Chapter 6:dl205_ch2.qxd.qxd
Contents
1. A MAINTENANCE AND TROUBLESHOOTING In This Chapter Isolating a Communication Problem eee eee eee eee 6 2 Diagnostic Tools and Techniques eem meam SER HE ee ITE aES 6 2 Troubleshooting Chait 66055544406 dodo aO E ER EGRE Seb hee dracone a d 6 2 ERM Module Diagnostic LEDs lceee e eens sete rm er e ers 6 4 PRN BEDS arrere rE Free e nna Hanke PEINE DS MM X CT qp 6 4 Link Good INGICAION asd ams a9 901399 4 990 ERRE E E E eee E ee 6 4 W M c 6 4 EMOF INGICAHOl MEC A ES 6 4 Slave Module Diagnostic LEDs llle 6 4 BEBE LEDS 3 eb ap ee YT CREER PEE EN nq ACE hae eee eee Tie eee EE 6 4 Error MAICA OT seres ern A a eee pe ee eee eee eee me 6 4 Using ERM Workbench for Troubleshooting eee 6 5 Read IrDHY ERIVI radan annro JURE RR BREST S SEU Ow RR ME a eee a 6 5 Reserved PLC Memory TOF ERM hohem Reno onn Cn hn eee 6 6 Detailed ERM StatistiCS EEERETTOCOTL RETO E ener a eee bee rGess 6 6 Select Slaves WINdGOW x exusta dad eia rida Hoe RE RU Se ee eee ne ed 6 7 Using NetEdit for Troubleshooting cee ee eee eee ee eee eee 6 8 asd on ee cereeaaeawan a ee eee eee ee ee eee eee eee nes 6 8 Moaule Information S ossia EPIS 3 oeeeoecegeansedoe5en UN TED PPS E 6 8 Changes PEROIDEOL essere 55cecadye o oho t riti E eee ROR aC AQ ROI a 6 9 Replacing the ERM Slave Module 3 c nce 9 45554 Einen ir e dS SUE tose RUN ee A 6 92. Diagnosing Network Cable Problems eee 6 10 Chapter 6 Maintenance and Troubleshooting O Isolating a Communication Problem If you are experiencing a problem communicating with an ERM module or one of its slaves the problem can usually be isolated to one of four components of the communication link ethe Ethernet module itself hardware or firmware ethe setup of the ethernet module ethe cabling or connections eother external influences such as electrical noise heavy communication traffic on the network or exceeding the power budget Diagnostic Tools and Techniques Several available tools and techniques can help you isolate a communication 6 problem he LEDs on the face of the module indicate the status of the link the module and the network communications Replacing the module may determine whether the problem is in the module NetEdit and the ERM Workbench display a list of the active modules on the network and their protocol and configuration settings Cable testing devices can pinpoint short or open circuits or diagnose attenuation problems and other cabling problems Troubleshooting Chart The following chart summarizes the different types of communication failures you could experience In each case the CPU PWR LED must be on and you must be attempting to communicate with the module in question NOTE The ERM Workbench Utility allows the user to flash the error LED for 3 seconds
3. Address or configure the 405 EBCs for analog I O modules if necessary See the following section for details on NetEdit Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M 6 7 Chapter 6 Maintenance and Troubleshooting O Using NetEdit for Troubleshooting NetEdit is a software utility within ERM Workbench which came with this manual To review the procedures for accessing and using NetEdit see Chapter 5 It allows you to e See active modules on the network Examine and change the modules configuration settings See the firmware revision number Review statistical information about communication errors by type If you can see the ERM and slave modules on the list in the Module box described below you are linking to the module from your PC If you are linking to the module but failing to communicate with the module you can conclude that e The module is working 6 e The cabling is satisfactory from the PC to the hub and from the hub to the ERM module e The hub is working e The problem is in one of the other components of the communication link Select a Module The Module box shows the Ethernet Ethernet Address F B C Module Type IP Address Addresses of all modules which are eS eee cci 00 E0 62 2163 B7 H2 ERM 100 172 30 58 78 currently linked to the NetEdit utility If your ERM or slave module is not on this list try the following Change Protocol selection and click on Q
4. error Example errors e Cannot communicate with an ECOM or GS EDRV 100 e Hardware installed in a base does not match the hardware configuration e An analog module error bit is ON e Fatal error If a fatal error has occurred ERM Workbench and NetEdit are unlikely to successfully communicate with the ERM Try cycling power to the ERM If the error will not clear replace the module Slave Module Diagnostic LEDs EBC LEDs Hx EBCs LED Diagnostic information is located in the Troubleshooting Guidelines chapter in the Ethernet Base Controller Manual H24 EBC M and for the TI1H EBC in T1H EBC M manual Error Indicator A specific ERM network condition that can cause the EBCs ERROR LED indicator to illuminate is if the watchdog timer times out This can result from the slave being disconnected from the ERM network 6 4 Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M Chapter 6 Maintenance and Troubleshooting _ L LLIAg7l Using ERM Workbench for Troubleshooting ERM Workbench can be used for troubleshooting an ERM Ethernet remote I O system It allows you to View slave status and Detailed ERM Statistics e See active modules on the network e Examine or change the slave module s configuration settings Read from ERM To view the current configuration in the ERM module launch ERM Workbench and click on Read from ERM under the File menu or tool bar The following ERM main conf
