Chapter 6:dl205_ch2.qxd.qxd
Contents
1. MSB LSB Slave 16 Slave 1 DLX DLX 3 3 1 0 7 0 ERM Status Word MSB LSB DLX DLX DLX 3 33 3 3 32 2 7 07 0 MN Status Bits Error Code Disable Slave Bits MSB LSB Slave 16 Slave 1 DLY DLY 3 3 1 0 7 0 Detailed ERM Statistics The Slave Status Bits can be monitored to detect if a slave is in error The ERM Status Word contains the ERM error code and Status Bits see the following description and Error Codes in Appendix B Bit 8 indicates that the ERM is disabling a slave The Disable Slave Bits can be used to disable a slave from communicating with the ERM module Bit ON disable that specific slave RESET re enable the specific slave DirectLOGIC Slave Status Bits MSB V40414 LSB Slave 16 Slave 1 x Xx 3 3 1 0 7 0 ERM Status Word MSB V40415 LSB x XX X 3 33 3 3 32 2 7 07 0 IX Status Bits Error Code Disable Slave Bits MSB 40514 LSB Slave 16 Y y Slave 1 3 3 1 0 7 0 Detailed ERM Statistics provides 1 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 network2. A MAINTENANCE AND TROUBLESHOOTING In This Chapter Isolating a Communication Problem 0 cece eee eee ee eee eee 6 2 Diagnostic Tools and Techniques 0 0 0 0c cece eee eens 6 2 Troubleshooting Chart iu dia E Bow wr a a 6 2 ERM Module Diagnostic LEDS 0 ccc ccc eee ee ee eee eee 6 4 ERM LEDS iovrrincrorcarszar ria a a ER 6 4 Link Good Indicator 3 4 54is40 4eseu r ad ued 6 4 ACT Indicator sucia AE a ada ie la e RA 6 4 Eror indicator pis aspirar a Medea ide 6 4 Slave Module Diagnostic LEDS oo ooooomococooroooooooooooo o 6 4 EBC LEDS occ cues dda geese a eed AA e da A a ia dde 6 4 Error Indicator 5c cca arate eae ee tee wre la dd dd tee nee ee aa 6 4 Using ERM Workbench for Troubleshooting ooooooocoococoomo 6 5 Read from ERM senerare ado a a ae a ee a ac ll la nd 6 5 Reserved PLC Memory Tor ERM oe iaa cacao etnies ois la oe oad Be i eeu 8 6 6 Detailed ERM Statistics eee eee 6 6 Select Slaves Window ss sasse se 0 cee cence een eens 6 7 Using NetEdit for Troubleshooting 0 cece cee cee cee eee ee 6 8 Selecta Mod le cS ice scn nee ee be eee ete eee Rhee eae d 6 8 Module Informations sc v3 04 a3 ore ate ee ate ee bee eee sine eee a Se a ee a 6 8 Change Protocol 4 2062 05 204 eee ed A dd de eed 6 9 Replacing the ERM Slave Module 0 cee eee ee eee 6 9 Diagnosing Network Cable Problems 00 eee e eee eee eens 6 10 Chapte
3. tt currently linked to the NetEdit utility If your ERM or slave module is not on this list try the following e Change Protocol selection and click on Query Network See Change Protocol on the next page e Confirm that your PC has IPX or TCP IP protocol loaded Confirm that the modules LINKGD LED is on NOTE The Ethernet Address is permanently assigned at the factory and it is recorded on a label on the side of the ERM module See page 2 4 if you need help locating the label It is recommended to record 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 Ethemet Stats Firmware Rev 2 1 388 PWB Rev N A MissedFr 447 BadPkts 0 Booter Rev 3 0 92 PLD Rev N A TXColk 257 Unknown 0 Switch Setting 00011001 CPU Rev N A Lost Pkts 36802 TXEnors 0 Ready Num 6 8 Ethernet Remote Master User Manual 2nd Edition H24 ERM M Chapter 6 Maintenance and Troubleshooting M 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
4. Troubleshoot only if you are failing to exchange data LINKGD EEE LINKGD BEN 1 Try another cable between PC and hub or other ACT OR ACT E module and hub ERROR 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 H24 ERM M 6 3 Chapter 6 Maintenance and Troubleshooting es ERM Module Diagnostic LEDs ERM LEDs The ERM module has three indicator lights which show the status of the following esignal path between the ERM and the hub or slaves signal between ERM or between a PC and an ERM ERM module hardware LINKED IU ACT ERROR Link Good Indicator The green Link Good LINKGD LED is steady on when the ERM module is correctly connected to an active device on the network and is receiving 5VDC operating voltage from the PLC power supply The LINKGD LED verifies that the proper cables are connected and the ERM module is functioning correctly If a mismatch with the 10 100BaseT or 10BaseFL connections occurs this LED will not be illuminated ACT Indicator The red Activity ACT LED flashes to indicate that the module sees data travellin
