if you use a 10 Base T Ethernet link If the LINK LED stays off it means that your cable is bad incorrectly inserted in the HUB or in the COMETH This LED flashes when sending or receiving data of the LAN 100 Base Tx e This led lights up when the COMETH is correctly attached to the LAN and if you use a 100 Base Tx Ethernet link If the LINK LED stays off it means that your cable is bad incorrectly inserted in the HUB or in the COMETH This LED flashes when sending or receiving data of the LAN COMETH FIELD RD USER S MANUAL Release A 7 February 22 2010 29 2 Checking the network topology In the following examples the COMETH IP address is 192 168 1 253 the computer used for the tests has IP address 192 168 1 244 e First you must ensure that the COMETH has a unique IP address on the local network Disconnect the COMETH from the LAN then try to PING the COMETH address from a computer connected to the local network This should result in an error or timeout C gt arp d 192 168 1 253 C gt ping 192 168 1 253 Pinging 192 168 1 244 with 32 bytes of data Request timeout Request timeout Request timeout Request timeout The Request timeout error messages are normal and expected in this case If this is not the case another host has the same IP
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