5. e end of the cable to the other Attenuation This refers to the amount of signal loss over the cable segment at the signal frequency of interest The 10 100BaseT specification allows for a maximum signal loss of 11 5 decibels dB for the entire link at the signal frequency used by 10Mbps Ethernet The 10BaseFL specification calls for the optical loss in link segment to be no greater than 12 5 dB Crosstalk Crosstalk occurs when a signal in one pair of wires is electromagnetically coupled to an adjacent pair This is critical for 10 100BaseT networks which are susceptible to noise interference 10BaseFL networks are virtually immune to noise interference NOTE Any significant difference between the cable characteristics of the transmitter and receiver can cause communication errors Ethernet devices continually monitor the receive data path for activity as a means of verifying their link is working correctly When the network is idle each network device including the ERM module sends a periodic ink test signal to verify that the network is working If the link test signal or other network activity is not received periodically the LINKGD LED on the ERM module is turned off 5 1 0 Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M
6. his Ethemet Remote SECOND configure each slave Default can Master Up to 16 slaves can be added to an ERM s slave list work but adjustments may be necessary r Slave Local H2 EBC PC Network Slaves on IP UDPAP ERM s Slave List 00 EO 62 00 13 11 Module Model Protoco ETE Ethernet Address IP Address ID Number Slave Status HOES OOE062001911 255255255255 25 H2 EBC 1 DS Ee ree Ethernet Address 2 Address Mode 99 062001911 A ERM Timeout 25 5 to Slave S Retries 1 9 Failures Before gt 9 Standby Mode 10 Watchdog 250 11 Timeout Pet Frequency 125 be 140 Count 16 pes none points Discrete L bc DENT mm Outputs none points ers none words r Show in List Remove Remove All renee none words e C f i i Slaves Only ERMs Only All Devices eE Query IP Add to m Network NetEdit Slave List gt Cancel If the ERM or slave module is not on the list try clicking on either the IPX or UDP IP radio button Query is automatically done when the protocol in the center column is changed Confirm that your PC has IPX and TCP IP protocol loaded Make sure the desired network slaves are in the ERM s Slave List The right column displays the Slave Configuration of the the specific slave that is selected in the ERM s Slave List NetEdit can be accessed from this window NetEdit is a software utility that can be used to set the Module ID set an IP
7. iguration window will be displayed File View Help Os em 8 8 amp i Ethernet Remote Master H2ERM EthemetAddress 00E0622013E2 IP 255 255 255 255 Module ID 0 aaa sca s pu mie OMS EE 1 Configure ERM CPU PLE cpu 20 Slave Status SS mr Interface i nam is 0 ESS o X3 MIB 2 Select Slaves Last ERM no error PLC Mode Program s fo fm fe Ma mh ms fie Error 3 Write to ERM Click on slave above Slave 2 no error to see its Last Error Time of An last read 10 40 31 z Clear Last Error Slave 2 Slave 2 s Error List Detailed ERM Status 1 0 Module 1 0 Points PLC Start PLCEnd V Map Notes lt reserved gt Slave Status Bits V40414 ERM Status Word V40415 Disable Slave Comm V40514 Slave 1 H2 EBC Ethernet Address 00 EO 62 00 01 D4 on IPX Slave 1 Slot 0 16 Discrete Input V40415 Slave 1 Slot 1 8 Discrete Output V40515 Slave 1 Slot 2 4 Word Input 16 bit Binary 2 Word Output 16 bit Binary Slave 2 T1H EBC hotswap auto Ethernet Address 00 EO 62 40 06 34 on IP Slave 2 Slot 1 8 Discrete Input V40417 Slave 2 Slot 2 8 Double Word Output 32 bit Binary 8 Discrete Output 40515 Slave 2 Slot 3 8 Double Word Input V2004 32 bit Binary 4 Double Word Output V2122 32 bit Binary 8 Discrete Output 340 V40516 ReadERM Status AUTO MODIFIED NUM The ERM main configuration window lists the ERM s Ethernet Address IP Address Module ID just bel
8. memory addresses DLX300 X300 and DLY300 Y300 are used in this example Do more DirectLOGIC Slave Status Bits Slave Status Bits MSB LSB The Slave Status Bits can oH V40414 ree Slave 16 ERE Stave 1 b DLX DLX e monitored to detect ifa slave 16 CTT siave 1 3 3 slave is in error X X 1 0 3 3 y 0 1 0 7 0 The ERM Status Word ERM Status Word ERM Status Word contains the ERM error ooon code and Status Bits see SE neue iu DLX DLX DLX the following description X XX X 3 3 and Error Codes in 3 3 2 2 07 O Appendix B Bit 8 07 O indicates that the ERM is Ls Status Bits Error Code disabling a slave Status Bits Error Code The Disable Slave Bits can Disable Slave Bits Disable Slave Bits be used to disable a slave MSB EU from communicating with pne ested x Pone ne UI LS ER vensodude BON Gai y y Slave 1 disable that specific slave x 7 0 RESET re enable the 7 0 specific slave Detailed ERM Statistics Detailed ERM Statistics provides I O Cycle Times Total Retries to All Slaves and CPU Interface information This information may be helpful when trying to diagnose a remote I O network problem The maximum I O Cycle Time is the time for the ERM to 1 read the remote slave inputs and write the data to the CPU and 2 for the ERM to read the output data from the CPU and write the data to the remote slaves x Minimum 1 0 CPU Interface fas Cycle Time 65535 ms js mus 0 ms Clear Statistic
