Moxa Technologies RS-422, RS-485 General Troubleshooting, Hardware causes and solutions

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6

Troubleshooting

Common Industio CI-134 Series problems and possible solutions are listed below. If you still have problems, contact your dealer or Moxa for help. Or use the “Pr oblem Repor t For m” at the end of this manual to report problems to your dealer at once for faster technical support.

General Troubleshooting

1.The MOXA dr iver , while installing the dr iver , cannot detect the MOXA boar d.

Hardware causes and solutions:

a.The board is not installed or missing (absent). Please install it.

b.The board is not properly plugged in the system. If that is the case, re-install the board and make sure that it fits well in a 32-bit slot this time. Sometimes the slot for plugging the board is bad. In this case, try other slots until you find a good one.

2. The MOXA boar d and dr iver ar e activated but cannot tr ansfer (tr ansmit/r eceive) data.

Hardware Causes and Solutions:

a.Check for wrong cable wiring. Refer to the “Connection Cable and Cable Wiring” chapter for precise pin outs of the connector type you are using.

b.The cable or the board is defective. You may use other ports, cables or boards to verify. In addition, the PComm “Diagnostic” utility for Windows NT and Windows 95/98 is good for testing MOXA boards and port conditions. If Diagnostic reports error, replace the faulty components.

Industio CI-134 Series User’s Manual 6-1

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Contents Mar 1st Edition Industio CI-134 Series User’s ManualCopyright Notice Industio CI-134 Series User’s ManualTrademarks DisclaimerMoxa Internet Services Software Installation Hardware InstallationConnection Cable and Cable Wiring TroubleshootingTable of Contents Connection Cable and Cable Wiring TroubleshootingTechnical Reference Industio The Industrial Multiport Async Solution IntroductionOverview Termination Resistors Ready for RS-422/RS-485 Automatic Data Direction Control for RS-485Surge/Isolation Protection Asic Design, Compact SizeIntroduction Quick InstallationOperating System Support Moxa Serial Comm ToolsBroad Applications FeaturesSCO Xenix QNX Check ListInstallation Guide First Thing to Do Interface Settings Hardware Installation0x1C0 Quick Hardware InstallationHow to Do Quick Hardware Installation Hardware Installation with IO-IRQ Utility IO-IRQ Utility and Hardware Configuration 6Industio CI-134 Series User’s Manual Port Index AddressSpeed Nor mal Speed Spectr um High Speed Spectr um Press F10 to save the configuration and exit the utility 10Industio CI-134 Series User’s Manual Windows NT Software InstallationInstalling Driver Software Installation 4Industio CI-134 Series User’s Manual Port Number Rx Fifo TriggerTx Fifo Size 6Industio CI-134 Series User’s Manual Configuring Board and Port 8Industio CI-134 Series User’s Manual Removing Driver Updating DriverWindows 95/98 Software Installation 12Industio CI-134 Series User’s Manual Rx Fifo Trigger 14Industio CI-134 Series User’s Manual Updating Driver 16Industio CI-134 Series User’s Manual DOS Driver Setup Software Installation 20Industio CI-134 Series User’s Manual Por t number TxD buf size RxD buf size F5 Gr oup edit 22Industio CI-134 Series User’s Manual Unloading Driver Loading DriverWindows Software Installation Configuring Driver Baud Rate Settings 28Industio CI-134 Series User’s Manual PComm Installation Serial Programming ToolsWindows NT and Windows 95/98 Diagnostic for Moxa boards only PComm Programming LibraryUtilities Industio CI-134 Series User’s Manual Terminal Emulator Installing API-232 DOS API-232 LibraryData Scope 6Industio CI-134 Series User’s Manual Serial Programming Tools Diagnose Utility Windows Comm API Library Win16Existing Applications Automatic Data Direction Control Mode Recommended By RTS Mode For back-compatibilityRS-485 Programming Solution 12Industio CI-134 Series User’s Manual Connection Cable and Cable Wiring RS-422 Cable WiringCI-134 RS-422 Point-to-point RS-422 Broadcasting RS-485 Cable Wiring Impedance Matching and Termination Resistors DB-37 Connector Pin Outs For RS-422 ModeFor RS-485 Mode 6Industio CI-134 Series User’s Manual Troubleshooting General TroubleshootingHardware causes and solutions Software Causes and Solutions Io-ir q Remove the jumper on position JP1 Windows NT system panic blue scr een DOS Technical Reference SpecificationsUart TI550C IO/ Addr ess Device PC I/O Port Address MapProblem Report Form Return Procedure