5. 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 ES FIRST select the slaves to be controlled by this Ethemet Remote SECOND configure each slave Defauit can S 2 Configuation Master Up to 16 slaves can be added to an ERM s slave list work but adjustments may be necessary Slave Local H2 EBC PC Network Slaves on CP UDPAP _ EP s Slave List 00 062001911 Moast Mons Protocol 1PX 1D Number Slave Status 1 OO E0 62001911 Local Ethemet Address 2 Address Mode 00E062001911 ERM Timeout E to Slave 2 e Reties 1 8 Failures Before mee 3 Standby Mode 10 Watchdog is 11 Timeout 12 Pet Frequency 125 1 140 Count 16 Deaete none points Discrete A Danes none points E esa Ea none words Show in List Remove _Removeal Ge none words E K e i i Slaves Only aoe All Devices EA Query IP z Add to Network Worn 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 L
6. M 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 configuration window will be displayed ERM Module 00 0 62 20 13 2 ERM Workbench S2 lt lo xj Fie vew Hip OS 519 190 Ettwinet Remoa Master H2ERM EhametAd es 00E0622013E2 WP AHAB AB Moddel0 0 Steal 1 Configure EAM u Invertace PE oe e eee ere 2 Select Slaver Lon Er noone FLC Mode Progam S fe mM M5 mu fm Te Cek on siave 8 above Slave ro mor 2 White to ERM Tmd to ane s Last Enor Bius ne 10 40 31 Detaled ERM Status Clea Last Emer Siye 2 Ste Zs mortise YM Notes VADANA vons V514 Slave 1 Ethemet Addrasa 00 0 62 00 01 D4 on IPX Slave 1 5 0 16 Discrete Ingad 57 vone Slave 1 Siet 1 8 Discreto Outpet vass Slave 1 Skt 2 4 Word Input 1664 Binary 2 Word Output 16 44 Anay Siwe TIHEBC Potsmapiato Elbeenet Addbessf0 E062 40 05 H on IPX Slave 2 Skee 1 8 Dircrete Inge Slave 2 Sker 2 8 Double Word Output 228 Bray 8 Discreto Qupa V40515 Shove 2 51 3 8 Douie Woed Ingat v VRS ta By 4DoubleWodOupt VAR VAN ba Binary 8 Discrete Output yuo YM V40516 Ready Read ERM Status AUTO MODIFIED mm The ERM main configuration window lists the ERM s Ethernet Address IP Address Module ID just below the menu to identify the connected ERM If the fields are blank select File gt Read From ERM to read a
7. g on the network If any network device is sending or receiving data the ACT LED will be illuminated In idle mode no network traffic this LED is OFF During heavy communication loads this LED will be steady on Error Indicator If the ERM module s red ERROR indicator is flashing or steady on a fatal error has occurred The error may be in the ERM module itself or a network problem may be causing this symptom The ERROR indication can be caused by a faulty ground an electrical spike or other types of electrical disturbances Cycle power to the system to attempt clearing the error 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 T1 H 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 H24 ERM M Chapter 6 Maintenance and Troubleshooting Using ERM Workbench for Troubleshooting ERM Workbench can be used for troubleshooting an ERM Ethernet remote I O system It allows you to e 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 ER
8. ing or removing any system q WARNING Your system can be damaged if you install or remove system components before component Ethernet Remote Master User Manual 2nd Edition H24 ERM M 6 9 Chapter 6 Maintenance and Troubleshooting eee eee 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 e ERM module configuration is correct e RLL program is correct 6 e hubs are working correctly e Windows configuration is correct e 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 e Continuity This is a check to make sure the communication pairs a