9. n the Ethernet Stats box is Missed Frames frames lost due to unavailability of buffer space TX Collisions detected when RXD and RXD become active during a data transmission Two devices are trying to communicate at the same time Lost Packets packets that overflow the queue Bad Packets packets that fit the Ethernet standard but are not in the right format for the EBC module Unknown Type a foreign command was received and could not be interpreted This will probably happen only during software driver development e TX Errors the Ethernet standard number of retries were attempted for a transmission Change Protocol If you are experiencing a problem communicating from your PC to a module that does not appear on the list of active modules try Fie Network View utis Hep changing the protocol and clicking on Scan Network You may be px GRIS d able to link to your module with the other protocol Replacing the ERM Slave Module If you set up your original ERM or slave module using NetEdit you will need to duplicate the settings in the new module using the same procedure disconnecting the system power To minimize the risk of equipment damage electrical shock or personal injury always disconnect the system power before installing or removing any system 1 WARNING Your system can be damaged if you install or remove system components before component Ethernet Remote Master User Manual 2
10. nd Edition Rev A H24 ERM M 6 9 Chapter 6 Maintenance and Troubleshooting O Diagnosing Network Cable Problems If you are experiencing communication problems swapping cables is one of the simplest diagnostic procedures you can perform If the network operates correctly with a different cable you have isolated and cured the problem If possible use a short run of cable to test the network because problems with longer cable runs can be more difficult to diagnose and are more often intermittent If you are unable to swap cables verify the proper operation of all other network components You probably have a cable problem if you have verified that your e ERM module is working correctly ERM module configuration is correct RLL program is correct hubs are working correctly e Windows configuration is correct network adapter card is the correct type and it is working correctly It is a good maintenance practice to test network cables periodically and maintain a permanent record of cable characteristics A number of cable test instruments are available to test 10 100BaseT and 10BaseFL networks These instruments will check the electrical or optical characteristics of your cabling including Continuity This is a check to make sure the communication pairs are wired correctly and that the wires are continuous from end to end In the case of fiber optic network this is a test to be sure light is transmitted from on
11. operation Troubleshoot only if you are failing to exchange data LINKGD MN LINKGD EEE 1 Try another cable between PC and hub or other ACT OH ACT NEM module and hub ERROR L ERROR 2 Try another port on the hub or another hub 3 Confirm that ERM module is in a usable slot in the PLC base see pages 3 2 and 3 3 and that the CPU LINKGD ON LINKGD ON Interface and its firmware support the ERM module ACT Flashing ACT ON 4 Look for errors in the setup of the ERM module or in the communication program Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M 6 3 Chapter 6 Maintenance and Troubleshooting O ERM Module Diagnostic LEDs Blinks while module is booting N A On solid when module is ready On when module has established communications with the connected Ethernet device typically a switch Indicates network activity May appear solid ON during heavy traffic Indicates an internal fatal l error of the ERM module Indicates an error from a network device or a fatal See Note 1 internal error of the ERM module See Note 2 N A On solid when linked at 100Mbps Note 1 The ERROR LED on H2 ERM or H4 ERM modules indicates a fatal internal error Cycle power to clear the error If the error will not clear replace the module Note 2 The ERROR LED on H2 ERM100 or H4 ERM100 modules indicates that some error is present Refer to troubleshooting section of this manual to determine the