9. ist NetEdit can be accessed from this window NetEdit is a software utility that can be used to set the Module ID set an IP 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 H24 ERM M 6 7 Chapter 6 Maintenance and Troubleshooting eee eee 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 e Examine and change the modules configuration settings e See the firmware revision number e 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 D Addresses of all modules which are 00 E0 62 00 19 11 pred H2 EBC 255 255 255 255 25 00 E0 62 216387 H2 ERM100 172 30 58 78
10. nt with a true ERM error condition The meaning of the diagnostic LEDs is explained on page 6 4 Troubleshooting Chart Legend Off HN On Flash ERM Module LEDs Corrective Action LINKGD LINKGD 1 Cycle power on the CPU Interface unit This will clear ACT OR act the ERROR if it was due to a transient condition ERROR MN 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 Ethernet Remote Master User Manual 2nd Edition H24 ERM M Chapter 6 Maintenance and Troubleshooting Troubleshooting Chart Continued Legend Off EE On Flash ERM Module LEDs Corrective Action LINKGD 1 Try another cable that you know works Check pinouts ACT see page 3 6 ERROR 2 Try another port on the hub or another hub 3 Replace module No LEDs LINKGD EE 1 Try another cable between PC and hub ACT 2 Try another port on the hub or another hub ERROR 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 Could be related to Windows configuration Consult Windows documentation Only LINKGD ON 4 Note This is also the indication of proper operation
11. 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 Detaled ERM Statistics 00 t0 62 21 6387 Mirian 1 0 pe CPU Interlace e Cycle Tene SS m Maxam 70 5 m CU Downe Cycle Tener Total Number o Last ERM Enor mo eno et 1 0 Cycler Average 1 0 Cycle Time Total Retest to 0 AN Shaver PLC Oriy PLC Mode Pogam PLC Decrete Inga Bytes y ured toe EAM Statur PLC Read 0 PLC Dncseto Dutra Bytes Retires aed ice EAM Corot E PLE Wite A Pets Femeie Status ERM Swe E fan 1 Tone ot Last Road 135355 Force Automatic TF Reed ERM Statut HRUN mode 6 6 Ethernet Remote Master User Manual 2nd Edition H24 ERM M Chapter 6 Maintenance and Troubleshooting M 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
12. r 6 Maintenance and Troubleshooting eee 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 other 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 The 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 to help identify the ERM module visually Do not mistake this user initiated eve
13. re 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 one end of the cable to the other e 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 e 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 link 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 6 1 0 Ethernet Remote Master User Manual 2nd Edition H24 ERM M
14. 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 H24 ERM M 6 5 Chapter 6 Maintenance and Troubleshooting 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 memory addresses DLX300 X300 and DLY300 Y300 are used in this example Do more Slave Status Bits
15. the Ethernet Address in the Module box To begin a new statistical record click the Reset Stats button The diagnostic information available in the Ethernet Stats box is e Missed Frames frames lost due to unavailability of buffer space e TX Collisions detected when RXD and RXD become active during a data transmission Two devices are trying to communicate at the same time e Lost Packets packets that overflow the queue e Bad Packets packets that fit the Ethernet standard but are not in the right format for the EBC module 6 e 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 Help changing the protocol and clicking on Scan Network You may be px rore 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 m g Scan Network disconnecting the system power To minimize the risk of equipment damage electrical shock or personal injury always disconnect the system power before install
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