12. ow the menu to identify the connected ERM If the fields are blank select File gt Read From ERM to read a specific ERM s configuration In the Slave Status box the status of a specific slave can be displayed by clicking on the slave number 1 16 The numbers are highlighted in either normal green yellow or red Normal indicates that the slave is not configured Green indicates the ERM is successfully communicating with that particular slave Yellow indicates I O is being updating but some error exists within the I O of that slave and that there are no I O module errors in the slave Red indicates I O is not being updating or that the ERM is not communicating with that slave A description of the error will be listed The network I O modules and I O points are listed by slave and slot number For a PLC the first two words of memory in the Discrete Input table is used for ERM slave status information and the first word of memory in the Discrete Output table is for Disable Slave Command bits The PLC memory map information is not displayed if a WinPLC is selected as the CPU interface Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M 6 5 Chapter 6 Maintenance and Troubleshooting B Reserved PLC Memory for ERM The first two words of memory in the Discrete Input table is used for ERM slave status information and the first word of memory in the Discrete Output table is for Disable Slave Command bits The default
13. s CPU Do more Total Number D of 1 0 Cycles Average 0 Cycle Time ns ead ERM Sta Total Retries to All Slaves Last ERM Error no error Time of Last Read PLC Only 13 53 55 PLC Discrete Input Bytes PLC Mode Program A 4 Force Automatic used for ERM Status r Read ERM Status PLC Read 0 PLC Discrete Output Bytes in RUN mode Retries used for ERM Control PLC Write 0 Retries Firmware Status ERM State 8 Format 1 6 6 Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M Chapter 6 Maintenance and Troubleshooting DE E Select Slaves Window The left column displays the Ethernet Address IP Address Module ID and Model number of the modules currently on the remote I O network This means you are linking to the modules from your PC If you are linking to a module but the ERM is failing to communicate with the module you can conclude that e The module is working e The cabling is satisfactory from the PC to the hub and from the hub to the ERM module e The hub is working e The problem may be an addressing issue If the ERM is configured to use IP protocol make sure that the IP Address for the ERM and slave is valid and unique If the ERM is configured to use IPX protocol make sure that either the Module ID or Ethernet Address in the slave is correct and unique Select staves x Slave Configuration FIRST select the slaves to be controlled by t
14. to help identify the ERM module visually Do not mistake this user initiated event with a true ERM error condition The meaning of the diagnostic LEDs is explained on page 6 4 Troubleshooting Chart Legend L Off EE On ANSYFlash ERM Module LEDs Corrective Action LINKGD C LINKGD LJ 1 Cycle power on the CPU Interface unit This will clear ACT Ld R ACT CJ the ERROR if it was due to a transient condition ERROR Hl ERROR 2 Try another cable that you know works Check pinouts see page 3 7 Error ON Error Flashing 3 Try another port on the hub or another hub 4 Replace module 6 2 j Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M Chapter 6 Maintenance and Troubleshooting _ LBLDLU UA Troubleshooting Chart Continued Legend L Off EE On Flash ERM Module LEDs Corrective Action LINKGDL 1 1 Try another cable that you know works Check pinouts ACT L 1 see page 3 6 ERROR C 2 Try another port on the hub or another hub 3 Replace module No LEDs LINKGD MEM 1 Try another cable between PC and hub ACT L 2 Try another port on the hub or another hub ERROR L 3 Make sure you have not exceeded the recommended cable length for your network cable The link signal could arrive with sufficient strength even though the data transmission does not Only LINKGD ON 4 Could be related to Windows configuration Consult Windows documentation Note This is also the indication of proper
15. uery Network See Change Protocol on the next page Confirm that your PC has IPX or TCP IP protocol loaded Confirm that the modules LINKGD LED is on side of the ERM module See page 2 4 if you need help locating the label It is recommended to record the E NOTE The Ethernet Address is permanently assigned at the factory and it is recorded on a label on the module s Ethernet Address on a label and affix it near the module in a visible location Module Information The Module Information box provides the module Version Booter and Dip switch settings as well as Ethernet Stats and Errors Verify that all modules of the same type have the same firmware version Module Info EBC Settings EBC Help General Help General Info Ethernet Stats Firmware Rev 2 1 388 FWB Rev N Missed Fr 447 Bad Pkts 0 Booter Rev 3 0 92 PLD Rev N A TX Coll 257 Unknown 0 Switch Setting 00011001 CPU Rev N Lost Pkts 35802 TX Errors D Ready 6 8 Ethernet Remote Master User Manual 2nd Edition Rev A H24 ERM M Chapter 6 Maintenance and Troubleshooting _ D LLLDUIE Ethernet Stats If you are able to see the problem module on the list of modules currently active on the network you can select the module to see the Ethernet Stats for that module Select the module by clicking on the Ethernet Address in the Module box To begin a new statistical record click the Reset Stats button The diagnostic information available i
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